Electrohydraulic proportional position and pressure loading control utilizing a state perception and processing method

Jinheng Gu; Cong Shen; Cong Zhang; Honglin Wu; Dong Wei; Lei Si; Zhongbin Wang

doi:10.1016/j.isatra.2023.10.007

Electrohydraulic proportional position and pressure loading control utilizing a state perception and processing method

ISA Trans. 2023 Dec:143:647-665. doi: 10.1016/j.isatra.2023.10.007. Epub 2023 Oct 10.

Authors

Jinheng Gu¹, Cong Shen¹, Cong Zhang¹, Honglin Wu¹, Dong Wei¹, Lei Si², Zhongbin Wang³

Affiliations

¹ School of Mechatronic Engineering, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou, China; Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou, China.
² School of Mechatronic Engineering, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou, China; Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou, China. Electronic address: sileicool@163.com.
³ School of Mechatronic Engineering, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou, China; Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment, China University of Mining and Technology, No. 1 Daxue Road, Xuzhou, China. Electronic address: wangzbpaper@126.com.

PMID: 37833173
DOI: 10.1016/j.isatra.2023.10.007

Abstract

A new multifunctional proportional control triaxial stress loading apparatus is presented in this study, which can apply an output force on coal rock to simulate the conditions of triaxial stress loading, aiming at solving the problems of excessive consideration of static indices in the design and the incompleteness of the simulation and test verification system for the test parts at the performance analysis stage. This apparatus mainly combines the configuration of a triaxial stress loading system which can meet the stress loading requirements under different operating conditions, with the effective integration of multiple pressure loading operations based on the electrohydraulic proportional control method. In this context, a pressure and position combined control strategy based on the sliding mode is proposed to control the vertical and longitudinal loading hydraulic cylinders. Then, a co-simulation mode including the triaxial stress loading hydraulic system is established to verify the control strategy, system response characteristics and selection of the controller parameters. Furthermore, a multifunctional stress loading experimental platform is developed, and the stress loading characteristics with the proposed strategy are tested and analyzed. The results show that the triaxial stress loading hydraulic system can meet the response characteristics, the fluctuating deviation of the constant loading test can be restricted to 8.5%, the tracking error of the variable loading test is small, the minimum response time of instantaneous loading can reach 2.8 s, and the stress loading effect is noticeable. The experimental platform fully indicates that the stress loading system with the state perception and processing method as the core can meet a variety of verification indices of constant, variable and instantaneous loading tests. This research provides technical support for the smooth, synchronous control and intelligent operation of various types of hydraulic actuator machines.

Keywords: Electrohydraulic proportional control; Pressure and position combined control strategy; Tracking error; Triaxial stress loading apparatus.