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满足给定规范功率谱要求的随机信号产生是我们在研制基于双微机并行工作结构的数控随机振动系统时要解决的一个主要问题。本文在现有文献的基础上,对这种信号的合成方法进行更全面和详尽的理论推导和分析。重点讨论时域和频域随机化,窗函数选择及信号所需满足高斯性、平稳性和遍历性等问题。文中还讨论了互为独立均匀分布的随机相位和时延的硬件产生和软件实现。文章最后介绍了笔者在FDP11/23小型机上用FORTRAN语言所做的仿真试验及结果的统计分析。实验结果表明本文的理论分析是正确的。
The generation of random signals to meet the power spectrum requirements of a given specification is one of the main problems to be solved when we develop a NC random vibration system based on a dual-computer parallel working structure. Based on the existing literature, this article makes a more comprehensive and detailed theoretical derivation and analysis of the synthesis method of this signal. Focus on the time and frequency domain randomization, window function selection and signal needed to meet the Gaussian nature, stability and ergodicity and other issues. The paper also discusses the hardware production and software implementation of random phases and delays mutually independent and evenly distributed. At the end of this article, the author introduces the author’s statistical analysis of the results of the simulation experiment and the FORTRAN language on the FDP11 / 23 minicomputer. The experimental results show that the theoretical analysis of this paper is correct.