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Single Action Analysis for Lumbar Spinal Loads on Digital Korean Model
무랄리(Murali Subramaniyam),박상호(Sangho Park),서효나(Xu Xiaona),박경호(Piao Jinghu) 대한인간공학회 2010 대한인간공학회 학술대회논문집 Vol.2010 No.10
The objective of this study was to examine the lumbar spinal loads of Korean adults using Digital Korean Model (DKM). DKM is a computerized model to represent Korean Ethnics structures and functions in the virtual environment. The low back officially begins with the lumbar region of the human spinal structure. The lumbar vertebrae are most frequently involved in low back pain, which carries the most amount of body weight and are subject to the largest forces and stresses along the spine. DKM’s standard and variable postures were modeled in the virtual environment, standing and sitting posture cases were used in this study. The analyses of lumbar spinal loads were based on the single action and six different percentiles (5, 10, 25, 50, 75 and 95th ) were considered for the analyses. The study will be providing the guideline to know how much load Korean adults can carry without affecting their back, to know whether carrying load is within the limit and to know the effects on L4-L5 for a particular load, percentile and posture.
AN EFFICIENCY INDEX PROPOSAL FOR DIGITAL MICRO ASSEMBLY PROCESS
무랄리(Murali Subramaniyam),박상호(Sangho Park),최성일(Sung-il Choi),장석호(Seokho Jang),송준엽(Joon Yub Song),이창우(Chang Woo Lee) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
Microfactory, a miniature manufacturing system is considered as a means of achieving higher throughput with minimal amount of space and minimal utilization of both energy and resources by downsizing of production processes. Even though the micro factory was able to perform the whole manufacturing process like macro factory, the possibilityof the micro factory to improve its manufacturing efficiency for manufacturing of micro parts has not been considered enough. In this paper, an efficiency index is proposed to calculate the efficiency of the micro assembly process in digital environment. An assembly process is one of the manufacturing process in which interchangeable parts are added to a product in a sequential manner to create a finished product. The 3D CAD model of the micro lens module assembly is taken as an example, and the assembly processes required to assemble the lens module assembly has been discussed here. The product, processes and resources of the micro factory has been modeled using the 3D CAD system.