• Industry Promotion Research
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• v.9 no.4
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• pp.93-103
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• 2024

With recent advancements in autonomous driving technology, vehicles are evolving beyond being simple means of transportation to become spaces for rest and work. As a result, the development of seat frames that maximize the use of interior space has been actively pursued. In particular, the electrification of containment sinking seats has emerged as a significant challenge, especially regarding the structural strength design of seat frame components as they transition from manual to automated systems. This study aims to convert the manual folding mechanism of the sinking seat frame into an automated mechanism using electric motors and to design the required component specifications and strength during the process. The main components for electrification were simplified, and, in particular, the design variables related to the placement angle and length of the electric motor applied to the cushion bracket were set at three levels, with subsequent 3D modeling conducted. The study results are as follows: Firstly, multi-body dynamic analysis showed that, compared to the standard configuration, an optimal motor arrangement angle can reduce motor force and torque by 30.25% and 6.7%, respectively. Secondly, strength analysis, considering the maximum allowable motor load and rear moment for each cushion bracket configuration, indicated that deformation and stress could be reduced by 13.76% and 34.95%, respectively, through the optimal angle and length. Finally, the optimal configuration of the cushion bracket, which aligns with the multi-body dynamic analysis results, was determined. This process is expected to provide a useful reference for future design strategies for automated seat frames.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.17 no.2
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• pp.130-136
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• 2018

This study develops a seat with electric motor technology for a one-ton grade commercial vehicle. While applying electric motor technology, the FMVSS 210 seat frame strength test is also conducted to examine the product's weak parts. The seat frame strength test used the FMVSS 210 test standard and the ANSYS program was used to simulate the test and identify weak parts in the deformation and strain values. The test results showed that the cushion frame and slide rail connection bracket were fractured at loads of about 10,000 N. Similarly, the maximum stress and strain values in the bracket were obtained in the simulation results. On this basis, it was evaluated that the connection part bracket was a considerably weak part in the case of the first model, and changing the shape of the bracket and reinforcing the strength were required. In addition, the seat belt anchorage test results and simulation results were compared to assure their validity. In the comparison results, the error for each is about 5-10%. Therefore, the simulation performed in this study is considered to have produced reasonably accurate results.