ALTITUDE ALERT SYSTEM FOR AIRCRAFT OPERATING IN REDUCED VERTICAL SEPARATION MINIMUM AIRSPACE AND METHOD THEREFOR

摘要

A triple-redundant altitude alert system includes a digital air data computer (400), redundant pilot and copilot altimeters (100) and airspeed indicators (200), and an altitude alerter (300). The computer, altimeters, and airspeed indicators are operable for simultaneous, independent pressure measurement using respectively integral pressure transducers that are separately connected to the aircraft Pilot-static pressure system (26). Although the altimeter and airspeed indicator normally operate as repeaters for the computer, they are also able to compare the data received from the computer with data sensed by their integral transducers to determine if the computer and self-sensed data are valid. A pressure transducer integral with the airspeed indicator is operated outside its specified pressure range and produces a non-linear output over a portion of the aircraft operating airspeed range.