基于相位校正LESO的飞行器姿态控制  

Aircraft Attitude Control Based on Phase Modified LESO

作　　者：王明欣 刘丽霞[1] 王欣[1] WANG Ming-xin;LIU Li-xia;WANG Xin(Beijing Institute of Control&Electronics Technology,Beijing 100038,China)

机构地区：[1]北京控制与电子技术研究所,北京100038

出　　处：《计算机仿真》2023年第7期38-43,共6页Computer Simulation

摘　　要：高速飞行器主动段飞行过程中由于质心、压心、动压、舵效等高动态变化带来飞行器气动参数不确定性大、通道耦合严重及外干扰强非线性等特点,从而使得飞行器主动段的高精度稳定控制成为一项难题。研究了一种基于相位校正的扩张状态观测器的高精度强鲁棒姿态控制方法解决了上述难题,并重点针对扩张状态观测器参数配置难、依赖大增益的问题进行研究。首先,通过干扰估计量的传递函数分析了线性扩张状态观测器的干扰补偿原理,并从频域角度上的分析指出其干扰估计误差来源于相角滞后。接着通过降阶和安排相位校正网络对线性扩张观测器进行改进,保证在较小的增益系数下估计能力得到提升。仿真结果表明了上述方法的有效性。During the active phase flight of high-speed aircraft,serious dynamic changes such as center of mass,center of pressure,dynamic pressure,and rudder effect result in high uncertainty of aircraft aerodynamic parameters,severe channel coupling,and strong nonlinearity of external interference,making high-precision stable control of the active phase of the aircraft a challenge.In this paper,a high-precision and robust attitude control method based on phase correction of the extended state observer was proposed to solve this problem,and the problem of difficult parameter configuration and large gain dependence of extended state observer was emphatically studied.Firstly,the principle of disturbance compensation of linear extended state observer was analyzed through the transfer function of disturbance estimator,and based on analysis in the frequency domain,it was pointed out that the interference estimation error came from the phase angle lag.Then,the linear extended observer was improved by decreasing order and arranging phase correction network to ensure that the estimation ability can be improved under small gain coefficient.Simulation results show the effectiveness of the proposed method.

关 键 词：线性扩张状态观测器 高超声速飞行器 姿态控制 频带特性 

分 类 号：TJ765.43[兵器科学与技术—武器系统与运用工程]