Accession Number : ADD014137

Title :   Brain O2 Reserve Limiter for High Performance Aircraft.

Descriptive Note : Patent, Filed 7 Apr 87, patented 18 Apr 89,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Van Patten, Robert E

Report Date : 18 Apr 1989

Pagination or Media Count : 6

Abstract : A method for controlling an aircraft to prevent high G-caused pilot unconsciousness is disclosed. Data defining a state space of acceleration, rate of change of acceleration and duration of acceleration at maximum acceleration within which an aircraft may be operated without causing pilot unconsciousness is provided to an aircraft intelligent flight control system. The flight control system continuously monitors the past and present state of the aircraft and compares to the surface boundaries of the defined safe state space. Whenever the aircraft exceeds those boundaries, the flight control system intervenes to unload the aircraft to within those boundaries. Additional data and measurements may be added to define an n-dimensional state space. Another embodiment unloads the aircraft to a baseline acceleration. A simplified embodiment is described which compares current acceleration to a preselected value of acceleration. If the current acceleration exceeds the preselected value, the previous acceleration onset rate is compared to a preselected acceleration onset rate. If it exceeds the preselected onset rate, the duration of time the current and immediately past acceleration has exceeded the preselected value of acceleration is determined. If that value is greater than a preselected duration, the flight control system commands the aircraft ot perform an unloading maneuver to reduce the G loading on the aircraft to a preselected baseline acceleration. Keywords: Patents. (AW)

Descriptors :   *ACCELERATION, *FLIGHT CONTROL SYSTEMS, *PATENTS, *HUMAN FACTORS ENGINEERING, *ARTIFICIAL INTELLIGENCE, AIRCRAFT, BASE LINES, BLACKOUT(PHYSIOLOGY), BOUNDARIES, HIGH RATE, MANEUVERS, PERFORMANCE(ENGINEERING), PILOTS, AVIATION SAFETY, SURFACES, TIME, UNLOADING, ACCELERATION TOLERANCE, MONITORS

Subject Categories : Flight Control and Instrumentation
      Human Factors Engineering & Man Machine System
      Military Aircraft Operations

Distribution Statement : APPROVED FOR PUBLIC RELEASE