本文通过理论分析及实验测试,研究燃气机热泵系统启动过程和大范围变容量调节过程中系统流量特性,提出了适合于燃气机热泵系统的电子膨胀阀流量控制策略。结果表明文中所提出的模糊自适应PID控制方法和模糊PID控制方法的控制性能要优于常规的PID控制方法。
This paper presents an advanced control strategy for the refrigerant teed control using an electronic expansion valve in the gas engine-driven heat pump (GEHP) system based on the theory analysis and experimental testing, especially for the start-up and sudden large changes conditions. The results indicate that the fuzzy self-tuning PID and the fuzzy-PID methods presented in this study have higher precision, smaller overshoot compared with common PID controller.