基于不相关性的非稳态信号解耦技术  

Study of Non-stationary Signal Decoupling Based on Decorrelation

作　　者：孟庆华[1] 赵文礼[1] 曾复[1] 樊志华[1] 

机构地区：[1]杭州电子科技大学机械工程学院,杭州310018

出　　处：《农业机械学报》2009年第5期203-206,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(60572052)

摘　　要：对两路非稳态随机实值信号通过一个线性未知系统后得到两路输出信号的解耦问题进行了探讨。首先建立了非稳态信号的两路输入、两路输出系统的数学模型,将系统的解耦问题转换成求解系统的解耦系数问题。然后对解耦系数的求解进行推导,并给出算法适用的必要条件是信号为非稳态和不相关。通过计算出的解耦系数将源信号从测得的输出耦合信号中分离。通过本算法对人工耦合成的两路信号进行了解耦,结果证明了本算法的正确性。最后将算法应用到了研发的差速器检测试验台上,解耦结果满足了工程实际需要。This paper described a decoupling algorithm for two signals input and two signals output that is based on non-stationary real signal. Firstly, a model about two non-stationary signals through a linear system outputting two signals was built. According to the model, the system＇s decoupling was translated into resolving the system＇s decoupling coefficients. Secondly, the requirements of the algorithm were derived which making the algorithm work correctly. The signals being non-stationary and decorrelation must to be emphasized. Thirdly, the source signals are de-mixing from two output signals through the decoupling coefficients. Two coupled signals were decoupled by using the algorithm and the result proves the validity of the algorithm. The algorithm was already applied to a differential testing bench and the decoupling result can satisfy the engineering requirement.

关 键 词：解耦 非相关 非稳态信号 随机信号 

分 类 号：TP14[自动化与计算机技术—控制理论与控制工程]