Flight system for an aircraft having an autoland system
First Claim
Patent Images
1. A method of operating an aircraft having an autoflight system comprising flight guidance functionality and autoland functionality providing input to a flight control system, the method comprising:
- flying the aircraft by providing input to the flight control system from a design assurance level (DAL) B or lower flight guidance program; and
in response to a request for autoland functionality, switching from the flight guidance program to a DAL A autoland program for providing input to the flight control system;
wherein the DAL A program resides in memory of a computer in the aircraft in a software partition separate from the flight guidance program and the switching ceases communication from the flight guidance program (DAL B) to the autoland program (DAL A) to provide data integrity.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system for operating an aircraft having an autoflight system comprising flight guidance functionality and autoland functionality providing input to a flight control system such that both the autoflight and autoland functionality and their corresponding systems are operated at a Design Assurance Level A.
22 Citations
16 Claims
-
1. A method of operating an aircraft having an autoflight system comprising flight guidance functionality and autoland functionality providing input to a flight control system, the method comprising:
-
flying the aircraft by providing input to the flight control system from a design assurance level (DAL) B or lower flight guidance program; and in response to a request for autoland functionality, switching from the flight guidance program to a DAL A autoland program for providing input to the flight control system; wherein the DAL A program resides in memory of a computer in the aircraft in a software partition separate from the flight guidance program and the switching ceases communication from the flight guidance program (DAL B) to the autoland program (DAL A) to provide data integrity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A flight system for an aircraft having multiple control surfaces for controlling the flight of the aircraft, the flight system comprising:
-
a flight control system receiving flight control inputs and controlling the operation of the control surfaces according to the flight control inputs; an avionics system comprising; at least one computer, with a corresponding memory; a flight guidance program, having a design assurance level (DAL) of B or lower, stored in the memory and providing control inputs for the flight control system to control the flying of the aircraft; an autoland program, having a DAL A, stored in the memory as a separate software partition from the flight guidance program and providing control inputs for the flight control system to control the automatic landing of the aircraft; and a switching program residing in the memory to control which of the flight guidance program (DAL B) and the autoland program (DAL A) provide the control inputs to the flight control system; wherein when the autoland program (DAL A) is selected by the switching program, the autoland program (DAL A) assumes control of the flight control system from the flight guidance program (DAL B) and the flight guidance program (DAL B) ceases communication with the autoland program (DAL A) to provide data integrity. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
Specification