Incremental Shaft Encoder

Description

The Incremental Shaft Encoder block represents a device that converts information about the angular position of a shaft into electrical pulses. The block produces N pulses on ports A and B per shaft revolution, where N is the value you specify for the Pulses per revolution parameter. Pulses A and B are 90 degrees out of phase. If the shaft rotates in a positive direction, then A leads B. The block produces a single index pulse on port Z once per revolution. The Z-pulse positive transition always coincides with an A- pulse positive transition, and Z- pulse length is equal to the length for the A and B pulses. The voltages at ports A, B, and Z are defined relative to the Ref reference port voltage.

Use this block if you need to model the shaft encoder signals, either to support development of a decoding algorithm or to include the quantization effects. Otherwise, use the Ideal Rotational Motion Sensor block from the Simscape™ Foundation library.

Model Examples

Linear Electric Actuator with Control

A detailed implementation model of a controlled linear actuator. The actuator consists of a DC motor driving a worm gear which in turn drives a lead screw to produce linear motion. The model includes quantization effects of the Hall-effect sensor and the implementation of the control in analog electronics. There are multiple variant subsystems in this model that have models at varying levels of fidelity.