Nonlinear vibration of semitrailer suspension: wavelet and multiscale entropy-based approaches

• DOI: 10.1007/s00419-015-1060-1
• Publication Date: 2015-09-11T08:53:37Z
• Authors: Grzegorz Koszalka; Jacek Hunicz; Andrzej Rysak; Grzegorz Litak
• Keywords: [SPI] Engineering Sciences [physics]; Entropy; Automobile suspensions; Vehicle suspensions; 02 engineering and technology; Wavelets; [SPI]Engineering Sciences [physics]; Wavelet transforms; Vibrations (mechanical); 0203 mechanical engineering; Non-linear vibrations; Amphibious vehicles; Vertical accelerations; Suspension dynamics; Vibration analysis; Mechanical Engineering; Vehicle transmissions; Vehicles; Roads and streets; Fourier series; Multi-scale entropies; Acceleration time series; Road profile; Magnetic levitation vehicles; Dynamical response

We examine the dynamical response of a semitrailer suspension to a real road profile under two different loads. The trailer is a low loader for transporting heavy and large loads, the configuration of which can be adjusted as desired. Experiments are performed on both unladen and 57-ton laden trailers. The acceleration of unsprung and sprung parts of the vehicle is measured. The obtained acceleration time series are then analyzed using the Fourier and wavelet transforms as well as the multiscale entropy approach. The data analysis results reveal transmission of suspension vibration and complexity of vehicle vertical acceleration as a response to the road profile. © 2015, The Author(s).