Multiple Models Switch Adaptive Control

• Main Authors: Chu, Ching-Te, 朱清德
• Other Authors: Ming-Guo Her
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/26086046115695981538

碩士 === 大同工學院 === 機械工程學系 === 84 === Because of the slow parameter adaptation of the adaptive control law, the poor transient response generally exists. The main objective of this researchis to improve the transient response of adaptive system. The method for improving transient response is to make use of the multiple models, that is, estimating system parameters by using multiple models, selecting the model which estimates best according to appropriate performance index, and then usingthe controller to control the plant which corresponds to that identification model. By tis way, the transient response of adaptive system is improved. Note that the initial estimates of plant parameters are uniformly distributed in thecompact set that plant parameters exist. This research applies the "composite adaptation" concept which extracts information about parameters from all sources that contain it and uses a different adaptive law. We hope to obtain better transient response of adaptivesystem by using a different adaptation law. From the simulation results, it is known that multiple models and switch iseffective to improve the poor transient response of adaptive system and by using the composite adaptation law, we obtain better transient response.