Force control of electro-hydrostatic actuator using pressure control considering torque efficiency

Kota, I; Umeda, Kodai; Tsuda, Kazuki; Sakaino, Sho; Tsuji, Toshiaki

doi:10.1109/amc.2019.8371123

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2020

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“…As mentioned above, the main components of an EHA are a motor, a bidirectional pump, and an oil cylinder connected by meter-in and meter-out valves. Specifically, a motor-driven pump without power transmission being hindered is employed; therefore, inefficient servo valves are eliminated [29]. As a rule, the EHA performs flow rate control by a pump coupled to a motor.…”

Section: Introductionmentioning

confidence: 99%

A Sliding Mode Control Strategy for an ElectroHydrostatic Actuator with Damping Variable Sliding Surface

Wang

Yang

et al. 2020

Actuators

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Electro-hydrostatic actuator (EHA) has significance in a variety of industrial tasks. For the purpose of elevating the working performance, we put forward a sliding mode control strategy for EHA operation with a damping variable sliding surface. To start with, a novel sliding mode controller and an extended state observer (ESO) are established to perform the proposed control strategy. Furthermore, based on the modeling of the EHA, simulations are carried out to analyze the working properties of the controller. More importantly, experiments are conducted for performance evaluation based on the simulation results. In comparison to the widely used control strategies, the experimental results establish strong evidence of both overshoot suppression and system rapidity.

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Section: Introductionmentioning

confidence: 99%