0000000000210210

AUTHOR

Petter H. Gøytil

showing 4 related works from this author

A Novel Solution for the Elimination of Mode Switching in Pump-Controlled Single-Rod Cylinders

2020

This paper concerns the stability issue of pump-controlled single-rod cylinders, known as mode switching. First, a review of the topic is provided. Thereafter, the most recently proposed solution for the elimination of mode switching is investigated and shown to result in unstable behavior under certain operating conditions. A theoretical analysis is provided demonstrating the underlying mechanisms of this behavior. Based on the analysis, a novel control strategy is proposed and investigated numerically. Proper operation and stability are demonstrated for a wide range of operating conditions, including situations under which the most recently proposed solution results in unstable behavior a…

0209 industrial biotechnologyControl and OptimizationMaterials science020209 energy02 engineering and technologyelectrohydraulic valvesStability (probability)020901 industrial engineering & automationlinear actuatorsControl theorylcsh:TK1001-18410202 electrical engineering electronic engineering information engineeringlcsh:TA401-492large inertia loadsLinear actuatorstabilitylcsh:Production of electric energy or power. Powerplants. Central stationsRange (mathematics)VDP::Teknologi: 500single-pump circuitsmode switching instabilityControl and Systems EngineeringoscillationsMode switchinglcsh:Materials of engineering and construction. Mechanics of materialsActuatorpump-controlled systemsActuators
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On the Energy Efficiency of Dual Prime Mover Pump-Controlled Hydraulic Cylinders

2019

Abstract This paper concerns the energy efficiency of a special class of pump-controlled hydraulic cylinders utilizing two prime movers. The performance of such circuits has been studied previously motivated by their capability of providing an actuator stiffness similar to that of servo valve-controlled systems. This characteristic may improve performance and robustness in applications requiring feedback control. In this paper, the presence of losses similar to that of fluid throttling, in the sense that they occur even in the absence of component inefficiencies, are demonstrated for such circuits and shown to degrade the overall energy efficiency of the system. The conditions under which s…

Hydraulic cylinderControl theoryComputer scienceRobustness (computer science)medicineStiffnessmedicine.symptomActuatorPrime moverElectronic circuitDual (category theory)Efficient energy useASME/BATH 2019 Symposium on Fluid Power and Motion Control
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Iterative Learning Applied to Hydraulic Pressure Control

2018

This paper addresses a performance limiting phenomenon that may occur in the pressure control of hydraulic actuators subjected to external velocity disturbances. It is demonstrated that under certain conditions a severe peaking of the control error may be observed that significantly degrades the performance of the system due to the presence of nonlinearities. The phenomenon is investigated numerically and experimentally using a system that requires pressure control of two hydraulic cylinders. It is demonstrated that the common solution of feed forwarding the velocity disturbance is not effective in reducing the peaking that occurs as a result of this phenomenon. To improve the system perfor…

peaking phenomenon0209 industrial biotechnologylimit cyclesComputer scienceControl (management)Iterative learning controliterative learning controlHydraulic pressure control02 engineering and technologyHydraulic pressurelcsh:QA75.5-76.95Computer Science Applications020901 industrial engineering & automationControl and Systems EngineeringControl theoryModeling and Simulation0202 electrical engineering electronic engineering information engineering020201 artificial intelligence & image processinglcsh:Electronic computers. Computer scienceSoftwareModeling, Identification and Control: A Norwegian Research Bulletin
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Motion Control of Large Inertia Loads Using Electrohydrostatic Actuation

2020

Electrohydrostatic actuation is an emerging technology combining the advantages of hydraulic and electric actuation, resulting in energy efficient solutions that appear electric from the outside while hydraulic on the inside. Conventional solutions, however, significantly reduce the natural frequency of the system compared to traditional hydraulic actuators. This may result in considerable loss of performance under feedback control. In this paper, a simple modification for increasing the natural frequency of the system involving a high-pressure accumulator is proposed and investigated. Theoretical analysis demonstrates the potential for considerable improvements using the proposed solution,…

Computer simulationComputer science020209 energymedia_common.quotation_subject020208 electrical & electronic engineeringNatural frequency02 engineering and technologyInertiaMotion controlAccumulator (energy)Improved performanceControl theory0202 electrical engineering electronic engineering information engineeringActuatormedia_commonEfficient energy use2020 IEEE 16th International Workshop on Advanced Motion Control (AMC)
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