IEEE Trans Cybern. 2017 Sep;47(9):2400-2412. doi: 10.1109/TCYB.2017.2684131. Epub 2017 Apr 10.
This paper investigates the problem of observer-based adaptive fuzzy control for a category of nonstrict feedback systems subject to both unmodeled dynamics and fuzzy dead zone. Through constructing a fuzzy state observer and introducing a center of gravity method, unmeasurable states are estimated and the fuzzy dead zone is defuzzified, respectively. By employing fuzzy logic systems to identify the unknown functions. And combining small-gain approach with adaptive backstepping control technique, a novel adaptive fuzzy output feedback control strategy is developed, which ensures that all signals involved are semi-globally uniformly bounded. Simulation results are given to demonstrate the effectiveness of the presented method.
本文研究了一类非严格反馈系统的基于观测器的自适应模糊控制问题，该系统同时存在未建模动态和模糊死区。通过构造模糊状态观测器和引入重心法，分别对不可测状态进行估计和解模糊化模糊死区。利用模糊逻辑系统来识别未知函数。并结合小增益方法和自适应反步控制技术，提出了一种新的自适应模糊输出反馈控制策略，保证了所有涉及的信号都是半全局一致有界的。仿真结果验证了所提出方法的有效性。
