胡超芳¹, 高志飞¹, 刘运兵¹, 王娜²
AuthorsHTML:胡超芳¹, 高志飞¹, 刘运兵¹, 王娜²
AuthorsListE:Hu Chaofang¹, Gao Zhifei¹, Liu Yunbing¹, Wang Na²
AuthorsHTMLE:Hu Chaofang¹, Gao Zhifei¹, Liu Yunbing¹, Wang Na²
Unit:1. 天津市过程检测与控制重点实验室，天津大学电气自动化与信息工程学院，天津 300072；2. 天津工业大学电气工程与自动化学院，天津 300387
Unit_EngLish:1．Tianjin Key Laboratory of Process Measurement and Control, School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
2．School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China
Abstract_Chinese:针对输入饱和下高超声速飞行器发生执行机构损伤故障并存在参数不确定的情况, 提出了一种基于Nussbaum增益技术的模糊自适应动态面容错控制策略．对于飞行器的高度和速度子通道, 分别设计了动态面和动态逆控制器．利用双曲正切函数逼近飞行器的输入饱和特性, 并基于中值定理将其转化为控制输入的仿射形式．对于损伤故障和参数不确定导致的控制增益未知问题, 通过引入Nussbaum增益技术既保证控制系统稳定, 又可以避免控制器奇异问题．通过设计模糊自适应系统, 在线逼近包含不确定参数与饱和逼近误差的未知函数项, 且引入范数估计思想, 使得每个模糊系统仅包含一个自适应参数, 以减小计算量．稳定性分析证明了闭环控制系统的半全局一致最终有界性, 仿真结果验证了该容错控制算法的有效性．
Abstract_English:For the hypersonic vehicles with input saturation and suffering from actuator damage fault and parameter uncertainty，a fuzzy adaptive dynamic surface fault-tolerant control strategy based on Nussbaum gain technique was proposed in this paper. For the altitude dynamics and velocity dynamics，the dynamic surface controller(DSC)and dynamic inversion controller were designed respectively. The hyperbolic tangent function was introduced to approximate the saturation function，and then the mean-value theory was used to affine transformation of inputs. To handle the unknown control gain resulting from damage fault and parameter uncertainty，the Nussbaum gain method was employed to ensure the stability of the control system and to overcome the possible singularity of the controllers. Additionally，the fuzzy adaptive strategy was adopted to approximate the unknown functions caused by uncertain parameters and saturation errors online. Moreover，the norm estimation method was utilized to decrease computation burden，where only one adaptive parameter was involved in each fuzzy system. The stability analysis verifies the semi-global uniformly ultimate boundedness of the closed-loop control system. The illustrative simulation demonstrates the effectiveness of the fault-tolerant control method.
Keyword_Chinese:高超声速飞行器; 容错控制; 动态面; 输入饱和; Nussbaum增益; 范数估计
Keywords_English:hypersonic vehicle; fault-tolerant control; dynamic surface; input saturation; Nussbaum gain; norm estimation

PDF全文下载地址:http://xbzrb.tju.edu.cn/#/digest?ArticleID=5825