摘要： 热声机的频率特性主要取决于内部工质和装置结构。为了便于热声发电系统的研究，利用由无铁心永磁直线同步电机与谐振弹簧组成的直线谐振系统对热声机频率特性进行模拟。建立了直线谐振系统的数学模型，从而确定直线谐振系统的参数。并针对直线谐振系统周期性信号和周期性干扰的问题，采用重复控制策略实现直线谐振系统的高频响控制。仿真结果表明，直线谐振系统可以获得较高的频响与位移精度，良好地实现了对热声机频率特性的模拟。

关键词：直线谐振系统；热声机；频率特性；谐振频率；高频响
Abstract: The frequency characteristics of thermoacoustic engine mainly depend the internal working fluid and the device structure。In order to research thermoacoustic power generation system facilitately, the linear resonant system which is consist of ironless permanent magnet linear synchronous motor and the resonant spring was used to simulate the frequency characteristics of thermoacoustic engine. The parameters of linear resonant system was determined by building a mathematical model of linear resonant system. Aiming at the problems of periodic signals and periodic harmonic interference,repetitive control strategy was used to achieve high frequency response of linear resonant system. Simulation results show that linear resonant system gets a high response frequency and displacement accuracy and simulates the frequency characteristics of thermoacoustic engine effectively

Key words: linear resonant system; thermoacoustic engine; frequency characteristic; resonant frequency; high frequency response