Measurements of a Novel Digital Hydraulic Valve Comprising a Cushioning Feature

Bender, Niels Christian; Plöckinger, Andreas; Foschum, Poul; Winkler, Bernd; Pedersen, Henrik C.

doi:10.1115/1.4044811

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…FSVs have been considered and analyzed in several research contexts, see, e.g. [2][3][4][5][6][7][8][9], and also considered by commercial valve manufacturers as discussed in [7]. Therefore, some general requirements are starting to emerge.…”

Section: Fast Switching Valvesmentioning

confidence: 99%

“…The input parameters are determined from physical factors known to influence the output parameters and a systematic series of simulations. For this, several manufactured sub-optimal valve prototypes have been used to validate the quantities predicted by the models, described and validated in [6,8,9,25]. The inputs are summarized in Table 2.…”

Section: Design Basis and Parametrizationmentioning

confidence: 99%

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Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Pedersen

Bender²,

Andersen

2023

TJFP

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Designing Fast Switching Valves (FSVs) for digital displacement units is a complicated process pushing the technology to the limit. The system dynamics and the interaction of the fluid, mechanical structure, actuator and control hence calls for advanced modelling, including CFD and FEA, to capture, e.g. fluid stiction effects, end-damping and impact contact stresses. Unfortunately, this essentially renders optimization processes infeasible due to the computational burden involved, although this is precisely what is required for this type of complex multi-domain problem. Therefore, the focus of the current article is on how a complex mechatronic design problem, like designing an FSV, may be aided by considering decomposing and simplification through sensitivity analysis and analyzing correlations between the design and output parameters. This is done to significantly reduce the original design problem without compromising the investigated design space. The paper focuses specifically on the results related to an FSV and the flow delivering part of this, showing the influence of the various design parameters. However, the approach and considerations may be generalized to an other areas as well.

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Section: Fast Switching Valvesmentioning

confidence: 99%

Section: Design Basis and Parametrizationmentioning

confidence: 99%

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Pedersen

Bender²,

Andersen

2023

TJFP

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“…Moreover, in the two seat valves, there is a common risk of the permanent magnet demagnetization caused by the mechanical impact between the plunger and the valve seat. To solve this problem, the structure of the plunger or valve seat need to be optimized [28].…”

Section: Direct Drive Hsvmentioning

confidence: 99%

Development of High-Speed On–Off Valves and Their Applications

Wang

Chen

Huang

et al. 2022

Chin. J. Mech. Eng.

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With the widespread application of the computer and microelectronic technology in the industry, digitization becomes the inevitable developing trend of the hydraulic technology. Digitization of the hydraulic components is critical in the digital hydraulic technology. High-speed on-off valves (HSVs) which convert a train of input pulses into the fast and accurate switching between the on and off states belong to widely used basic digital hydraulic elements. In some ways, the characteristics of the HSVs determine the performance of the digital hydraulic systems. This paper discusses the development of HSVs and their applications. First, the HSVs with innovative structures which is classified into direct drive valves and pilot operated valves are discussed, with the emphasis on their performance. Then, an overview of HSVs with intelligent materials is presented with considering of the switching frequency and flow capacity. Finally, the applications of the HSVs are reviewed, including digital hydraulic components with the integration of the HSVs and digital hydraulic systems controlled by the HSVs.

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“…They used a quasi-time optimal control to design a feed-forward controller for the fast-switching solenoids. Bender et al 21 proposed a probability-based optimal control design for soft-landing of short-stroke actuators. Soft landing optimal control was formulated by the addition of probability functions for a trajectory planning problem.…”

Section: Introductionmentioning

confidence: 99%

Sensorless position control of solenoid actuators for soft landing using super-twisting sliding mode control

Qureshi

Bebek

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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This article presents an open-loop control methodology to achieve lower seating velocities (i.e. soft-landing) for solenoid-based injector systems which are widely used in automotive as fuel injection valves or gas exchange valves of internal combustion engines to spray various fluids. Physical sensors are not preferred to be used in injectors in order to increase reliability and reduce cost. As a result, it becomes impossible to control the motion of the moving parts within injectors in closed-loop. This study offers a novel sensorless position tracking approach with which impact noise can be reduced and mechanical wear and tear can be minimized. Using the Hammerstein-Wiener modeling method and a super-twisting sliding mode controller this new approach replicates the dynamics of the injector and tracks specially designed position reference signals to achieve soft landing. The effectiveness of this approach is based on the observed negligible position and velocity errors between the estimated and actual measurements. This study also offers a new way to optimize the settling time of the injector systems, while ensuring soft landing. Using the proposed approach here, the closing profiles of the reference signals were refined according to the admittance time of the solenoid actuator and the optimal closing profile signals were selected based on performance comparisons with the baseline. The results of the experiments are presented and the promising effectiveness of the proposed approach is discussed.

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Measurements of a Novel Digital Hydraulic Valve Comprising a Cushioning Feature

Cited by 4 publications

References 13 publications

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Investigating the Design Parameters’ Influence in a Fast Switching Valve – An Approach to Simplify the Design Process

Development of High-Speed On–Off Valves and Their Applications

Sensorless position control of solenoid actuators for soft landing using super-twisting sliding mode control

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