초록 ▼

A self contained, self powered microprocessor controlled aircraft ejection seat escape parachute deployment sequencer which can handle problems caused by high altitudes into the stratosphere and by high speeds above Mach 1, and which will deploy the parachute, based on seat mounted pitot tube and am

A self contained, self powered microprocessor controlled aircraft ejection seat escape parachute deployment sequencer which can handle problems caused by high altitudes into the stratosphere and by high speeds above Mach 1, and which will deploy the parachute, based on seat mounted pitot tube and ambient pressure readings plus stored data, when speed and altitude are at human physiologically acceptable levels. Many failsafes to cope with unusual conditions, and additional features are also included.

대표청구항 ▼

In an aircraft ejection seat, the combination comprising: a parachute and means carried by the seat to deploy the parachute; left and right pitot tubes carried by the seat; means carried by the seat to sense ejection of the seat from the aircraft; a pair of redundant housings carried by the seat; ea

In an aircraft ejection seat, the combination comprising: a parachute and means carried by the seat to deploy the parachute; left and right pitot tubes carried by the seat; means carried by the seat to sense ejection of the seat from the aircraft; a pair of redundant housings carried by the seat; each one of said pair of housings including therein a microprocessor controlled sequencer (MCS); each said MCS including means to activate said means to deploy said parachute, pressure sensor means to sense the pressures detected by said left and right pitot tubes and to sense the ambient pressure local to said seat and to produce signals proportional to said three sensed pressures of said pitot tubes and ambient pressures, data storage means, battery means, switch means, and control means; each said data storage means including ROM memory means in which data corresponding to preset control functions and system performance have been previously stored, and said data storage means further comprising RAM memory for active use during an escape sequence with the data in said ROM memory together with data produced by said pressure sensor means corresponding to said left and right pitot tube and to the local ambient pressures to continuously optimize operation of an escape sequence as it occurs; each of said MCS control means being operative independently of its companion redundant MCS control means to cause said optimum operation and parachute deployment after seat/ejectee ejection from the aircraft when said MCS determines one or both of: A. the seat/ejectee mass is moving at a speed equal to or less than a predetermined speed that is safe for parachute deployment at the prevailing altitude and that the altitude of the seat/ejectee mass above sea level is below a predetermined safe altitude; and B. a time delay has elapsed, which time delay was set by the MCS to the minimum value for safe parachute deployment for a normal ejection based upon the pressure, altitude and airspeed measured by the pressure sensors in the MCS; each said MCS including means to make said determinations based upon said three pressure signals, the data stored in said data storage means, the elapsed time of operation of said switch means, and utilizing the electrical power in said battery means; and each said switch means being operated at the time of ejection of said seat from the aircraft.