Affiliation:
1. College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, China
2. College of Transportation, Shandong University of Science and Technology, Qingdao, China
Abstract
Pilot-operated electro-hydraulic proportional directional valve is a key hydraulic component to control the motion of large power equipment such as construction machinery and agricultural equipment. The control accuracy and response speed of the valve control element are very important to the performance of the hydraulic system. In this paper, control strategies for dead-zone control and valve control systems are reviewed. In order to eliminate the dead-zone of pilot-operated proportional valve control, the current control schemes for dead-zone detection and dead-zone compensation are summarized, and the control schemes are evaluated. The proportional–integral–derivative-related control, nonlinear control, and robust control of the pilot-operated electro-hydraulic proportional directional valve control system are reviewed, the relationship between the control strategies is analyzed, and the different control algorithms are evaluated. The shortcomings of the research program are analyzed, and the corresponding solutions are proposed. Based on the current research, future research progresses for eliminating the control dead-zone and optimizing control strategies are presented.
Funder
The Special Project of the Ministry of Rural Agriculture
The Major Innovation Project of Shandong Province
Key Science and Technology Innovation Project of Shandong Province
Subject
Industrial and Manufacturing Engineering,Mechanical Engineering