• Title/Summary/Keyword: Vehicle Seat

Search Result 273, Processing Time 0.023 seconds

A Study about Steering Wheel and Pedal Position of Industrial Vehicle by the Various Body Dimensions (다양한 인체치수에 따른 산업차량의 핸들과 폐달 위치에 관한 연구)

  • Choi, Chin-Bong;Koo, Lock-Jo;Jung, Myung-Chul;Park, Peom
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.29 no.4
    • /
    • pp.1-7
    • /
    • 2006
  • This study determined the optimal positions of the movable steering wheel and pedal systems of industrial vehicle by various body dimensions. The position of objects and starting driving posture were measured by Martin-type anthropometer and goniometer. The X, Y and Z axis of movable steering wheel and pedal systems were measured horizon distance from right side to left side, horizon distance from front side to rear side and vertical distance from floor to ceiling. During the experiment in order to exclude learning effectiveness with forklift driving, 27 subjects who had male not experiences in driving a forklift used in the experiment. The relationship between the position of steering wheel and driver's posture with body dimensions was analyzed by using correlation relation and paired comparison t-test based on the measured data. The pedal location in X and Z axises was not related with various body dimensions. Also, the steering wheel was different among the angles of the right elbow and shoulder depending on the various body dimensions.

Development of Collision Safety Control Logic using ADAS information and Machine Learning (머신러닝/ADAS 정보 활용 충돌안전 제어로직 개발)

  • Park, Hyungwook;Song, Soo Sung;Shin, Jang Ho;Han, Kwang Chul;Choi, Se Kyung;Ha, Heonseok;Yoon, Sungroh
    • Journal of Auto-vehicle Safety Association
    • /
    • v.14 no.3
    • /
    • pp.60-64
    • /
    • 2022
  • In the automotive industry, the development of automobiles to meet safety requirements is becoming increasingly complex. This is because quality evaluation agencies in each country are continually strengthening new safety standards for vehicles. Among these various requirements, collision safety must be satisfied by controlling airbags, seat belts, etc., and can be defined as post-crash safety. Apart from this safety system, the Advanced Driver Assistance Systems (ADAS) use advanced detection sensors, GPS, communication, and video equipment to detect the hazard and notify driver before the collision. However, research to improve passenger safety in case of an accident by using the sensor of active safety represented by ADAS in the existing passive safety is limited to the level that utilizes the sudden braking level of the FCA (Forward Collision-avoidance Assist) system. Therefore, this study aims to develop logic that can improve passenger protection in case of an accident by using ADAS information and driving information secured before a collision. The proposed logic was constructed based on LSTM deep learning techniques and trained using crash test data.

Vehicle Start Control System using Facial Recognition Technology (안면인식 기술을 활용한 차량 시동 제어 시스템)

  • Lee, Min-hye;Kang, Sun-kyoung;Shin, Seong-yoon;Lim, Soon-ja
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2021.10a
    • /
    • pp.425-426
    • /
    • 2021
  • Recently, there have been frequent incidents of talent accidents caused by youth driving without a license. Driving without a license is becoming a hotbed of curiosity and challenge for some young people, and there is a limit to managing smart keys at home to prevent this. Therefore, in this paper, using the facial recognition algorithm, the face of the driver sitting in the driver's seat is compared with the information stored in advance, and the system is designed to control the engine by determining that it is a registered driver. If the registered driver authentication is successful, the matching accuracy and Unlock message are output to the LCD connected to the Raspberry Pi.

  • PDF

Analysis of Planocentric Gear

  • Kim, H.J.
    • Agricultural and Biosystems Engineering
    • /
    • v.7 no.1
    • /
    • pp.13-17
    • /
    • 2006
  • The planocentric gear, known as wobble mechanism, has been used for speed reducing mechanism as an ingenious mechanism. The modem application can be found in the backrest adjusting mechanism of a vehicle reclinable seat, fluid pumps and aircraft hoist and winches. Higher speed reduction ratios, high load capacity, lower weight, and compactness are the main advantages of this gear. This paper presents velocity and static force analysis to investigate the friction lock of the planocentric gear. The rectilinear tooth profile is used to maximize the speed reduction ratio. The equivalent linkage system is used for the analysis of instantaneous motion. As the results, the transmission efficiency of the planocentric gear is found and the friction lock of the system is determined for the friction coefficients of journals. A numerical example that illustrates the developed analysis is presented.

  • PDF

Cam Profile Design for Impulsive Noise Reduction of Automotive Engine Valve Train (자동차 엔진 밸브트레인의 타음감소를 위한 캠 형상 설계)

  • An, Ki-Yong;Kim, Do-Joong
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.14 no.4
    • /
    • pp.139-148
    • /
    • 2006
  • Valve train is one of the important noise sources in idling engines. Valve train noise comes mostly from two different impacts. One is the impact between cam and tappet at the beginning of the valve open period, which is an important source of impulsive noise of valve trains. The other is the impact between valve and valve seat at the closing of the valve open period. In case of mechanical lash adjusters, it is very difficult to control the initial impact. In this paper, we designed various types of cam profiles, especially in the opening ramp design, and investigated the effect of cam profiles on the magnitude of the initial impact. The effects that some cam design parameters have on the impulsive noise are also observed.

Effect of Surface Treatment on Articulation Index for Vehicles (흡음재 처리를 통한 차실내부 음의 명료도 향상에 관한 연구)

  • 이정규;김정태
    • Journal of KSNVE
    • /
    • v.10 no.2
    • /
    • pp.240-246
    • /
    • 2000
  • One of the widely accepted methods for evaluating the interior sound quality of automobiles is Articulation Index(AI). The AI actually measures the articulation level of the sound in the vehicle cabin as passengers talk to one another. In this study, the effect of two different absorption materials inside the cabin on AI has been investigated by ray-tracing method : one is firewall, the other is celling. It turns out that the back seat location is found to be strongly dependent on the type of absorption materials treated at the celling, since the sound absorbing area is different due to the location and the firewall is situated in the "Reverberation Radius". The proposed methdo could be used to improve the sound quality of automobiles at the design stge.sign stge.

  • PDF

Effect of Chassis Flexibility on Ride Quality (샤시의 강성이 운전석 승차감에 미치는 영향 분석)

  • 김광석;유완석;이기호;김기태
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.4 no.2
    • /
    • pp.127-136
    • /
    • 1996
  • Dynamic analysis of a three-axle heavy truck is carried out with rigid body model and flexible body model. To see the effects of chassis flexibility, the chassis is modeled as flexible body. The mass matrix, stiffness matrix, and vibration normal modes of the chassis are obtained by a finite element analysis program, and four vibration normal modes are used in the flexible body model. The vehicle model consisting of a frame, a cab, suspensions, an engine, a deck, a seat, and tires, has total 77 degrees of freedom. The result shows that the peaked acceleration in the flexible model is lower than that of the rigid body model.

  • PDF

Development of a Test Dummy for the Evaluation of Driver's Response to Vehicle Vibration (운전 자세에서의 인체진동 평가용 시험용 더미 개발)

  • 장한기;홍석인;송치문;김기선;이정훈;김광준
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2004.05a
    • /
    • pp.105-108
    • /
    • 2004
  • This paper introduces a process of the development of a vibration test dummy for the posture of inclined seating. Experimental devices was invented to measure apparent mass curves on the contact point of the hip and the back of a seated human body. During the excitation of a rigid seat secured to a hydraulic exciter, force and acceleration signals were measured on the contact points to determine the apparent mass. In order to describe nonlinear characteristics of a human body, seven levels of Gaussian random signal were used for the base excitation. The modeling of the human body will be performed using measured apparent mass curves. The modeling will be done by June and the prototype of the test dummy will be invented in the following six months.

  • PDF

Vibration Isolation System for Driver's Seats with Negative Stiffness (운전자용 의자의 부강성 진동 절연 시스템)

  • Park, Sung-Tae;Lee, Sang-Joo
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.18 no.2
    • /
    • pp.114-121
    • /
    • 2010
  • As a vehicle speed increases, more vibration energy is transmitted from chassis to a driver. Current isolation system for the driver's seat by damping control can reduce the transmitted vibration energy near resonance area. But in higher frequency region than natural frequency multiplied by $\sqrt{2}$, the vibration energy transmitted to the driver has a tendency to be increased. Therefore, the method by natural frequency reduction of the system is preferred to increase the effectiveness of the anti-vibration. However, the natural frequency could not be freely reduced due to the nature of the isolation system structure. A new passive suspension system to reduce the natural frequency is proposed. The theoretical analysis and experimental results show better vibration attenuation compared with the current isolation system.

Experimental Study on the Small Overlap Frontal Crash Test Method (국부정면충돌 시험방법에 관한 실험적 연구)

  • Kim, Dea Up;Woo, Chang Gi
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.26 no.2
    • /
    • pp.205-213
    • /
    • 2017
  • In order to improve occupant protection in frontal crash, the IIHS introduced a small overlap frontal crash test in 2012. When the front corner of a car collides with another car or object, such as utility pole the test replicated the sequence of events. Because occupants move simultaneously forward and toward the side of the vehicle this test is challenging for some airbag and safety belt designs. In the small overlap frontal test, a car travels at 64 km/h toward a rigid barrier. A hybrid III dummy is positioned in the driver seat. 25% of the total width of the car strikes the barrier on the driver side. After review of small overlap frontal test protocol and overall rating, six run-throughs were performed according to the original test method.