This paper gives a design of electro hydraulic servo control system for testing shear intensity of brakes, explaining its working principle and constitution of hardware and software.

设计了一套测试制动片粘结强度的电液伺服控制系统，介绍了系统的原理、组成和硬件、软件设计。

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And old-fashioned hydraulic test machine and electronic universal testing machine servo control system of the computer, automatic acquisition and data processing system transformation.

并对老式液压试验机及电子万能试验机进行微机伺服控制系统改造，自动采集及数据处理系统改造。

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The delay estimation and compensation are key problems in real-time substructure testing because the delay of servo-hydraulic loading system may induce failure due to experimental instability.

在实时子结构试验中，液压伺服加载系统的时滞可能导致试验因丧失稳定而失败，因而时滞估计和补偿是该类试验的关键问题之一。

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