A Discrete-Time Direct Adaptive Multiple-Model Control Scheme

摘要：

A new multiple-model adaptive control scheme for discrete-time systems is developed to improve the adaptive system transient response, by using a direct model reference adaptive control design. Such a scheme employs a bank of direct adaptive controllers whose parameters are initialized from different parameter subregions and directly updated on-line. A control switching mechanism is set up, by finding the minimal performance cost index which is based on estimation errors generated from the tracking error and the individual controller parameter estimates, to select the most appropriate controller to generate the control signal. Such a multiple-model adaptive scheme for systems with unknown sign of the system high frequency gain is also designed, by constructing two controllers whose adaptation is from modified robust adaptive laws with positive and negative adaption gains respectively. Simulation results are presented to show the improved system transient responses, as compared with that of a single-model adaptive control system, and the desired system performance in the system with unknown sign of the system high frequency gain.

关键词： Multiple-Model Design Direct Adaptive Control Transient Response Stability and Tracking

作者: TAN Chang TAO Gang QI Ruiyun

作者单位: College of Automation Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016 College of Automation Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016

会议类型: 国际会议

会议名称: The 31st Chinese Control Conference(第三十一届中国控制会议)

会议地点: 合肥

会议语种:英文

页码: 2997-3002

在线出版日期: 2012-07-01（万方平台首次上网日期，不代表论文的发表时间）