Cone Clutch

Friction clutch with conical plates that engage when normal force exceeds threshold

Library:
Simscape / Driveline / Clutches

Description

The Cone Clutch block represents a friction clutch with a conical contact interface. The conical interface reduces the normal force required for clutch engagement by creating a wedging action between the clutch components, a cone and a cup. Cone clutch applications include synchromesh gearboxes, which synchronize the drive and driven shaft speeds to enable smoother engagement between transmission gears.

The cup component connects rigidly to the drive shaft, spinning with it as a unit. The cone component connects rigidly to the driven shaft, which sits in axial alignment with the drive shaft. The clutch engages when the cone slides toward the cup and presses tightly against its internal surface. Friction at the cone-cup contact interface enables the clutch to transmit rotational power between the drive and driven shafts. The friction model of this block includes both static and kinetic friction contributions, the latter of which leads to power dissipation during slip between the cone and cup components.

The Cone Clutch block is based on the Fundamental Friction Clutch block. For the complete friction clutch model, see Fundamental Friction Clutch. This section discusses the specialized model implemented in the Cone Clutch block.

When you apply a normal force, F_N, the Cone Clutch block can apply two kinds of friction, kinetic and static, to the driveline motion. The clutch applies kinetic friction torque only when one driveline axis is spinning relative to the other driveline axis. The clutch applies static friction torque when the two driveline axes lock and spin together. The block iterates through multistep testing to determine when to lock and unlock the clutch.

You can also enable faulting. When faulting occurs, the clutch will remain locked or will be unable to transmit power. Faults can occur at a specified time or due to an external trigger at port T.

Clutch Geometry and Variables

The figure shows the cone clutch geometry.

Clutch Variables

Parameter	Definition	Significance
d_o	Outer diameter of the conical contact surface	See the preceding figure
d_i	Inner diameter of the conical contact surface	See the preceding figure
α	Cone half angle	See the preceding figure
ω	Relative angular velocity (slip)	ω_F – ω_B
ω_Tol	Slip tolerance for clutch locking	See the following model
F_N	Normal force applied to conical surfaces	Normal force applied, if greater than threshold: F_N > F_th
α	Cone half-angle	See the preceding figure
r_eff	Effective torque radius	Effective moment arm of clutch friction force
k_K	Kinetic friction coefficient	Dimensionless coefficient of kinetic friction of conical friction surfaces. Function of ω.
k_S	Static friction coefficient	Dimensionless coefficient of static friction of conical friction surfaces.
τ_K	Kinetic friction torque	See the following model
τ_S	Static friction torque limit	(static friction peak factor)·(kinetic friction torque for ω → 0) (See the following model)

Relation to Fundamental Friction Clutch

The Cone Clutch block is based on the Fundamental Friction Clutch block. Instead of requiring the kinetic and static friction limit torques as input signals, the Cone Clutch block calculates the kinetic and static friction from the clutch parameters and the input normal force signal F_N.

Kinetic Friction

The kinetic friction torque is the product of four factors:

$τ_{K} = k_{K} \cdot F_{N} \cdot r_{e f f} \cdot sgn (ω)$

The kinetic friction torque opposes the relative slip and is applied with an overall minus sign. It changes sign when ω changes sign.

You specify the kinetic friction coefficient, k_K, as either a constant or a tabulated discrete function of relative angular velocity, ω. The tabulated function is assumed to be symmetric for positive and negative values of the relative angular velocity. Therefore, specify k_K for positive values of ω only.

The effective torque radius, r_eff, is the effective radius, measured from the driveline axis, at which the kinetic friction forces are applied at the frictional surfaces. It is related to the geometry of the conical friction surface geometry by:

$r_{eff} = \frac{1}{3 \sin α} \frac{d_{o}^{3} - d_{i}^{3}}{d_{o}^{2} - d_{i}^{2}}$

d_o and d_i are the contact surface maximum and minimum diameters, respectively.

Static Friction

The static friction limit is related to the kinetic friction, setting ω to zero and replacing the kinetic with the static friction coefficient:

$T_{S} = k_{S} \cdot F_{N} \cdot r_{e f f} \geq 0$

k_S > k_K, so that the torque, τ, needed across the clutch to unlock it by overcoming static friction is larger than the kinetic friction at the instant of unlocking, when ω = 0.

The static friction limit defines symmetric static friction torque limits as:

$τ_{S} \equiv τ_{S}^{+} = - τ_{S}^{-}$

The range [τ_S^–, τ_S⁺] is used by the Fundamental Friction Clutch.

Engagement and Locking Conditions

The clutch engages (transmits torque) when the conical friction surfaces are subject to a positive normal force and generate kinetic friction: F_N > 0 and τ_K> 0.

The clutch locks if and only if it is engaged, and the slip is less than the velocity tolerance: |ω| < ω_Tol.

Power Dissipated by the Clutch

The power dissipated by the clutch is |ω·τ_K|. The clutch dissipates power only if it is both slipping (ω ≠ 0) and applying kinetic friction (τ_K > 0).

Velocity-Dependent Model

You can model the effects of rotational velocity change by selecting a velocity-dependent model. To choose a velocity-dependent model, in the Friction settings, set the Friction model parameter to Velocity-dependent kinetic friction coefficient. For information about a friction model that depends on both velocity and temperature, see Thermal, Velocity-Dependent Model.

For the velocity-dependent model these related parameters become visible in the Friction settings:

Relative velocity vector
Kinetic friction coefficient vector
Friction coefficient interpolation method
Friction coefficient extrapolation method

Thermal Model

You can model the effects of heat flow and temperature change by selecting a temperature-dependent model. To choose a temperature-dependent model, in the Friction settings, set the Friction model parameter to Temperature-dependent friction coefficients. For information about a friction model that depends on both velocity and temperature, see Thermal, Velocity-Dependent Model.

For the temperature-dependent model, thermal port H and these settings are visible:

In the Friction settings:
- Temperature vector
- Static friction coefficient vector
- Kinetic friction coefficient vector
- Friction coefficient interpolation method
- Friction coefficient extrapolation method
In the Thermal Port settings:
- Thermal mass
- Initial Temperature

Thermal, Velocity-Dependent Model

You can model the effects of rotational velocity change and heat flow by selecting a velocity-dependent and temperature-dependent model. To choose a model that depends on both velocity and temperature, in the Friction settings, set the Friction model parameter to Temperature and velocity-dependent friction coefficients.

For the velocity-dependent and temperature-dependent model, thermal port H and these related settings and parameters become visible:

In the Friction settings:
- Relative velocity vector
- Temperature vector
- Static friction coefficient vector
- Kinetic friction coefficient matrix
- Friction coefficient interpolation method
- Friction coefficient extrapolation method
In the Thermal Port settings:
- Thermal mass
- Initial Temperature

Faulty Behavior

You can enable faulty behavior in response to:

Simulation time — Faulting occurs at a specified time.
Simulation behavior — Faulting occurs in response to an external trigger. This exposes port T.

You can choose either or both of these settings for block faulting. If faulting is triggered, the clutch responds according to the Behavior when faulted setting for the remainder of the simulation. The fault options are:

Cannot transmit power
Cannot unlock

You can set the block to issue a fault report as a warning or error message in the Simulink Diagnostic Viewer with the Reporting when fault occurs parameter.

Ports

Input

expand all

`N` — Normal force
physical signal

Physical signal port associated with the normal force. This signal is positive or zero. A signal of less than zero is interpreted as zero.

Dependencies

This port is visible only if, in the Geometry settings, the Shift linkage control parameter is set to Physical signal. For more information, see Shift linkage control and Geometry Parameter Dependencies.

`T` — External fault trigger
physical signal

Physical signal port for an external fault trigger. Triggering occurs when the value is greater than 0.5. There is no unit associated with the trigger value.

Dependencies

This port is visible when Enable faults is set to On and Enable external fault trigger is set to On.

Output

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`X` — Shift linkage position
physical signal

Physical signal port associated with shift linkage position.

Dependencies

This port is visible only when, in the Geometry settings, the Shift linkage control parameter is set to Conserving port. For more information, see Shift linkage control and Geometry Parameter Dependencies.

Conserving

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`B` — Base
mechanical rotational

Mechanical rotational conserving port associated with the driving (base) shaft. The clutch motion is measured as the slip ω = ω_F– ω_B, the angular velocity of follower relative to base.

`F` — Follower
mechanical rotational

Mechanical rotational conserving port associated with the driven or follower shaft

`H` — Heat flow
thermal

Thermal conserving port associated with heat flow.

Dependencies

This port is visible only when, in the Friction settings, the Friction model parameter is set to Temperature-dependent friction coefficients or Temperature and velocity-dependent friction coefficients. For more information, see Friction model and Friction Parameter Dependencies.

`S` — Shift linkage
mechanical rotational

Mechanical rotational conserving port associated with shift linkage.

Dependencies

Parameters

expand all

Geometry

The table shows how the visibility of some parameters depends on the option that you choose for other parameters. To learn how to read the table, see Parameter Dependencies.

Geometry Parameter Dependencies

Geometry
Contact surface maximum diameter
Contact surface minimum diameter
Cone half angle
Shift linkage control
`Physical signal`			`Conserving port`
Exposes physical signal input port N			Exposes: Conserving port S Physical signal output port X Shift Linkage settings

`Contact surface maximum diameter` — Outer diameter
`150` `mm` (default) | positive scalar

Outer conical diameter d_o.

`Contact surface minimum diameter` — Inner diameter
`100` `mm` (default) | positive scalar

Inner conical diameter d_i.

`Cone half angle` — Cone half angle
`12` `deg` (default) | positive scalar

Half opening angle α of the cone geometry.

`Shift linkage control` — Shift linkage model
`Physical signal` (default) | `Conserving port`

Shift linkage control model:

Physical signal — Expose physical signal ports N, which inputs the normal force, and X, which outputs for the shift linkage travel.
Conserving port — Expose conserving port, S, which is associated with shift linkage control.

Dependencies

The visibility of Shift Linkage settings and ports S, X, and N depend on this setting. For more information, see Geometry Parameter Dependencies.

Shift Linkage

These settings are visible only if, in the Geometry settings, the Shift linkage control parameter is set to Conserving port. For more information, see Shift linkage control and Geometry Parameter Dependencies.

`Hard stop at back of shift linkage` — Hard stop
`On` (default) | `Off`

Hard stop at back of shift linkage

`Ring-hub clearance when disengaged` — Ring-hub clearance
`3` `mm` (default) | nonnegative scalar

Ring-hub clearance when disengaged

`Ring stop stiffness` — Ring stop stiffness
`10e5` `N/m` (default) | nonnegative scalar

Ring stops stiffness

`Ring stop damping` — Ring stop damping
`1e3` `N/(m/s)` (default) | nonnegative scalar

Ring stop damping

`Shift linkage viscous friction coefficient` — Shift linkage viscous friction
`100` `N/(m/s)` (default) | positive scalar

Shift linkage viscous friction coefficient

`Linkage travel direction` — Disengagement travel direction
`Positive shift linkage displacement engages clutch` (default) | `Negative shift linkage displacement engages clutch`

Linkage travel direction that disengages the clutch

Friction

The table shows how the visibility of some ports, parameters, and settings depends on the option that you choose for other parameters. To learn how to read the table, see Parameter Dependencies.

Friction Parameter Dependencies

Friction
Friction model
`Fixed kinetic friction coefficient`	`Velocity-dependent kinetic friction coefficient`	`Temperature-dependent friction coefficients`	`Temperature and velocity-dependent friction coefficients`
`Fixed kinetic friction coefficient`	`Velocity-dependent kinetic friction coefficient`	Exposes: Conserving port H Thermal parameters in the Friction settings Thermal Port settings	Exposes: Conserving port H Thermal parameters in the Friction settings Thermal Port settings
-	-	Temperature vector	Temperature vector
-	Relative velocity vector	-	Relative velocity vector
Static friction coefficient	Static friction coefficient	Static friction coefficient vector	Static friction coefficient vector
Kinetic friction coefficient	Kinetic friction coefficient vector	Kinetic friction coefficient vector	Kinetic friction coefficient matrix
-	Friction coefficient interpolation method	Friction coefficient interpolation method	Friction coefficient interpolation method
-	Friction coefficient extrapolation method	Friction coefficient extrapolation method	Friction coefficient extrapolation method
Velocity tolerance	Velocity tolerance	Velocity tolerance	Velocity tolerance
Threshold force	Threshold force	Threshold force	Threshold force
Viscous drag torque coefficient	Viscous drag torque coefficient	Viscous drag torque coefficient	Viscous drag torque coefficient

`Friction model` — Friction model
`Fixed kinetic friction coefficient` (default) | `Velocity-dependent kinetic friction coefficient` | `Temperature-dependent friction coefficients` | `Temperature and velocity-dependent friction coefficients`

Parameterization method to model the kinetic friction coefficient. The options and default values for this parameter depend on the friction model that you select for the block. The options are:

Fixed kinetic friction coefficient — Provide a fixed value for the kinetic friction coefficient.
Velocity-dependent kinetic friction coefficient — Define the kinetic friction coefficient by one-dimensional table lookup based on the relative angular velocity between disks.
Temperature-dependent friction coefficients — Define the kinetic friction coefficient by table lookup based on the temperature.
Temperature and velocity-dependent friction coefficients — Define the kinetic friction coefficient by table lookup based on the temperature and the relative angular velocity between disks.

Dependencies

The friction model setting affects the visibility of other parameters, settings, and ports. For more information, see Friction Parameter Dependencies.

`Relative velocity vector` — Relative velocity
`[0, 100, 1000]` `rad/s` (default) | vector

Input values for the relative velocity as a vector. The values in the vector must increase from left to right. The minimum number of values depends on the interpolation method that you select. For linear interpolation, provide at least two values per dimension. For smooth interpolation, provide at least three values per dimension.

Dependencies

This parameter is visible only when the Friction model parameter is set to Velocity-dependent kinetic friction coefficient or Temperature and velocity-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Temperature vector` — Temperature
`[280, 300, 320]` `K` (default) | increasing vector

Input values for the temperature as a vector. The minimum number of values depends on the interpolation method that you select. For linear interpolation, provide at least two values per dimension. For smooth interpolation, provide at least three values per dimension. The values in the vector must increase from left to right.

Dependencies

This parameter is visible only when the Friction model parameter is set to Temperature-dependent friction coefficients or Temperature and velocity-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Static friction coefficient` — Static friction coefficient
`0.35` (default) | scalar

Static or peak value of the friction coefficient. The static friction coefficient must be greater than the kinetic friction coefficient.

Dependencies

this parameter is visible only when the Friction model parameter is set to Fixed kinetic friction coefficient or Velocity-dependent kinetic friction coefficient. For more information, see Friction Parameter Dependencies.

`Static friction coefficient vector` — Static friction coefficient
`[.4, .38, .36]` (default) | vector

Static, or peak, values of the friction coefficient as a vector. The vector must have the same number of elements as the temperature vector. Each value must be greater than the value of the corresponding element in the kinetic friction coefficient vector.

Dependencies

`Kinetic friction coefficient` — Kinetic friction coefficient
`0.3` (default) | positve scalar

The kinetic, or Coulomb, friction coefficient. The coefficient must be greater than zero.

Dependencies

This parameter is visible only when the Friction model parameter is set to Fixed kinetic friction coefficient. For more information, see Friction Parameter Dependencies.

`Kinetic friction coefficient vector` — Kinetic friction coefficient
`[.3, .22, .19]` (default) | `[.3, .28, .25]` | vector

Output values for kinetic friction coefficient as a vector. All values must be greater than zero.

If the Friction model parameter is set to

Velocity-dependent kinetic friction coefficient — The vector must have same number of elements as relative velocity vector.
Temperature-dependent friction coefficients — The vector must have the same number of elements as the temperature vector.

Dependencies

This parameter is visible only when the Friction model parameter is set to Velocity-dependent kinetic friction coefficient or Temperature-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Kinetic friction coefficient matrix` — Kinetic friction coefficient
`[.34, .32, .3; .3, .28, .25; .25, .2, .15]` (default) | matrix

Output values for kinetic friction coefficient as a matrix. All the values must be greater than zero. The size of the matrix must equal the size of the matrix that is the result of the temperature vector × the kinetic friction coefficient relative velocity vector.

Dependencies

This parameter is visible only when the Friction model parameter is set to Temperature and velocity-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Friction coefficient interpolation method` — Interpolation method
`Linear` (default) | `Smooth`

Interpolation method for approximating the output value when the input value is between two consecutive grid points:

Linear — Select this option to get the best performance.
Smooth — Select this option to produce a continuous curve with continuous first-order derivatives.

For more information on interpolation algorithms, see the PS Lookup Table (1D) block reference page.

Dependencies

This parameter is visible only when the Friction model parameter is set to Velocity-dependent kinetic friction coefficient, Temperature-dependent friction coefficients, or Temperature and velocity-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Friction coefficient extrapolation method` — Extrapolation method
`Linear` (default) | `Nearest` | `Error`

Extrapolation method for determining the output value when the input value is outside the range specified in the argument list:

Linear — Select this option to produce a curve with continuous first-order derivatives in the extrapolation region and at the boundary with the interpolation region.
Nearest — Select this option to produce an extrapolation that does not go above the highest point in the data or below the lowest point in the data.
Error — Select this option to avoid going into the extrapolation mode when you want your data to be within the table range. If the input signal is outside the range of the table, the simulation stops and generates an error.

For more information on extrapolation algorithms, see the PS Lookup Table (1D) block reference page.

Dependencies

`Velocity tolerance` — Relative velocity locking threshold
`0.001` `rad/s` (default) | scalar

Relative velocity below which the two surfaces can lock. The surfaces lock if the torque across the B and F rotational ports is less than the product of the effective radius, the static friction coefficient, and the applied normal force.

`Threshold force` — Normal contact force threshold
`1` `N` (default) | scalar

The normal force applied to the physical signal port N is applied to the contact only if the amount of force exceeds the value of the Threshold force parameter. Forces below the Threshold force are not applied so there is no transmitted frictional torque.

`Viscous drag torque coefficient` — Viscous drag torque
`0` (default) | nonnegative scalar

Viscous drag torque coefficient.

Initial Conditions

`Initial state` — Initial clutch state
`Unlocked` (default) | `Locked`

Clutch state at the start of simulation. The clutch can be in one of two states, locked and unlocked. A locked clutch constrains the base and follower shafts to spin at the same velocity, that is, as a single unit. An unlocked clutch allows the two shafts to spin at different velocities, resulting in slip between the clutch plates.

Faults

`Enable faults` — Fault option
`Off` (default) | `On`

Enable externally or temporally triggered faults. When faulting occurs, the clutch fails to unlock or cannot transmit power, according to the Behavior when faulted setting.

`Behavior when faulted` — Set fault response
`Cannot transmit power` (default) | `Cannot unlock`

Set fault response. You can select the clutch faulting as either:

Cannot transmit power
Cannot unlock

Dependencies

To enable this parameter, set Enable faults to On.

`Enable external fault trigger` — External trigger option
`Off` (default) | `On`

Enables port T. A physical signal at port T that is greater than 0.5 triggers faulting.

Dependencies

To enable this parameter, set Enable faults to On.

`Enable temporal fault trigger` — Temporal trigger option
`Off` (default) | `On`

Enables fault triggering at a specified time. When the Simulation time for fault event is reached, the clutch responds according to the Behavior when faulted setting.

Dependencies

To enable this parameter, set Enable faults to On.

`Simulation time for fault event` — Time at which faulting is triggered
`5 s` (default) | positive scalar

When the Simulation time for fault event is reached, the clutch responds according to the Behavior when faulted setting.

Dependencies

To enable this parameter, set Enable faults to On and Enable temporal fault trigger to On.

`Reporting when fault occurs` — Fault condition report
`None` (default) | `Warning` | `Error`

Reporting preference for the fault condition. When reporting is set to Warning or Error, a message is displayed in the Simulink Diagnostic Viewer. When Error is selected, the simulation will stop if faulting occurs.

Dependencies

To enable this parameter, set Enable faults to On.

Thermal Port

Thermal Port settings are visible only when, in the Friction settings, the Friction model parameter is set to Temperature-dependent friction coefficients or Temperature and velocity-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Thermal mass` — Thermal mass
`50` `kJ/K` (default) | scalar

Thermal energy required to change the component temperature by a single degree. The greater the thermal mass, the more resistant the component is to temperature change.

Dependencies

This parameter is only visible when, in the Friction settings, the Friction model parameter is set to Temperature-dependent friction coefficients or Temperature and velocity-dependent friction coefficients. For more information, see Friction Parameter Dependencies.

`Initial temperature` — Initial temperature
`300` `K` (default) | scalar

Component temperature at the start of simulation. The initial temperature alters the component efficiency according to an efficiency vector that you specify, affecting the starting meshing or friction losses.

Documentation

Cone Clutch

Description

Clutch Geometry and Variables

Relation to Fundamental Friction Clutch

Velocity-Dependent Model

Thermal Model

Thermal, Velocity-Dependent Model

Faulty Behavior

Ports

Input

N — Normal force physical signal

Dependencies

T — External fault trigger physical signal

Dependencies

Output

X — Shift linkage position physical signal

Dependencies

Conserving

B — Base mechanical rotational

F — Follower mechanical rotational

H — Heat flow thermal

Dependencies

S — Shift linkage mechanical rotational

Dependencies

Parameters

Geometry

Contact surface maximum diameter — Outer diameter 150 mm (default) | positive scalar

Contact surface minimum diameter — Inner diameter 100 mm (default) | positive scalar

Cone half angle — Cone half angle 12 deg (default) | positive scalar

Shift linkage control — Shift linkage model Physical signal (default) | Conserving port

Dependencies

Shift Linkage

Hard stop at back of shift linkage — Hard stop On (default) | Off

Ring-hub clearance when disengaged — Ring-hub clearance 3 mm (default) | nonnegative scalar

Ring stop stiffness — Ring stop stiffness 10e5 N/m (default) | nonnegative scalar

Ring stop damping — Ring stop damping 1e3 N/(m/s) (default) | nonnegative scalar

Shift linkage viscous friction coefficient — Shift linkage viscous friction 100 N/(m/s) (default) | positive scalar

Linkage travel direction — Disengagement travel direction Positive shift linkage displacement engages clutch (default) | Negative shift linkage displacement engages clutch

Friction

Friction model — Friction model Fixed kinetic friction coefficient (default) | Velocity-dependent kinetic friction coefficient | Temperature-dependent friction coefficients | Temperature and velocity-dependent friction coefficients

Dependencies

Relative velocity vector — Relative velocity [0, 100, 1000] rad/s (default) | vector

Dependencies

Temperature vector — Temperature [280, 300, 320] K (default) | increasing vector

Dependencies

Static friction coefficient — Static friction coefficient 0.35 (default) | scalar

Dependencies

Static friction coefficient vector — Static friction coefficient [.4, .38, .36] (default) | vector

Dependencies

Kinetic friction coefficient — Kinetic friction coefficient 0.3 (default) | positve scalar

Dependencies

Kinetic friction coefficient vector — Kinetic friction coefficient [.3, .22, .19] (default) | [.3, .28, .25] | vector

Dependencies

Kinetic friction coefficient matrix — Kinetic friction coefficient [.34, .32, .3; .3, .28, .25; .25, .2, .15] (default) | matrix

Dependencies

Friction coefficient interpolation method — Interpolation method Linear (default) | Smooth

Dependencies

Friction coefficient extrapolation method — Extrapolation method Linear (default) | Nearest | Error

Dependencies

Velocity tolerance — Relative velocity locking threshold 0.001 rad/s (default) | scalar

Threshold force — Normal contact force threshold 1 N (default) | scalar

Viscous drag torque coefficient — Viscous drag torque 0 (default) | nonnegative scalar

Initial Conditions

Initial state — Initial clutch state Unlocked (default) | Locked

Faults

Enable faults — Fault option Off (default) | On

Behavior when faulted — Set fault response Cannot transmit power (default) | Cannot unlock

Dependencies

Enable external fault trigger — External trigger option Off (default) | On

Dependencies

Enable temporal fault trigger — Temporal trigger option Off (default) | On

Dependencies

Simulation time for fault event — Time at which faulting is triggered 5 s (default) | positive scalar

Dependencies

Reporting when fault occurs — Fault condition report None (default) | Warning | Error

Dependencies

Thermal Port

Thermal mass — Thermal mass 50 kJ/K (default) | scalar

Dependencies

`N` — Normal force
physical signal

`T` — External fault trigger
physical signal

`X` — Shift linkage position
physical signal

`B` — Base
mechanical rotational

`F` — Follower
mechanical rotational

`H` — Heat flow
thermal

`S` — Shift linkage
mechanical rotational

`Contact surface maximum diameter` — Outer diameter
`150` `mm` (default) | positive scalar

`Contact surface minimum diameter` — Inner diameter
`100` `mm` (default) | positive scalar

`Cone half angle` — Cone half angle
`12` `deg` (default) | positive scalar

`Shift linkage control` — Shift linkage model
`Physical signal` (default) | `Conserving port`

`Hard stop at back of shift linkage` — Hard stop
`On` (default) | `Off`

`Ring-hub clearance when disengaged` — Ring-hub clearance
`3` `mm` (default) | nonnegative scalar

`Ring stop stiffness` — Ring stop stiffness
`10e5` `N/m` (default) | nonnegative scalar

`Ring stop damping` — Ring stop damping
`1e3` `N/(m/s)` (default) | nonnegative scalar

`Shift linkage viscous friction coefficient` — Shift linkage viscous friction
`100` `N/(m/s)` (default) | positive scalar

`Linkage travel direction` — Disengagement travel direction
`Positive shift linkage displacement engages clutch` (default) | `Negative shift linkage displacement engages clutch`

`Friction model` — Friction model
`Fixed kinetic friction coefficient` (default) | `Velocity-dependent kinetic friction coefficient` | `Temperature-dependent friction coefficients` | `Temperature and velocity-dependent friction coefficients`

`Relative velocity vector` — Relative velocity
`[0, 100, 1000]` `rad/s` (default) | vector

`Temperature vector` — Temperature
`[280, 300, 320]` `K` (default) | increasing vector

`Static friction coefficient` — Static friction coefficient
`0.35` (default) | scalar

`Static friction coefficient vector` — Static friction coefficient
`[.4, .38, .36]` (default) | vector

`Kinetic friction coefficient` — Kinetic friction coefficient
`0.3` (default) | positve scalar

`Kinetic friction coefficient vector` — Kinetic friction coefficient
`[.3, .22, .19]` (default) | `[.3, .28, .25]` | vector

`Kinetic friction coefficient matrix` — Kinetic friction coefficient
`[.34, .32, .3; .3, .28, .25; .25, .2, .15]` (default) | matrix

`Friction coefficient interpolation method` — Interpolation method
`Linear` (default) | `Smooth`

`Friction coefficient extrapolation method` — Extrapolation method
`Linear` (default) | `Nearest` | `Error`

`Velocity tolerance` — Relative velocity locking threshold
`0.001` `rad/s` (default) | scalar

`Threshold force` — Normal contact force threshold
`1` `N` (default) | scalar

`Viscous drag torque coefficient` — Viscous drag torque
`0` (default) | nonnegative scalar

`Initial state` — Initial clutch state
`Unlocked` (default) | `Locked`

`Enable faults` — Fault option
`Off` (default) | `On`

`Behavior when faulted` — Set fault response
`Cannot transmit power` (default) | `Cannot unlock`

`Enable external fault trigger` — External trigger option
`Off` (default) | `On`

`Enable temporal fault trigger` — Temporal trigger option
`Off` (default) | `On`

`Simulation time for fault event` — Time at which faulting is triggered
`5 s` (default) | positive scalar

`Reporting when fault occurs` — Fault condition report
`None` (default) | `Warning` | `Error`

`Thermal mass` — Thermal mass
`50` `kJ/K` (default) | scalar

`Initial temperature` — Initial temperature
`300` `K` (default) | scalar

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