Quaternion Normalize

Normalize quaternion

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  • Library:

  • Aerospace Blockset / Utilities / Math Operations

  • Quaternion Normalize block

Description

The Quaternion Normalize block calculates a normalized quaternion for a given quaternion. Aerospace Blockset™ uses quaternions that are defined using the scalar-first convention. For the equations used for the quaternion and normalized quaternion, see Algorithms.

Ports

Input

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Quaternions in the form of [ q 0 , r 0 , ..., q 1 , r 1 , ... , q 2 , r 2 , ... , q 3 , r 3 , ...], specified as a quaternion or vector of quaternions.

Data Types: double

Output

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Normalized quaternion or vector of normalized quaternions.

Data Types: double

Model Examples

Quaternion Estimate from Measured Rates

Quaternion Estimate from Measured Rates

How to estimate a quaternion and model the equations in the following ways:

Open Model

Algorithms

The quaternion has the form of

q=q0+iq1+jq2+kq3.

The normalized quaternion has the form of

normal(q)=q0+iq1+jq2+kq3q02+q12+q22+q32.

References

[1] Stevens, Brian L., Frank L. Lewis. Aircraft Control and Simulation, Second Edition. Hoboken, NJ: Wiley–Interscience.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

See Also

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Introduced before R2006a

Aerospace Blockset Documentation

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