Aerospace Blockset

Extending the Model

Modeling the airframe and guidance loop in a single plane is only the start of the design process. Extending the model to a full six-degrees-of-freedom representation requires the implementation of the full equations of motion for a rigid body.

There are two blocks for integrating the equations of motion in the Aerospace Blockset. Both of these blocks use standard Simulink component blocks. The first implementation uses a quaternion to represent the angular orientation of the body in space, which is ideal for simulations where the standard Euler angle definitions become singular as the pitch attitude tends to ±90 degrees. The second implementation uses the standard Euler angle equations of motion, which is ideal when using the model to obtain trim conditions and linear airframe models. A model containing one of the six-degrees-of-freedom equations of motion blocks is shown below.

Simulating the Missile Guidance System

References