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兵工学报 ›› 2015, Vol. 36 ›› Issue (1): 163-174.doi: 10.3969/j.issn.1000-1093.2015.01.024

• 论文 • 上一篇    下一篇

高速开关阀流量非线性分析及补偿控制验证

刘志浩, 高钦和, 管文良   

  1. (第二炮兵工程大学 兵器发射理论与技术国家重点学科实验室, 陕西 西安 710025)
  • 收稿日期:2014-03-31 修回日期:2014-03-31 上线日期:2015-03-14
  • 作者简介:刘志浩(1989—),男,博士研究生
  • 基金资助:
    国家自然科学基金项目(51475462)

Flow Nonlinear Analysis and Compensation Control Validation for High-speed On-off Valve

LIU Zhi-hao, GAO Qin-he, GUAN Wen-liang   

  1. (National Key Discipline Laboratory of Armament Launch Theory & Technology,the Second Artillery Engineering University, Xi’an 710025, Shaanxi, China)
  • Received:2014-03-31 Revised:2014-03-31 Online:2015-03-14

摘要: 针对高速开关阀流量控制中存在的死区、饱和区和非线性区问题,在对比脉宽调制(PWM)控制及传统PWM补偿控制的基础上,提出了两种非线性控制方法,基于死区和饱和区分段补偿的PWM控制和脉宽调制-脉频调制(PWM-PFM)控制。基于这两种非线性控制方法,分析高速开关阀的流量特性,并搭建了高速开关阀控制液压缸位置回路,从仿真和实验的角度,对比分析高速开关阀在PWM控制、传统PWM补偿和文中提到的两种非线性控制下的液压缸位置控制特性。研究结果表明:两种非线性控制方法分别从占空比和工作频率的角度对高速开关阀的死区、饱和区和非线性区进行补偿,使高速开关阀在0%~100%占空比范围内流量线性化;在仿真与实验验证中能够有效解决由于流量控制死区和饱和区所造成的液压缸启动和到位过程中误差较大的问题。

关键词: 机械学, 高速开关阀, 流量特性, 非线性控制, 脉宽调制控制, 脉频调制控制

Abstract: The nonlinear control methods of compensated pulse width modulation(PWM) control based on the dead and saturated zones and PWM-PFM(pulse frequency modulation) control are presented for the dead, saturated and non-linear zones in the flow control of high-speed on-off valve, which are compared with the PWM control and the traditional PWM control. The flow characteristic of HSV with the nonlinear control is analyzed and simulated, and a hydraulic loop controlled by HSV is set up to verify the nonlinear control by simulation and experiment. The result shows that the nonlinear control method compensates the dead, saturated and nonlinear zones in the terms of duty ratio and frequency and can linearizes the flow with the duty ratio of 0%~100%; the large tracking error resulting from the dead zone and saturated zone is avoided effectively in simulation and experiment.

Key words: mechanics, high-speed on-off valve, flow characteristic, nonlinear control, pulse width modulation control, pulse frequency modulation control

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