To provide an electrically-driven type linear actuator which can drive an electric motor with high accuracy by taking discontinuous rigidity occurring on the basis of a change gear ratio in a transmission mechanism into consideration.SOLUTION: An electrically-driven type linear actuator comprises: an electric motor; a linear motion mechanism; a control device which controls a load which is applied to an object in such a manner that the electric motor is driven and the linear motion mechanism linearly moves; and a transmission mechanism having transmission function such that a correspondence relationship between an amount of linear motion and an amount of rotation of the electric motor changes with a prescribed load as a boundary. The control device has: an estimator for estimating the load applied by the linear motion mechanism; a load controller which calculates a motor driving amount by using control gain multiplied by deviation between an estimated value and a target value of the load for control calculation, and by using control gain that discontinuously changes for transition of at least one of the estimated value and the target value of the load at one or more locations in the state where the estimated value and so on of the load are not zero; and a control gain adjustment part which adjusts the control gain.SELECTED DRAWING: Figure 1A

    【課題】変速機構での変速比に基づき発生する不連続な剛性を考慮することで、精度の高い電動モータの駆動が可能な電動式直動アクチュエータを提供する。【解決手段】電動モータと、直動機構と、電動モータを駆動して直動機構が直線運動により対象物に印加する荷重を制御する制御装置と、所定の荷重を境に直線運動の直動量と電動モータの回転量との対応関係が変化する変速機能を有する変速機構と、を備え、制御装置は、直動機構が印加する荷重を推定する推定器と、前記荷重の推定値と目標値との偏差等に乗算される制御ゲインを制御演算に使用し、前記荷重の推定値等がゼロではない状態において、少なくとも1か所以上で前記荷重の推定値と前記目標値とのうちの少なくとも一方の推移に対して不連続的に変化する制御ゲインを使用して、モータ駆動量を算出する荷重制御器と、制御ゲインを調整する制御ゲイン調整部と、を有する。【選択図】図1A


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    Titel :

    ELECTRICALLY-DRIVEN TYPE LINEAR ACTUATOR


    Weitere Titelangaben:

    電動式直動アクチュエータ


    Beteiligte:
    MASUDA YUI (Autor:in)

    Erscheinungsdatum :

    2023-01-10


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern



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