The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2003
Filed:
Apr. 12, 2001
Henri Leblond, Versailles, FR;
Jean-René Chevalier, Cenon s/Vienne, FR;
Edouard Escobar, Villiers /Loir, FR;
Thomson-CSF Sextant, Velizy Cillacoublay, FR;
Abstract
The present invention relates to back-up instruments for aiding the piloting of an aircraft, which instruments are intended to provide, with high security of operation, indications relating to the pressure altitude, the conventional speed and the attitude (angles of roll and of pitch) of the aircraft, this being for the purpose of serving both as reference for the control of the proper operation of the main systems of on-board and back-up instruments in the event of a fault with the main system or systems of on-board instruments. It relates more particularly to combined back-up instruments including an electronic portion endowing them with a degree of calculational power. It consists in providing, in these combined back-up instruments which operate exclusively on the basis of measurements of total pressure and of static pressure and inertial measurements originating from their own sensors, a correction of the static pressure measurement error due to the aerodynamic angle of incidence of the aircraft as computed solely on the basis of the information already at the disposal of these back-up instruments, doing so in order to improve the accuracy of the indication of pressure altitude without thereby increasing the cost or reducing the safety of operation of the combined back-up instruments.