In recent years, vehicles equipped with EPS (Electric Power Steering) have come into widespread use. This is because EPS is better than HPS (hydraulic power-steering) in improving fuel consumption and reducing emissions. However, most present power-steering systems, including HPS, have mere function of assist based on driver's torque. There exist only few vehicles equipped with EPS that has a function of improving vehicle stability. Because, it requires vehicle state signals such as yaw rate etc. Taking this situation into consideration, we developed the TCAS with the keywords of 'environment' and 'stability' that acts without vehicle state signal sensors, that is, the same system as the present EPS. In an EPS system, a motor is applied via a reduction gear to steering mechanism. This system has both frictional loss torques and spring characteristics or backlash in the steering mechanism. When a driver steers, Alignment torque is generated via the tires and the road surface. This paper proposes an advanced control strategy to improve steering maneuverability in the emergency steering or on slippery roads, with TCAS (The Torque Controlled Active Steer), which means EPS with advanced control method. TCAS, which is based on the alignment torque estimation and the feedback compensation aims to improve returnability by using the alignment torque estimation on the various situations. By vehicle experiment, we confirmed that our controller with the alignment torque compensation improved vehicle dynamics stability, because of the improved returnability.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Development of Torque Controlled Active Steering Using the Estimated Alignment Torque for EPS


    Additional title:

    Entwicklung einer vom Drehmoment gesteuerten Aktivlenkung mit dem geschätzten Ausrichtmoment der elektrischen Servolenkung EPS


    Contributors:

    Published in:

    Publication date :

    2005


    Size :

    6 Seiten, 13 Bilder, 1 Tabelle, 6 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    ELECTROMECHANICAL POWER STEERING SYSTEM CONTROL USING ONLY MEASURED OR ESTIMATED STEERING TORQUE SIGNAL

    VARGA ÁDÁM / KALAPOS GÁBOR / HELLI MÁRTON et al. | European Patent Office | 2019

    Free access

    Electromechanical power steering system control using only measured or estimated steering torque signal

    VARGA ÁDÁM / KALAPOS GÁBOR / HELLI MÁRTON et al. | European Patent Office | 2022

    Free access

    ELECTROMECHANICAL POWER STEERING SYSTEM CONTROL USING ONLY MEASURED OR ESTIMATED STEERING TORQUE SIGNAL

    VARGA ÁDÁM / KALAPOS GÁBOR / HELLI MÁRTON et al. | European Patent Office | 2021

    Free access

    ELECTROMECHANICAL POWER STEERING SYSTEM CONTROL USING ONLY MEASURED OR ESTIMATED STEERING TORQUE SIGNAL

    VARGA ÁDÁM / KALAPOS GÁBOR / HELLI MÁRTON et al. | European Patent Office | 2022

    Free access