当正弦电流输入进入空载工作状态时,阀的响应能够通过相当于图16的简图设备确定。在这个设备里,阀的输出流量被供给到一个低质量、低摩擦力的作动筒上。作动筒的运动通过电传感器检测。作动筒的设计应该是这样的,以致于在所关心的频率范围内(通常达每秒几百周),出现的动态差压的变化忽略不计。用这种方法表现真正的空载阀的动特 When the sinusoidal current input into the no-load operation, the valve response can be determined by the equivalent of Figure 16 schematic device. In this device, the output of the valve is supplied to a low-mass, low-friction actuator. The movement of the actuator is detected by the electrical sensor. The actuator design should be such that the dynamic pressure changes that occur are negligible over the frequency range of interest (typically up to several hundred cycles per second). Use this method to show the true no-load valve dynamic characteristics