Title :
Robustness analysis of multirate control systems in the frequency domain
Author :
Cishen Zhang ; Zhan, Jingxin
Author_Institution :
Dept. of Electr. & Electron. Eng., Melbourne Univ., Vic., Australia
Abstract :
This paper analyzes robustness of multirate control systems with fast control sampling rate and slow output measurement rate in the frequency domain. It is shown that the multirate control is characterized by manipulating the system frequency response in high frequency subbands and folding the high frequency subband response to the base frequency band. This amplifies the system loop gain in high frequency subbands leading to deterioration of system robustness stability under the uniform plant model perturbation.
Keywords :
closed loop systems; frequency-domain analysis; multivariable control systems; robust control; sampled data systems; base frequency band; fast control sampling rate; frequency domain; high frequency subbands; multirate control systems; robustness analysis; slow output measurement rate; system frequency response; system loop gain; uniform plant model perturbation; Australia; Control system analysis; Control systems; Frequency domain analysis; Frequency response; Poles and zeros; Robust control; Robust stability; Sampling methods; Transfer functions;
Conference_Titel :
Control, Automation, Robotics and Vision, 2002. ICARCV 2002. 7th International Conference on
Print_ISBN :
981-04-8364-3
DOI :
10.1109/ICARCV.2002.1234814
