公开(公告)号：US5719566A

公开(公告)日：1998-02-17

申请号：US673389

申请日：1996-06-28

申请人： John Readman ,  James J. Wrobel ,  Timothy M. Mayer

发明人： John Readman ,  James J. Wrobel ,  Timothy M. Mayer

IPC分类号： B64C13/00 ,  B64D45/00 ,  G05D1/00 ,  G05D3/00 ,  G08B21/00

CPC分类号： G05D1/0055 ,  B64D45/0005 ,  B64D2045/001

摘要： The actuation system of the present invention is based upon sensing relatively small delta errors over relative short strokes as opposed to absolute travel error. An actuation system in accordance with the invention includes an actuator (30, 40, 50, 60, 70, 80, 90 and 100) attached to a structure (C) and an element (20, 21, 22, 23, 24 and 25) to be moved relative to the structure, the actuator causing movement of the element along a path of travel between travel limits (A and B) relative to the structure and having a failure mode when the actuator has moved more than a fixed distance relative to a reference position on the path of travel; a position transducer (34, 44, 54, 65, 74, 84, 94 and 104), coupled to the structure and to the element, for producing an output signal representing a position of the element along the path of travel, the position transducer having a position resolution error along the path of travel greater than the fixed distance; a processor (200), coupled to the output signal, for sampling the output signal periodically a plurality of times during the movement of the element along the path of travel and in response to samples producing a signal indicating if a failure mode has occurred and wherein a sampling rate of the periodic samples is chosen so that a distance that the actuator travels between successive samples times the position resolution error is less than the fixed distance.

摘要翻译： 本发明的致动系统基于相对于绝对行进误差来检测相对较短的行程的相对小的增量误差。 根据本发明的致动系统包括附接到结构（C）和元件（20,21,22,23,24和25）的致动器（30,40,50,60,70,80,90和100） ）相对于结构移动，致动器引起元件沿相对于结构的行进限制（A和B）之间的行进路径的移动，并且当致动器相对于该结构移动超过固定距离时具有故障模式 行程路线上的参考位置; 耦合到结构和元件的位置传感器（34,44,54,65,74,84,94和104），用于产生表示元件沿行进路径的位置的输出信号，位置传感器 沿行进路径具有大于固定距离的位置分辨率误差; 耦合到所述输出信号的处理器（200），用于在所述元件沿着所述行进路径移动期间周期性地多次对所述输出信号进行采样，以及响应于产生指示是否已经发生故障模式的信号的样本，并且其中 选择周期性样本的采样率，使得致动器在连续采样之间的距离乘以位置分辨率误差小于固定距离。