초록 ▼

A navigation system for tracking the position of an object includes a GPS receiver responsive to GPS signals for periodically providing navigation state measurement updates to a navigation processor. The system also includes a dead-reckoning sensor responsive to movement of the object for providing

A navigation system for tracking the position of an object includes a GPS receiver responsive to GPS signals for periodically providing navigation state measurement updates to a navigation processor. The system also includes a dead-reckoning sensor responsive to movement of the object for providing movement measurements to the navigation processor. The navigation processor determines object navigation states using the navigation state measurement updates and propagates the object navigation states between measurement updates using the movement measurements.

대표청구항 ▼

1. A navigation system for providing navigation information related to the movement of an object, comprising:a global positioning satellite (GPS) receiver mounted to the object for receiving GPS signals and providing GPS measurements; a navigation update unit receiving as input an updated dead-recko

1. A navigation system for providing navigation information related to the movement of an object, comprising:a global positioning satellite (GPS) receiver mounted to the object for receiving GPS signals and providing GPS measurements; a navigation update unit receiving as input an updated dead-reckoning measurement and the GPS measurements, and providing as output navigation measurements and a modified dead-reckoning position measurement, wherein the navigation update unit comprises a filter for estimating changes in speed bias and speed scale factor from a measurement derived from an estimated velocity value; at least one inertial sensor mounted to the object, sampling movement measurements and providing as output the movement measurements; a sensor update unit receiving as input the navigation measurements and the movement measurements and providing as output position changes; and a navigation propagation unit receiving as input the position change and the modified dead-reckoning measurement and providing as output the updated dead-reckoning measurement.