Title :
Approximate output tracking control for PWM systems with unacceptable zeros
Author :
Al-Numay, Mohammed ; Taylor, David G.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
Perfect output tracking, which requires inversion of the input-output dynamics, is not always a practical control objective. Difficulties are encountered for systems with zeros which are unstable, or stable but lightly damped. When the zeros are unacceptable in the above sense, perfect output tracking would require the control to be either unbounded, or bounded but highly oscillatory. In this paper, an approximate output tracking control design method is introduced for pulse-width modulated (PWM) systems with unacceptable zeros. The design method is applied to the nonlinear sampled-data model of the PWM system, and is based on output redefinition
Keywords :
nonlinear control systems; poles and zeros; pulse width modulation; sampled data systems; stability; tracking; PWM systems; approximate output tracking control design; input-output dynamics inversion; lightly damped stable zeros; nonlinear sampled-data model; output redefinition; pulse-width modulated systems; unacceptable zeros; unstable zeros; Control design; Control systems; Design methodology; Digital control; Digital modulation; Nonlinear dynamical systems; Piecewise linear techniques; Pulse width modulation; Space vector pulse width modulation; Switches;
Conference_Titel :
Control Applications, 1996., Proceedings of the 1996 IEEE International Conference on
Conference_Location :
Dearborn, MI
Print_ISBN :
0-7803-2975-9
DOI :
10.1109/CCA.1996.558907
