【摘要】 双联变频空调是非线性、时变、强耦合、多变量的控制对象;这使得过份依赖于被控对象精确的控制数学模型,如传递函数、高阶方程的经典控制方法难以实现。本文则着重于根据双联变频空调的运行特性,制定了双电子膨胀阀及压缩机的控制方法;并引进了负荷系数的概念和模糊推理方法。通过建立系统的动态热力学模型,利用仿真运算考察双电子膨胀阀开度及压缩机转速的调节对系统的控制结果,以验证控制方法的可行性。仿真结果表明此控制方法具有响应快,超调小,控温精度高,易于微机实现及实时控制性好的优点。更多还原

【Abstract】 According to the performance characteristics of double-evaporator air conditioner with inverter, the control strategies of the compressor-speed and the opening of electronic expansive valve has been established. Meanwhile, in order to improve the quality of the control strategies, load factor and fuzzy reasoning method are adopted. With the aid of systems dynamic mathematics model, a simulation research on the result of the control strategies has been carried out. Simulation results show that the control strategies adopted to this two-evaporator variable-refrigerant-volume system is satisfying.更多还原