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CLC number: TH137

On-line Access: 2019-03-04

Received: 2018-09-03

Revision Accepted: 2019-01-29

Crosschecked: 2019-02-14

Cited: 0

Clicked: 6292

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Bin Zhang

https://orcid.org/0000-0002-2290-9915

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Journal of Zhejiang University SCIENCE A 2019 Vol.20 No.3 P.184-200

http://doi.org/10.1631/jzus.A1800504


Analysis of pressure and flow compound control characteristics of an independent metering hydraulic system based on a two-level fuzzy controller


Author(s):  Qi Zhong, Bin Zhang, Hui-ming Bao, Hao-cen Hong, Ji-en Ma, Yan Ren, Hua-yong Yang, Rong-fong Fung

Affiliation(s):  State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   zbzju@163.com

Key Words:  Independent metering system, Pressure and flow compound control, Calculation flow rate feedback, Fuzzy proportion integral differential (PID), Two-level closed-loop control


Qi Zhong, Bin Zhang, Hui-ming Bao, Hao-cen Hong, Ji-en Ma, Yan Ren, Hua-yong Yang, Rong-fong Fung. Analysis of pressure and flow compound control characteristics of an independent metering hydraulic system based on a two-level fuzzy controller[J]. Journal of Zhejiang University Science A, 2019, 20(3): 184-200.

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author="Qi Zhong, Bin Zhang, Hui-ming Bao, Hao-cen Hong, Ji-en Ma, Yan Ren, Hua-yong Yang, Rong-fong Fung",
journal="Journal of Zhejiang University Science A",
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pages="184-200",
year="2019",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1800504"
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%T Analysis of pressure and flow compound control characteristics of an independent metering hydraulic system based on a two-level fuzzy controller
%A Qi Zhong
%A Bin Zhang
%A Hui-ming Bao
%A Hao-cen Hong
%A Ji-en Ma
%A Yan Ren
%A Hua-yong Yang
%A Rong-fong Fung
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T1 - Analysis of pressure and flow compound control characteristics of an independent metering hydraulic system based on a two-level fuzzy controller
A1 - Qi Zhong
A1 - Bin Zhang
A1 - Hui-ming Bao
A1 - Hao-cen Hong
A1 - Ji-en Ma
A1 - Yan Ren
A1 - Hua-yong Yang
A1 - Rong-fong Fung
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1800504


Abstract: 
An independent metering valve control hydraulic system (IMVCHS) adopts two independent valves to separately control the meter-in and meter-out orifices. This structure increases the degree of freedom of the control, and improves its flexibility and energy-saving performance. In this study, an IMVCHS was established that applies a control system developed to research the pressure and flow compound control performance. A two-level fuzzy control algorithm based on the calculated flow rate feedback from the spool displacement was proposed to realize high precision flow control, and the two-level fuzzy control algorithm based on the pressure feedback was also adopted to enhance the pressure performance under a dynamic load. A simulation model was established, and its key parameters identified experimentally using the simulated load of a hydraulic bridge circuit. The experimental results show that the proposed flow controller has higher control accuracy with an error of less than 2%, and the flow adjustment time for 40 L/min step control is 320 ms. The pressure controller with a two-level closed-loop fuzzy algorithm can significantly improve these pressure dynamic and static performances, and achieve a step response time of less than 180 ms. Combining the pressure and flow controllers, the pressure and flow compound control of the IMVCHS is realized, and the capacity for coping with load fluctuations is also identified, with compound adjustment times of generally less than 200 ms, and occasionally less than 100 ms. This control system therefore achieves a good performance for pressure and flow compound control, and is able to widen the application of independent metering control technology.

This paper deals with independent metering valves control. According to the authors, the novelty in the work proposed it's the application of a fuzzy PID control to improve the pressure, flow and displacement controls of the valve. Indeed, the response of the system after the application of the suggested control that the authors show in the paper seems very good.

基于两级模糊控制器的独立负载液压系统的压力流量复合控制特性研究

目的:常规负载口独立控制研究多采用商业阀进行,因其阀芯位移控制器为封闭式结构,所以阀芯位移的动态特性难以调整,进而影响了系统的压力和流量控制性能. 本文旨在探讨负载口独立控制系统中阀芯位移特性对系统压力和流量控制的影响,并研究提高系统压力和流量控制性能的方法.
创新点:1. 设计基于两级模糊比例积分微分(PID)的压力和流量控制器; 2. 设计基于阀芯位移反馈的流量控制器; 3. 建立试验模型,成功实现液压系统高动态压力流量复合控制.
方法:1. 通过理论分析得到影响系统压力和流量的关键因素(公式(9)和(13)); 2. 提出位移控制为内环、压力和流量控制为外环的两级模糊PID控制算法,并开发相应的控制系统(图2~4); 3. 通过仿真和实验分析,验证本文提出的控制器所具有的阀芯位移、系统压力和流量的控制效果(图13~18).
结论:1. 两级模糊PID控制器具有较好的系统压力和流量控制效果; 2. 基于阀芯位移反馈的流量控制器具有较高的流量控制精度; 3. 运用本文设计的可编程控制系统进行液压系统的压力流量复合控制,稳定时间小于200 ms,使系统动态特性得到提高.

关键词:独立负载系统; 压力流量复合控制; 计算流量反馈; 模糊PID; 两级闭环控制

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1]Acuña-Bravo W, Canuto E, Agostani M, et al., 2017. Proportional electro-hydraulic valves: an embedded model control solution. Control Engineering Practice, 62:22-35.

[2]Book R, Goering C, 2001. Mimo adaptive control of a “smart” hydraulic system. International Journal of Smart Engineering System Design, 3:15-28.

[3]Borghi M, Zardin B, Pintore F, et al., 2014. Energy savings in the hydraulic circuit of agricultural tractors. Energy Procedia, 45:352-361.

[4]Cheng M, Xu B, Zhang JH, et al., 2017. Pump-based compensation for dynamic improvement of the electrohydraulic flow matching system. IEEE Transactions on Industrial Electronics, 64(4):2903-2913.

[5]Choi K, Seo J, Nam Y, et al., 2015. Energy-saving in excavators with application of independent metering valve. Journal of Mechanical Science and Technology, 29(1):387-395.

[6]Ding RQ, Xu B, Zhang JH, et al., 2016. Bumpless mode switch of independent metering fluid power system for mobile machinery. Automation in Construction, 68:52-64.

[7]Ding RQ, Xu B, Zhang JH, et al., 2017. Self-tuning pressure-feedback control by pole placement for vibration reduction of excavator with independent metering fluid power system. Mechanical Systems and Signal Processing, 92: 86-106.

[8]Eriksson B, 2007. Control Strategy for Energy Efficient Fluid Power Actuators: Utilizing Individual Metering. PhD Thesis, Linköping University, Linköping, Sweden.

[9]Eriksson B, Palmberg JO, 2011. Individual metering fluid power systems: challenges and opportunities. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 225(2):196-211.

[10]Ge L, Quan L, Zhang XG, et al., 2017. Efficiency improvement and evaluation of electric hydraulic excavator with speed and displacement variable pump. Energy Conversion and Management, 150:62-71.

[11]Hansen AH, Pedersen HC, Andersen TO, et al., 2011. Investigation of energy saving separate meter-in separate meter-out control strategies. Proceedings of the 12th Scandinavian International Conference on Fluid Power.

[12]Hu H, Zhang Q, 2003. Multi-function realization using an integrated programmable E/H control valve. Applied Engineering in Agriculture, 19(3):283-290.

[13]Jansson A, Palmberg JO, 1990. Separate controls of meter-in and meter-out orifices in mobile hydraulic systems. SAE Transactions, 99(2):377-383.

[14]Lantto B, Jansson A, Palmberg JO, 1989. A new concept of computer controlled electrohydraulic system: the p-q pump and valve control. Proceedings of the 2nd Bath International Fluid Power Workshop, p.99-114.

[15]Linjama M, Vilenius M, 2005. Energy-efficient motion control of a digital hydraulic joint actuator. Proceedings of the 6th JFPS International Symposium on Fluid Power, p.640-645.

[16]Linjama M, Paloniitty M, Tiainen L, et al., 2015. Mechatronic design of digital hydraulic micro valve package. Procedia Engineering, 106:97-107.

[17]Liu B, Quan L, Ge L, 2017. Research on the performance of hydraulic excavator boom based pressure and flow accordance control with independent metering circuit. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 231(5):901-913.

[18]Liu KL, Gao YJ, Tu ZH, et al., 2016. Energy-saving analysis of the independent metering system with pressure compensation for excavator’s manipulator. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 230(9):905-920.

[19]Liu S, Yao B, 2002. Energy-saving Control of Single-rod Hydraulic Cylinders with Programmable Valves and Improved Working Mode Selection. SAE Technical Paper 2002-01-1343, Purdue University, West Lafayette, USA.

[20]Liu S, Yao B, 2008. Coordinate control of energy saving programmable valves. IEEE Transactions on Control Systems Technology, 16(1):34-45.

[21]Opdenbosch P, Sadegh N, Book W, et al., 2011. Auto-calibration based control for independent metering of hydraulic actuators. Proceedings of 2011 IEEE International Conference on Robotics and Automation, p.153-158.

[22]Plummer AR, Vaughan ND, 1996. Robust adaptive control for hydraulic servosystems. Journal of Dynamic Systems, Measurement, and Control, 118(2):237-244.

[23]Sitte A, Weber J, 2013. Structural design of independent metering control systems. Proceedings of the 13th Scandinavian International Conference on Fluid Power, p.261-270.

[24]Sitte A, Beck B, Weber J, 2014. Design of independent metering control systems. Proceedings of the 9th International Fluid Power Conference.

[25]Wei JH, Zhang Q, Li MJ, et al., 2016. High-performance motion control of the hydraulic press based on an extended fuzzy disturbance observer. Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering, 230(9):1044-1061.

[26]Wu S, Jiao ZX, Yan L, et al., 2014. Development of a direct-drive servo valve with high-frequency voice coil motor and advanced digital controller. IEEE/ASME Transactions on Mechatronics, 19(3):932-942.

[27]Xu B, Ding RQ, Zhang JH, et al., 2015. Pump/valves coordinate control of the independent metering system for mobile machinery. Automation in Construction, 57:98-111.

[28]Yao B, DeBoer C, 2002. Energy-saving adaptive robust motion control of single-rod hydraulic cylinders with programmable valves. Proceedings of 2002 American Control Conference, p.4819-4824.

[29]Yao B, Liu S, 2002. Energy-saving control of hydraulic systems with novel programmable valves. Proceedings of the 4th World Congress on Intelligent Control and Automation, p.3219-3223.

[30]Yao J, Wang P, Cao XM, et al., 2018. Independent volume-in and volume-out control of an open circuit pump-controlled asymmetric cylinder system. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 19(3):203-210.

[31]Yuan QH, Lew JY, 2005. Modeling and control of two stage twin spool servo-valve for energy-saving. Proceedings of 2005 American Control Conference, p.4363-4368.

[32]Zhang JH, Wang D, Xu B, et al., 2018. Experimental and numerical investigation of flow forces in a seat valve using a damping sleeve with orifices. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 19(6):417-430.

[33]Zhong Q, Zhang B, Niu MJ, et al., 2017. Research on dynamic performance of independent metering control system. Proceedings of ASME/BATH 2017 Symposium on Fluid Power and Motion Control, p.V001T01A006.

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