The results prove that Neural-PID can solve the problem of the electro-hydraulic position servo system and it is a practical and feasible control tactic.

实践证明，神经PID控制策略能较好地解决电液位置伺服系统存在的问题，是一种实用可行的控制策略。

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Servo-drive of virtual-axis machine is always a problem in control theory and application technology because it has strong coupling.

虚拟轴数控机床的各伺服驱动回路由于轴间强耦合的影响，在国内外，一直是控制理论和实现技术方面的一个难题。

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The parameter identification of joining stiffness of rudder hydraulic servo mechanism can be done by using the direct method of characteristic equation anti problem.

应用特征方程反问题的直接方法对舵面-液压伺服机构连接刚度参数进行了辨识。

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