Improved Position Tracking Performance of Electro Hydraulic Actuator Using PID and Sliding Mode Controller

Electro Hydraulic Servo Systems (EHSS) offer fast response in different industrial aspects such as heavy machines, cranes and robots. To obtain a precise piston profile and to achieve the designed speed, a Sliding Mode Controller (SMC) for the duration of piston extension and retraction is presented in this paper. The novelty lies in the development of a practical profile connecting the system supply pressure dynamics to the duration of piston extension and retraction. Based on the curve fitting technique, a quadratic profile is designed for a practical hydraulic press. The Sliding Mode Controller is employed to achieve repeatable tracking of the profile generated with guaranteed soft seating velocity, thereby increasing the lifetime of the hydraulic press. The performance of the proposed controller is compared with the baseline Proportional Integral Derivative (PID) controller with square wave as well as exponential wave tracking tests in simulation and experimentation which confirm the effectiveness of the proposed control scheme.

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“…The experimental setup developed by Thomas et al, 42 is used for testing the designed trajectories as shown in Figure 6.…”

Section: Practical Trajectorymentioning

confidence: 99%

Practical profile tracking for a hydraulic press using sliding mode controller

Thomas

Parameshwaran

Sathiyavathi

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…A combination of load sensing technology to regulate the valve control system was used to overcome the problem of low energy efficiency in the operation of the hydraulic press valve control system [14]. Focusing on the position control of low-velocity servo controlled electro-hydraulic actuator system in order to increase the system productivity, an efficient sliding mode control was designed based on the selection of appropriate sliding surface and control law to overcome the nonlinearities and uncertainties caused by friction and internal leakages [15]. In order to avoid wrinkling, an adaptive simulation approach integrated with a fuzzy control algorithm was used to optimize the loading path of hydroforming a T-shaped tube [16].…”

Section: Introductionmentioning

confidence: 99%

Speed tracking control for electro-hydraulic system considering variable load disturbance

Xu¹,

2023

J. Eng. Appl. Sci.

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Forming speed is one of the key factors affecting metal forming performance. Aluminum in different forming stages need to control different extrusion speed, and withstand different extrusion load. The accuracy and stability of forming speed directly affect the quality of aluminum. Aiming to improve the stability of the forming speed under variable load, the paper established segmented model according to the forming speed and load force conditions. And the unified switching control strategy is proposed based on robust feedback linearized control. In order to improve the robustness of the system, the control law adding compensation items to the variable load disturbance is designed based on the sliding mode control. The boundary layer function is introduced instead of the symbolic function to reduce the system flutter. The proportional derivative control (PD) control, robust control and unified switching control are compared with that of simulation and experiment. The results show that proposed method not only maintains good tracking performance but also has strong robustness under external load disturbance.

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“…However, EHA systems also have disadvantages including internal leakage, parametric uncertainties, external disturbance which makes these systems unstable, and the fluids inside them being often caustic and some seals [1][2][3][4]. To minimize the effect of parametric uncertainties in the EHA, nonlinear control schemes such as PID controller [5,6], adaptive control [7,8], Fuzzy-PID [9,10], sliding mode control [11][12][13][14][15], and neural network control [16][17][18][19] were proposed. The PID controller and adaptive control can reduce the adverse effect of parametric uncertainties, but they cannot completely deal with the influence of the above noises.…”

Section: Introductionmentioning

confidence: 99%

Robust Control Optimization Based on Actuator Fault and Sensor Fault Compensation for Mini Motion Package Electro-Hydraulic Actuator

2021

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In recent years, electro-hydraulic systems have been widely used in many industries and have attracted research attention because of their outstanding characteristics such as power, accuracy, efficiency, and ease of maintenance. However, such systems face serious problems caused simultaneously by disturbances, internal leakage fault, sensor fault, and dynamic uncertain equation components, which make the system unstable and unsafe. Therefore, in this paper, we focus on the estimation of system fault and uncertainties with the aid of advanced fault compensation techniques. First, we design a sliding mode observer using the Lyapunov algorithm to estimate actuator faults that produce not only internal leakage fault but also disturbances or unknown input uncertainties. These faults occur under the effect of payload variations and unknown friction nonlinearities. Second, Lyapunov analysis-based unknown input observer model is designed to estimate sensor faults arising from sensor noises and faults. Third, to minimize the estimated faults, a combination of actuator and sensor compensation fault is proposed, in which the compensation process is performed due to the difference between the output signal and its estimation. Finally, the numerical simulations are performed to demonstrate the effectiveness of the proposed method obtained under various faulty scenarios. The simulation results show that the efficiency of the proposed solution is better than the traditional PID controller and the sensor fault compensation method, despite the influence of noises.

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Improved Position Tracking Performance of Electro Hydraulic Actuator Using PID and Sliding Mode Controller

Cited by 23 publications

References 16 publications

Practical profile tracking for a hydraulic press using sliding mode controller

Practical profile tracking for a hydraulic press using sliding mode controller

Speed tracking control for electro-hydraulic system considering variable load disturbance

Robust Control Optimization Based on Actuator Fault and Sensor Fault Compensation for Mini Motion Package Electro-Hydraulic Actuator

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