Energy-efficient hydraulic actuator position tracking using hydraulic system operation modes

Abstract

Efficient actuation is an important requirement in electromechanical designs. Although hydraulic actuators are used extensively when high-magnitude forces are present in heavy machinery, they are not very energy-efficient. This paper aims to increase the efficiency of electro-hydraulic servo systems after introducing a controllable supply pressure and six mode of operation for different condition. This process allows for the system to have very low energy consumption whenever its environmental force agrees with its position reference signal. For this purpose, first, the electrohydraulic servo systems is modeled and a robust H 1 controller is designed for each mode of operation. The resulting control system works based on applying each mode strategy at right time to save energy. The effectiveness of this method is tested by conducting experiments on a hydraulic test rig and presenting the experimental results.

Energy-Efficient Robust Control for Direct Drive and Energy Recuperation Hydraulic Servo System

“…Despite the fact that the aforementioned VSPC can greatly diminish the energy consumption, it does not work on gravitational potential energy recovery [27]. Numerous hydraulic equipments such as vibration test bench, energy regenerative suspension, fast forging machine, and hydraulic press have the characteristic of vertical reciprocating motion.…”

Research on the Dynamic Behaviors of the Jet System of Adaptive Fire-Fighting Monitors

“…It is difficult to explain some of the abnormal phenomena existing in real world dynamic tests, such as complex time-domain waveforms and numerous frequency domain peaks [26]. With the development of nonlinear differential equation solutions, such as the Runge-Kutta algorithm, scholars often use simulation methods to directly calculate the nonlinear system, describing the dynamics of the system more accurately [27][28][29]. The experimental method is mainly used to verify the results of systematic analysis and simulations, to verify the accuracy of nonlinear system analysis and simulation models [30,31].In this paper, the adaptive fire-fighting monitor was taken as the research object, and the influence of the nonlinear fluid spring force on the dynamic characteristics of the jet system was the focus of the study.…”