单活塞线性压缩机用动力吸振器理论分析与Matlab仿真

Theoretical Analysis and Matlab Simulation of Dynamic Vibration Absorber for Single-Piston Linear Compressor

单活塞线性斯特林制冷机由于其降温速度快、质量小和可靠性高等特点,目前正广泛用于红外探测器中,但是由于压缩机运行时产生的振动会严重影响探测器成像质量,所以在振动抑制方面动力吸振器的使用成为单活塞线性压缩机的最佳减振方式。基于此,本文首先论述了动力吸振器在单活塞线性压缩机减振方面的作用,并举例介绍了当前单活塞线性压缩机用动力吸振器的基本结构。为了不失理论分析的一般性,在动力吸振器与压缩机振动模型的理论计算中引入了几个重要的无量纲参数。最后在此基础上,利用Matlab软件对动力吸振器与压缩机模型进行振动幅频特性仿真。

Single-piston linear Stirling cryocoolers are widely used in infrared detectors owing to their fast cooling,lightweight,and high reliability.However,the vibration generated by the compressor during operation considerably affects the imaging quality of the detector.Therefore,the use of a dynamic vibration absorber has become the best vibration reduction method for single-piston linear compressors.First,this article discusses the role of a dynamic vibration absorber in damping single-piston linear compressors and provides an example of the basic structure of current single-piston linear compressors.Second,to generalize the theoretical analysis,several important dimensionless parameters are introduced in the theoretical calculation of the dynamic vibration absorber and compressor vibration model.Finally,Matlab is used to simulate the vibration amplitude-frequency characteristics of the dynamic vibration absorber and compressor model.