초록 ▼

An improved navigation and display system especially suitable for small aircraft rapidly determines the attitude (roll and pitch) of an aircraft from measurements made by an inexpensive, single receiver and antenna responsive to signals obtained from a satellite positioning system, e.g., the Global

An improved navigation and display system especially suitable for small aircraft rapidly determines the attitude (roll and pitch) of an aircraft from measurements made by an inexpensive, single receiver and antenna responsive to signals obtained from a satellite positioning system, e.g., the Global Positioning System. In contrast to conventional attitude navigation systems, which determine and display conventional (body-axis referenced) pitch angle, the present system determines and displays the "pseudo-attitude" or stability axis roll and pitch (flight path) angle, so that the pilot has an instantaneous comprehension of the actual flight path angle of the aircraft without needing to correct for angle of attack as in conventional attitude information systems. A Kalman filter with a short (.about.0.5 second) time constant provides data at a sufficient rate (e.g., .about.10 Hz) to enable real-time flight with the system. With the additional availability of measured or estimated angle of attack, this system can also display conventional roll and pitch attitude angles. The pseudo-attitude data is incorporated into an integrated flight information system which derives all its data from the single GPS sensor and which presents all the information needed for navigation and control of the aircraft in which it is mounted.

대표청구항 ▼

1. A navigation system for mounting on a vehicle for determining the stability axis flight path angle .gamma. and stability axis roll angle .phi.s of said vehicle while undergoing arbitrary but balanced maneuvers along a flight path through space with respect to a reference frame, said system compri

1. A navigation system for mounting on a vehicle for determining the stability axis flight path angle .gamma. and stability axis roll angle .phi.s of said vehicle while undergoing arbitrary but balanced maneuvers along a flight path through space with respect to a reference frame, said system comprising:A. a navigation processor including: (1) measuring means for measuring at least one of the position or velocity of said vehicle as it moves along said path; (2) means responsive to said measurements for extracting estimates of the velocity and acceleration of said vehicle at successive positions along said path; and (3) processing means for calculating the flight path angle .gamma. and stability axis roll angle .phi.s corresponding to said estimates; and B. a navigation display for displaying said angles for navigating said vehicle in accordance therewith.