INVESTIGATION OF NOISE SOURCES ON A SERIES HYBRID TRANSMISSION

Authors

  • Richard Klop Purdue University, Department of Agricultural and Biological Engineering, 225 S. University St., West Lafayette, Indiana 47907, USA
  • Monika Ivantysynova Purdue University, Department of Agricultural and Biological Engineering, 225 S. University St., West Lafayette, Indiana 47907, USA

Keywords:

hydrostatic transmission, sound power, noise sources, measurements, TransModel, series hybrid

Abstract

Advanced hydrostatic transmissions and hydraulic hybrids show potential in new market segments such as commercial vehicles and passenger cars. Such new applications regard low noise generation as a high priority, thus, demanding new quiet hydrostatic transmission designs. The aim of this paper is to investigate noise sources on a series hybrid transmission through simulation and measurements. A model has been developed to capture the interaction of a pump and motor working in a hydrostatic transmission and to predict overall noise sources. The model describes dynamics of the system by coupling lumped parameter pump and motor models with a one-dimensional unsteady compressible transmission line model including a dynamic model of an accumulator. A semi-anechoic chamber has been designed and constructed for sound intensity measurements that can be used to derive sound power. Sound power measurements were conducted on a series hybrid transmission test bench inside the semi-anechoic chamber in order to study the relationship between sound power and two types of noise sources, fluid and structure borne. The focus of these measurements was to investigate the impact of an accumulator in the high pressure line as well as the influence of varying high pressure line length. Results show a strong influence of changing line length and the addition of an accumulator on pressure ripple, but with little impact on sound power. A high correlation was found between sound power levels and control moment amplitudes on the swash plate. This study demonstrates the usefulness of predicting transmission noise sources, and how this information is beneficial in the design process of a transmission.

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Author Biographies

Richard Klop, Purdue University, Department of Agricultural and Biological Engineering, 225 S. University St., West Lafayette, Indiana 47907, USA

Richard Klop Born on February 18th 1983 in Kalamazoo Michigan (USA). He received his B.S. Degree from Michigan State University, USA, with high honors in Mechanical Engineering in 2005. He received his Doctorate at Purdue University, USA, in Agricultural and Biological Engineering in 2010. After completing his doctorate, he is working for Parker Hydraulic Systems Division. His main research interests are modeling and design of displacement machines and energy efficient fluid power systems.

Monika Ivantysynova, Purdue University, Department of Agricultural and Biological Engineering, 225 S. University St., West Lafayette, Indiana 47907, USA

Monika Ivantysynova Born on December 11th 1955 in Polenz (Germany). She received her MSc. Degree in Mechanical Engineering and her PhD. Degree in Fluid Power from the Slovak Technical University of Bratislava, Czechoslovakia. After 7 years in fluid power industry she returned to university. In April 1996 she received a Professorship in fluid power & control at the University of Duisburg (Germany). From 1999 until August 2004 she was Professor of Mechatronic Systems at the Technical University of Hamburg-Harburg. Since August 2004 she is Professor at Purdue University, USA. Her main research areas are energy saving actuator technology and model based optimisation of displacement machines as well as modelling, simulation and testing of fluid power systems. Besides the book “Hydrostatic Pumps and Motors” published in German and English, she has published more than 80 papers in technical journals and at international conferences.

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Published

2011-11-01

How to Cite

Klop, R., & Ivantysynova, M. (2011). INVESTIGATION OF NOISE SOURCES ON A SERIES HYBRID TRANSMISSION. International Journal of Fluid Power, 12(3), 17–30. Retrieved from https://journals.riverpublishers.com/index.php/IJFP/article/view/460

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