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Book ChapterDOI

Automatic Steering Using Ultracapacitor

01 Jan 2016-pp 409-414
TL;DR: To develop a retro fit auto parking assist which can be a module and fitted in any vehicle manufacturer, the steering wheel rotates automatically based on the parking trajectory required and can be viewed in GUI developed in PC/tablet.
Abstract: In today’s scenario, parking a vehicle is big challenge due to space availability, lack of driver attention, etc. In developed countries such as North America and Europe, several car manufacturers such as Ford, Audi, BMW, and GM are in market introduction of auto parking cars. In emerging market such as Indian subcontinent, still this feature is not introduced due to traffic congestion and affordability by buyers. This proposal is to develop a retro fit auto parking assist which can be a module and fitted in any vehicle manufacturer. Once the driver enables auto parking mode, the steering wheel rotates automatically based on the parking trajectory required. The speed, angle and direction of rotation of steering column will be sensed by Hall effect-based multi turn steering position sensor which will be powered by ultracapacitor to provide power back up for recording the turn when main power goes off. Based on the sensor information, the controller based on Labview/PLC will take effective action on the motor drive which in turn controls the speed, angle, and direction of motor. The real-time location of the car can be viewed in GUI developed in PC/tablet. Indian road conditions such as pedestrian crossing and neighboring vehicles can be simulated and based on that the parking trajectory will vary. The parking trajectory can be parallel parking, perpendicular parking, reverse parking, etc. The acceleration and speed location of the vehicle can also be simulated and shown in tablet/PC GUI. Later this project can be extended with wheels, transmission, and chassis to show entire car in auto parking mode. In this paper, a Simulink model of the concept is also described. This concept is filed for a patent in India patent office.
References
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Journal ArticleDOI
TL;DR: Both the simulation and experiment results show that the proposed fuzzy controller can reduce the torque ripples and allow the driver to have a good steering feeling and stable driving.
Abstract: Pressure ripples in electric power steering (EPS) systems can be caused by the phase lag between the driver’s steering torque and steer angle, the nonlinear frictions, and the disturbances from road and sensor noise especially during high-frequency maneuvers. This paper investigates the use of the robust fuzzy control method for actively reducing pressure ripples for EPS systems. Remarkable progress on steering maneuverability is achieved. The EPS dynamics is described with an eight-order nonlinear state-space model and approximated by a Takagi-Sugeno (T-S) fuzzy model with time-varying delays and external disturbances. A stabilization approach is then presented for nonlinear time-delay systems through fuzzy state feedback controller in parallel distributed compensation (PDC) structure. The closed-loop stability conditions of EPS system with the fuzzy controller are parameterized in terms of the linear matrix inequality (LMI) problem. Simulations and experiments using the proposed robust fuzzy controller and traditional PID controller have been carried out for EPS systems. Both the simulation and experiment results show that the proposed fuzzy controller can reduce the torque ripples and allow us to have a good steering feeling and stable driving.

54 citations

Journal ArticleDOI
TL;DR: In this article, a hardware-in-the-loop simulation (HILS) system was developed before the development of an electric power steering (EPS) system in a vehicle.
Abstract: In this paper, a hardware-in-the-loop simulation (HILS) system was developed before the development of an electric power steering (EPS) system in a vehicle. This study was focused on the establishment of the HILS system. Driving conditions are simulated with the HILS system. The actual steering input parameters are confirmed on the monitor while driving the HILS system. The steering forces observed in the simulation with the developed HILS system are similar to those in real vehicle tests. The developed HILS system can be applied in the development of various types of EPS systems.

31 citations

01 Jan 2011
TL;DR: In this article, the technology and difficulties of ultracapacitor-battery interface for energy management system is analyzed and the related esearch work is made, and the authors make a comparison between the two types of devices.
Abstract: Electrical energy storage is a central element to any electric-drive train technology, whether hybrid-electric, fuel-cell, or all-electric. A particularly cost-sensitive issue with energy storage is the high replacement cost of depleted battery banks. One possibility to ease the power burden on batteries and fuel cells is to use ultra-capacitors as load-leveling devices. In this overview the technology and difficulties of ultracapacitor-Battery interface for energy management system is analyzed and the related esearch work is made. r

30 citations