本文選題：機械工程 + 液壓動力源�。� 參考：《長安大學學報(自然科學版)》2017年05期

【摘要】：針對簡單比例-積分-微分(PID)控制在液壓系統(tǒng)控制中出現(xiàn)嚴重滯后、不易調節(jié)等問題,提出采用輸入前饋-反饋復合補償控制策略實現(xiàn)液壓動力源典型工況下流量的跟蹤控制,以控制執(zhí)行機構速度。該方法以變轉速機電液系統(tǒng)試驗平臺為基礎進行建模,深入分析液壓動力源機電液參數(shù)之間的耦合關系,建立整個試驗平臺的輸入前饋-反饋復合補償控制模型,以實現(xiàn)液壓動力源典型工況(階躍、斜坡、正弦動態(tài)變化)下流量的跟蹤控制。研究結果表明:與簡單PID控制相比,目標流量階躍變化時,復合控制響應時間減小約40%,穩(wěn)態(tài)誤差減小約33%;目標流量斜坡變化時,復合控制響應時間減小約44%,動態(tài)誤差減小約46%;目標流量正弦變化時,響應時間和動態(tài)誤差減小至簡單PID反饋控制的30%,系統(tǒng)的動態(tài)響應特性得到大幅度提升。輸入前饋-反饋復合補償控制算法簡單、可靠性高,解決了傳統(tǒng)液壓調速出現(xiàn)的滯后、響應慢、不易調節(jié)等問題。
[Abstract]:Aiming at the problems of the simple proportional integral-differential PID-control in the control of hydraulic system, such as serious lag and difficulty in adjusting, this paper puts forward a hybrid compensation strategy of input feedforward and feedback to realize the flow tracking control under typical working conditions of hydraulic power source. To control the speed of the actuator. Based on the test platform of electromechanical hydraulic system with variable rotational speed, the coupling relationship between electromechanical and hydraulic parameters of hydraulic power source is deeply analyzed, and the input feedforward feedback compound compensation control model of the whole test platform is established. In order to realize the flow tracking control under typical working conditions (step, slope, sinusoidal dynamic change) of hydraulic power source. The results show that compared with simple PID control, the response time of composite control is reduced by about 40 and the steady-state error is reduced by about 33 when the target flow step changes, and when the target flow slope changes, The response time and dynamic error of the composite control are reduced by about 44 and 46. when the sinusoidal flow rate of the target is changed, the response time and dynamic error are reduced to 30% of the simple PID feedback control, and the dynamic response characteristics of the system are greatly improved. The input feedforward and feedback compound compensation control algorithm is simple and reliable, which solves the problems of lag, slow response and difficult adjustment of traditional hydraulic speed regulation.
【作者單位】： 西安建筑科技大學機電工程學院;
【基金】：國家自然科學基金項目(51675399) 陜西省教育廳專項科研計劃項目(15JK1412) 西安建筑科技大學基礎研究基金項目(JC1608)
【分類號】：TH137

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本文編號：1929799