Е-Публикации
Технически университет - София

Abstract: Path following control is important in order to realize autonomous driving of robotic vehicles. The need to move automated cars in cluttered environments, as well as parking in tight places, often leads to following complex reference paths with small radius of curvature, which can be implemented successfully by vehicles with increased manoeuvrability, such as the four-wheel steering (4WS) cars. This paper proposes a feedback path control law for a bi-steerable car (4WS vehicle where the steering angle of the rear wheels is a function of the steering angle of the front one). First, kinematic model of the car in error coordinates expressed in a moving reference frame, which is partially linked to the vehicle is derived. The control law is constructed using Lyapunov-based control design techniques, yielding asymptotic stability of the closed-loop system in error coordinates. Simulation results illustrate the effectiveness of the proposed controller.

References

1. Li L., J. Li, S. Zhang (2021) Review article: State-of-the-art trajectory tracking of autonomous vehicles, Mech. Science, 12, 419–432.
2. Jacob S., L. Varghese, J. Selvaraj, S. Shanmugam (2024) Machine learning assisted autonomous vehicle in an IoT environment, C. R. Acad. Bulg. Sci., 77(3), 399–407.
3. Pleshkova S. (2023) Self-driving car control model extension with voice commands control, C. R. Acad. Bulg. Sci., 76(11), 1743–1753.
4. Manivel M., L. Kaliappan (2023) Design and implementation of modified multilevel inverter fed BLDC motor for electric vehicle application, C. R. Acad. Bulg. Sci., 76(10), 1562–1571.
5. Hung N., F. Rego, J. Quintas et al. (2022) A review of path following control strategies for autonomous robotic vehicles: Theory, simulations, and experiments, J. Field Robotics, 40(3) 747–779.
6. Hang P., X. Chen (2021) Towards autonomous driving: Review and perspectives on configuration and control of four-wheel independent drive/steering electric vehicles, Actuators, 10(184), 1–21.
7. Sekhavat S., J. Hermosillo (2002) Cycab bi-steerable cars: a new family of differentially flat systems, Adv. Robotics, 16(5), 445–462.
8. Hamerlain F., S. Tchenderli-Braham (2017) Reduction of chattering for a sliding mode control of a bi-steerable car, Proc. 11th Asian Control Conference, 606–611.
9. Zhang C., G. Gao, C. Zhao et al. (2022) Research on 4WS agricultural machine path tracking, Machines, 10(597), 1–21.
10. Petrov P., I. Kralov (2023) Modelling and feedback control for reversing a nonholonomic mobile robot platoon, C. R. Acad. Bulg. Sci., 76(9), 1402–1412.
11. Petrov P., I. Kralov (2021) Adaptive formation control of nonholonomic mobile robots for autonomous following in front of the leader, C. R. Acad. Bulg. Sci., 74(9), 1370–1379.
12. Slotine J.-J. E., W. Li (1991) Applied Nonlinear Control, Prentice Hall, New Jersey.

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