Title :
Nonlinear distortion attenuation using H∞ techniques
Author :
Azzo, A.H. ; Sawan, M.E.
Author_Institution :
Dept. of Electr. Eng., Wichita State Univ., KS, USA
Abstract :
The authors consider a nominally linear system and investigate the deviation of the output due to a nonlinear deviation in the characteristic of a nominally linear component of the system. They introduce a feedback compensator and show that the closed-loop distortion is related to open-loop distortion through the so-called sensitivity matrix given by S=(I+GK-1 where G is the nominal transfer matrix of the system and K is the feedback compensator. H∞ optimization theory is applied to minimize the H∞ norm of S. The Glover-Doyle algorithm is utilized to find the optimal compensator that generates minimum nonlinear distortion
Keywords :
closed loop systems; control nonlinearities; feedback; linear systems; optimal control; sensitivity analysis; transfer functions; Glover-Doyle algorithm; H∞ techniques; closed-loop distortion; feedback compensator; minimum nonlinear distortion; nominally linear system; nonlinear distortion attenuation; open-loop distortion; optimal compensator; sensitivity matrix; Adaptive control; Attenuation; Control systems; Feedback loop; Frequency; H infinity control; Linear systems; Nonlinear distortion; State-space methods; Transfer functions;
Conference_Titel :
Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-0510-8
DOI :
10.1109/MWSCAS.1992.271110
