双阀并联控制在船舶舵机电液负载模拟器多余力抑制中的研究

由于船舶舵机电液负载模拟器所模拟的水动力载荷很大,要求加载系统不仅要有很大的出力而且具有很大的负载流量。为满足系统大流量的要求而又能有效抑制被动加载时的多余力,提出了由高响应大流量三级电液流量伺服阀和p-qv伺服阀组成的双阀并联控制方案。通过对船舶舵机电液负载模拟器的建模,p-qv伺服阀模型的分析简化,设计了双阀并联控制实时控制系统。对比双阀并联控制和单流量伺服阀控制的试验曲线,可以看出被动加载时双阀并联控制比单流量伺服阀控制可以更有效地抑制舵机系统启停和换向时的多余力,明显改善系统动态加载性能。

STUDY ON ELIMINATING THE SUPERFLUOUS FORCE OF MARINE ELECTROHYDRAULIC LOAD SIMULATOR APPLIED WITH DUAL-VALVE PARALLEL CONNECTED CONTROL

The marine rudder electrohydraulic load simulator system has not only big output force but also large flow because it can simulate enormous hydraulic-dynamic load. In order to demand for meeting large flow and eliminate the superfluous force, the dual-valve parallel connected control scheme is proposed. The dual-valve consisted of large flow 3-stage high-response flow servo valve and p-qv servo valve. The marine rudder electrohydraulic load simulator is modeled. The model of p-qv servo valve is analyzed and simplified. The dual-valve real-time control system is proposed. Compared with the experimental curves of dual-valve parallel connected control and single flow servo valve control, it is indicated that the former can more effectively eliminate superfluous force and improve dynamic load performance index than the latter when the rudder system starts, stops and changes direction.