Vehicle Dynamics Performance Prediction by Integrating a Driving Simulator and Brake HILS

Kota Akiyama･Ryosuke Ide･Yoshinori Maeda (Toyota Motor)･Kentaro Takechi･Miku Kawai (Toyota Technical Development)

This study proposes an integrated evaluation environment combining a driving simulator with a brake hardware-in-the-loop system to predict vehicle dynamics performance at an early development stage. As a case study, traction control performance was evaluated under split-μ road conditions. By incorporating real brake ECUs and actuators, realistic control behavior was reproduced. The results demonstrate that the proposed environment enables trade-off analysis between stability and acceleration performance, reducing reliance on vehicle testing.

Numerical simulation on the effect of body stiffness on vehicle dynamic behavior considering detailed tire model

Haruki Honda･Haruya Oshita･Kenji Yoshida (Hiroshima Institute of Technology)

In this study, numerical simulation on the effect of body stiffness on vehicle dynamic behavior considering a four-wheel model with a detailed tire model are carried out. The target vehicle is FSAE car in our university. Focusing on the transient behaviors in response to steering and braking inputs, this study clarifies the influence of body deformation on tire slip angle and load changes on vehicle dynamics, and quantitatively demonstrates the necessary and sufficient body stiffness.

Development of an Objective and Quantitative Evaluation Method for the Dynamic Support Performance of Seats During Driving

Hideaki Shibue (S&VL)

This study aims to establish a new method for objectively and quantitatively evaluating seat performance during driving. We constructed a framework that integrates measurements of the driver’s body movements, steering force, and grip force to quantify the dynamic support characteristics of the seat. Through driving simulator experiments, we identified differences in seat characteristics and demonstrated the effectiveness of this method.

Development of 3-wheel EV vehicle Durability Mode Through Local Measurement in India

Seungyong Bae･Daejin Kim･Seongwoo Kim･Miyong Lee･Seungwan Son･Donghyun Ha･Damhyun Kim･Gyunam Park･Jaewan Kwon･Junwoo Chung (Hyundai Motor)

The company is pursuing the development of a three-wheeled electric vehicle to enter the Indian market and has set securing durability performance as a key task. This study aims to improve vehicle design and verification efficiency by developing a TDP that reflects the driving conditions in India. It sets durability targets, sets road ratios, constructs routes, sensors, and measures. Accelerated durability testing scenarios were developed using competitor testing routes. Finally, three types of TDPs were constructed for the combined actual road, unpaved road, and Rig test conditions to establish a durability evaluation system.

A Control Method for Enhancing Vehicle Handling and Stability via Driving and Braking Force Distribution Based on Vehicle Sideslip Angular Velocity

Shoma Baba･Kaoru Sawase･Hiromitsu Toyota･Ryosuke Koga･Kazunori Kawai (Mitsubishi Motors)

Electric vehicles can achieve high handling performance owing to their high flexibility in longitudinal force control and fast response characteristics. However, rear-wheel instability may occur under low-friction or rough road conditions. To address this issue, a novel control law is introduced in addition to conventional yaw-rate feedback control, which constrains the vehicle sideslip angular velocity within a specified range. The proposed control method is demonstrated to improve both steering response and vehicle stability under low-friction road conditions.

Damping Ratio Control in the Linear Region of Vehicle Dynamics

Naoto Ohkubo･Ryo Koyama･Fumiaki Honjo (Honda R&D)

This study proposes a control method that enables arbitrary adjustment of the damping ratio by applying a direct yaw moment through longitudinal forces, without altering the steady-state gains of yaw rate and sideslip angle or the natural frequency. Furthermore, the effectiveness of the proposed method, which is designed to vary only the damping ratio, is verified through simulations.

Analysis of driving and dynamic characteristics of BEV trucks considering loading conditions

Kazumasa Takahashi･Takayoshi Kamada (Tokyo University of Agriculture and Technology)

This study investigated the dynamic characteristics of small BEV trucks to contribute to the development of safe and reliable vehicle control systems. Since truck behavior is expected to change depending on cargo loading conditions, five different loading conditions were considered in the analysis. Under each condition, the steering response characteristics of a conventional small internal combustion engine truck and a small BEV truck were compared. The results provide insight into how electrification and load distribution influence vehicle motion characteristics and handling performance, which are important factors in the design and evaluation of future vehicle control technologies for commercial trucks.