Force control for hydraulic load simulator using self-tuning grey predictor – fuzzy PID

Dinh, Truong Quang; Ahn, Kyoung Kwan

doi:10.1016/j.mechatronics.2008.07.007

Cited by 198 publications

(90 citation statements)

References 11 publications

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“…In order to test the actuator controlled by direct drive valve (DDV), Nam et al [37,38] developed the dynamic load simulator, and the robust controller for loading system is designed, which is based on the quantitative feedback control technology (QFT). For electro-hydraulic loading system, Ahn et al [39,40] proposed a fuzzy proportional-integral-derivative (PID) intelligent control algorithm, which combines with the fuzzy control algorithm, grey scale prediction, and PID control.…”

Section: Nonlinear Control Algorithm Of Electro-hydraulic Control Systemmentioning

confidence: 99%

Review on Inlet/Outlet Oil Coordinated Control for Electro-Hydraulic Power Mechanism under Sustained Negative Load

Liu

Dong

2018

Applied Sciences

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Speed control and smooth regulation in an electro-hydraulic motion control system under negative load (over-running load) are crucial to mobile machineries, vehicles, and motion simulation equipment. Problems, such as bad natural stability, bad dynamic performance for small adjusting signal, serious coupling, and difficulty to coordinate between speed smoothness and speed regulation, exist in traditional valve-controlled and pump-controlled electro-hydraulic power mechanism. The coordinated motion control scheme, which is based on independent regulation of inlet/outlet oil for electro-hydraulic power mechanism has attracted the attention of many scholars. In the last two decades, many progresses had been made in coordinated control technology, employing in inlet/outlet independent metering and pump/valves independent regulation. Moreover, the technology has been widely used in the electro-hydraulic operating system in hydraulic excavator and the speed smoothness control system in heavy transport vehicles. In this study, recent advancements and upcoming trends in coordinated control and inlet/outlet independent metering for electro-hydraulic power mechanism under sustained negative load are reviewed. Firstly, related research advancements are summarized, including flow rate regulation mechanism based on inlet/outlet coordinated control, coordinated control strategy and nonlinear control method of electro-hydraulic control system. Then, nonlinear modeling of inlet/outlet independent metering and pump/valves independent regulation in electro-hydraulic control system is presented. In addition, the electro-hydraulic speed smoothness control and energy recovery for heavy engineering vehicles under long down-slope is discussed and reviewed. Finally, existing problems and future trends of inlet/outlet coordinated control for an electro-hydraulic power mechanism under sustained negative load are presented.

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Section: Nonlinear Control Algorithm Of Electro-hydraulic Control Systemmentioning

confidence: 99%

Review on Inlet/Outlet Oil Coordinated Control for Electro-Hydraulic Power Mechanism under Sustained Negative Load

Liu

Dong

2018

Applied Sciences

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“…where α aver is the average weight and set as 0.5 [23,24]; β is a momentum rate within range [0, 1] and tuned by a Lyaponov-based SISO fuzzy mechanism (LFM) in order to guarantee a robust prediction performance (see the proof of this theory in reference [20])…”

Section: S T T T T S T T S T T T S T T Tmentioning

confidence: 99%

A Real-Time Bilateral Teleoperation Control System over Imperfect Network

Dinh¹,

Yoon²,

Ha³

et al. 2016

Real-Time Systems

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Functionality and performance of modern machines are directly affected by the implementation of real-time control systems. Especially in networked teleoperation applications, force feedback control and networked control are two of the most important factors, which determine the performance of the whole system. In force feedback control, generally it is necessary but difficult and expensive to attach sensors (force/torque/pressure sensors) to detect the environment information in order to drive properly the feedback force. In networked control, there always exist inevitable random time-varying delays and packet dropouts, which may degrade the system performance and, even worse, cause the system instability. Therefore in this chapter, a study on a real-time bilateral teleoperation control system (BTCS) over an imperfect network is discussed. First, current technologies for teleoperation as well as BTCSs are briefly reviewed. Second, an advanced concept for designing a bilateral teleoperation networked control (BTNCS) system is proposed, and the working principle is clearly explained. Third, an approach to develop a force-sensorless feedback control (FSFC) is proposed to simplify the sensor requirement in designing the BTNCS, while the correct sense of interaction between the slave and the environment can be ensured. Fourth, a robust-adaptive networked control (RANC)-based master controller is introduced to deal with control of the slave over the network containing both time delays and information loss. Case studies are carried out to evaluate the applicability of the suggested methodology.

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“…There are many investigations on the control strategy of the asymmetrical cylinder systems (13)(14)(15) . Under the condition of the system structure presented in this paper, if the traditional PID controller is adopted and the friction between the piston and the internal wall of cylinder is neglected, the control process can be expressed as follows: when the piston reaches the target position, the position error is "0", the output signal of PID is "0" and the valve closes; the oil volume of the non-rod chamber increases because 2 0 q = and 1 0 q > , so the piston moves forwards.…”

Section: Control Strategy and System Modelmentioning

confidence: 99%

Position Control of Asymmetric Hydraulic Cylinder with Two Chambers Connected

Lei

Wang

2011

JSDD

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This paper is concerned with position control of asymmetric hydraulic cylinder system. The hydraulic system consists of an asymmetric hydraulic cylinder with two chambers connected by an orifice, a two-position, two-way proportional valve and a load force. The system structure and the control principle were introduced in this paper. The influence of some structural parameters on the system dynamic performance was analyzed. The analysis and simulation results indicate that a two-position, two-way proportional valve can achieve position control of the asymmetric hydraulic cylinder system. A good dynamic performance can be achieved after using the control strategy proposed by this paper.

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Force control for hydraulic load simulator using self-tuning grey predictor – fuzzy PID

Cited by 198 publications

References 11 publications

Review on Inlet/Outlet Oil Coordinated Control for Electro-Hydraulic Power Mechanism under Sustained Negative Load

Review on Inlet/Outlet Oil Coordinated Control for Electro-Hydraulic Power Mechanism under Sustained Negative Load

A Real-Time Bilateral Teleoperation Control System over Imperfect Network

Position Control of Asymmetric Hydraulic Cylinder with Two Chambers Connected

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