• 산업경영시스템학회지
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• 제14권23호
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• pp.37-46
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• 1991

This study deals with the designing of vehicle pedal considering simple reaction time of visual information. Because vehicle accidents may bring about fatal results, the vehicle design which is considered with safity is very important. Though the vehicle design considered with safity is important in the whole parts of vehicle, the designing of pedal which is directly connected the designing of pedal which can minimize reaction time to risk through simple experiments. In the experiments, the experience of driving, the location of brake pedal and the space between brake and accelerator pedal are considered. Using experiment equipment and IBM-PC, simple reaction time was measured. The data which was result from measurement was analyzed with SPSS/PC+. When brake pedal located right side and the space between brake and accelerator pedal was 35cm, reaction was minimized. Based on this results, the vehicle pedal should be designed.

• 대한안전경영과학회지
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• 제14권4호
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• pp.93-105
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• 2012

The purpose of this study was to investigate drivers' postures in different car pedal systems and skilled levels under fatigue. Twenty four subjects participated in this experiment. For three-dimensional analyses, six cameras (Proreflex MCU-240, Qualisys) were used to acquire raw data. The parameters were calculated and analyzed with Visual-3D. In conclusion, ROAs of two leg-pedal system were less than one leg pedal system by pattern analysis. Through statistical tests, skilled levels have effects on ROAs(X, Y, Z) of ankle joint at breaking a pedal and ROAs(Y, Z) of ankle joint at accelerating a pedal. Also, car pedal systems have effects on ROAs(Y, Z) of ankle joint, and ROA(Z) of knee joint at accelerating a pedal. In addition, skilled levels and car pedal systems (cross effects) have an effect on ROA(Z) of ankle joint. These findings suggested that we should improve a present single pedal system.

• 한국생산제조학회지
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• 제25권2호
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• pp.138-142
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• 2016

In this study, a strength analysis was performed to assess die-cast aluminum alloy brake pedals as an improved alternative to wrought alloys. Aluminum brake pedal shapes are considered to be suitable for the die-casting process. The strength criterion of Volvo trucks was used as the criterion for the pedal strength. The results of this analysis showed that the frame thickness of the aluminum brake pedal must be increased from 12 mm to 18 mm to have a strength superior to that of a steel brake pedal. Additionally, the stress and weight of the aluminum brake pedal were found to be approximately 24% and 26% lower than those of the steel brake pedal, respectively. Mounting tests and strength assessments verified that the proposed die-cast aluminum alloy brake pedal demonstrated sufficient strength.

• 대한안전경영과학회지
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• 제14권2호
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• pp.11-22
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• 2012

The purpose of this study was to compare drivers' postures with different car pedal systems and skilled levels. Fourteen subjects participated in this experiment and for three-dimensional analyses, six cameras (Proreflex MCU-240, Qualisys) were used to acquire raw data. The parameters were calculated and analyzed with Visual-3D. In conclusion, the patterns of pelvic, hip, knee and ankle joint angles were different as to pedal systems and skilled levels, and distal joints ROA pelvis have large angles. ROA(range of angle) of a double pedal system was small, but ROA of a single pedal system was large. These findings suggested that we should improve a present single pedal system.

• 한국정밀공학회지
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• 제24권3호
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• pp.76-83
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• 2007

The Taguchi method is applied to obtain the optimal design of an automotive pedal arm in consideration of the stiffness test specification. Design parameters are defined to describe shape of the pedal arm. Volume, maximum Von-Mises stress and maximum displacement of the pedal arm are established as the smaller-the-better characteristics. Optimal parameters are determined on the basis of the analyzed level averages of the characteristics.

• 한국정밀공학회지
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• 제26권7호
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• pp.105-111
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• 2009

This study was carried out to evaluate structural stability of the suspended plastic pedal used in vehicles and to predict its fatigue life with the results obtained from finite element analysis. And also shape optimization was performed to reduce its weight. Structural analysis of the suspended plastic pedal was based on the evaluation tests such as static test, stiffness test, and fatigue test in the actual field, which were frequently carried out in the companies manufacturing plastic pedals. The evaluation for the plastic pedal was carried out by structural and fatigue analyses using a commercial FEA program and according to it, maximum stress and strain and fatigue life of the pedal satisfied all the requirements in the evaluation tests. The results of structural analysis of the suspended plastic pedal were used in the fatigue analysis. Fatigue test was performed to verify validity of the theoretical fatigue life of the plastic pedal. And the life by theoretical calculation was in good agreement with that by the experiment. Object function for optimizing shape of the plastic pedal is its volume, and total volume of the plastic pedal was reduced to about 11.7% through shape optimization.

• 대한기계학회논문집A
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• 제40권11호
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• pp.963-970
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• 2016

본 연구는 가속페달에 반력을 생성하여 운전자의 경제운전을 유도하기 위한 에코페달의 설계와 성능 검증을 다룬다. 에코페달의 제어로직은 사전에 설정된 "허용가속도"를 바탕으로 현재 속도에서 허용되는 연료소비량을 정하고 이를 실제 연료소비량과 비교하여 에코페달의 작동을 결정하는 방식을 제안하였다. 폐달 반력은 운전자가 충분히 인지하되 불쾌감을 느끼지 않아야 하며, 차량의 정상 거동에 간섭이 없어야 한다. 스텝형과 램프형 반력 등과 같이 페달 답력이 급속하게 증가하는 형태의 반력은 반력 작동이 멈춘 직 후 운전자의 답력에 의한 급작스러운 가속 현상 때문에 적용이 어렵고, 이러한 문제가 없는 진동형 반력을 채택하였다. 진동형 반력의 주파수, 진폭, 작동시간은 운전자의 주관적 평가와 연비 향상 효과를 고려하여 결정하였다. 본 연구에서 제안된 에코페달을 차량에 장착하여 주행시험을 실시한 결과 고속도로와 시내주행에서 각각 13%와 15%의 연비향상 효과를 보여주었다.

• 한국섬유공학회:학술대회논문집
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• 한국섬유공학회 2003년도 The Korea-Japan Joint Symposium
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• pp.79-80
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• 2003

In order to develop an indoor assistive mobility equipment, we paid attention to the mechanism of locomotion in a snail, or a terrestrial gastropod molluscs. It is known that the snail moves by propagation of a pedal wave generating on a pedal surface of the snail and a pedal locomotion has flexibility far ground condition. An air mattress with a function of a pedal-like locomotion mechanism was developed and the performance of the pedal locomotory air mattress as mobility equipment was discussed.

• International Journal of Automotive Technology
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• 제6권4호
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• pp.391-402
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• 2005

Despite its superior braking performance to conventional vehicles on test tracks, the performance of the ABS-equipped car seems disappointing on real highway. The poor braking performance results from questionable design of the human-machine interface(HMI) of the brake system. Force-displacement relation at the brake pedal has a strong effect on the braking performance. Recently developed brake-by-wire (BBW) system may allow us to tailor the force feel at the brake pedal. This study aims at exploring analytical ways of designing human-machine interface of BBW system. In this paper, mathematical models of brake pedal feel for electro-hydraulic BBW (EH-BBW) system are developed, and the braking motion and the characteristics of the driver's leg action are modeled. Based on the dynamic characteristics of the brake pedal and the driver, two new HMI designs for EH-BBW system are proposed. In the designs, BBW system is modeled as a type of master-slave teleoperator. The effectiveness of the proposed designs is investigated using driving simulation.

• Journal of Magnetics
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• 제14권4호
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• pp.175-180
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• 2009

This paper describes the design and analysis of a tubular linear actuator for intelligent AAP (Active Accelerate Pedal) system. In a driving emergency, the electromagnetic actuator produces an additional pedal force such as the active pedal force and vibration force to release the driver's foot on accelerator pedal. A prior study found that the linear actuator with a ferromagnetic core had a problem in transferring the additional force naturally to a driver due to the cogging force. To reduce the cogging force and obtain higher performance of the AAP system, a coreless tubular linear actuator is suggested. Electromagnetic finite element analysis is executed to analyze and design the coreless tubular actuator, and dynamic analysis is performed to characterize the dynamic performance of the AAP system with the suggested tubular actuator for two types of thrust force.