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浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (11): 2093-2099    DOI: 10.3785/j.issn.1008973X.2010.11.009
    
Research on control characteristic and compensation of
water hydraulic proportional pressure relief valve
ZHANG Zeng-meng1, 2, ZHOU Hua1, CHEN Ying-long1, GAO Yuan-an3
1.State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;
2.Institute of Fluid Power Transmission and Control, Dalian Maritime University, Dalian 116026, China;
3.Jiujiang Branch of 707 Research Institute of CSIC, Jiujiang 332007, China
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Abstract  

For the purpose of improving control performance of water hydraulic proportional valve, the PDBV type water hydraulic proportional pressure relief valve of TIEFENBACH was investigated through structure analysis and experiment. The experimental results of static control performance show that the hysteresis and dead band are large under open-loop control due to friction, steady flow force and hysteresis of electromagnetic actuator, etc. As a result, the closed-loop control is unstable. Aiming at decrease of hysteresis and dead band, the sectional linear inverse model of valve hysteresis was built based on least-square linear regression. With the experimental results, the hysteresis and dead band are greatly decreased through feed-forward static compensation. However, large overshoot and great pressure impact are induced. For the reason that linear controllable range among the input signal increase is much less than the decrease, the pulse feedback of the inlet pressure is applied on the increase side. It is shown that the overshoot and pressure impact are eliminated by a large margin. This contributes to improve the valve control performance and further extend the application of water hydraulic pressure proportional control.

Published: 23 December 2010
CLC:  TH 137.52  
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Cite this article:

ZHANG Zeng-meng, ZHOU Hua, CHEN Ying-long, GAO Yuan-an. Research on control characteristic and compensation of
water hydraulic proportional pressure relief valve. J4, 2010, 44(11): 2093-2099.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008973X.2010.11.009     OR     http://www.zjujournals.com/eng/Y2010/V44/I11/2093


纯水比例溢流阀控制特性与补偿方法的研究

为了改善纯水比例阀的静动态控制性能,以TIEFENBACH的PDBV型三级座式纯水比例溢流阀为对象,研究阀的控制特性与补偿方法.阀的结构分析和静态比例调节特性试验表明,阀的开环静态特性滞环和死区大,线性可控性差；直接闭环控制的稳定性差,极易产生入口压力振荡.根据阀的开环静态特性试验结果,基于线性拟合建立了分段线性化的迟滞逆模型,并用于阀的前馈控制回路.阀控制特性的补偿效果试验结果表明：阀的前馈静态迟滞补偿大大减小了滞环和死区,提高了线性度,但是在正阶跃响应下易产生大幅超调和压力冲击.在直接前馈补偿中加入单边脉冲反馈的控制方式,可以基本消除超调现象.迟滞补偿对阀的非线性的有效改善,提高阀的控制性能,进一步扩大了水液压比例压力控制技术的应用．

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