Because of the mighty computing and logically analyzing function of computers, digital controllers have become one of the main ways in the realization of automotive control system.
由于计算机具有强大的计算及逻辑判断功能，数字控制器正逐渐成为实现自动控制系统的主要手段。
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Mathematical model and control law of the digital electro hydraulic proportion system are put forward. Furthermore, computing simulation and experimental verification are carried out.