增量式数字阀控缸位置控制系统动态性能分析及实验研究

液压伺服控制系统具有功重比大、精度高和响应快等优点，在工业、农业、轻纺织业和交通运输中应用广泛。液压伺服控制系统多采用伺服阀和比例阀作为控制元件，但伺服阀和比例阀的结构复杂，造价高，对油液质量和清洁度要求高。而增量式数字阀具有结构简单、成本低、抗污染能力强且维护方便等优势，在液压伺服控制系统中具有较好的应用前景。本文以增量式数字阀控缸位置控制系统为研究对象，首先，对增量式数字阀的结构和工作原理进行分析，建立其位置控制系统数学模型，并基于MATLAB/Simulink仿真平台搭建了其位置控制系统仿真模型；然后，利用仿真分析典型输入信号和不同结构参数下增量式数字阀控缸位置控制系统的动态性能；最后，搭建增量式数字阀控缸位置控制系统实验平台，测试了典型输入信号和不同结构参数下的动态性能。通过仿真与实验相结合，验证了增量式数字阀原理的可行性，分析了增量式数字阀控缸位置控制系统的动态响应能力，并对影响其动态响应能力的因素进行分析，为增量式数字阀的后续结构改进和动态性能优化提供了理论和实验基础。.

Analysis of Dynamic Performance and Experimental Study of Position Control System for an Incremental Digital Valve-controlled Cylinder

Hydraulic servo control systems mostly adopt servo valve and proportional valve as control components, which has the advantages of high power to weight ratio, high accuracy and fast response, and is widely used in industry, agriculture, light textile industry and transportation. However, the structure of servo valve and proportional valve is complex, the cost is high, and the quality of oil are required. Adopting incremental digital valve with the advantages of simple structure, low cost, strong anti-pollution ability and convenient maintenance as the control component of servo control system has a wide application prospect. This paper took the incremental digital valve controlled cylinder position control system as research object. First, based on the structure and the operating principle of the incremental digital valve, the mathematical model of the position control system was established. And based on MATLAB/Simulink, the simulation model of the position control system was established. Then, the dynamic performance of the incremental digital valve controlled cylinder position control system with different input signals and structural parameters were compared and analyzed through simulation. Finally, the incremental digital valve-controlled cylinder position control system experiment platform was built to test the dynamic performance under different working conditions. Through combining simulation with experiment, the feasibility of incremental digital valve principle was verified, the dynamic response ability of the incremental digital valve control cylinder position control system under different conditions was analysis, and the main factors influencing the dynamic response ability were found, which provides the theoretical and experimental basis for the structure improvement of incremental digital valve and the dynamic performance optimization.