| 高速开关阀的复合PWM控制策略分析与优化 |
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| 引用本文： | 高强,朱玉川,罗樟,陈晓明. 高速开关阀的复合PWM控制策略分析与优化[J]. 北京航空航天大学学报, 2019, 45(6): 1129-1136. DOI: 10.13700/j.bh.1001-5965.2018.0565 |
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| 作者姓名： | 高强 朱玉川 罗樟 陈晓明 |
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| 作者单位： | 南京航空航天大学 机电学院,南京,210016;南京航空航天大学 机电学院,南京,210016;南京航空航天大学 机电学院,南京,210016;南京航空航天大学 机电学院,南京,210016 |
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| 基金项目： | 国家自然科学基金51575258江苏高校“青蓝工程” |
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| 摘 要： | 针对单一PWM控制的高速开关阀（HSV）存在响应慢和功耗大的问题，从信号产生机理出发，提出了一种复合PWM控制策略，该复合PWM由基准PWM、激励PWM、高频PWM及反向PWM组成。首先，给出复合PWM的作用机制与工作原理；其次，通过仿真分析了激励PWM、高频PWM及反向PWM的占空比在不同工况下对高速开关阀性能的影响规律；最后，分别为激励PWM、高频PWM及反向PWM的占空比设计了相应的基于状态量反馈的闭环控制器。结果表明:与单一PWM控制相比，所提出的复合PWM控制器可以有效减少线圈的功耗和阀芯的关闭时间，线圈电流在阀芯最大开口维持阶段降低约80%，阀芯关闭时间减少约62.5%。
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| 关 键 词： | 高速开关阀(HSV) 复合PWM 动态特性 功耗 滑模观测器 |
| 收稿时间： | 2018-09-27 |
Analysis and optimization on compound PWM control strategy of high-speed on/off valve |
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| Affiliation: | College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| Abstract: | Aimed at slow response and high-power consumption of high-speed on/off valve (HSV) controlled by single PWM signal, a compound PWM control strategy proposed from the point of view of the digital signal generation mechanism, which consists of reference PWM, excitation PWM, high-frequency PWM and reverse PWM. First, mechanism and working principle of compound PWM control strategy are given. Next, the influence rules of duty cycle of excitation PWM, high-frequency PWM and reverse PWM signals on performance of HSV are studied by simulation under different boundary conditions. Finally, the closed-loop controllers of these PWM's duty cycle are designed based on state variable feedback. Simulation results show that the proposed compound PWM controller can reduce power consumption and closing time of HSV effectively. The coil current is reduced by 80% at maximum position of the ball valve, and closing time of HSV is shortened by 62.5% approximately, compared with single PWM control strategy. |
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