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    • 1. 发明授权
    • Shipboard antenna pointing and alignment system
    • 船载天线指向和对准系统
    • US4823134A
    • 1989-04-18
    • US181114
    • 1988-04-13
    • Michael R. JamesJohn J. Maney
    • Michael R. JamesJohn J. Maney
    • G05D3/14H01Q1/12H01Q1/18H01Q3/00G01S5/02
    • G05D3/1454H01Q1/125H01Q1/18
    • A mechanism for correcting for time-varying errors that affect the pointing accuracy of a shipboard mounted antenna employs a Kalman filter for realizing an optimal correction estimator through which inputs to the antenna aiming control hardware are adjusted. A series of coordinate system transformations, corrected by the Kalman filter error estimator, are carried out to provide a command input to an antenna pointing servo system. The servo control system produces a servo error signal representative of a deviation in the actual direction of the antenna pointing mechanism from the command input to the servo loop as defined by the corrected aiming signal. The actual direction in which the servo control system points the antenna is compared with a reference (the actual direction to the satellite). As a result of this comparison, a pointing deviation signal representative of any offset from the intended pointing direction is generated. Because this pointing deviation signal depends upon the output of the servo control mechanism, it inherently contains any error in that output. Such error is removed by subtracting the servo error signal from the pointing deviation signal and applying the resultant difference signal to the Kalman filter error estimator.
    • 用于校正影响船上安装天线的指向精度的时变误差的机构使用卡尔曼滤波器来实现最佳校正估计器,通过该最佳校正估计器调整对天线瞄准控制硬件的输入。 执行由卡尔曼滤波器误差估计器校正的一系列坐标系变换,以向天线指向伺服系统提供命令输入。 伺服控制系统产生伺服误差信号,其代表天线指向机构的实际方向与由校正的瞄准信号定义的伺服环路的命令输入的偏差。 将伺服控制系统指向天线的实际方向与参考(与卫星的实际方向)进行比较。 作为该比较的结果,生成表示与预期指示方向的任何偏移的指示偏差信号。 因为该指向偏差信号取决于伺服控制机构的输出,所以它固有地包含该输出中的任何误差。 通过从指向偏差信号减去伺服误差信号并将得到的差分信号应用于卡尔曼滤波器误差估计器来消除这种误差。
    • 8. 发明授权
    • System and method for object recognition based on three-dimensional adaptive feature detectors
    • 基于三维自适应特征检测器的物体识别系统和方法
    • US08687898B2
    • 2014-04-01
    • US12697808
    • 2010-02-01
    • Danil V. ProkhorovMichael R. James
    • Danil V. ProkhorovMichael R. James
    • G06K9/62
    • G06K9/00
    • Method and system for imaging an object in three-dimensions, binning data of the imaged object into three dimensional bins, determining a density value p of the data in each bin, and creating receptive fields of three dimensional feature maps, including processing elements O, each processing element O of a same feature map having a same adjustable parameter, weight Wc1. The density values p are processed with the processing elements O to determine an output value o for at least each three dimensional location of the imaging of the object having a density value p above a predetermined threshold value. An object is classified by processing the output values o with a committee of classifiers, and the classification of the object is communicated.
    • 用于将成像对象的三维数据成像成三维仓的方法和系统,确定每个仓中的数据的密度值p,以及创建三维特征图的接收场,包括处理元素O, 相同特征图的每个处理元件O具有相同的可调参数,权重Wc1。 密度值p用处理元件O处理,以确定具有高于预定阈值的浓度值p的物体的成像的至少每个三维位置的输出值o。 通过用分类器委员处理输出值o来分类对象,并传达对象的分类。