Active Noise Control of a Variable Displacement Axial Piston Pump With Even Number of Cylinders

Ohuchi, Hidetoshi; Masuda, Kenji

doi:10.5739/isfp.1999.79

Cited by 4 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pressure ripple reduction can be achieved with the active pressure controller. Compared with the manual adjustment from Ohuchi et al [ 21 ], the active pressure controller is capable of calculating the optimal amplitude and phase of the additional sinusoidal signal. This makes it better suited to the varying working conditions of variable displacement pumps.…”

Section: Analysis and Discussionmentioning

confidence: 99%

“…Inspired by these, a few researchers investigate the active control methods utilizing the control valve of the variable displacement pump itself. Ohuchi et al [ 21 ] proposed an active noise control method by controlling the swash plate vibration using the servo valve. The adjustment of the sinusoidal signal depended on the manual adjustment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Active Pressure Ripple Reduction of a Self-Supplied Variable Displacement Pump with Notch Least Mean Square Filter

Huang

et al. 2021

Micromachines

View full text Add to dashboard Cite

As the power sources in hydraulic systems, variable displacement axial piston pumps generate flow fluctuation. Unfortunately, it results in pressure pulsation which excites the system vibration and emitted noise. The majority of studies try to eliminate the pulsation via a passive technique and the active control methodology has not been discussed in detail. In this research, the feasibility of reducing the pressure ripple by properly controlling the proportional valve has been investigated, which also supports the miniaturization of the active control system. A mathematical model of the self-supplied variable displacement pump including the control system has been developed. The filtered-X least mean square algorithm with time-delay compensation is utilized to calculate the active control signal. Simulation results show the effectiveness of the active control technique. The effect of the active control signal on the flow rate from different chambers of the pump has been analyzed. It demonstrates that the variation of the pressure pulsation should be ascribed to the comprehensive reaction of different flow rates. The major reason is that the flow of the actuator piston neutralizes the peak value of the flow ripple, generated by the nine pistons.

show abstract

Section: Analysis and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Active Pressure Ripple Reduction of a Self-Supplied Variable Displacement Pump with Notch Least Mean Square Filter

Huang

et al. 2021

Micromachines

View full text Add to dashboard Cite

show abstract

“…So far, the fundamentals of noise generation in hydraulic pumps are shown. In the last decades, much effort was spent to reduce the noise emission of pumps or to increase the understanding of noise generation [4,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. However, the presented study is about a psychoacoustic evaluation of hydraulic pumps, which have not been subject of research activities.…”

Section: Noise Generation In Hydraulic Systemsmentioning

confidence: 99%

Psychoacoustic Evaluation of Hydraulic Pumps

et al. 2021

View full text Add to dashboard Cite

In this study, sound measurements of an axial piston pump and an internal gear pump were performed and subjective pleasantness judgements were collected in listening tests (to analyze the subjective pleasantness), which could be seen as the inverse of the subjective annoyance of hydraulic drives. Pumps are the dominant sound source in hydraulic systems. The noise generation of displacement machines is subject of current research. However, in this research only the sound pressure level (SPL) was considered. Psychoacoustic metrics give new possibilities to analyze the sound of hydraulic drive technology and to improve the sound quality. For this purpose, instrumental measurements of the acoustic and psychoacoustic parameters are evaluated for both pump types. The recorded sounds are played back to the participants in listening tests. Participants evaluate them regarding the subjective pleasantness by means of paired comparison, which is an indirect scaling method. The dependence of the subjective pleasantness on speed and pressure was analyzed for both pump types. Different regression analyses were carried out to predict the subjectively perceived pleasantness or annoyance of the pumps. Results show that a lower speed is the decisive operating parameter for reducing both the SPL and the annoyance of a hydraulic pump.

show abstract

“…(6) (7) Desired swash plate angle The electronic swash plate angle sensor (2) measures the angular position of the swash plate (1). The high speed controller (3) sends control signals to the servovalve (4) which regulates fluid flow to either side of the control cylinder (5) based on the swash plate angle sensor feedback signal.…”

Section: + -mentioning

confidence: 99%

“…A passive swash plate vibration control technique was investigated by connecting displacement chamber and the swash plate control cylinders [6]. Active swash plate vibration control techniques relying on human tuning of the phase and amplitude of sinusoidal cancellation signal were investigated for both even and odd pistons pumps [7,8]. Recently, the author demonstrated the feasibility of active vibration control based on the adaptive Least Mean Squares (LMS) filter [9].…”

Section: Introductionmentioning

confidence: 99%

Active Vibration Control of Swash Plate-Type Axial Piston Machines with Two-Weight Notch Least Mean Square/Filtered-x Least Mean Square (LMS/FxLMS) Filters

Kim

Ivantysynova

2017

Energies

View full text Add to dashboard Cite

Abstract:In this paper, swash plate active vibration control techniques were investigated utilizing the weight-limited multi-frequency two-weight notch Least Mean Square (LMS) filter with unit delay compensation and multi-frequency two-weight notch Filtered-x Least Mean Sqaure (FxLMS) filter with offline modeling to achieve adjustable swash plate vibration reduction at the desired frequency. Simulation studies of the high fidelity pump control system model including realistic swash plate moments are presented to demonstrate the feasibility of the swash plate active vibration control. A 75-cm 3 /rev swash plate type axial piston pump was modified to implement a high bandwidth pump control system which is required for canceling the swash plate vibration. High speed real-time controllers were proposed and realized using an National Instrument LabVIEW Field Programmable Gate Array (FPGA). Vibration measurements using a tri-axial swash plate acceleration sensor were conducted to show the influence and effectiveness of the proposed swash plate active vibration control system and algorithms.

show abstract

Active Noise Control of a Variable Displacement Axial Piston Pump With Even Number of Cylinders

Cited by 4 publications

References 5 publications

Active Pressure Ripple Reduction of a Self-Supplied Variable Displacement Pump with Notch Least Mean Square Filter

Active Pressure Ripple Reduction of a Self-Supplied Variable Displacement Pump with Notch Least Mean Square Filter

Psychoacoustic Evaluation of Hydraulic Pumps

Active Vibration Control of Swash Plate-Type Axial Piston Machines with Two-Weight Notch Least Mean Square/Filtered-x Least Mean Square (LMS/FxLMS) Filters

Contact Info

Product

Resources

About