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本文采用正交函数BPF将含有未知参数的系统线性微分方程转化为代数向量方程进行求解而完成辨识过程,获取表征系统特性的传递函数或微分方程参数.仿真辨识及对实际电液控制系统的辨识结果均表明,BPF辨识法具有原理简洁、实现方便及辨识精度高等优点.任何可积函数均可作为辨识输入信号,辨识过程可由递推算法实现.所以BPF辨识法能方便有效地用于动态过程的系统实时在线辨识.
In this paper, the orthogonal function BPF is used to convert the system linear differential equation with unknown parameters into the algebraic vector equation to solve the identification process and obtain the transfer function or differential equation parameters that characterize the system. Simulation identification and identification of the actual electro-hydraulic control system The results show that the BPF identification method has the advantages of simple principle, convenient implementation and high recognition accuracy. Any integrable function can be used as identification input signal, and recognition process can be realized by recurrence algorithm. Therefore, BPF identification method can be conveniently and effectively used in dynamic process Real-time online system identification.