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    ํƒ€์ด์–ด ๋ชจ๋ธ์„ ์‚ฌ์šฉํ•œ ์ž์œจ ๋“œ๋ฆฌํ”„ํŠธ ์ฃผํ–‰ ์ œ์–ด ์„ค๊ณ„ ๋ฐ ๋ถ„์„

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    ํ•™์œ„๋…ผ๋ฌธ (์„์‚ฌ)-- ์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› : ๊ณต๊ณผ๋Œ€ํ•™ ๊ธฐ๊ณ„ํ•ญ๊ณต๊ณตํ•™๋ถ€, 2019. 2. ์ด๋™์ค€.๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” Wheeled Mobile Robot(WMR)์˜์ž์œจ๋“œ๋ฆฌํ”„ํŠธ ๋“œ๋ผ์ด๋น™ ์ปจํŠธ๋กค๋Ÿฌ๋ฅผ ๋””์ž์ธ ํ•˜๊ณ  ๋ถ„์„ํ•˜๋ฉฐ, ์ด๋ฅผ ์ƒ์šฉ ํ”„๋กœ๊ทธ๋žจ์ธ CarSim์„ ์‚ฌ์šฉํ•œ ์‹œ๋ฎฌ๋ ˆ์ด์…˜์„ ํ†ตํ•˜์—ฌ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ๊ฒ€์ฆ ํ•œ๋‹ค. ์ฒซ์งธ๋กœ, WMR์˜ ๋‹ค์ด๋‚˜๋ฏน์Šค์™€ ํƒ€์ด์–ด ๋ชจ๋ธ์„ ์ •์˜ ํ•˜๊ณ , ์ด๋Ÿฌํ•œ ๋ชจ๋ธ๋กœ ์ธํ•œ ์ œ์•ฝ ์‚ฌํ•ญ์— ๋Œ€ํ•˜์—ฌ ๋…ผ์˜ํ•œ๋‹ค. ๋‹ค์Œ์œผ๋กœ, ์‚ฌ๋žŒ์˜ ๊ด€์ ์—์„œ ๋“œ๋ฆฌํ”„ํŠธ ๋“œ๋ผ์ด๋น™์„ ๋ถ„์„ํ•˜๊ณ , ๋“œ๋ฆฌํ”„ํŠธ ๋“œ๋ผ์ด๋น™ ์ œ์–ด๊ธฐ์˜ ์ œ์–ด ๋ชฉ์ ์„ ์ •์˜ํ•œ๋‹ค. (์ฐจ๋Ÿ‰์˜ ๋ฐฉํ–ฅ๊ณผ ์š” ๊ฐ์†๋„๋ฅผ ์ œ์–ดํ•œ๋‹ค.) ๋“œ๋ฆฌํ”„ํŠธ ๋“œ๋ผ์ด๋น™ ์ œ์–ด๊ธฐ๋Š” ๊ณ -๋ ˆ๋ฒจ ์ œ์–ด, ๋ชฉํ‘œ ๊ฐ’์„ ์ฐพ๊ธฐ ์œ„ํ•œ ์ตœ์ ํ™” ๊ทธ๋ฆฌ๊ณ  ๊ณ -๊ฒŒ์ธ ์ œ์–ด๋กœ ๊ตฌ์„ฑ๋œ๋‹ค. ๋‹ค์Œ์œผ๋กœ, ์ œ์–ดํ•˜์ง€ ์•Š๋Š” ์†๋„์— ๋Œ€ํ•œ ๋ถ„์„์„ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ๋งˆ์ง€๋ง‰์œผ๋กœ ์ œ์•ˆํ•œ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ CarSim ์‹œ๋ฎฌ ๋ ˆ์ดํ„ฐ๋ฅผ ์ด์šฉํ•˜์—ฌ ๊ฒ€์ฆํ•˜์˜€๋‹ค. ์ •์ƒ ์ƒํƒœ์˜ ๋“œ๋ฆฌํ”„ํŠธ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ๊ฒฐ๊ณผ์™€, ํ—ค์–ดํ•€ ๊ฒฝ๋กœ์— ๋Œ€ํ•œ ๋“œ๋ฆฌํ”„ํŠธ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ๊ฒฐ๊ณผ๋ฅผ ์ œ์‹œ ํ•œ๋‹ค.Control design and analysis of Wheeled Mobile Robot(WMR) autonomous drift-driving and the simulation experiment using the CarSim simulator are presented and the analysis of the controller proceeds. We first introduce WMR dynamics, tire model and problem formulation of the WMR. We then design drift-driving control using human strategy (control side slip angle and yaw rate). The drift-driving control consists of high-level control, optimization to find desired control input and high-gain control. We analyze the uncontrolled velocity dynamics and stability of the controller. The CarSim simulation results of drift-driving on steady-state equilibriums and the hairpin path with the desired yaw rate are provided.List of Figures - v List of Tables - vi Abbreviations - vii 1 Introduction - 1 1.1 Motivation and related works . . . . . . . . . . . . . . . . . . . . 1 1.2 Contribution of this work . . . . . . . . . . . . . . . . . . . . . . 3 2 System Modeling - 5 2.1 Model dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Tire model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 Problemformulation . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 Drift-Driving Control Design - 10 3.1 High-level control . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.2 Optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.3 High-gain control . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4 Analysis of Control - 17 4.1 Internal dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.2 Stability analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5 Simulation Results - 25 5.1 Simulation setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.2 Steady-state drift-driving . . . . . . . . . . . . . . . . . . . . . . 27 5.3 Hairpin turn drift-driving . . . . . . . . . . . . . . . . . . . . . . 33 6 Conclusion and Future Work - 40 6.1 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 6.2 Future work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Maste
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