Brain O2 Reserve Limiter for High Performance Aircraft.
Patent, Filed 7 Apr 87, patented 18 Apr 89,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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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
- Flight Control and Instrumentation
- Human Factors Engineering and Man Machine Systems
- Military Aircraft Operations