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Study of the Transmission Error Prediction of a Five-speed Manual Transmission System
Sang-Pil Cho(조상필),Dong-Gyu Lee(이동규),Lae-Sung Kim(김래성),Zhe-zhu Xu(허철수),Sung-ki Lyu(류성기) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.2
For the manual transmission gearbox used in the automotive industry, gear meshing transmission error is the main source of noise known as gear whine, and radiated gear whine noise plays an important role in the whole gearbox. Therefore, in order to keep competitive in the automotive market, the NVH performance of transmission gearboxes is increasingly important for automotive manufacturers when a new product is developed. In this paper, in order to achieve an optimized tooth contact pattern, gear tooth modification is applied to make up for the deformation of the teeth owing to load. A five-speed MT gearbox is firstly modeled in RomaxDesign software and the prediction of transmission error under the loaded torques is studied and compared. From the simulation, the transmission error and maximum contact stress are also simulated and compared after tooth modification of the loaded torques. Finally, the simulation results are used to optimize the whole gearbox design and the final gearbox prototype is testified to obtain NVH performance in a semi-anechoic room.
조상필 ( Sang Pil Cho ) 한국지방자치학회 1996 한국지방자치학회보 Vol.8 No.1
This Paper aims to provide development strategies for the South Coast Region of the Chonnam based upon the assessment of problems and potentials which have been confronted and possessed by the region concerned. In the course of Conducting the study, development Projects were Selected by the Chonnam on the basis of development Objectives and Strategies set aside by the Government for the development of Soutth Coast Region. South-Coast Region is an integral Part of the South-Western Area and a large portion of development budget will be invested in those Projects within this region. Comparative evaluate of the development strategies designed by the government has been made to provide better ones. Therefore, this study examined the formative process South-Coast Region and analyzed its development strategies and main projects.
프로피버스 통신을 이용한 실시간 절삭 상태 모니터링에 관한 연구
윤상환(Sang-Hwan Yoon),조상필(Sang-pil Cho),류성기(Sung-gi Lyu) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.3
The cutting processes used for monitoring engineering includes analysis and feedback about strange conditions, tools collision and tools wear in real time, for improving the working ratio of equipment and productivity. In this study, we proposed monitoring using profibus to increase the reliability as the most important factor for cutting monitoring. The profibus can increase the reliability of cutting monitoring for cutting torque of a main spindle motor and a feed motors through PLC-based interface.