Title :
Performance comparison of digital implementation of analog systems
Author :
Zhang, Guofeng ; Chen, Xiang ; Chen, Tongwen
Author_Institution :
Univ. of Electron. Sci. & Technol. of China, Chengdu
Abstract :
A new controller discretization approach, the generalized bilinear transformation (GBT), is proposed in [1]. Given an analog controller K, GBT generates a class of digital controllers Kgbt parameterized by alpha isin (-infin, infin). A geometric interpretation of GBT is first presented. Secondly, when the original analog feedback system is stable, a method is proposed to find the value of the parameter alpha which provides upper bound of the sampling period guaranteeing closed-loop stability of the resulting sampled-data system. Thirdly, it is shown that step-tracking is preserved if the closed-loop sampled-data system is stable. Finally, two examples are used to demonstrate the strength of our digitization approach.
Keywords :
bilinear systems; closed loop systems; digital control; feedback; sampled data systems; stability; analog feedback system; closed-loop stability; controller discretization approach; digital controllers; generalized bilinear transformation; sampled-data system; Analog computers; Analog-digital conversion; Control systems; Design methodology; Digital control; Emulation; Feedback; Optimal control; Stability; USA Councils; closed-loop stability; controller discretization; generalized bilinear transformation (GBT); optimization.;
Conference_Titel :
Decision and Control, 2007 46th IEEE Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-1497-0
Electronic_ISBN :
0191-2216
DOI :
10.1109/CDC.2007.4435041