分辨率是电液伺服阀的重要性能参数之一,其定义为:使阀的控制流量发生变化的控制电流最小增量。由于其数值一般随控制电流大小和停留时间长短而变化,故取其最大值,并表示为额定电流的百分数。分辨率过大会引起系统极限环振荡和过大的静态误差。一般规定分辨率不得大于额定电流的1%,较高精度的位置伺服系统则要求它不大于0.5%甚至更小。 Resolution is one of the most important performance parameters for electrohydraulic servo valves and is defined as the minimum increment of control current that changes the control flow of the valve. Because of its value generally with the size of the control current and the length of stay change, so take the maximum value, and expressed as a percentage of the rated current. Excessive resolution of the system caused the system to limit ring oscillation and excessive static error. General provisions of the resolution shall not be greater than 1% of the rated current, higher precision position servo system requires it not more than 0.5% or less.