Design of a Pole-Zero Placement Controller in Adaptive System Subject to Saturation Constraints

• Main Authors: Yih-Tzong Cheng, 鄭憶宗
• Other Authors: Chiang-Cheng Chiang
• Format: Others
• Language: en_US
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/76056299981407273873

碩士 === 大同工學院 === 電機工程研究所 === 81 === This thesis is to provide the "feedback-feedforward adaptive controller" with pole-zero placement for adaptive systems subject to saturation constraints such that the type-I unstable plants can be tackled well, not necessarily for stable plants. The first part of this thesis introduces the "feedback-feedforward adaptive controller" which allows arbitrary poles and zeros assignment in the resulting closed -loop system without knowing the z-transform of the reference signal for not necessarily minimum phase and/or stable plants. Moreover, the restrictions that the zeros of the reference model must contain the unstable zeros of the plant to be controlled can be relaxed. Next, we consider a class of type-I plants and the "feedback-feedforward adaptive controller" which is constrained by a saturation non-linearty. Based on the theory of optimal control, the concept of functional analysis, and the technique of parameter estimation, the conditions of the robust stability of the overall adaptive control systems with saturation constraints will be derived; furthermore, the poles and zeros of the system can be adeguately assigned by the proposed design algorithm. Finally, some simulations are provided to illustrate the performance of the suggested adaptive control algorithm.