属于后者的是气动乘法元件和以长导管构成的近似纯滞后元件。
For the latter, a pneumatic multiplier and an approximate dead-time element using long tu...
推导出液压伺服系统各元件的传递函数，并由此建立起位置伺服系统的数学模型，设计出超前—滞后校正控制器。
Derivates the transfer function of elements of the servo system, constructed the mathematic model of the position servo system and advance-lag revising controller was designed.
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