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    • 1. 发明授权
    • Positioning control system for a fluid powered cylinder
    • 液压缸定位控制系统
    • US4804913A
    • 1989-02-14
    • US117915
    • 1987-10-29
    • Wataru ShimizuYasuhiro YuasaYuuji Matsuki
    • Wataru ShimizuYasuhiro YuasaYuuji Matsuki
    • F15B9/09F15B15/28G05B19/416G05D3/20G01B7/14G01N27/72G01R33/00G08C19/16
    • F15B15/2861F15B15/28F15B15/2846G05B19/416G05D3/20G05B2219/43115
    • A coil assembly including primary coils disposed at predetermined locations axially spaced from one another and secondary coils provided in association with these primary coils is fixed at one end of a fluid powered cyliner. A piston rod is slidably disposed through a space in the primary and secondary coils. Rings made of magnetic substance are provided on the piston rod with a predetermined axial interval therebetween. Each of the primary coils is excited with one of reference AC signals which are out of phase with one another and an output signal which is electrically phase-shifted in accordance with the position of the piston rod is obtained as a sum of output signals from the secondary coils. Piston rod position data is obtained by measuring the amount of the phase-shifting and is utilized for positioning control of the cylinder. The velocity and acceleration of the movement of the piston rod are detected on the basis of the detected position data and the amount of overrun is estimated in accordance with the detected velocity and acceleration to effect the most accurate positioning control. Each time the positioning is completed, the amount of overrun is corrected to improve the accuracy of a next positioning control.
    • 线圈组件包括设置在彼此轴向间隔开的预定位置处的初级线圈和与这些初级线圈相关联地设置的次级线圈,其固定在流体动力切割机的一端。 活塞杆可滑动地设置在主和次级线圈中的空间中。 在活塞杆上以预定的轴向间隔设置由磁性物质制成的环。 每个初级线圈被彼此不同相的参考AC信号中的一个激励,并且根据活塞杆的位置被电相移的输出信号作为来自 次级线圈 通过测量相移量获得活塞杆位置数据,并用于气缸的定​​位控制。 根据检测到的位置数据检测活塞杆运动的速度和加速度,并根据检测到的速度和加速度估计超限量,以实现最准确的定位控制。 每次定位完成时,校正超限量以提高下一个定位控制的精度。
    • 2. 发明授权
    • Positioning control device for an electric motor
    • 电动机定位控制装置
    • US4651073A
    • 1987-03-17
    • US774396
    • 1985-09-10
    • Wataru ShimizuYasuhiro Yuasa
    • Wataru ShimizuYasuhiro Yuasa
    • H02P3/04G05B19/35G05B19/416G05D3/00G05D23/275
    • G05B19/358G05B19/416G05B2219/34387G05B2219/37313G05B2219/37486G05B2219/41105G05B2219/41279G05B2219/41288G05B2219/43019G05B2219/43115G05B2219/50187
    • A rotational position, velocity and acceleration of an electrical motor are detected and an amount of overrun produced when the motor has stopped is estimated from the detected velocity and acceleration, and at least one of motor position detection data and a positioning target value is changed in accordance with the estimated amount of overrun. The position detection data and the positioning target value after the change are compared with each other and a command for stopping the motor is generated in accordance with a result of this comparison. A brake is applied to the motor in advance by the amount of the estimated overrun so that the motor is stopped at a desired target position after making overrun. Further, velocity setting signals are generated in accordance with desired acceleration and deceleration characteristics and the velocity control of the motor is effected in an open loop in response to the velocity setting signals. By the stop and velocity controls of an open loop system, positioning control of the motor of the open loop system can be accurately performed.
    • 检测电动机的旋转位置,速度和加速度,并且根据检测到的速度和加速度来估计电动机停止时产生的超限量,并且电动机位置检测数据和定位目标值中的至少一个被改变 按照估计的超限量。 将位置检测数据和变更后的定位目标值进行比较,根据该比较的结果生成停止电动机的指令。 预先向电动机施加制动以推定超限量,使得在超速运行之后电动机停止在期望的目标位置。 此外,根据期望的加速和减速特性产生速度设定信号,并且马达的速度控制响应于速度设定信号在开环中进行。 通过开环系统的停止和速度控制,可以准确地执行开环系统的电动机的定位控制。