Robust Position Control of Electro-Hydrostatic Actuator Systems with Radial Basis Function Neural Networks

Choi, Jinhyeok

doi:10.1299/jamdsm.7.257

Cited by 15 publications

(5 citation statements)

References 7 publications

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“…Close inspection of Equations ( 2)- (5) shows that the system's state can be modified by managing the speed of the bidirectional pump powered by the AC servo motor. Thus, this reflects the primary aim of this study in developing a control technique that regulates the speed of the pump's shaft, thereby achieving precise tracking of the cylinder's real-time position with respect to its desired position.…”

Section: Modeling Of Electro-hydraulic Actuatormentioning

confidence: 99%

“…On the other hand, closed-loop circuits offer increased transmission efficiency by eliminating the need for directional control valves. Past investigations have utilized direct control of the hydraulic actuator by the operation of the pump [4,5]. Thus, a closed-loop circuit is more efficient in transmitting power to generate high force or torque in the actuator than an open-loop circuit.…”

Section: Introductionmentioning

confidence: 99%

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Development of an Adaptive Fuzzy Sliding Mode Controller of an Electrohydraulic Actuator Based on a Virtual Prototyping

2023

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The EHA (electro hydraulic actuator) has a notable advantage over conventional hydraulic actuators as it uses a closed-loop circuit, reducing the size and volume of oil, and eliminates pressure losses caused by valve orifices. However, accurate control performance of EHA is difficult to achieve using a traditional PID (proportional integral derivative) controller due to the strongly nonlinear, time-varying, and unknown dynamics of the system. Hence this paper seeks to address this problem by proposing a design of an intelligent controller for the EHA. The proposed adaptive fuzzy sliding mode controller (AFSMC) is developed as a hybrid of the adaptive, fuzzy logic, and sliding mode algorithms. To reduce costs and time, a virtual prototype approach is also proposed instead of experimentations to evaluate the performance of the proposed controller. The virtual model of the EHA is built in Amesime software, and then embedded into Matlab/Simulink where the AFSMC is developed and tested to obtain the position responses of the EHA. The results show that the AFSMC is highly successful and more efficient than the traditional PID at controlling the position of the piston accurately.

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Section: Modeling Of Electro-hydraulic Actuatormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of an Adaptive Fuzzy Sliding Mode Controller of an Electrohydraulic Actuator Based on a Virtual Prototyping

2023

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“…E Lectro-hydraulic servo actuator systems (EHSAS) find significant uses in several areas due to their reliability, maintainability and high power efficiency. Consequently, they are integrated into many applications such as manipulators, vehicles, robots, and aircraft [1]. Therefore, precise control of EHSAS is an active research area and great effort has been done in the field of dynamic modelling and control of actuators to enhance performance and accuracy.…”

Section: Introductionmentioning

confidence: 99%

System Identification and Controller Design for Hydraulic Actuator

Nisar¹,

Munawar²

2021

Preprint

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System Identification of Hydraulic Actuators is critical for analyzing their performance and designing a suitable Control System. Hydraulic actuators are extensively used in many applications, ranging from flight simulators, robotics, orthopaedic surgery, material testing, construction and many other industrial types of machinery. In the aviation industry, hydraulic actuators are currently being used in full flight simulators used for controlling the position and orientation of the motion platform. Every actuator has its own characteristics, therefore, the choice of excitation signals for System Identification must take into account the dynamics of the actuator under consideration. This work proposes the selection of excitation signals based on bandwidth of the hydraulic actuator. Validation of the proposed selection is done by performing system identification, obtaining a mathematical model and comparing it with a nonlinear hydraulic actuator model designed in Simscape. After validation, a nonlinear PID control has been tuned on the identified model and tested on the nonlinear model. Extensive simulations have been run and results show accurate mathematical modelling, as well as precise control has been achieved through the proposed methodology. INDEX TERMS Black-box model, controller design, electro-hydraulic actuator (EHA), flight simulator, NPID, hydraulic actuator, system identification.

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“…As the main actuators of hydraulic system, hydraulic cylinder with high positioning accuracy and high-quality dynamic characteristics has always been a concern of researches, and thus emerges servo control hydraulic system and advanced control algorithms, such as robust controllers (Kim and Choi, 2014;Loukianov et al, 2009;Choi, 2013), quantitative feedback control theory (Ren et al, 2016;Ahn and Dinh, 2009), fuzzy controllers (Mendonç a et al, 2012; 2. Nomenclature 1 A = effective area of the rod-less chamber 2 A = effective area of the rod chamber Figure 1 shows the schematic presentation of self-designed double closed-loop control digital hydraulic cylinder, which is mainly composed of a stepping motor, three-position four-way reversing valve, cylinder block and feedback ball screw.…”

Section: Introductionmentioning

confidence: 99%

Analyzing of influencing factors on dynamic response characteristics of double closed-loop control digital hydraulic cylinder

Xia

Shi

Yuan

et al. 2019

JAMDSM

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A digital hydraulic cylinder that uses mechanical closed-loop feedback regulation to realize double closed-loop control of displacement and velocity is designed in this study. Based on the working principle, the transfer function model and AMESim simulation model of digital hydraulic cylinder were established. The influence of pre-opening distance of the four-way reversing valve, ball-screw lead, inner diameter, and load on the displacement error, adjustment time, overshoot was analyzed. The standard regression analysis about the results was carried out as well. The results show the pre-opening distance of the four-way reversing valve has the greatest influence on the dynamic response characteristics of double closed-loop control digital hydraulic cylinder, and three Pearson coefficients are all greater than 0.9. The non-inertial load has a certain influence on the displacement error of the digital hydraulic cylinder. The optimal value of the ball-screw lead and inner diameter which have less effect on the dynamic characteristics of the system are 10mm and 90mm, respectively. Furthermore, the performance tests of the digital hydraulic cylinder sample were carried out.

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Robust Position Control of Electro-Hydrostatic Actuator Systems with Radial Basis Function Neural Networks

Cited by 15 publications

References 7 publications

Development of an Adaptive Fuzzy Sliding Mode Controller of an Electrohydraulic Actuator Based on a Virtual Prototyping

Development of an Adaptive Fuzzy Sliding Mode Controller of an Electrohydraulic Actuator Based on a Virtual Prototyping

System Identification and Controller Design for Hydraulic Actuator

Analyzing of influencing factors on dynamic response characteristics of double closed-loop control digital hydraulic cylinder

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