消除静态负载误差的伺服阀,用来向谐振负载的伺服系统提供阻尼,这是压力反馈技术的进一步延伸。在压力流量控制(PQ)伺服阀中,压力反馈在静态时的作用与在动态时的作用一样,都正比于负载力。在静态负载下,压力反馈产生一个伺服回路误差,它必须用一个相应的位置信号进行补偿,其结果是伺服作动器明显的依从,这也就是作动器的位 Servovalves, which eliminate static load errors, are used to provide damping to servo systems with resonant loads, a further extension of pressure feedback technology. In pressure flow control (PQ) servo valves, pressure feedback is static at the same time as dynamic, proportional to the load force. Under static load, pressure feedback produces a servo loop error which must be compensated by a corresponding position signal, with the result that the servo actuator is clearly compliant, that is, the actuator bit