• Title/Summary/Keyword: Suspension noise

Search Result 344, Processing Time 0.026 seconds

Oral contrast media for computed tomography of canine pancreas

  • Choi, Jihye;Chang, Jinhwa;Oh, Sunkyoung;Yoon, Junghee
    • Korean Journal of Veterinary Research
    • /
    • v.51 no.2
    • /
    • pp.165-169
    • /
    • 2011

  • Barium suspension, oral iodine contrast medium and water were applied in eight dogs to evaluate (1) distension of gastrointestinal tract, (2) the effect of the oral contrast media on the identification of the pancreas from surrounding organs, and (3) image quality and the presence of artifacts in canine pancreas computed tomography (CT) images. Oral iodine contrast medium, gastrografin, produced significant artifacts that deteriorated the CT images of the pancreas. The use of water did not provide the fullness of the gastrointestinal lumens. Barium suspension was effective for the identification of the pancreas from the surrounding gastrointestinal tract, without significantly increasing image noise. Barium suspension can be used as an optimal contrast medium that will not cause an adverse effect on the pancreatic density and image quality.

  • https://doi.org/10.14405/kjvr.2011.51.2.165 인용 PDF KSCI

High-performance Magneto-rheological Damper Design (고성능 MR댐퍼의 설계)

  • 이종석;백운경
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.14 no.6
    • /
    • pp.470-477
    • /
    • 2004

  • This study shows the design process of a MR damper for semi-active suspension systems. Damping force characteristics of the designed damper was predicted through the flow analysis and magnetic analysis. The predicted results were compared with the experimental results and the initial design specification was modified according to the results.

  • https://doi.org/10.5050/KSNVN.2004.14.6.470 인용 PDF KSCI

Low Frequency Vibration of the Sprung Mass on Front Outer Wheel in Cornering (선회 시 차량의 외측전륜 스프링 상질량의 저주파 진동)

  • Lee, Byung-Rim;Lee, Jae-Eung
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2000.06a
    • /
    • pp.1889-1893
    • /
    • 2000

  • During the test drive of developing vehicle, a low frequency vibration of sprung mass on front outer wheel has been frequently observed in cornering with some speed. The purpose of this paper is to investigate the low frequency vibration of the sprung mass. The analysis result shows that the low frequency vibration is caused by sudden migration of the center of gravity of vihicle and it is determined by geometric points of suspension.

  • PDF

A Study on Estimation of Coefficient Using Wavelet Transform and Its Application to the Evaluation of Harshness in Passenger Car (웨이브렛 해석을 이용한 승용차의 충격 하쉬니스 개선)

  • Lee, Sang-Kwon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2000.06a
    • /
    • pp.1710-1715
    • /
    • 2000

  • Estimation of damping ratio for vibration signals measured on the passenger car's seat is useful for the objective evaluation of impact harshness in car. The vibration signal is a transient signal represented by many coupled modes of suspension system. Wavelet transform automatically decouples these modes in the time-frequency domain. Damping ratios for decoupled modes are obtained by logarithmic treatment for the Wavelet transformed signal. The objective evaluation using Wavelet transform has been well corresponded with subjective evaluation done by skilled engineers.

  • PDF