Improvement of vehicle stability by reaction force control on accelerator pedal and steering wheel

2010 ◽  
Author(s):  
Hiraku Ogura ◽  
Toshiyuki Murakami
Keyword(s):  
Force Control ◽  
Reaction Force ◽  
Steering Wheel ◽  
Vehicle Stability ◽  
Accelerator Pedal

scholarly journals Development of Velocity Guidance Assistance System by Haptic Accelerator Pedal Reaction Force Control

2012 ◽  
Vol 5 (1) ◽  
pp. 86-97 ◽  
Author(s):  
Feilong YIN ◽  
Ryuzo HAYASHI ◽  
Pongsathorn RAKSINCHAROENSAK ◽  
Masao NAGAI
Keyword(s):  
Force Control ◽  
Reaction Force ◽  
Assistance System ◽  
Accelerator Pedal

scholarly journals A Sensaptic ADAS Device Using Shape Memory Alloy Wires: Design and Control

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3494
Author(s):  
Deivamoney Josephine Selvarani Ruth ◽  
Kaliaperumal Dhanalakshmi ◽  
Seung-Bok Choi
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Haptic Feedback ◽  
Reaction Force ◽  
Vehicle Speed ◽  
Accelerator Pedal ◽  
Integrated Sensor ◽  
Electronic Throttle ◽  
Position Sensing ◽  
Active Sensor

This paper presents an active accelerator pedal system based on an integrated sensor and actuator using shape memory alloy (SMA) for speed control and to create haptics in the accelerator pedal. A device named sensaptics is developed with a pair of bi-functional SMA wires instrumented in a synergistic configuration function as an active sensor for positioning the accelerator pedal (pedal position sensing) to control the vehicle speed through electronic throttle and as a variable impedance actuator to generate active force (haptic) feedback to the driver. The reaction force emanated from the pedal alerts the driver and takes appropriate control action by slowing down the vehicle, in harmony with the road’s condition. The design is developed as a proof-of-concept device and is tested and evaluated in a real-time common rail diesel system for rail pressure regulation and over speeding tests, and the responses and performances are found to be promising.

Voice Information System Adapted to Driver's Mental Workload

2002 ◽  
Vol 46 (22) ◽  
pp. 1871-1875 ◽  
Author(s):  
Yuji Uchiyama ◽  
Shin-ichi Kojima ◽  
Takero Hongo ◽  
Ryuta Terashima ◽  
Toshihiro Wakita
Keyword(s):  
Information System ◽  
Adaptive Systems ◽  
Mental Workload ◽  
Memory Task ◽  
Correlation Coefficients ◽  
Test System ◽  
Steering Wheel ◽  
Accelerator Pedal ◽  
Driver Workload ◽  
Vehicle Information

There is a risk that voice messages from in-vehicle information systems may cause a driver to be distracted while driving. To avoid such a risk the message systems need to be adapted to drivers' mental workload. Such adaptive systems deliver voice messages when drivers' mental workload is low and postpone the messages when the driver workload is high. It is important for the system to estimate the current driver workload from car sensors such as car speed, steering wheel angle, accelerator pedal position and so on. In order to find some relations between the driver's mental workload and the data from car sensors, a dual task experiment was conducted on a public road. In the experiment, participants performed a memory task while driving an experimental car. At the same time, the data from the car sensors were recorded. The correlation coefficients between the memory task performance and the data from car sensors showed that release of the accelerator pedal was the most significant indicator of workload. Based on these results a workload estimator was developed, which has been applied to a voice information delivery test system. The potential of a voice information system that adapts to the driver's mental workload was evaluated.

Tractor Cab Virtual Modeling and Ergonomic Evaluation Based on JACK

2018 ◽  
Author(s):  
Yiwei Wu ◽  
Zhili Zhou ◽  
Zhiqiang Xi ◽  
Jishun Li
Keyword(s):  
Visual Field ◽  
Virtual Environment ◽  
Good Condition ◽  
Steering Wheel ◽  
Control Panel ◽  
Accelerator Pedal ◽  
Gear Shift ◽  
Clutch Pedal ◽  
Lower Back ◽  
Ergonomic Evaluation

Aimed at the drawbacks of traditional method of spot evaluation for tractor cabs, such as low effectiveness and high expense, this paper established a new method of tractor cab design and evaluation, which included formulating ergonomic evaluation process, creating virtual models of tractor cab and operators, building virtual environment of tractor cab man-machine system and conducting ergonomic evaluation. The YTO-1604 wheeled tractor has been taken as the analysis object, the layouts of its seat, accelerator pedal, clutch pedal, brake pedal, gear shift lever, steering wheel and other major parts were optimized. The optimized model was created by UG, then it was imported into JACK, thus the object for analysis was created. To accommodate the Chinese tractor operator population, the 95th, 50th and 5th percentile virtual operator models which respectively stands for the big figure, medium figure and small figure of Chinese adult males for ergonomic evaluation were created in JACK, and the angular comfort range for human body joints were determined. The 50th percentile operator was adjusted to a cozy posture through human control module, with hands holding steering wheel, left foot naturally put on clutch pedal, while right foot flat placed on the floor. The operator was located to the h point of seat in the optimized cab model, thus the man-machine virtual environment was completely built. Then the reach zone of the 5th percentile operator and the visual field of the 95th percentile operator were generated, the 95th percentile operator’s comfort was evaluated and the forces of the 95th percentile operator’s spinal L4/L5 were calculated. The results showed that the gear shift lever, steering wheel and control panel were located in the accessible reach zones, conforming to manipulation requirements. Control panel and windshield (except for part of the side windshield which could be observed by moving head) were contained in the visual field, according with vision design standard. The overall comfort score of the 95th percentile operator’s different body parts was 24.5, which indicated that the operator was in good condition and the design conformed to physiological requirements. The lower back compression force of the 95th percentile operator was 742, representing a nominal risk of lower back injury for operators. Thus, the rationality of cab layout scheme was well verified. This paper provides a method for the ergonomic design and evaluation of tractor cabs.

Feasibility Examinations of a Driver Support System With Accelerator Pedal Force Feedback and Driving Force Control Functions

2005 ◽  
Author(s):  
Nobuyuki Kuge ◽  
Tomohiro Yamamura ◽  
Takeshi Kimura ◽  
Yosuke Kobayashi ◽  
Nichols J. Ward ◽  
...  
Keyword(s):  
Support System ◽  
Force Control ◽  
Driving Force ◽  
Force Feedback ◽  
Accelerator Pedal ◽  
Pedal Force ◽  
Control Functions ◽  
Driver Support System ◽  
Driver Support
Sign in / Sign up

Export Citation Format

Share Document