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전형호(Hyung-Ho Chun),탁태오(Tae-Oh Tak) 한국철도학회 2002 철도저널 Vol.5 No.1
In this study, an analytical method for ride sensitivity analysis of a train with non-linear suspension elements are proposed. Non-linear characteristics of springs and dampers for primary and secondary suspensions of a train are parameterized using polynomial interpolation. Vertical dynamic model of a three-body train running on straight rail with the predetermined roughness expressed in terms of spectral density function is set up and its equations of motion for ride analysis are derived. Using the direct differentiation method, sensitivity equations of the vertical dynamic model with respect to design parameters associated with non-linearity of suspensions are obtained. Based on the sensitivity analysis, improvement of ride is achieved by varying appropriate suspension parameters.
이홍기(Lee Hong Ki),전형호(Chun hyung ho),탁태오(Tak Tae Oh) 강원대학교 산업기술연구소 2001 産業技術硏究 Vol.21 No.1
In this study, a driver model based on the lead-lag controller for stable maneuver of a highly nonlinear, multi-dimensional, numerically stiff multibody vehicle model according to the various handling test requirements such as steady-state cornering, double lange change, etc. is presented The lead-lag controller is developed with lead and lag compensation. Which use the transfer function with cross-over frequency by frequency response method. The proposed driver model is applied to a vehicle model in steady-state and slalom maneuver to verify its effectiveness and validity. The results show that the proposed path control strategy is excellent both in pursuing the desired course and stability of the vehicle.
액정디스플레이(LCD) 판넬유리 운반로봇의 진동저감에 대한 연구
탁태오(Tak Tae Oh),김헌영(Kim Heon Young),전형호(Chun Hyung Ho),오용빈(Oh Yong Been) 강원대학교 산업기술연구소 2004 産業技術硏究 Vol.24 No.1
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.
김대희(Dae-Hee Kim),탁태오(Tea-Oh Tak),국민구(Min-Gu Kuk),전형호(Hyung-Ho Chun),김종갑(Chong-Kap Kim),조성식(Sung-Shik Cho),조남영(Cho Nam-Young) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.11
In order to predict required handle torque of a steering system at design state, mass of vehicle, suspension geometry, hydro-mechanical characteristics of a power assisted system should be considered. In this research, a multibody approach to calculate handle torque and rackbar force as a function of tire contact patch friction torque is proposed. For validation, the computed rackbar force and handle torque are compared to the measured values obtained through actual vehicle test, and they showed good correlation. This computational procedure will be implemented in a steering system analysis and design software to predict handle torque and determine required suspension geometry and power assist system characteristics.
이동섭(Dong Sup Lee),탁태오(Tae Oh Tak),김성주(Sung Ju Kim),전형호(Hyung Ho Chun) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
The steering motion to control direction of a vehicle is man-machine system which is run by interaction of driver and steering system. Object of this research is design of most optimized steering system through analysis of dynamic property of driver’s arm and compose human-model executing mechanical analysis. For accomplish this research measures displacement of each joint using motion capture equipment during steering motion and executes research using LifeMOD which is human-mechanic analysis program based on measured data. Dynamic analysis provide real property about steering motion and using force-displacement relation we can expected driver’s arm angle change of real joint and acting force.
ADAMS/Insight를 이용한 1톤 상용트럭의 동역학 해석 및 최적화
전형호,탁태오 강원대학교 산업기술연구소 2003 産業技術硏究 Vol.23 No.A
Stochastic simulation technique has advantages over deterministic simulation in various engineering analysis, since stochastic simulation can take into consideration of scattering of various design variables. which is inherent characteristics of physical world. In this work. Monte-Carlo simulation mothod in ADAMS/Insight for steady-state cornering and J-turn behavior of a truck with design variables like hard points and busing stiffnesses hare performed to achieve better dynamic performance. The main purpose is to improve understeer gradient at steady-state cornering and minimize peak lateral acceleration and peak yaw rate at J-turn Through correlation analysis. design variables that have high impacts on the cornering behavior were selected. and significant performance improvement has been achieved bj- appropriately changing the high impact design variables.
이홍기,전형호,탁태오 江原大學校 産業技術硏究所 2001 産業技術硏究 Vol.21 No.B
In this study, a driver model based on the lead-lag controller for stable maneuver of a highly nonlinear, multi-dimensional, numerically stiff multibody vehicle model according to the various handling test requirements such as steady-state cornering, double lange change, etc. is presented The lead-lag controller is developed with lead and lag compensation. Which use the transfer function with cross-over frequency by frequency response method. The proposed driver model is applied to a vehicle model in steady-state and slalom maneuver to verify its effectiveness and validity. The results show that the proposed path control strategy is excellent both in pursuing the desired course and stability of the vehicle.
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.