Modeling and nonlinear parameter identification for hydraulic servo-systems with switching properties

Maier, Clemens C.; Schröders, Simon; Ebner, Wolfgang; Köster, Marius; Fidlin, Alexander; Hametner, Christoph

doi:10.1016/j.mechatronics.2019.05.005

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…There are many research reports on electro-hydraulic position servo system and speed servo system at home and abroad. The application of control theory and various control strategies can improve the steady-state control accuracy and dynamic performance of the system [1][2][3][4][5][6][7] . However, there is still a problem that the symmetrical valve controlled asymmetric hydraulic cylinder has the problem of asymmetric control, especially in the control occasions with large load and high precision, and when the load changes in a wide range, this phenomenon is more prominent.…”

Section: Prefacementioning

confidence: 99%

Research on control strategy of asymmetric electro-hydraulic servo system based on improved PSO algorithm

et al. 2022

Advances in Mechanical Engineering

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In the electro-hydraulic servo control system, there are some problems, such as low position control accuracy, uncontrollable speed, speed impact, and asymmetric control due to the asymmetry of hydraulic cylinder. To solve the above problems, this paper proposes a Fuzzy PID control algorithm with load force compensation based on improved PSO optimization. This improved particle swarm optimization algorithm introduces crossover and mutation operations in genetic algorithm to improve the optimization performance of traditional particle swarm optimization algorithm. The mathematical model of valve controlled asymmetric cylinder is established, and the Amesim linearization analysis function is used to identify the system, establish the transfer function, and build the control system. The joint simulation and test results of Amesim and MATLAB show that the proposed control strategy can realize the simultaneous control of speed and position. Under different loads, different speeds, and different input follow signals, it does not need to adjust any parameters. Regardless of forward or reverse operation, the optimal dynamic performance and minimum steady-state error are obtained, which greatly improves the response speed of the system. The effectiveness and superiority of the improved PSO compound control strategy are verified.

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Section: Prefacementioning

confidence: 99%

Research on control strategy of asymmetric electro-hydraulic servo system based on improved PSO algorithm

et al. 2022

Advances in Mechanical Engineering

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“…where U fuzzy represents the final output of fuzzy controller, U PIDthe final output of PID controller, and Zthe language variable of fuzzy switching [11].…”

Section: Identification and Correction Of Power Parameters Of Hydraulic Hybrid Transmission Structure Of Loadermentioning

confidence: 99%

Mechanical transmission system of loader based on hydraulic hybrid technology

Wang

Yang

2021

THERM SCI

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In order to solve the problems of high energy consumption, high noise and pollution gas emission existing in the mechanical transmission system of loader, a research on the mechanical transmission system of loader based on hydraulic hybrid technology is proposed. The mechanical energy and heat energy are generated by the mechanical operation of the loader, which are converted into hydraulic energy and output to the drive system. According to the fast response characteristics and high power density characteristics of the hydraulic power system relative to the thermal engine, the dynamic model of the hydraulic hybrid drive system of the loader is established. The double fuzzy PID control method is used to identify and modify the unknown load and power parameters of the drive system. Through the experiment, it is concluded that the power parameter matching of the transmission system using the hydraulic hybrid technology is more optimized, the application effect is good, and the efficiency of the power transmission system can be maximized.

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“…Hydraulic systems also have some model uncertainties, such as damping coefficients and unknown time-varying load forces. Both drawbacks cause control difficulties, in turn [ 11 , 12 ]. Conventional PID controllers cannot achieve ideal control effects, and have poor adaptability to operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Disturbance observer-based adaptive position control for a cutterhead anti-torque system

Zhang

Fang

Yu³

et al. 2022

PLoS ONE

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To conveniently replace worn cutterhead tools in complicated strata, a novel cutterhead attitude control mechanism was recently designed. Meanwhile, the mechanism also causes an engineering problem of how to control a matching cutterhead anti-torque system (CATS) effectively, which is used to prevent a drive box of the cutterhead from rotation during a complex excavation process. In this paper, a disturbance observer-based adaptive position controller is proposed for the CATS. The proposed method presents a nonlinear adaptive controller with adaptation laws to compensate for the unknown time-varying load torque and damping uncertainty in the system. Based on the disturbance observer method and sliding mode control, an asymptotically stable controller proven by Lyapunov theory is constructed using the back-stepping technique. In addition, a virtual test rig based on MATLAB and AMESim co-simulation is built to verify the validity of the proposed controller. The simulation results show that the proposed method has good performance for tracking tasks in the presence of uncertainties compared with PID control. Together, the data support targeting disturbance observer-based adaptive position control as a potential control strategy for cutterhead anti-torque systems.

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Modeling and nonlinear parameter identification for hydraulic servo-systems with switching properties

Cited by 14 publications

References 16 publications

Research on control strategy of asymmetric electro-hydraulic servo system based on improved PSO algorithm

Research on control strategy of asymmetric electro-hydraulic servo system based on improved PSO algorithm

Mechanical transmission system of loader based on hydraulic hybrid technology

Disturbance observer-based adaptive position control for a cutterhead anti-torque system

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