• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2025, Vol. 62 ›› Issue (6): 400-408.doi: 10.3901/JME.260203

• 交叉与前沿 • 上一篇    

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基于压力闭环反馈与转速补偿的电液动力源复合压力控制方法研究

杨飞1,2,3, 赵磊2, 葛磊2, 王晓虎3, 权龙1, 熊晓燕2   

  1. 1. 太原理工大学机械工程学院 太原 030024;
    2. 太原理工大学机器人科学与工程学院 太原 030024;
    3. 潍柴液压传动有限公司 潍坊 261000
  • 收稿日期:2025-05-20 修回日期:2025-12-17 发布日期:2026-05-12
  • 作者简介:杨飞,男,1986年出生,高级工程师,博士研究生。主要研究方向为电液传动节能降耗。E-mail:584365905@qq.com
    葛磊(通信作者),男,1987年出生,研究员,博士研究生导师。主要研究方向为复杂机电液装备数字样机、整机系统绿色低碳运行。E-mail:415597710@qq.com
  • 基金资助:
    国家重点研发计划资助项目(2023YFB3406602)。

Composite Pressure Control Method of Electro Hydraulic Power Source Based on Pressure Closed Loop Feedback and Speed Compensation

YANG Fei1,2,3, ZHAO Lei2, GE Lei2, WANG Xiaohu3, QUAN Long1, XIONG Xiaoyan2   

  1. 1. College of Mechanical Engineering, Taiyuan University of Technology, Taiyuan 030024;
    2. College of Robotics Science and Engineering, Taiyuan University of Technology, Taiyuan 030024;
    3. Weichai Hydraulic Transmission Co., Ltd., Weifang 261000
  • Received:2025-05-20 Revised:2025-12-17 Published:2026-05-12

摘要: 采用伺服电机通过控制转矩驱动定量泵实现压力控制,与变转速控制压力相比,具有更快的动态响应。在基于转矩控制的电液动力源中,通常需要依赖压力传感器闭环反馈来维持输出压力精度。一旦传感器失效,转矩与压力之间的非线性映射关系,将会使系统出现较大的压力控制偏差。为此,提出一种融合压力闭环反馈和转速补偿的复合压力控制方法,正常压力控制时,通过压力闭环控制压力;当压力传感器失效时,利用伺服电机自带的转速反馈实施补偿控制,维持压力控制精度。通过理论分析和试验验证,结果表明,所提出的方案,能够实现高精度压力控制;当压力传感器发生故障时,所提方案中的转速补偿控制也能有效维持动力源输出压力精度,控制偏差从20%降低至约2%。

关键词: 电液动力源, 转矩控制, 压力控制, 转速补偿

Abstract: Pressure control is achieved by driving a fixed-displacement pump via servo motor torque control, offering faster dynamic response compared to variable speed pressure control. In torque-controlled electro-hydraulic power sources, reliance on pressure sensor feedback is typically required within a closed loop to maintain output pressure accuracy. Failure of the sensor causes significant pressure control deviation due to the nonlinear mapping relationship between torque and pressure. To address this, a compound pressure control method integrating pressure closed-loop feedback and speed compensation is proposed. During normal operation, pressure is regulated through the pressure closed loop. Upon pressure sensor failure, compensation control is implemented utilizing the servo motor's built-in speed feedback to sustain pressure control accuracy. Theoretical analysis and experimental validation demonstrate that the proposed scheme enables high-precision pressure control. When a pressure sensor fault occurs, the speed compensation control within the scheme effectively maintains the power source's output pressure accuracy, reducing the control deviation from 20% to approximately 2%.

Key words: electro-hydraulic power source, torque control, pressure control, speed compensation

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