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    • 1. 发明授权
    • Predictive repetition control method for a servo motor and an apparatus
therefor
    • 伺服电动机的预测重复控制方法及其装置
    • US5371451A
    • 1994-12-06
    • US965400
    • 1992-12-18
    • Yukio ToyosawaNaoto Sonoda
    • Yukio ToyosawaNaoto Sonoda
    • G05B13/02G05B13/04G05B19/19G05B19/23G05B21/02G05D3/12G05D3/14G05B19/00
    • G05B21/02G05B13/042G05B13/048G05B19/19G05B19/231G05D3/1445G05B2219/41145G05B2219/41431G05B2219/41435G05B2219/41453G05B2219/42152G05B2219/42256
    • A predictive repetition control method for a servo motor and an apparatus therefor, which can converge a positional deviation relative to a command, repeated at intervals of a predetermined period, to zero even if the command contains an asynchronous component which is not synchronous with the predetermined period. A repetitive controller 5 and an invert system feedforward controller 6 for a control object 4 are arranged in parallel in a servo control system of the servo motor. The feedforward controller 6, including a FIR digital filter, receives a future command P whose degree of advancement corresponds to an order N of the control target. Coefficients of the filter are automatically determined based on the command P to be inputted and a positional deviation .epsilon. so that the feedforward controller 6 itself functions as an invert system. A transfer function of the feedforward controller 6 functions as a reciprocal of a transfer function of the control object, and hence a transfer function of an output .omega. for the command P becomes "1", whereby the positional deviation is theoretically eliminated to become extremely small.
    • PCT No.PCT / JP92 / 00506 Sec。 371日期1992年12月18日 102(e)日期1992年12月18日PCT提交1992年4月20日PCT公布。 第WO92 / 20019号公报 日期:1992年11月12日。对于伺服电动机及其装置的预测重复控制方法,即使该指令包含异步部件,也能以相对于以预定周期的间隔重复的命令的位置偏差收敛 其与预定周期不同步。 控制对象4的重复控制器5和反相系统前馈控制器6并联在伺服电动机的伺服控制系统中。 包括FIR数字滤波器的前馈控制器6接收其进位程度对应于控制目标的次序N的未来命令P. 基于要输入的命令P和位置偏差εilon自动确定滤波器的系数,使得前馈控制器6本身用作反转系统。 前馈控制器6的传递函数用作控制对象的传递函数的倒数,因此用于命令P的输出ω的传递函数变为“1”,从而理论上消除位置偏差变得非常小 。
    • 4. 发明授权
    • Servo controller
    • 伺服控制器
    • US06252367B1
    • 2001-06-26
    • US09479998
    • 2000-01-10
    • Keiji SakamotoYukio ToyosawaKenji Takahashi
    • Keiji SakamotoYukio ToyosawaKenji Takahashi
    • G05B1101
    • G05B19/39G05B2219/42129
    • A servo controller capable of controlling motors to be driven in different control modes, such as a synchronous motor and an induction motor, irrespectively of the type of the motor, and also capable of carrying out servo control by using incremental feedback signals. A control section common to individual motors and a control section dedicated to each motor are provided in a servo controller. The common control section is always used, while the dedicated control section is selectively used in accordance with the motor to be driven. Thereby, motors each requiring a different control mode can be controlled by the servo controller of one type. The use of th servo controller of one type can reduce maintenance management and a load on a CNC. Also, the provision of the control section common to individual motors can restrain increases of size, installation area and manufacturing cost of the device.
    • 一种能够控制不同控制模式的电动机的伺服控制器,例如同步电动机和感应电动机,与电动机的类型无关,并且还能够通过使用增量反馈信号进行伺服控制。 在伺服控制器中设置有单个电动机共同控制部分和专用于每个电动机的控制部分。 始终使用公共控制部,同时根据要驱动的电动机有选择地使用专用控制部。 因此,可以通过一种类型的伺服控制器来控制需要不同控制模式的电动机。 使用一种伺服控制器可以减少CNC的维护管理和负载。 此外,单个电动机共同的控制部的设置可以抑制装置的尺寸,安装面积和制造成本的增加。
    • 6. 发明授权
    • Reference point return method
    • 参考点返回方法
    • US4782275A
    • 1988-11-01
    • US130993
    • 1987-10-14
    • Keiji SakamotoYukio Toyosawa
    • Keiji SakamotoYukio Toyosawa
    • G05B19/18G05B19/23G05B19/401
    • G05B19/231G05B19/4015G05B2219/50025
    • In reference point return control, a grid point position at which a one-revolution signal (RTS) is first generated by a rotary encoder (24) following restoration of a deceleration limit switch (29) is adopted as a reference point. When a zero point return mode (ZRN="1") for returning a movable element to the reference point is in effect, a numerical controller (21) regards the position at which the one-revolution signal (RTS) is generated by the rotary encoder (24) as being zero. A commanded position REF.sub.n, until the next one-revolution signal is generated, is monitored at every predetermined time, such monitoring of the commanded position being repeated until the movable element arrives in the vicinity of the reference point. When the movable element approaches the reference point and the deceleration limit switch (29) is restored, the commanded position REF.sub.n at an initial time every .sub..DELTA. T is obtained, a distance (N-REF.sub.n) from the commanded position to the position at which the next one-revolution signal is generated is adopted as the final commanded amount of travel, and this is outputted to a digital servo-circuit (22) to return the movable element to the reference point. N is the distance between grid points.
    • 8. 发明授权
    • Method of and apparatus for controlling a plurality of servomotors
    • 用于控制多个伺服电动机的方法和装置
    • US6046566A
    • 2000-04-04
    • US295105
    • 1999-04-21
    • Naoto SonodaYukio ToyosawaKazuomi Maeda
    • Naoto SonodaYukio ToyosawaKazuomi Maeda
    • G05B19/19G05B19/18G05D3/00G05D3/12H02P5/00G05B11/32
    • G05B19/182
    • A method of and an apparatus for controlling a plurality of servomotors, in which one driven body is driven by one main servomotor and at least one subordinate servomotor. Synchronous control is performed with good response and high accuracy and repetitive control is performed with simple arrangement preventing interference between axes, and further operation mode of the plurality of servomotors is easily switched between coupled driving and independent driving. A plurality of servomotors comprises one main servomotor and at least one other servomotor subordinate to the main servomotor, and position control is performed on the main servomotor side while velocity control and current control are performed individually for each servomotor. A velocity command for the main servomotor is subjected to a position adjustment based on a position deviation between the main servomotor and subordinate servomotor and the adjusted velocity command is used for the subordinate servomotor. Thus, the response is improved and synchronous control is performed with high accuracy.
    • 一种用于控制多个伺服电机的方法和装置,其中一个驱动体由一个主伺服电机和至少一个从属伺服电机驱动。 以良好的响应和高精度执行同步控制,并且以简单的布置执行重复控制,防止轴之间的干扰,并且多个伺服电机的进一步操作模式在耦合的驱动和独立驱动之间容易地切换。 多个伺服电动机包括一个主伺服电动机和从属于主伺服电动机的至少一个其它伺服电动机,并且在主伺服电动机侧执行位置控制,同时针对每个伺服电机单独执行速度控制和电流控制。 主伺服电机的速度指令根据主伺服电机和从属伺服电机之间的位置偏差进行位置调整,调整后的速度指令用于下级伺服电机。 因此,提高响应并且以高精度执行同步控制。