较大密闭容腔的高精度水压控制

摘要

A water pressure control method was proposed based on electro-hydraulic pressure control in order to simulate the dynamic water pressure of the special equipment worked and test the performance of sealing device. A large closed volume water pressure control system, including the pressure transfer device and electro-hydraulic pressure control system, was designed. A "Fuzzy+PID" compound control strategy was proposed by analyzing the model of the water pressure control system. Experimental results show that the control range of the pressure is from 0. 1 Mpa to 10 Mpa, the steady-state error is +0. 04 Mpa, and the maximum slope trail is ±2 Mpa/s.%为了精确模拟水下特种设备工作环境中外部水压的动态变化过程,检验密封装置的密封性能,提出一种基于电液力控制的水压控制方法.设计并建立包含压力传递装置、电液力控制系统等部分的较大密闭容腔水压控制系统.通过分析系统的数学模型,提出“Fuzzy+ PID”复合控制策略进行水压控制.在建立的实验系统上进行实验研究.实验结果表明,水压可控范围为0.1～10 MPa,稳态误差为±0.04 MPa,压力无失真斜坡跟踪最大速率可达±2 MPa/s.