Development and Performance Evaluation of an MR Fluid Variable Damping Force Rotary Damper

Yukihiro Hanajima (THK)

In recent years, advances in vehicle motion control have increased the performance requirements for variable damping-force dampers. In this study, an MR fluid variable damping-force damper has been developed by combining a rotary damper with MR fluid and applying a magnetic field, achieving a wide range of damping-force control and compact size. In this report, the performance was evaluated through bench tests and vehicle tests.

Theoretical Analysis and Experimental Verification using Test Bench of Jacking Characteristics during Cornering

Masaki Yamamoto (Kanagawa Institute of Technology)･Motoshi Ohki (Toyota Motor)

Jacking characteristics during steady-state cornering are analyze theoretically, covering not only independent suspension systems but also rigid suspension systems, such as those using torsion beam type. Furthermore, the experimental method using a test bench that is unaffected by road surface inputs to verify the relationship between suspension type and jacking characteristics.

Development of an Edge Device and Cloud Environment for Replica Vehicle Implementation

Seungwan Son･Daejin Kim･Seungyong Bae (Hyundai Motor)･Minchul Lee (ACEWORKS)

To support the establishment of vehicle durability targets using data from a large fleet, an AI-based virtual sensor was developed to enable the creation of a replica vehicle. An Edge Device was implemented to provide an onboard development environment, built on the ROS framework, enabling machine learning model development using CAN RAW data and measurement data. These models facilitated the estimation of suspension transfer loads. Furthermore, a cloud-based development environment was constructed to support scalable data acquisition, model training, and load prediction, contributing to reliable and data-driven durability evaluation.

Path following Control for a Large Bus Based on a Vehicle dynamics Model Considering Road Curvature and Cant

Tomoki Arita･Ryosuke Sakurai･Toshiyuki Sugimachi･Toshiaki Sakurai･Shuichi Yahagi (Tokyo City University)･Fujio Momiyama･Keiji Aoki (ASMobi)

In steering control for buses, it is important to design a control system that considers vehicle characteristics. In this study, a vehicle dynamics model of a large bus considering road curvature and cant was constructed, and a model-based Path Following control system was designed. Furthermore, simulations with crosswind disturbances were conducted to evaluate the control performance of the proposed control system and its robustness under crosswind conditions.

Modal Analysis of a Simplified Motorcycle Model During Turning Motion

Junji Hirasawa (Ibaraki KOSEN (College of Technology))

This study aims to establish a novel and simplified motorcycle model. Since the Sharp motorcycle 4DOF model, which assumes straight running near the upright position, has limitations in analyzing turning motion, a novel model is developed based on a motorcycle turning with a reference roll angle, and modal analysis is conducted.