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系统传递函数表达了一个系统的特性,计算系统传递函数是系统理论的中心问题之一。在工程、电信号以及光学中的系统都是比转复杂的,因此研究某种系统或设计某种系统时往往需要寻求一些简便的计算方法。长春光机所计算室的同志根据他们多年的实践经验,提出了按照系统方框图列写传递函数的一种简便方法,这种计算系统传递函数的方法直观具体,使用方便,且便于记忆。本文利用系统理论通过z变换和Fourier变换,对光机所同志提出的经验公式给以严格的理论论证。
The system transfer function expresses the characteristics of a system. Calculating the transfer function of the system is one of the central issues in system theory. Systems in engineering, electrical signals, and optics are complex, so it is often necessary to find some simple calculations when working on a system or designing a system. Based on their years of practical experience, comrades in the computing room of Changchun Institute of Optics and Technology proposed a simple and convenient method of writing transfer functions in accordance with the system block diagram. The transfer function method of this computing system is intuitive and specific, easy to use and easy to remember. In this paper, we use the system theory to pass the z-transform and the Fourier transform, and give rigorous theoretical proof to the empirical formula put forward by the comrades of optical machines.