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为了提高液压伺服系统的控制精度,文章对液压伺服系统中的一些非线性参数进行了预测与估计。参数估计之前,首先对目标液压工作系统进行了建模与参数化描述,抽取了其控制和工作模型,计算并推导了模型中主要的液压参数直接的数学关系,如液压受力分析、受力传递函数、噪声信号过滤函数等。在此基础上,采用最小二乘估计算法对液压伺服系统中的非线性参数进行预测,给出了详细的参数分析过程和预测参数推导过程,建立了主要参数的估计计算公式。最后,对所估计的非线性参数进行了仿真和测试。结果表明,文章所选择的参数预测结果与实际的运行结果基本吻合,预测算法参数估计误差小。
In order to improve the control accuracy of hydraulic servo system, some nonlinear parameters in hydraulic servo system are predicted and estimated. Before parameter estimation, the hydraulic working system of the target was first modeled and parameterized. The control and working models were extracted and the direct mathematical relationships of the main hydraulic parameters in the model were calculated and deduced. For example, the hydraulic stress analysis, Transfer function, noise signal filtering function and so on. Based on this, the least squares estimation algorithm is used to predict the nonlinear parameters of the hydraulic servo system. The detailed parameter analysis process and the derivation of the prediction parameters are given. The calculation formulas of the main parameters are established. Finally, the estimated nonlinear parameters were simulated and tested. The results show that the parameters predicted by the article basically agree with the actual operation results, and the error of estimation of the prediction algorithm is small.