title: Vehicle unpaved road response spectrum acquisition based on accelerometer and GPS data.
abstract: This paper describes a response acquisition system composed of some spindle accelerometers and a time synchronized on-board GPS receiver developed in order to collect the dynamic response of vehicle riding on an unpaved road. A method of time-space conversion for calculating the response spectrum is proposed to eliminate the adverse effect of time-varying speed, based on the transform from the equitime sampled spindle acceleration responses to equidistance sampling. By using two groups of independent distance histories acquired from GPS, a method called long-range error correction is proposed to improve the accuracy of the vehicle's distance information, which is critical for the time-space conversion. The accuracy and limitations of the system have been analyzed, and its validity has been verified by implementing the system on a wheel loader for road response spectrum measuring. This paper offers a practical approach to obtaining unpaved road response spectra for durability road simulation.
authors.affiliation: College of Mechanical Engineering and Automation, National University of Defense Technology, Changsha, Hunan 410073, China. congnan.cn@gmail.com
authors.forename: Nan
authors.initials: N
authors.lastname: Cong
authors.forename: Jianzhong
authors.initials: J
authors.lastname: Shang
authors.forename: Yanxi
authors.initials: Y
authors.lastname: Ren
authors.forename: Yao
authors.initials: Y
authors.lastname: Guo
keywords: GPS; durability test; road response spectrum; road simulation; sensor fusion