【摘要】 介绍了循环平稳信号的理论及其自相关函数和谱特性,论述了如何在信号处理中对信号进行循环自相关函数分析来判别信号的循环平稳性。由于感应同步器存在加工工艺误差以及安装上的误差,导致了转台测角系统误差,对误差信号的二阶统计量进行分析证明它为非平稳信号,为小波重构测角系统误差提供了理论依据。采用db3小波对测角系统误差信号进行分解与重构,重构标准差小于测角系统精度,重构信号满足精度要求,可以用重构信号代替原误差信号进行计算机误差补偿。更多还原

【Abstract】 Cyclostationary signal theory and its auto -correlation function and spectrum characteristics are introduced .cyclic auto-correlation function is analysed to distinguish the Cyclostationary signal in signal processing. Manufacturing and installation errors of an inductosyn result in the angular measuring system errors of a turntable. Error signals are analysed and tested to be as Cyclostationary signals, theory is provided to reconstruct angular measuring system errors by wavelet analysis. Error signals are decomposed and reconstructed by db3 wavelet .reconstructed normal variation is less than angular measuring system precision, reconstructed signals are used to compensate the system errors instead of original error signals.更多还原