An Optimal Sample-Data holds by using a Bi-Objective criterion: Trade-off between the Phase Delay and the Stability Robustness

作者：Abedi Seyed Mehdi^*

来源：Control Engineering and Applied Informatics, 2015, 17(2): 32-42.

• Optimal Sample-Data Holds
• Filter
• Sampled Data System
• ZOH
• Optimization

In this paper an optimal data-holding scheme is introduced which compensates the undesirable effects of ZOH. This effect will be improved by using a simple optimal filter, therefore the optimal dataholding scheme is consist of a standard ZOH and a filter. For designing this optimal filter two type cost functions or performance measures are defined in which phase delay or robust stability are considered. In this paper, firstly an optimal filter for minimizing these two cost functions will be introduced which its coefficients is optimized by using the imperialist Competitive Algorithm (ICA) method. Secondly a bi-objective cost function is presented in which both the phase delay and robust stability are considered and then the optimal filter will be designed for minimizing this new cost function. The Simulation and Experimental Results show that efficiency of the proposed optimal filter or proposed data-holding scheme is more than that of the previous optimal filters in each cost function.

• 出版日期2015-6