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    • 1. 发明授权
    • Operator control systems and methods for swing-free gantry-style cranes
    • 无摇摆龙门起重机的操作员控制系统和方法
    • US5785191A
    • 1998-07-28
    • US651166
    • 1996-05-15
    • John T. FeddemaBen J. PettersonRush D. Robinett, III
    • John T. FeddemaBen J. PettersonRush D. Robinett, III
    • B66C13/06
    • B66C13/063
    • A system and method for eliminating swing motions in gantry-style cranes while subject to operator control is presented. The present invention comprises an infinite impulse response ("IIR") filter and a proportional-integral ("PI") feedback controller (50). The IIR filter receives input signals (46) (commanded velocity or acceleration) from an operator input device (45) and transforms them into output signals (47) in such a fashion that the resulting motion is swing free (i.e., end-point swinging prevented). The parameters of the IIR filter are updated in real time using measurements from a hoist cable length encoder (25). The PI feedback controller compensates for modeling errors and external disturbances, such as wind or perturbations caused by collision with objects. The PI feedback controller operates on cable swing angle measurements provided by a cable angle sensor (27). The present invention adjusts acceleration and deceleration to eliminate oscillations. An especially important feature of the present invention is that it compensates for variable-length cable motions from multiple cables attached to a suspended payload.
    • 提出了一种用于消除龙门式起重机中摆动运动的系统和方法,同时进行操作员控制。 本发明包括无限脉冲响应(“IIR”)滤波器和比例积分(“PI”)反馈控制器(50)。 IIR滤波器从操作者输入装置(45)接收输入信号(46)(命令速度或加速度),并将其转换为输出信号(47),使得所得运动无摇摆(即,终点摆动 防止)。 IIR滤波器的参数使用提升电缆长度编码器(25)的测量值进行实时更新。 PI反馈控制器补偿建模误差和外部干扰,例如与物体碰撞引起的风或扰动。 PI反馈控制器通过电缆角度传感器(27)提供的电缆回转角度测量器进行操作。 本发明调整加速和减速以消除振荡。 本发明的一个特别重要的特征在于它补偿来自附接到悬挂有效载荷的多个电缆的可变长度的电缆运动。