公开(公告)号：US4084160A

公开(公告)日：1978-04-11

申请号：US682019

申请日：1976-04-30

申请人： Urs Leuenberger ,  Albert Schenkel

发明人： Urs Leuenberger ,  Albert Schenkel

IPC分类号： G01S7/02 ,  G01S13/44 ,  G01S13/68 ,  G01S3/80

CPC分类号： G01S13/4418

摘要： An arrangement for correcting deviations from the true bearing due to the effects of specular reflecting surfaces in target tracking radar installations having at least three primary feeds. At least two of the primary feeds are aligned such that a plane formed by the longitudinal axes of their radiation characteristics is disposed at least approximately perpendicular to the specular reflecting surface. At least one further primary feed is arranged such that the longitudinal axis of its radiation characteristic is located externally of such plane. A summation-difference network produces from the echo signals received by the primary feeds, apart from a summation signal, also two difference signals, and a cross-term signal formed in at least one measurement interval. From these signals there is produced an angle error signal which is divided into two components. In a signal processing stage there is obtained a correction signal in order to correct the angle error signal falsified by the specular reflection effects.

公开(公告)号：US4219816A

公开(公告)日：1980-08-26

申请号：US972886

申请日：1978-12-26

申请人： Albert Schenkel ,  Urs Leuenberger

发明人： Albert Schenkel ,  Urs Leuenberger

IPC分类号： G01S13/44 ,  G01S13/68 ,  G01S9/22

CPC分类号： G01S13/4418

摘要： Radar tracking or homing units employing three or more primary radiators and utilizing an arrangement of a sum-difference network and signal processing stage to form sum, difference and cross-related or cross-term signals and to effect correction of errors introduced due to the presence or apparent presence of two targets with the resolvable radar volume, using a stipulated method of signal processing.

摘要翻译： 使用三个或更多个一次辐射器并利用和差网络和信号处理阶段的布置的雷达跟踪或归位单元以形成和，差异和交叉相关或交叉项信号，并且实现由于存在导致的错误的校正 或具有可分辨雷达体积的两个目标的明显存在，使用规定的信号处理方法。

公开(公告)号：US3979910A

公开(公告)日：1976-09-14

申请号：US351596

申请日：1973-04-16

申请人： Urs Leuenberger ,  Rodney Lash LeRoy

发明人： Urs Leuenberger ,  Rodney Lash LeRoy

IPC分类号： F15B7/00 ,  F16H43/00 ,  F16D31/02

CPC分类号： F15B7/006 ,  F16H43/00

摘要： A closed circuit hydraulic control system for an hydraulic motor including a cylinder, a piston movable in such a cylinder, and a rod connected to one side of the piston, such cylinder having a blind end and a rod end through which the rod extends. A reversible circulating pump having two ports is provided for supplying fluid under pressure to the blind end and to the rod end respectively of the cylinder. A first tubing interconnects the blind end of the cylinder to one port of the reversible pump, whereas a second tubing interconnects the rod end of the cylinder to the other port of the reversible circulating pump. Means are provided to accommodate the volume of fluid displaced by the rod as the piston is moved toward the blind end of the cylinder.

摘要翻译： 一种用于液压马达的闭路液压控制系统，其包括气缸，可在该气缸中移动的活塞，以及连接到活塞一侧的杆，该气缸具有盲端和杆端延伸的杆端。 提供具有两个端口的可逆循环泵，用于将压力下的流体分别供应到气缸的盲端和杆端。 第一管将汽缸的盲端连接到可逆泵的一个端口，而第二管将汽缸的杆端与可逆循环泵的另一端口相互连接。 提供装置以适应当活塞向气缸的盲端移动时被杆移动的流体的体积。