飞机舵机电动加载系统的非线性干扰抑制方法

Nonlinear Interference Suppression Methods

摘要:

飞机舵机电动加载系统是一个复杂的非线性机电控制系统，在运行过程中会产生多余力矩、摩擦、机械间隙等非线性干扰。针对以上问题，介绍了系统的硬件结构和工作原理，建立了系统的数学模型。在此基础上分析了非线性干扰的产生机理和工作特性，并根据加载系统领域非线性干扰抑制方法的研究，从结构与控制的两个方面进行归纳分类，进行性能对比以及适用性分析。针对多余力矩抑制的问题，提出了模型预测控制方案对其进行补偿，实验结果表明可以较准确地跟踪指令力矩，误差率小于1.93%，多余力矩的消除率达到95.86%。证明了所提出的方案的有效性，能够改善多余力矩的抑制能力，提高系统跟踪精度。

Abstract:

The aircraft rudder electric loading system is a complex and nonlinear electromechanical control system, which may produce nonlinear interference such as extra torque, friction and mechanical clearance during operation. Aimed at the above problems, the hardware structure and working principle of the system are introduced, and the mathematical model of the system is established. On this basis, the generation mechanism and working characteristics of nonlinear interference are analyzed. According to the research of nonlinear interference suppression methods in the field of loading system, the structure and control are also summarized and classified, and the performance is compared and the applicability is analyzed. As to the problem of the suppression of extra torque, a model predictive control scheme is proposed to compensate the extra torque. Experimental results show that the command torque can be tracked accurately, the error rate is less than 1.93%, and the excess torque elimination rate is up to 95.86%. The effectiveness of the proposed scheme is proved, which can improve the suppression ability of extra torque and increase the tracking accuracy of the system.