MECHANICAL ARM SYSTEM AND MECHANICAL ARM CONTROL METHOD

    公开(公告)号:US20210162594A1

    公开(公告)日:2021-06-03

    申请号:US16927247

    申请日:2020-07-13

    Abstract: A mechanical arm system includes at least two links, at least two control devices and at least two motor devices. Each of the control devices includes a first control unit, a mechanical arm control unit and a driving unit. The first control unit receives an end-position command to output a first torque signal. The mechanical arm control unit includes a rigid mechanical unit and a mechanical model unit. The rigid mechanical unit receives the first torque signal to obtain a rigid mechanical torque, and the mechanical model unit receives the rigid mechanical torque and operates the flexible mechanical model to establish the mechanical arm model for obtaining the target torque, and the target position signal is output according to the target torque. The driving unit generates a driving signal according to the target position signal to adjust a rotation angle of the corresponding motor device.

    METHOD FOR PREDICTING AND COMPENSATING FRICTIONS OF FEED SYSTEM, AND COMPUTER READABLE STORAGE

    公开(公告)号:US20210373533A1

    公开(公告)日:2021-12-02

    申请号:US17031235

    申请日:2020-09-24

    Abstract: A method for predicting and compensating frictions of a feed system includes following steps: constantly obtaining current signals and angle-position signals of a motor by a motor driver of a feed system after being activated; calculating frictions of the motor upon each rotating position according to the obtained current signals and angle-position signals and generating multiple records of friction data; creating a friction model according to the multiple records of friction data and the angle-position signals each respectively corresponding to each record of friction data with respect to each rotating position; importing current angle-position signal of the motor to the friction model for predicting a predicted friction; calculating a compensation current based on the predicted friction; and, controlling the motor driver to additionally provide the compensation current to the motor for conquering an upcoming friction of the feed system approximate to the predicted friction.

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