Uncertainty modeling and predicting the probability of stability and performance in the manufacture of dynamic systems

Fales, Roger

doi:10.1016/j.isatra.2010.02.003

Cited by 13 publications

(2 citation statements)

References 12 publications

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“…The literature provides a range of values for

. For example, Carpenter [ 18 ] used a value of 1.5, while Fales [ 23 ] employed a value of 6. Carpenter [ 22 ] also suggested a reasonable value of 0.01 for the low-frequency error,

.…”

Section: System Performancementioning

confidence: 99%

Design of uncertain displacement controlled velocity control system for hydraulic actuator

Mohmmed,

Hassan,

Ali

et al. 2024

Heliyon

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“…The literature provides a range of values for

. For example, Carpenter [ 18 ] used a value of 1.5, while Fales [ 23 ] employed a value of 6. Carpenter [ 22 ] also suggested a reasonable value of 0.01 for the low-frequency error,

.…”

Section: System Performancementioning

confidence: 99%

Design of uncertain displacement controlled velocity control system for hydraulic actuator

Mohmmed,

Hassan,

Ali

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…( ) used a value of 1.5 for M while a higher value was used by Fales [80] which is 6. A reasonable value of the low frequency error is 0.01 [78].…”

Section: H∞ Controller Designmentioning

confidence: 99%

Inlet metering pump analysis and experimental evaluation with application for flow control

Ali¹

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Axial piston pumps with variable volumetric displacement are often used to control flow and pressure in hydraulic systems. The displacement control mechanism in these pumps occupies significant space and accounts for significant cost in the pump design. Fixed displacement pumps have lower cost and a more compact design but suffer from significant energy consumption disadvantage due to the need for flow and pressure control by throttling flow and bypassing unused flow to pressures below the discharge pressure. An inlet metering valve (IMV) controlled pump marks a recent development in pumping technology for hydraulic systems. In this design, an inlet metering valve restricts inlet flow reducing inlet pressure so that the specific volume of the fluid is increased as it enters a fixed displacement pump. By altering the specific volume of the working fluid, the inlet metering valve permits precise control over the pump discharge flow. This study presents a theoretical model for inlet metering pump efficiency. The work considers additional sources of energy loss unique to the inlet metering system. Experimental results associated with inlet metering pump efficiency are presented. A comparison of the theoretical model and the experimental results is also included. It is determined that the current efficiency model accurately predicts efficiencies determined using experimental data. In addition, a velocity control system is considered which utilizes the inlet metering valve controlled pump. The stability and the performance of the velocity control system were studied for the open-loop and the closed-loop with a PID, H[infinity symbol], and a two degrees of freedom controllers. The simulation showed that the velocity control system is stable and has good performance characteristics.

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A new control design and robustness analysis of a variable speed hydrostatic transmission used to control the velocity of a hydraulic cylinder

Ali

Mustafa

Al-Bakri

2020

Int. J. Dynam. Control

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Uncertainty modeling and predicting the probability of stability and performance in the manufacture of dynamic systems

Cited by 13 publications

References 12 publications

Design of uncertain displacement controlled velocity control system for hydraulic actuator

Design of uncertain displacement controlled velocity control system for hydraulic actuator

Inlet metering pump analysis and experimental evaluation with application for flow control

A new control design and robustness analysis of a variable speed hydrostatic transmission used to control the velocity of a hydraulic cylinder

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