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탁태오,정성훈,Tak, Tae-Oh,Chung, Sung-Hoon 강원대학교 산업기술연구소 1999 産業技術硏究 Vol.19 No.-
Vehicle suspensions can be regarded as interconnection of rigid bodies with kinematic joints and compliance elements such as springs, bushings, and stabilizers. Design of a suspension system requires detailed specification of the interconnection point (or so called hard points) and characteristic values of compliance elements. During the design process, these design variables are determined to meet some prescribed performance targets expressed in terms of SDFs (Static Design Factors), such as toe, camber, compliance steer, etc. This paper elaborates on a systematic approach to achieve optimum design of suspension systems.
액정디스플레이(LCD) 판넬유리 운반로봇의 진동저감에 대한 연구
탁태오,김헌영,전형호,오용빈 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.B
The development of efficient and precise handling of an liquid crystal display (LCD) panel has been addressed as the sizes of LCD panels become much larger than ever. The majority part of LCD panel handling is conducted by industrial robots for the cost reduction and the quality control. A challenging problem, vibration of the panel, can be found when the robots are utilized for handling LCD panels. The vibration causes the poor product precision and the low productivity. The characteristics of LCD panels, which are the high size-to thickness ratio, the high elasticity, and the high brittleness, are the major sources of the vibration This paper introduces the vibration attenuation techniques to overcome the difficulties encountered in the LCD production using the industrial robots.
프리텐셔너가 장착된 시트벨트 시스템의 관성잠김 안전버클 개발
탁태오,국민구,김대희,박재순,신승언,최석 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A
To improve passenger safety, seat belt systems with pre-tensioner that tightens seat belt webbing using explosive just before collision are widely used these days. Even though seatbelt must not unlatched without passengers' operation. explosive power of pre-tensioner can cause unlocking of a buckle. To prevent the unlocking, an anti-g mass that blocks displacement of the release button has been attached to the buckle. In this study, the dynamics and statics of locking mechanism associated with operation of anti-g buckle has been theoretically investigated, and important design variables that affect the operation of anti-g buckle have been identified. Through the total seat belt system's dynamic simulation using force and displacement inputs obtained from seat belt sled test, design of the proposed anti-g buckle has been validated.
[차량운동성능] 상용차용 공기스프링 현가장치에 관한 연구
탁태오,김금철 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
This paper presents a method for evaluating the performance of a leaf spring suspension and an air spring suspension systems for trucks in terms of ride and handling. Leaf springs which generally have non-linear progressive force-deflection characteristics, are modeled using beam and contact elements. The leaf spring model shows good correlation with experimental data. Each component of an air spring suspension system. which is a single leaf, air spring, height control valve compressor and linkages is modeled appropriately. Non-linear characteristics of air spring are accounted for using the measured data, and pressure and volume relations for height control system is also considered. The wheel rate of the air suspension is taken lower but roll stiffness is taken higher than those of leaf springs to improve ride and handling performance, which is verified through driving simulations
탁태오,김상섭,이운성 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.11_1
A numerical approach for performing kinematic design sensitivity analysis of vehicle suspension systems is presented. Compared to conventional analytic methods which requires explicit derivation of sensitivity equations, the proposed numerical method can be applied with any kinematic analysis method.<br/> An algorithm based on Lagrange polynomial is developed to ensure efficiency and accuracy associated with numerical differentiation. Through a kinematic design problem that determine the optimal suspension configuration that satisfies multi design criteria, the validity and usefulness of the approach is demonstrated.<br/>
탁태오,이벽림 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B
The human arm is modeled by three rigid bodies(the upper arm, the forearm and the hand)with seven degree of freedom(three in the shoulder, two in the elbow and two in the wrist). The objective of this work is to present a method to determine the three-dimensional kinematics of the human elbow joint using a magnetic tracking device. Euler angle were used to determine the elbow flexion-extension, and the pronation-supination. The elbow motion for the various driving conditions is measured through the driving test using a simulator. Discomfort levels of elbow joint motions were obtained as discomfort functions, which were based on subjects' perceived discomfort level estimated by magnitude estimation. The results showed that the discomfort posture of elbow joint motions occurred in the driving motion.
Monte-Carlo 시뮬레이션을 이용한 확률적 차량동역학 해석
탁태오,주재훈 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.B
Monte-Carlo simulation technique has advantages over deterministic simulation in various engineering analysis since Monte-Carlo simulation can take into consideration of scattering of various design variables, which is inherent characteristics of physical world. In this work, Monte-Carlo simulation of steady-state cornering behavior of a truck with design variables like hard points and busing stiffness. The purpose of the simulation is to improve understeer gradient of the truck, which exhibits a small amount of instability when the lateral acceleration is about 0.4g. Through correlation analysis, design variables that have high impacts on the cornering behavior were selected, and significant performance improvement has been achieved by appropriately changing the high impact design variables.