主动调压式CPR环境下的液压系统节能机理及其控制研究

在当前节能减排的大背景下，具备较大节能潜力的Common Pressure Rail(压力共轨，简称CPR)环境下的液压系统理论因没有综合分析各元件的实时效率而制约了系统整体效率的大幅提升，同时因缺乏从系统本质机理角度提高控制品质的基础研究而导致执行元件的性能无法满足大规模推广的要求。本项目提出一种“主动调压式CPR”的概念，扩展传统CPR中要求高压管路恒压的条件，将压力变化限制在有限域内，依据节能型控制策略来主动调整高压管路压力使各元件处于最优效率组合运行状态而提高整体效率。此外，针对该系统存在着参数不确定性、干扰变化大以及本质非线性问题，采用多学科交叉的方法建立“机电液”本构模型，并研究结合自适应和鲁棒控制等智能控制的先进算法，抑制参数摄动等外干扰的影响，实现系统高效率的同时提高控制性能。获得的研究成果将丰富CPR环境下的液压系统的基础理论，为液压系统节能技术的深入推广探索新的途径。

Efficiency enhancement of the hydraulic system based on CPR(Common Pressure Rail) is restricted since it is lack of considering of the efficiency of each element from the whole view, though the CPR has a huge potential from the energy saving aspect. Moreover, the large-scale applications of the system are also restricted because it is lack of the fundamental research results of control strategy about how to enhance the control performance of actuators to satisfy the practical requirement. In this project, a concept adopted “Active regulating common pressure rail” is presented, whose strategy is to set a finite field by regulating the main pump actively instead of keeping the constant pressure of the high pressure line. Following the energy saving control strategy, the system can guarantee the high efficiency contributed by the actuator group which is working on the optimal combination of efficiency. To overcome the difficulties caused by the inevitable parameter uncertainties, changing load and input saturation, a new control strategy combining with adaptive and robust control algorithm is proposed to enhance the control performance of actuators based on the constitutive model which includes mechanical, electric and hydraulic systems by using multidisciplinary approach. Hence the high efficient advantage of the hydraulic system can be obtained without reducing the control performance. It is appropriate for enriching the fundamental research of the hydraulic system based on CPR, and developing a new approach for the energy saving technique in hydraulic system.