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    • 2. 发明授权
    • Electronic roll compensation system for a radar antenna
    • 用于雷达天线的电子滚轮补偿系统
    • US3943508A
    • 1976-03-09
    • US128105
    • 1971-03-25
    • Robert J. BoucherRobert L. Brackney, Jr.
    • Robert J. BoucherRobert L. Brackney, Jr.
    • G01S13/44G01S13/94G01S9/02G01S9/22
    • G01S13/94G01S13/4472
    • A simplified and reliable system for electronically controlling the angular position relative to an antenna axis of the ground areas from which radar signals are received and processed so that air-to-ground range may be measured accurately regardless of the roll angle of the aircraft in which the radar is mounted. In a radar silent lobing system in which lobing is done on reception of the transmitted signals, the roll compensation system provides direct current signals which are proportional to the sine and cosine of one-half the roll angle and which are selectively applied to the pole pairs of the azimuth and elevation poles of the ferrite modulator that is utilized in the lobing system. During range determining operations, first and second pole pairs each of an azimuth and elevation pole, or group of azimuth and elevation poles, are energized or selected during alternate lobing or pulse repetition frequency intervals. The system functions at any roll angle .alpha. by positioning the magnetic field of the modulator at .alpha./2 degrees so as to shift the components of the modulator input so that the vector sum at the output will be vertical, resulting in a constant output being provided to the radar receiver regardless of the roll angle of the aircraft.
    • 用于电子地控制相对于接收和处理雷达信号的地面区域的天线轴的角度位置的简化和可靠的系统,使得可以精确地测量空对地范围,而不管飞行器的滚动角度如何,其中 雷达被安装。 在雷达静音系统中,其中在接收到发送的信号时进行波动,滚转补偿系统提供直流电流信号,其与倾斜角度的一半的正弦和余弦成比例,并且选择性地施加到极对 的铁氧体调制器的方位角和高程极在利用系统中使用。 在范围确定操作期间,方位角和仰角或方位角和仰角组中的每一个的第一和第二极对在交替的跳跃或脉冲重复频率间隔期间被激励或选择。 该系统通过将调制器的磁场定位为α/ 2度来以任何侧倾角α进行功能,以便使调制器输入的分量移位,使得输出端的矢量和垂直,从而提供恒定的输出 无论飞机的滚动角度如何,都可以使用雷达接收器。
    • 5. 发明授权
    • Monopulse radar signal processing for rotorcraft brownout aid application
    • 单脉冲雷达信号处理,用于旋翼飞行器的欠压辅助应用
    • US07633429B1
    • 2009-12-15
    • US12357921
    • 2009-01-22
    • Guoqing LiuKen Yang
    • Guoqing LiuKen Yang
    • G01S13/44
    • G01S13/94G01S13/4445G01S13/4472
    • A method, system and computer program is disclosed for reducing range and angular ambiguities in a target data matrix output from a real beam monopulse radar sensor within a single beam for use in terrain morphing applications employed by brownout take-off and landing aid systems. One or more range bins are calculated to selectively determine one or more range segments from one or more targets of interest. Range resolution enhancement processing is employed to the selectively determined one or more range segments to obtain a range of target scatter locations. A monopulse angle bin is estimated from the obtained range of target scatter locations and one or more control inputs. Elevation and azimuth angular binning is applied to the estimated monopulse angle bin to obtain a smaller coverage area among one or more possible target areas. One or more shortest-range bins in a two-dimensional (2D) azimuth and elevation grid is selected from the smaller coverage area, which generate the target data output matrix from the selected one or more shortest-range bins in the two-dimensional (2D) azimuth and elevation grid.
    • 公开了一种方法,系统和计算机程序,用于减少在单个波束内的实际波束单脉冲雷达传感器输出的目标数据矩阵中的范围和角度模糊度,以用于由掉电起降和着陆援助系统采用的地形变形应用。 计算一个或多个范围箱以选择性地确定来自一个或多个感兴趣目标的一个或多个范围段。 使用范围分辨率增强处理来选择性地确定一个或多个范围段以获得目标散射位置的范围。 从获得的目标散射位置的范围和一个或多个控制输入估计单脉冲角箱。 对估计的单脉冲角度箱施加仰角和方位角合并,以在一个或多个可能的目标区域中获得较小的覆盖区域。 从较小的覆盖区域中选择二维(2D)方位角和仰角网格中的一个或多个最短范围区块,其从所选择的一个或多个最短范围区域生成目标数据输出矩阵(二维(2D) 2D)方位角和仰角网格。
    • 6. 发明授权
    • High range resolution radar system
    • 高分辨率雷达系统
    • US5629705A
    • 1997-05-13
    • US605341
    • 1996-02-09
    • Aaron SpettelAnthony J. Sarantakis
    • Aaron SpettelAnthony J. Sarantakis
    • F41G7/22G01S7/41G01S13/44G01S13/72G01S13/88
    • G01S13/723F41G7/2213F41G7/2246F41G7/2286G01S7/411G01S13/4472G01S13/883
    • A radar system is provided to track radar energy reflected by a point on the target different from the centroid of a target's radar reflected energy. The radar system includes a target angle/range tracking system and a target energy monitoring/range tracking system. During a first mode of operation, the target angle/range tracking system tracks the centroid of the target's reflected energy; and, the target energy monitoring/range tracking system monitors the strength of energy reflected from points, or regions along the body of the target different from the centroid reflected energy producing region. When the signal strength to noise ratio (i.e., S/N ratio) from a reflection at one of the monitored points along the target exceeds a predetermined level indicating detection of a secondary reflector along the body of the target, a second operation mode commences. During the second operating mode, the target angle/range tracking system tracks the energy from the secondary reflector and the target energy monitoring/range tracking system monitors energy reflected from points along the target's body different from the secondary reflector.
    • 提供一种雷达系统来跟踪目标雷达反射的雷达能量,不同于目标雷达反射能量的重心。 雷达系统包括目标角度/距离跟踪系统和目标能量监测/距离跟踪系统。 在第一种操作模式下,目标角度/距离跟踪系统跟踪目标反射能量的质心; 并且目标能量监测/距离跟踪系统监测从与重心反射能量产生区域不同的沿着身体的点或区域反射的能量的强度。 当沿着目标的一个监视点处的反射的信号强度与噪声比(即,S / N比)超过指示沿着目标的身体检测次级反射器的预定水平时,开始第二操作模式。 在第二操作模式期间,目标角度/距离跟踪系统跟踪来自辅助反射器的能量,并且目标能量监视/距离跟踪系统监测从与次级反射器不同的沿着目标体的点反射的能量。
    • 8. 发明授权
    • Tracking system utilizing Kalman filter concepts
    • 跟踪系统利用卡尔曼滤波器概念
    • US3952304A
    • 1976-04-20
    • US418693
    • 1973-11-23
    • Laurence E. BroniwitzJohn B. Pearson, IIIMark I. Landau
    • Laurence E. BroniwitzJohn B. Pearson, IIIMark I. Landau
    • F02B75/02G01S13/44G01S13/72H01Q1/42G01S9/22
    • H01Q1/421G01S13/4472G01S13/72F02B2075/027
    • A monopulse radar tracking system is disclosed employing four tracking channels, one for each of range, velocity, azimuth and elevation. The two angle channels are referenced directly to antenna coordinates. Each channel is mechanized by a stored program in a digital computer, and the mechanization employs Kalman filtering with gain factors continually optimized for measured signal-to-noise ratios. Angular rate commands for the antennas are obtained by passing pointing error estimates from the angle channels through a compensator for antenna motion and adding line-of-sight rate estimates from the angle filter channels. Cross-coupling between channels is provided, and each channel is aided by outputs from an inertial navigation platform. Preaveraging of discriminants received between computational cycles is provided.
    • 公开了一种单脉冲雷达跟踪系统,其采用四个跟踪通道,每个跟踪通道一个用于范围,速度,方位角和仰角。 两个角度通道直接参考天线坐标。 每个通道由数字计算机中的存储程序机械化,机械化采用卡尔曼滤波,其增益因子针对测量的信噪比进行不断优化。 通过将来自角度通道的指示误差估计通过用于天线运动的补偿器并且从角度滤波器通道增加视距速率估计来获得天线的角速率命令。 提供通道之间的交叉耦合,每个通道由惯性导航平台的输出辅助。 提供了在计算周期之间接收的识别符的预处理。