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首页> 外文期刊>Journal of Mechanical Engineering >Dynamic Simulation of Variable-Speed Valve-Controlled-Motor Drive System with a Power-Assisted Device
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Dynamic Simulation of Variable-Speed Valve-Controlled-Motor Drive System with a Power-Assisted Device

机译：动力辅助装置的变速阀控电机驱动系统的动态仿真

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摘要

The variable-speed electrohydraulic drive has been applied in hydraulic machines having power matching means. However, further development has been restricted by its slow response and poor low-speed behavior. Owing to these disadvantages, a novel drive principle comprising a variable-speed valve-controlled-motor drive with an accumulator-based power assisted unit (PAU) is proposed. The PAU is an energy assisting and recycling device, which can release or absorb hydraulic energy according to the system's requirements. With the aid of PAU, the proposed drive is expected to improve response and control precision compared with the variable-speed drive. The proposed drive principle system is a multi-input-multi-output (MIMO) complicated nonlinear system with time-varying, which increases the control difficulty. A mathematical model of the proposed drive was first derived then a hybrid control strategy was presented. The dynamic simulations of three traditional drives and the novel one were performed using AMESim-Simulink co-simulation models. The four drives have been tested using three common variable-load disturbances. Comparisons of simulation results show that the proposed drive principle system demonstrates a good dynamic performance, which can not only achieve the expected energy saving target, but also significantly improve the response and control precision over the existing variable-speed drive system.
机译：变速电动液压驱动器已经应用于具有动力匹配装置的液压机中。但是，其缓慢的响应和不良的低速行为限制了进一步的发展。由于这些缺点，提出了一种新颖的驱动原理，其包括带有基于蓄能器的动力辅助单元（PAU）的变速阀控电动机驱动器。 PAU是一种能量辅助和回收设备，可以根据系统要求释放或吸收液压能。借助PAU，与变速驱动器相比，该驱动器有望改善响应和控制精度。提出的驱动原理系统是具有时变的多输入多输出（MIMO）复杂非线性系统，增加了控制难度。首先推导提出的驱动器的数学模型，然后提出一种混合控制策略。使用AMESim-Simulink协同仿真模型对三种传统驱动器和新型驱动器进行了动态仿真。已使用三种常见的可变负载干扰对这四个驱动器进行了测试。仿真结果比较表明，所提出的驱动原理系统具有良好的动态性能，不仅可以达到预期的节能目标，而且与现有的变速驱动系统相比，可以显着提高响应速度和控制精度。

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