wonseok choi

Mr. wonseok choi


Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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14 June 2022 in Sensors
Verified
Journal Article
Open access
PDF file
SLSanghyeon Lee
Sanghyeon Lee
Heoncheol LeeHeoncheol Lee
Heoncheol Lee
YKYunyoung Kim
Yunyoung Kim
JKJaehyun Kim
Jaehyun Kim
WCwonseok choi
wonseok choi
This paper addresses the problem of real-time model predictive control (MPC) in the integrated guidance and control (IGC) of missile systems. When the primal-dual interior point method (PD-IPM), which is a convex optimization method, is used as an optimization solution for the MPC, the real-time performance of PD-IPM degenerates due to the elevated computation time in checking the Karush–Kuhn–Tucker (KKT) conditions in PD-IPM. This paper proposes a graphics processing unit (GPU)-based method to parallelize and accelerate PD-IPM for real-time MPC. The real-time performance of the proposed method was tested and analyzed on a widely-used embedded system. The comparison results with the conventional PD-IPM and other methods showed that the proposed method improved the real-time performance by reducing the computation time significantly.

13 October 2023 in Sensors
Verified
Journal Article
Open access
PDF file
JPJuhyeon Park
Juhyeon Park
Heoncheol LeeHeoncheol Lee
Heoncheol Lee
HKHyuck-Hoon Kwon
Hyuck-Hoon Kwon
YHYeji Hwang
Yeji Hwang
WCwonseok choi
wonseok choi
This paper addresses the problem of tracking a high-speed ballistic target in real time. Particle swarm optimization (PSO) can be a solution to overcome the motion of the ballistic target and the nonlinearity of the measurement model. However, in general, particle swarm optimization requires a great deal of computation time, so it is difficult to apply to realtime systems. In this paper, we propose a parallelized particle swarm optimization technique using field-programmable gate array (FPGA) to be accelerated for realtime ballistic target tracking. The realtime performance of the proposed method has been tested and analyzed on a well-known heterogeneous processing system with a field-programmable gate array. The proposed parallelized particle swarm optimization was successfully conducted on the heterogeneous processing system and produced similar tracking results. Also, compared to conventional particle swarm optimization, which is based on the only central processing unit, the computation time is significantly reduced by up to 3.89×.