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Semi-autonomous parking assist system (SA-PAS)
ISSN: 0148-7191, e-ISSN: 2688-3627
To be published on November 21, 2019 by SAE International in United States
Event: NuGen Summit
This paper describes the Semi-autonomous parking assist system (SA-PAS) developed using combination of high accuracy position sensing and electronic power steering. A real-time system that helps driver to identify the parking space and assist to perform maneuvers. Parking is often a difficult task, especially for inexperienced drivers. Starting with the problem of having to find a suitable parking spot, to then maneuvering in to it without colliding with anything or anyone, while trying avoiding disturbing the surrounding traffic. The numbers of vehicles are rapidly increasing as compared to the expansions of roads and parking spaces. Therefore, effective use of the existing spaces is needed (by making them narrower), which can cause inconvenience to many drivers. Semi-autonomous parking assist system searches for suitable space and steers the vehicle into it, while driver has to control the gear shifter, accelerator and brakes. If the driver presses the button to activate the park assist, a special sensor integrated into the side of the front bumper scans the side of the road as the vehicle drives past. The park assist lets the driver know immediately when it finds a suitable parallel or perpendicular space. The system calculates the optimum path into the space, the necessary steering movements, and the number of maneuvers needed. Then, if the driver engages the reverse gear, the park assist takes control: the driver let’s go of the steering wheel and controls the parking maneuver by carefully accelerating and braking. The currently available systems have cameras to assist or reverse/front parking sensor just to give an indication that obstacle is present in the way but steering maneuvers has to be decided and executed by driver only. In future this same system can be upgrade to completely autonomous systems by adding breaking and engine management ECU controls to it.