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권오영(Oyoung Kwon),박형석(Hyung Suk Park),오석근(Seok Geun Oh),홍대희(Daehie Hong) Korean Society for Precision Engineering 2019 한국정밀공학회지 Vol.36 No.12
This paper describes a control system for the servo prep column of High-Performance Liquid Chromatography (HPLC) based on fuzzy inference control. The key technology in pharmaceutical and biotechnology industries is refining performance and efforts to reduce costs by purifying target compounds with high purity at high yield while maintaining target compounds, is the major focus of new product development. Among the many refinement techniques, the most popular chromatographic methods require a column that can charge the resin with excellent performance and reproducibility. However, the present HPLC prep column has a hydraulic for control moving stopper and compressed chemical compound. It always causes irregular performances of the column. This paper presents automation control with a servo motor that prevents slurry issues and improves efficiency of the prep column reproducibility and provides easy automation. As an automation method, cortex-m4 as an embedded processor and operating system with LabVIEW, are used to control the HPLC system. To generate the heuristic data for the fuzzy inference control, experiments are conducted to identify correlation between data such as pressure sensor and motor speed. The result will improve performance of the servo prep column of HPLC for automation control based on fuzzy inference control.
Strategy for Motor Grader Blade Rotation considering Soil Distribution
이진규(Jinkyu Lee),배장호(Jangho Bae),권오영(Oyoung Kwon),김한얼(Hanul Kim),채솔(Chai Sol),홍대희(Daehie Hong) Korean Society for Precision Engineering 2022 한국정밀공학회지 Vol.39 No.2
Research on the automation of many types of construction equipment, including motor graders, is being actively conducted. In a motor grader cabin, the operator has difficulty observing the working environment because of a constructed field of view. Thus, workers rely on their experience and senses. Further, the working environment of the blade must be observed, and a control algorithm should be created to enable autonomous operation. In this study, a blade rotation control strategy considering the soil distribution was proposed. First, a co-simulation environment was constructed using RecurDyn for multibody dynamics analysis and EDEM for discrete element method simulation, and simulations were performed to determine the correlation between soil distribution and the blade rotation angle. Work quality and blade load were analyzed according to the simulation results. The optimal blade rotation angle according to soil distribution was obtained to develop the strategy for autonomous flattening and scattering work. The proposed control strategy was implemented in a 1/4 full-scale motor grader experimental setup. An experiment to evaluate work quality was conducted to validate the effectiveness of the proposed methods. The experimental results indicated that the proposed strategy effectively performed scattering work.
Strategy for Motor Grader Blade Rotation considering Soil Distribution
이진규(Jinkyu Lee),배장호(Jangho Bae),권오영(Oyoung Kwon),김한얼(Hanul Kim),채솔(Chai Sol),홍대희(Daehie Hong) Korean Society for Precision Engineering 2022 한국정밀공학회지 Vol.39 No.3
Research on the automation of many types of construction equipment, including motor graders, is being actively conducted. In a motor grader cabin, the operator has difficulty observing the working environment because of a constructed field of view. Thus, workers rely on their experience and senses. Further, the working environment of the blade must be observed, and a control algorithm should be created to enable autonomous operation. In this study, a blade rotation control strategy considering the soil distribution was proposed. First, a co-simulation environment was constructed using RecurDyn for multibody dynamics analysis and EDEM for discrete element method simulation, and simulations were performed to determine the correlation between soil distribution and the blade rotation angle. Work quality and blade load were analyzed according to the simulation results. The optimal blade rotation angle according to soil distribution was obtained to develop the strategy for autonomous flattening and scattering work. The proposed control strategy was implemented in a 1/4 full-scale motor grader experimental setup. An experiment to evaluate work quality was conducted to validate the effectiveness of the proposed methods. The experimental results indicated that the proposed strategy effectively performed scattering work.
김병우(Byeongwoo Kim),김창석(Changsuk Kim),권오영(Oyoung Kwon),곽호택(Hotaek Kwak),강성직(·Sunggik Gang) 한국자동차공학회 2014 한국자동차공학회 부문종합 학술대회 Vol.2014 No.5
This paper deals with the development method of finite element analysis for fatigue lifetime prediction of a braided wire under banding load condition. Recently, the proportion of importance about NVH is increasing in the automotive. To meet these needs, normal wire used for ground of engine and transmission was changed to braided wire that has excellent flexibility and durability. In case of used ground wire at engine or transmission is influenced banding load by repeated engine rolling. braided wire may be broken by these banding load. Therefore, To improve problem of design beforehand, developed fatigue simulation method for prediction of fatigue lifetime of braided wire under banding load condition.
단순 피로내구 모드를 이용한 차량용 전원분배박스의 수명 예측
김병우(Byeongwoo Kim),서장환(Junghwan Seo),권오영(Oyoung Kwon),김태진(Taejin Kim) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
This paper deals with the development method of Simplified Fatigue Mode for fatigue lifetime prediction of Automotive Fuse Box. Durability of Automotive is one of the major factor to determine quality of automotive. To meet these needs, we are doing many effort and study to improve durability performance for various component of automotive In case of installed Fuse Box at body of engine room is influenced of complex load continuously based on vibration and temperature change. Fixing part of Fuse Box may be broken by these complex load. Therefore, To improve problem of design beforehand, developed simulation method for prediction of fatigue lifetime of Fuse Box under complex condition. And, we did study about method of simplified fatigue mode to reduce simulation process of many step.