Modern control techniques provide a direct way to design multiloop controllers for multi‐input/multi‐output (MIMO) systems by closing all the loops simultaneously. This chapter first extends some classical frequency‐domain analysis techniques to multivariable systems using the notion of the singular value (SV). Next, a convenient robust output feedback design approach is presented that results in acceptable time‐domain performance with guaranteed robustness. The chapter then covers the design of multivariable observers for estimating the full state of the aircraft model from the measured outputs. Kalman filter is then discussed, showing an example of its use by reconstructing the angle of attack from normal acceleration and pitch‐rate measurements in the presence of wind gust noise. The chapter shows how to use full state feedback and an observer to design a dynamic regulator. Finally, it describes the popular linear quadratic Gaussian/loop transfer recovery (LQG/LTR) robust design technique.
Robustness and Multivariable Frequency‐Domain Techniques
2015-11-02
84 pages
Article/Chapter (Book)
Electronic Resource
English
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