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总结归纳了火箭TVC(Thrust Vector Control)伺服系统常用频率特性测试方法的原理和特点,发现了相关分析法和传统最小二乘拟合法的等价性质。提出一种改进的最小二乘拟合法,通过引入高次项使算法具有了对复杂漂移干扰的处理能力。定义了算法的评价准则,使用数值仿真分析了4种测试算法的性能,得出了不同算法在不同场合的适用性结论,仿真结果表明在复杂漂移干扰下本文提出的新算法精度高于其他3种传统算法。
Summarizes the principle and characteristics of the commonly used frequency characteristic test method of the rocket TVC (Thrust Vector Control) servo system, and finds the equivalent properties of the correlation analysis method and the traditional least squares fitting method. An improved least-squares fitting method is proposed. By introducing high order terms, the algorithm has the ability to handle complex drift disturbances. The evaluation criterion of the algorithm is defined. The performance of the four testing algorithms is analyzed by numerical simulation, and the applicability of different algorithms in different situations is drawn. The simulation results show that the new algorithm proposed in this paper is more accurate than the other three Traditional algorithms.