Adaptive stabilization of discrete-time systems using linear periodically time varying controllersA direct adaptive scheme based on the use of linear time-varying periodic controllers is proposed which estimates online the periodic coefficients of the controller. It is shown that adaptive stabilization is attained for all possibly nonstably invertible plants of known order but unknown delay. Although no appeal is made to persistency of excitation arguments, a provision is needed to avoid the singularity of an estimated matrix, this property being required only for the analysis and not the control calculations.
Document ID
19890041285
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ortega, Romeo (Illinois, University Urbana, United States)
Albertos, Pedro (Valencia, Universidad Politecnica, Spain)
Lozano, Rogelio (NASA Langley Research Center Hampton, VA, United States)