热声直线电机起动及发电控制策略的研究

The Study on Starting/Generating Control Strategy of A Thermoacoustic Linear Motor

本文针对热声发动机起振温度高、谐振管耗散的声功大和系统体积庞大等问题，提出了一种基于起动及发电运行的控制方法。通过对热声发电系统（TAEGS）基础知识的了解，并对热声发动机起振机理的分析，建立了热声发电系统的数学模型，研究了起动控制和发电控制的不同控制策略。在Matlab／Simulink环境下进行仿真，结果表明，基于起动及发电控制的热声发电系统起振时间短，热声电转换效率有所提高，为热声技术投入到生产实践中利用低品质热源提供了可行性保证。

Aiming at the problems of high starting temperature, large acoustic power dissipation and huge volume of the thermoacoustic engine, a control method based on starting/generating bidirectional operation is proposed. Based on the understanding of the basic knowledge of thermoacoustic electric generation system（TAEGS） and the analysis of the thermoacoustic engine＇s starting mechanism, a mathematical model of thermoacoustie power generation system is established, and different control strategies for starting control and power generation control are studied. The simulation results in Matlab/Simulink environment show that the thermoacoustic power generation system based on start/generate bidirectional control has shorter starting time and higher thermal- acoustic-electricity （T-A-E） conversion efficiency, which provides a feasible guarantee for the thermoacoustic technology to be put into production practice in using low quality heat source.