In an engineering control system it is of great importance that the control object is described by a distributed parameter system while the controller is governed by a lumped parameter system.
The system model comprises the dynamic heat exchanger model based on the lumped parameter method and moving phase boundary method, and the stable flow models of compressor and expansion valve.
系统模型中包含了用集总参数和相移动边界法建立的热交换器动态模型，以及压缩机和膨胀阀的稳态流动模型。
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The continuous model is adopted in the torsional vibration frequency and resonance of shaft system, the lumped parameter equivalent applied in the sub-synchronous resonance.