By Xianwu Yang, Shuguang Zuo (auth.)
Proceedings of the FISITA 2012 global car Congress are chosen from approximately 2,000 papers submitted to the thirty fourth FISITA international car Congress, that's held through Society of car Engineers of China (SAE-China ) and the foreign Federation of automobile Engineering Societies (FISITA). This court cases concentrate on strategies for sustainable mobility in all components of passenger motor vehicle, truck and bus transportation. quantity thirteen: Noise, Vibration and Harshness (NVH) makes a speciality of:
•Chassis Vibration and Noise keep an eye on
•Transmission Vibration and Noise keep an eye on
•Engine Vibration and Noise keep an eye on
•Body Vibration and Noise keep an eye on
•Vehicle Vibration and Noise regulate
•Analysis and overview of In-Car Vibration & Noise
•Wind Noise keep an eye on know-how
•Vibration and Noise checking out expertise
Above all researchers, specialist engineers and graduates in fields of car engineering, mechanical engineering and digital engineering will reap the benefits of this e-book.
SAE-China is a countrywide educational association composed of organizations and pros who concentrate on study, layout and schooling within the fields of automobile and comparable industries. FISITA is the umbrella association for the nationwide automobile societies in 37 nations around the globe. It was once based in Paris in 1948 with the aim of bringing engineers from worldwide jointly in a spirit of cooperation to proportion rules and develop the technological improvement of the car.
Read or Download Proceedings of the FISITA 2012 World Automotive Congress: Volume 13: Noise, Vibration and Harshness (NVH) PDF
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Additional info for Proceedings of the FISITA 2012 World Automotive Congress: Volume 13: Noise, Vibration and Harshness (NVH)
Moreover, this means a better conditioning of the inversion matrix and therefore more numerically stable force identification, especially at low frequency. The same behavior is shown when we want to identify interface forces at suspension or wheel-level. Since our main goal is to have more accurate inputs in the low-frequency region, strain measurement can be an attractive approach. An investigation has been carried out to check whether significant changes have to be expected in the structural acceleration measurements on the suspension when the damper is in stick condition.
25) appear from transient response stage to stationary vibration. It is considered that the variations of the frequency are attributed to the nonlinearity of the brake Nonlinear Transient Dynamic Analysis of Disc Brake Squeal 35 Fig. 2: a the conventional Hilbert spectrum; b the improved Hilbert spectrum Fig. 3: a the normal contact force; b the transient non-linear displacement response of pad in the z-direction system that include the friction damping and contact nonlinearity in the present work.
3. A validation is performed in Sect. 4. Estimated wheel-center loads and tire-patch displacements are presented in Sect. 5. 2 Problem Definition A study is undertaken on the target prediction quality in the frequency range of interest to identify the most significant effect in worsening the input estimation procedure. Contribution analyses performed with different tires are compared in terms of prediction accuracy. The estimation error has been quantified as the percentage difference between the RMS values of predicted and measured target response Err ð f Þ ¼ RMSpredict ð f Þ À RMSmeasur ð f Þ 100 RMSmeasur ð f Þ ð1Þ Different tires are coupled to the same vehicle body model used for the load identification procedure to investigate the effect of different tire characteristics.