Proceedings ArticleDOI
Study of the electro-hydraulic load simulator based on double servo valve concurrent control
Jianying Li,Junpeng Shao,Zhongwen WangBo,Wu Guihua Han +3 more
- pp 3-699-3-705
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TLDR
In this paper, a double valve concurrent control method was proposed to improve the performance of the load system of the electro-hydraulic force servo rudder load simulator and to solve the superfluous force problem caused by the forced flow.Abstract:
The superfluous force exists in the electro-hydraulic servo rudder load system, and seriously affects the dynamic load precision of the system. Meanwhile, the superfluous force makes the stability of the system bad, let frequency width dwindle, and reduces the load sensitivity of the system. Aiming at these questions and in order to improve the control performance of the load system of the electro-hydraulic load simulator, furthermore, for the sake of solving the superfluous force this technical problem caused by the forced flow, the author proposes the method of adopting the flow servo valve and the flow-press servo valve concurrent control the electro-hydraulic load simulator load system. This method makes the flow-press servo valve as a flow compensation tache, and changes the electro-hydraulic force servo system with strong position disturbance to the electro-hydraulic force servo system without disturbance. Then the author studies the electro-hydraulic force servo system on building its model, simulation and experiment and the result of the study shows that the superfluous force obviously decrease when the double valve concurrent control method adopted to the load system. At the same time, the dynamic load precision of the load system is obviously improved.read more
Citations
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Journal ArticleDOI
Nonlinear adaptive torque control of electro-hydraulic load system with external active motion disturbance
TL;DR: In this article, a Lyapunov-based adaptive control method for electro-hydraulic load simulator (EHLS) is developed. But, the tracking performance of EHLS is mainly affected by the following factors: actuator's active motion disturbance, flow nonlinear and parametric uncertainties, etc.
Patent
Hydraulic control system and control block
TL;DR: In this article, a hydraulic control arrangement for controlling a hydraulic consumer and a running with at least one such a control arrangement mobile control block, wherein in the supply to the consumer and in the return flow from the consumer are each a Verntilschieber for adjusting the inflow and outflow cross-section is arranged.
Journal ArticleDOI
Adaptive velocity synchronization compound control of electro-hydraulic load simulator
TL;DR: In this paper, a compound control scheme consisting of a synchronization controller and a torque PI controller is developed to suppress the actuator's motion disturbance problem in hardware-in-the-loop (HIL) experiment.
Journal ArticleDOI
An experimental study of the dual-loop control of electro-hydraulic load simulator (EHLS)
TL;DR: In this article, a dual-loop scheme is proposed for EHLS, which is a combination of a torque loop and a position synchronization loop to decouple the motion disturbance caused by the actuator system.
Journal ArticleDOI
Nonlinear robust dual-loop control for electro-hydraulic load simulator.
TL;DR: In order to suppress actuator's motion disturbance, a nonlinear robust dual-loop control scheme is developed, which consists of a open-loop nonlinear velocity feed-forward compensator and a closed- loop nonlinear deterministic robust torque controller.
References
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Journal ArticleDOI
Experiments and simulations on the nonlinear control of a hydraulic servosystem
G.A. Sohl,James E. Bobrow +1 more
TL;DR: This paper presents the derivation, simulation, and implementation of a nonlinear tracking control law for a hydraulic servosystem that provides for exponentially stable force trajectory tracking and is extended to provide position tracking.
Journal ArticleDOI
Design and experimental evaluation of a robust force controller for an electro-hydraulic actuator via quantitative feedback theory
Navid Niksefat,Nariman Sepehri +1 more
TL;DR: In this article, the authors present the design and experimental evaluation of an explicit force controller for a hydraulic actuator in the presence of significant system uncertainties and nonlinearities, which enjoys the simplicity of fixed-gain controllers while exhibiting robustness.
Journal ArticleDOI
Force control system design for aerodynamic load simulator
Yoonsu Nam,Sung Kyung Hong +1 more
TL;DR: In this paper, a force controller based on quantitative feedback theory (QFT) is designed to simulate the wide spectrum of aerodynamic hinge moment variation within some accuracy bounds, and a dynamic model of load actuation system is derived.
Journal ArticleDOI
The Velocity Synchronizing Control on the Electro-Hydraulic Load Simulator
TL;DR: In this paper, an accurate nonlinear mathematical model of an electro hydraulic force/torque servo control system was built up and a thorough theoretical analysis on the feedforward compensation for extraneous forces/torques was provided.
Patent
Hydraulic control system and control block
TL;DR: In this article, a hydraulic control arrangement for controlling a hydraulic consumer and a running with at least one such a control arrangement mobile control block, wherein in the supply to the consumer and in the return flow from the consumer are each a Verntilschieber for adjusting the inflow and outflow cross-section is arranged.