An integral terminal sliding mode control scheme for speed control system using a double-variable hydraulic transformer

Wei Shen; Jiehao Wang

doi:10.1016/j.isatra.2019.08.068

An integral terminal sliding mode control scheme for speed control system using a double-variable hydraulic transformer

ISA Trans. 2022 May:124:386-394. doi: 10.1016/j.isatra.2019.08.068. Epub 2019 Sep 23.

Authors

Wei Shen¹, Jiehao Wang²

Affiliations

¹ Department of Mechatronics Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310000, China. Electronic address: shenwei@usst.edu.cn.
² Department of Mechatronics Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.

PMID: 31648794
DOI: 10.1016/j.isatra.2019.08.068

Abstract

In recent years, with the aggravation of energy crisis and environmental pollution, the Common Pressure Rail (CPR) system with great energy saving potential has become a research hotspot in the hydraulic research area. However, as the key component of CPR system, hydraulic transformers have the problems of low efficiency and poor control effect, which limit its practical application. The main contribution of the paper is to propose a new type of double-variable hydraulic transformer (DVHT) and address the control issue. As the displacement is adjustable, DVHT can achieve pressure regulation while maintaining the cylinder speed in the high-efficiency area. According to the system characteristics, a new control strategy is designed for the two control variables, and an adaptive integral terminal sliding mode controller is proposed to guarantee the robustness of the system. The simulation results prove the feasibility of the DVHT and show that the control method can achieve multitasking control and effectively improve the control effect.

Keywords: Double-variable hydraulic transformer; Fuzzy system; RBF neural network; Sliding mode control.