Experience with the IMMa tyre test bench for the determination of tyre model parameters using genetic techniques

摘要

The study of tyre behaviour is an interesting area in vehicle dynamics research. There are a great number of researchers working in this area. So knowledge of the tyre properties is necessary to design vehicle components and advance control systems properly. For that purpose, mathematical models of the tyre are used in vehicle simulation models. Semiempirical models can be used for this. These kinds of tyre model use a certain number of parameters that define them. Semiempirical models need to fit measurement data to the tyre properties that they define. The determination of these sets of parameters and the measurement data obtained are dealt with in this paper. A new method based on genetic techniques is used to determine these parameters. The main advantages of the method are its simplicity of implementation and its fast convergence to an optimal solution, with no need for an extensive knowledge of the searching space. So, to start the search, it is not necessary to know a set of starting values of the parameters that define the tyre model. A set of measurements that define several tyre properties are obtained on the IMMa tyre test bench. These measurement data are used to compare with results from the method proposed, and a new mutation procedure has been developed.