Integrated energy saving and position tracking controller for the hydraulic lifting servo system

Weiping Wang; Chun Cheng; Wei Zou; Xiangning Lu

doi:10.1016/j.isatra.2021.02.033

Integrated energy saving and position tracking controller for the hydraulic lifting servo system

ISA Trans. 2022 Jan:119:196-207. doi: 10.1016/j.isatra.2021.02.033. Epub 2021 Feb 22.

Authors

Weiping Wang¹, Chun Cheng², Wei Zou², Xiangning Lu²

Affiliations

¹ School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou 221116, China; School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China. Electronic address: kuangdaxiao5@cumt.edu.cn.
² School of Mechatronic Engineering, Jiangsu Normal University, Xuzhou 221116, China.

PMID: 33676738
DOI: 10.1016/j.isatra.2021.02.033

Abstract

High energy efficiency and tracking accuracy are both vital for hydraulic lifting servo systems. However, the appropriate hardware configuration and its corresponding nonlinear controller is always a problem to be solved. To address this multi-objective task, an integrated energy-saving and position tracking controller is developed. Specifically, to reduce the substantial energy dissipation, a system configuration referring to the structure of the three-position-six-way valve is proposed. To ensure accurate tracking performance, a hybrid observer-based output feedback controller is developed. By doing so, the function of flow regeneration and the property of flow matching are achieved, and the tracking accuracy is guaranteed by using only position signal. To validate the effectiveness of the proposed method, a common Lyapunov function is used to prove the stability of the multi-model system, and case studies are conducted to demonstrate the system performance.

Keywords: Energy saving; Hybrid observer; Hydraulic servo system; Position tracking.