Development of Energy Transmissibility Model for Three-Degree-of-Freedom Vehicle Dynamics

Atsushi Kosegawa (Graduate School of Kanagawa University)･Toru Yamazaki･Kai Kurihara･Kazurou Iwata (Kanagawa University)

This study proposes a novel approach that applies energy transmissibility models to conventional vehicle dynamics models used for evaluating steering characteristics, steering response, and straight-line stability, in order to describe these phenomena from an energy-based perspective. Furthermore, the effects of changes in vehicle mass on steering response under various steering characteristics are described using the energy transmissibility model.

Dynamic Evaluation of Straight-Line Stability and Steering Components Based on an Energy Transmissibility Model

Toru Yamazaki (Kanagawa University)･Atsushi Kosegawa (Graduate School of Kanagawa University)･Kai Kurihara･Kazuro Iwata (Kanagawa University)

The energy transmissibility models of planar motion and roll motion are applied to a vehicle dynamics model to evaluate the influence of roll disturbances on straight-line stability from an energy-based perspective. In addition, by incorporating a model that accounts for the effects of hub bearings, which significantly influence the vehicle's steering response, the system is analyzed from an energy viewpoint to derive new design guidelines.

Coordinated Control of Driving/Breaking and Steering for Vehicle Stability Improvement on Split-μ Roads.

Hiroki Kamiya･Akira Ito (Aichi Institute of Technology)

This study proposes an MPC-based control method to improve vehicle stability on split-μ roads by coordinating driving/braking forces and independently controlled steering. The control utilizes road surface friction information predicted in advance by external sensors to achieve cooperative control.

Study of the Torsion Bar Stiffness Design of Electric Power Steering System

Takashi Miyoshi (Honda Motor)

In this study, we investigated the characteristics of a closed loop that combines an EPS system with a two-wheel model in order to express the sensory evaluation of the effect of enhancing the torsion bar stiffness of the EPS system. In this characteristic calculation, we obtained a design guideline for the torsional stiffness of the torsion bar of the torque sensor.　Furthermore, the suggested system was installed into a vehicle and its effectiveness is confirmed.