Vibration Analysis of Tire Using Compressed Sensing DIC

Yuki Kato (Kochi University of Technology)･Soma Watahiki (Kozo Keikaku Engineering)･Masayoshi Otaka (Ono Sokki)･Mitsuki Togoshi (Kozo Keikaku Engineering)･Yoshiho Oda (Ono Sokki)

Running tires exhibit complex vibration behavior due to excitation forces from the road surface and engine. However, it is difficult to measure vibration using a contact sensor with a cable because the tire is a high-speed rotating body. In this study, we developed a method to measure detailed vibration shapes and spectra of tires using compressive sensing and digital image correlation.

Experimental Analysis Method of Sprung Vibration Characteristics for Suspension Inputs
-Vehicle Electrification Impact Analysis Including Longitudinal and Lateral Inputs-

Tsuyoshi Yoshimi･Shingo Koumura (Toyota Motor)

For efficient development of ride comfort performance, it is useful to have analysis technology that separates the input from unsprung to sprung and the sprung response characteristics caused by elastic deformation of the body, etc. In this paper, we have developed a method to measure the sprung response characteristics not only for vertical inputs, but also for longitudinal and lateral inputs, and verified the usefulness of this method by considering the changes in response characteristics due to electrification of vehicle.

Vibration sensation evaluation based on a reproduction of vehicle vibration using a vibration exciter

Sota Tanaka･Gen Tamaoaki (Tokyo Metropolitan University)･Shuya Nojima･Hirotaka Shiozaki (Mitsubishi Motors)･Takuya Yoshimura (Tokyo Metropolitan University)

We investigate which directional components of vehicle vibration contribute to ride comfort by evaluating them through vibration experiments that simulate vehicle vibrations using a 6-axis exciter. Subjects seated on an automobile seat are excited by the following vibrations and evaluate their ride comfort. The base vibration is the vehicle vibration measured while the automobile traveled on a rough road. Adjusted vibrations are vibrations created by increasing or decreasing one directional component of the base vibration. Corrected vibrations are vibrations modified by other directional components to compensate for the loss of vibration power caused by a decrease in the directional component.