Identification of a nonlinear spring and damper characteristics of a motorcycle suspension using test ride data
T. Lauß, D. Sterl, S. Oberpeilsteiner, W. Steiner - Identification of a nonlinear spring and damper characteristics of a motorcycle suspension using test ride data - 89th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM), München, Deutschland, 2018
During test rides of motorcycles modifications are made to the suspension. In order to quantify those changes, the nonlinear
spring and damper characteristics must be determined. This is usually done on a test bench. However, measurements on a test
bench are closely related to high costs and high time exposure. Hence, a parameter identification after a test run, formulated
as an optimization task, seems to be an auspicious approach. For this purpose a cost function is defined, which is minimized
by considering the dynamics of the system. The strength of the contribution is the efficient gradient computation using the
adjoint variable approach. In order to approximate the nonlinear spring and damper characteristics cubic splines are used.
The values of the spline functions at specified grid points (knots) are adjusted such that the deviation between simulation and
measurement is minimal.