一类不确定执行器非线性系统的自适应控制  

Adaptive control for a class of nonlinear systems with uncertain actuator nonlinearity

作　　者：刘棕成[1] 董新民[1] 薛建平[1] 张立鹏 

机构地区：[1]空军工程大学航空航天工程学院,陕西西安710038 [2]空军西安飞行学院,陕西西安710306

出　　处：《系统工程与电子技术》2015年第1期163-168,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金(61304120)资助课题

摘　　要：针对一类带不确定执行器非线性的控制系统,提出了一种自适应神经网络控制方法。建立了包括死区、齿隙和"类齿隙"磁滞特征的非线性执行器模型。通过结合所建立的模型和Nussbaum增益技术,解决了当执行器非线性不确定时的控制问题。所设计的方案不需知道非线性特征参数边界,并且当非线性特征为死区时,其坡度可以为时变的。引入了自适应补偿项消除建模误差和干扰的影响。仿真结果验证了该方法的有效性。An adaptive neural network control method is proposed for a class of control systems with uncer-tain actuator nonlinearity.A model for the nonlinear actuator is developed which includes the characteristics of dead zone,backlash and “backlash-like”hysteresis.By combining the developed model and the Nussbaum-gain technique,the problem of uncertain actuator nonlinearity is solved perfectly.The proposed scheme does not re-quire the prior knowledge on the bounds of parameters of the motioned characteristics,and the slopes of dead zone can be time variant when dead zone nonlinearity is concerned.The adaptive compensation term is adopted to minify the influence of modeling error and external disturbance.Simulation results are presented to demon-strate the effectiveness of this method.

关 键 词：自适应控制 执行器非线性 NUSSBAUM 函数 非线性系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]