Abstract
Keywords :
SBW(Steer-By-Wire), ECU(Electronic Control unit), PMSM(Permanent Magnet Synchronous Motor),DSP(Digital Signal Processor), HILS(Hardware-In-the-Loop Simulation)
Abstract
Conventional steering systems have physical mechanical connections. Unfortunately, these systems in automotive are not only inefficient systems against engine horsepower but hazard sources for driver on the front-end collision. To resolve these problems, this paper presents Steer-by-Wire(SBW)system which is controlled by only electronic signals without mechanical connections. Mechanical operations of the current hydraulics power steering are replaced to actuate two motors in this SBW system. Therefore, vacuum booster, fluid and hoses are eliminated. SBW systems bring hope in creating steering systems for most vehicles, which will still be equipped with power steering. In this SBW system, PMSM as a Rack Motor and DC motor as a reaction motor are controlled by ECU with information from all sensors. This paper presents ECU which has DSP TMS320LF2406APZS , two kinds of motor drives and sensor interfaces, besides their functions were verified through HILS and real vehicle experiment.