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两维转镜的动态控制误差是影响激光制导武器对抗闭环半实物仿真试验精度的重要误差源,建立准确的控制误差模型是系统精度分析的基础。对于转镜的动态控制误差分析建模问题,常采用经典的频域设计法建立控制系统的传递函数来分析其控制误差,建模过程复杂且难以建立准确的模型,提出了一种过程辨识的方法,分析了辨识原理、辨识输入信号设计、模型阶次及模型参数的辨识方法等,在使用行列式比定阶法确定模型阶次的基础上,采用递推最小二乘法建立了转镜的等效动态控制误差模型。然后,根据转镜控制系统指标设计等效正弦信号对该模型进行了验证,结果表明:动态控制误差模型估计输出与实际仿真输出基本相同,估计误差均值为0°,最大值仅为13″,说明了建模的准确性,同时也为激光制导武器对抗闭环半实物仿真试验系统中其他仿真设备的建模提供了方法支持。
The dynamic control error of two-dimensional rotating mirror is an important error source that affects the accuracy of the laser-guided weapon against the closed-loop semi-physical simulation test. Establishing the accurate control error model is the basis of the system accuracy analysis. For the modeling problem of dynamic control error analysis of rotating mirror, the transfer function of the control system is often used to analyze the control error by using the classical frequency-domain design method. The modeling process is complex and it is difficult to establish an accurate model. A process identification Method, identification principle, identification of input signal design, model order and identification of model parameters are analyzed. On the basis of determining the order of the model by determinant of determinant, recursive least square method Equivalent dynamic control error model. Then, the model is validated by designing an equivalent sinusoidal signal according to the index of the rotating mirror control system. The results show that the estimated output of the dynamic control error model is basically the same as the actual simulated output, with an average error of 0 ° and a maximum of only 13 " The accuracy of the modeling is illustrated. At the same time, this method also provides the method support for the modeling of laser-guided weapons against other closed-loop hardware-in-the-loop simulation systems.