动态测试信号采集仿真与实例分析 指导老师 摘要：本项目设计围绕课程讲授的动态信号的采集、分析与处理的基本原理与方法进行，包括以下三个部分内容：1、信号仿真、采集与分析处理；2、基于计算机的声信号采集与分析；3、机械运行数据分析与处理。运用信号的分析与处理等测试技术相关知识，借助 Matlab 软件，利用傅里叶变换等手段，对采集信号进行数学处理并做时域和频域分析，了解不同信号的特征，进而分析不同人的声音信号以及转子实验台运行的震动原因等。关键词：信号；频谱分析；傅里叶变换Abstract ： The project focuses on the basic principles and methods of dynamic signal acquisition, analysis and processing, including the following three parts: 1. signal simulation, acquisition and analysis process; 2. computer-based audio signal acquisition and analysis; 3. the mechanical operation of the data analysis and processing. With the Matlab software and the use of Fourier transform methods, using the testing technology –related knowledge, such as the signal analysis and processing, the paper makes the mathematical processing of the collected signals and time domain and frequency domain analysis to understand the different characteristics of the signal. Then it analyzes the sound signals of different people and the causes for a rotor vibration test machine.Key words：Signal; Spectrum Analysis; Fourier transform目 录1 引言............................................................................32 信号仿真、采集与分析处理........................................................42.1 问题陈述...................................................................42.2 问题分析...................................................................42.2 问题解答...................................................................52.2.1 采样频率对信号时域复现、频域分析的影响...............................52.2.2 采样频率与采样长度（采样点数）与频率分辨率的关系分析.................62.2.3 噪...
