Title :
Robust eigenstructure assignment for multirate control systems
Author :
Patel, Y. ; Patton, R.J. ; Burrows, S.P.
Author_Institution :
R. Mil. Coll. of Sci., Wiltshire, UK
Abstract :
The design of feedback controllers for multirate digital systems is considered. The two main problems associated with such a scheme are the adverse effects of intersample cross-coupling and the large, switched control signals that normally result from a multirate feedback structure. The two problems present conflicting design objectives. Thus, a solution must seek to achieve an acceptable compromise between the minimization of control effort and the assignment of a prescribed modal structure. An optimized eigenstructure assignment method is developed to provide for this trade-off. The achievement of each design objective is governed by weighting factors in the optimization cost function. The design of a stability augmentation system for the lateral motion of an aircraft illustrates the application of this method
Keywords :
control system synthesis; eigenvalues and eigenfunctions; feedback; stability; aircraft lateral motion; control effort minimization; feedback controllers; intersample cross-coupling; modal structure assignment; multirate control systems; multirate digital systems; optimization cost function; robust eigenstructure assignment; stability augmentation system; switched control signals; weighting factors; Adaptive control; Aircraft; Control systems; Cost function; Design optimization; Digital systems; Feedback; Optimization methods; Robust control; Stability;
Conference_Titel :
Control Applications, 1992., First IEEE Conference on
Conference_Location :
Dayton, OH
Print_ISBN :
0-7803-0047-5
DOI :
10.1109/CCA.1992.269731
