摘要
针对正开口2D数字伺服阀静动态特性可能存在不稳定这一问题,分析了2D数字伺服阀的结构、工作原理及抗污染能力,并在此基础上设计并搭建了测试实验平台,在额定压力21 MPa下,对6只额定流量为50 L/min的通径6 mm正开口2D数字伺服阀进行了静动态特性实验研究。研究结果表明:6只6 mm通径正开口2D数字伺服阀滞环均小于5%,不对称度均小于10%,非线性度均小于7.5%,完全达到伺服阀静态特性的标准值;-3 dB处幅频宽至少可达110 Hz(25%额定流量),阶跃响应上升时间至少可达10.8 ms;6只6 mm通径正开口2D数字伺服阀均具有较理想的静、动态特性和良好的加工一致性,不存在静、动态特性不稳定问题。
Aiming at possible instability of static and dynamic characteristics of the open center 2D digital servo valve,the structure,working principle and anti-pollution ability of the open center 2D digital servo valve were analyzed.On this basis,a test experiment platform was designed and built.Under the rated pressure 21 MPa,experimental study about the static and dynamic characteristics of six [？]6 mm open center 2D digital servo valves whose nominal flow were 50 L/min had been done.The results indicate that the six valves fully meet the standard values ？？of the static characteristics of the servo valve.Their hysteresis loops are all less than 5%,degree of asymmetrys are all less than 10% and non-linearitys are all less than 7.5%.Their frequency responses are not less than？110 Hz at-3 dB of 25% rated flow and rising time of step response is less than 10.8 ms.So,six [？]6 mm open center 2D digital servo valves have excellent static and dynamic characteristics and good processing consistency.Instability about static and dynamic characteristics of the open center 2D digital servo valves are nonexistent.
出处
《机电工程》
CAS
2013年第5期562-564,635,共4页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(50975258)
浙江省大学生科技创新活动计划(新苗人才计划)资助项目(2012R403073)
关键词
2D阀
伺服阀
数字控制
静动态特性
two-dimensional valve
servo valve
digital control
static and dynamic characteristics
