A switched energy saving position controller for variable-pressure electro-hydraulic servo systems

Tivay, Ali; Zareinejad, Mohammad; Rezaei, Seyed Mehdi; Baghestan, Keivan

doi:10.1016/j.isatra.2014.04.010

Cited by 31 publications

(23 citation statements)

References 15 publications

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“…where c is an adjustable positive factor. Differentiating V and noting equations (22), (24), (26), and (28) yields…”

Section: Resultsmentioning

confidence: 99%

“…Typically, the system comprises of a constant displacement pump and the supply pressure is regulated by the proportional relief valve. In [22], a LQR controller-based VSPC is presented to improve the system efficiency as well as the tracking performance. In [23], the control law of VSPC can also be deduced by assuming the desired spool position.…”

Section: Introductionmentioning

confidence: 99%

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Energy-Efficient Robust Control for Direct Drive and Energy Recuperation Hydraulic Servo System

Wei-ping

Zhao

2020

Complexity

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During the vertical cyclic actuation process of heavy materials handling, the gravitational potential energy will be converted to heat in the form of throttle in the traditional hydraulic system. Therefore, large energy dissipation is inevitable is this process. In order to achieve energy recuperation, as well as precise trajectory tracking, a direct drive and energy recuperation system is developed. To be specific, the function of direct drive and energy recovery is realized via the three-chamber actuator and a hydraulic accumulator. Moreover, the optimized parameters are obtained by the simulated annealing algorithm. To further reduce the energy consumption, the variable supply pressure control circuit is introduced into the system. Furthermore, the prescribed tracking performance is guaranteed by the proposed robust controller. To compensate for the uncertainties, both in the variable supply pressure control circuit and the robust controller, the RBF neural network is employed to approximate the unknown function. The presented approach theoretically possesses the ability to minimize the energy consumption while maintaining satisfied tracking accuracy. The results demonstrate that the proposed approach can save nearly 90 percent of the energy, and the maximum tracking error is 2 mm.

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“…where c is an adjustable positive factor. Differentiating V and noting equations (22), (24), (26), and (28) yields…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy-Efficient Robust Control for Direct Drive and Energy Recuperation Hydraulic Servo System

Wei-ping

Zhao

2020

Complexity

View full text Add to dashboard Cite

show abstract

“…In the electro-hydraulic servo [5][6][7][8] , the hydraulic cylinder pushes the load, the displacement sensor at the load converts location signal to electrical signal. The bias between the actual location signal and the designated location signal is amplified and applied on the electro-hydraulic servo valve.…”

Section: Establish System Modelingmentioning

confidence: 99%

Modeling and stability of electro-hydraulic servo of hydraulic excavator

Jia

Yin

et al. 2017

IOP Conf. Ser.: Earth Environ. Sci.

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“…In addition, the economic dimension has been deeply studied due to its direct effect over the energy costs. In this way, several strategies, which include improvements in technologies for data acquisition and analysis, as well as for modeling, monitoring, and control of manufacturing systems, have been proposed [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

An optimization-based control strategy for energy efficiency of discrete manufacturing systems

et al. 2019

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In order to reduce the global energy consumption and avoid highest power peaks during operation of manufacturing systems, an optimization-based controller for selective switching on/off of peripheral devices in a test bench that emulates the energy consumption of a periodic system is proposed. First, energy consumption models for the test-bench devices are obtained based on data and subspace identification methods. Next, a control strategy is designed based on both optimization and receding horizon approach, considering the energy consumption models, operating constraints, and the real processes performed by peripheral devices. Thus, a control policy based on dynamical models of peripheral devices is proposed to reduce the energy consumption of the manufacturing systems without sacrificing the productivity. Afterward, the proposed strategy is validated in the test bench and comparing to a typical rule-based control scheme commonly used for these manufacturing systems. Based on the obtained results, reductions near 7% could be achieved allowing improvements in energy efficiency via minimization of the energy costs related to nominal power purchased.

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A switched energy saving position controller for variable-pressure electro-hydraulic servo systems

Cited by 31 publications

References 15 publications

Energy-Efficient Robust Control for Direct Drive and Energy Recuperation Hydraulic Servo System

Energy-Efficient Robust Control for Direct Drive and Energy Recuperation Hydraulic Servo System

Modeling and stability of electro-hydraulic servo of hydraulic excavator

An optimization-based control strategy for energy efficiency of discrete manufacturing systems

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