| No. | Video | Title･Author (Affiliation) |
|---|---|---|
| 1 | ◯ |
Vehicle Dynamics Simulation taking into considerations of pneumatic brake system for Autonomous driving of Heavy-Duty Vehicle Hiroo Yamazaki･Katsuya Yashiro･Yoshiki Watanabe (UD Trucks) It is difficult to perform tests using actual vehicles in low adhesion conditions between tire and road surface or critical situations and/or worst cases. To confirm above requirements with keeping safety, the modeling for nonlinear tire model, nonlinear pneumatic model for braking system and modeling for parking brake system are done and the vehicle dynamics simulation are developed considering above characteristics. In this study, modeling for parking brake for heavy duty vehicles were performed. Modeling for contact force for parking brake system taking into consideration for spring braking force was done and those simulations were performed. |
| 2 | ◯ |
Development of Traction Control Method using Fluctuation Information of Rotational Velocity of In-Wheel Motors Masaru Yamasaki･Toshiyuki Ajima･Wataru Hatsuse (Hitachi) To improve vehicle stability on slippery road surfaces, we developed a new traction control system that estimates the slip rate based on the relationship between the torque and the fluctuation of the rotation speed of the in-wheel motor. In this presentation, report the principle of the control method, its implementation method, and the results of verification of its effectiveness on a test vehicle. |
| 3 | ◯ |
Development of Damping Control for Vertical Vibration Using Driving Force of In-Wheel Motors to Improve Passenger Comfortability Naoki Hatta･Masaru Yamasaki･Toshiyuki Ajima (Hitachi)･Sakahisa Nagai･Hiroshi Fujimoto (The University of Tokyo) In-wheel motors (IWMs) can utilize larger drive reaction forces for controlling sprung mass motion compared to conventional drive systems that use a drive shaft, since the driving force of IWMs directly acts on the tire contact surface. In this study, we design a controller aimed at enhancing damping effects in the 4 - 8 Hz frequency range, known to cause discomfort for passengers, by analyzing sensitivity and Nyquist plot. The effectiveness of the controller was validated through vehicle testing. |
| 4 | ◯ |
Driving stabilization technology using Model Predictive Control including Reference Vehicle Model Hiroki Obara･Shinji Ishihara (Hitachi)･Atsushi Yokoyama･Hiroki Sonoda･Yuichiro Minakuchi･Yusuke Honjo (Hitachi Astemo) We have developed the driving support function that cooperates multiple actuators to improve driving stability. This paper shows the driving stabilization technology that modifies the reference vehicle state in the prediction to the value that does not exceed the vehicle limit by having a reference vehicle model in the model predictive control, in order to realize the vehicle behavior based on driver operation while maintaining stable driving. |
| 5 | ◯ |
Influence of Trail Braking Maneuver on Vehicle Cornering Behavior Ikkei Kobayashi･Fumiya Yoshida･Liting Fu･Wenbao Wu･Jumpei Kuroda (Tokai University)･Kazuki Ogawa (Aichi University of Technology)･Peeie Heerwan Bin Mohamad (University Malaysia Pahang)･Hideaki Kato･Takayoshi Narita (Tokai University) Trail braking is a maneuver in which a vehicle is given brake torque and steering simultaneously. This maneuver is used in race cars when deceleration is required at corners, and it significantly affects the vehicle's cornering behavior. In this study, we will report on the analysis method and results of the effect of trail braking on roll and pitch dynamic and stability and control. |
| 6 | ◯ |
A Basic Study on Meandering Motion of Multi-Articulated Vehicle Sunao Chikamori (Former Job : Seikei Uniersity) Since we judged that the meandering motion that occurs in multiple articulated vehicles is one of the problems that must be solved, we decided to elucidate the mechanism of this movement and consider the direction of the solution. |