COMPUTER SCIENCE AND AIRPLANES
- TRAFFIC COLLISION AVOIDANCE SYSTEM (TCAS)
YIXIN ZENG
FIRST CIVIL AIR COLLISON AVIATION TRAGEDY CAUSE >100 DEATH
• GRAND CANYON MID-AIR COLLISION IN 1956.
THE 1956 GRAND CANYON MID-AIR COLLISION
A United Airlines Douglas DC-7
From: Flight origin Los Angeles Int'l Airport Los Angeles Int'l Airport
Destination Chicago Midway Airport Kansas City Downtown Airport
Passenger / crew
53/5 64/6
A Trans World Airlines Lockheed L-1049,
FIRST GENERATION TCASⅠ • THEORY:• INTERROGATES OTHER AIRCRAFT• OTHER AIRCRAFT REPLY TO OTHER INTERROGATIONS
• AIR COMPUTER:• CALCULATE AND NOTICE PILOT POTENTIAL AIR COLLISION • VIA AIRSPEED, ALTITUDE, DIRECTION, PROMOTION AND DEMOTION RATIO,
TCASⅡ Give RA solution
coordinate resolution before issue to commands
TA, RA, region
• BOTH CONCEPT AND NOT IMPLEMENT• TCASⅢ TRY TO GENERATE A HORIZONTAL MANEUVER • TCASⅣ SIMILAR THEORY WITH ADS-B
TCASⅢ & TCASⅣ
• WINDSHEAR DETECTION • GROUND PROXIMITY WARNING SYSTEM (GPWS) ALERTS• AIR TRAFFIC CONTROL (ATC) INSTRUCTIONS ---JULY 1, 2002 ÜBERLINGEN
DISASTER
PRIORITY
CURRENT LIMITATIONS• TCAS2 ONLY PROVIDE VERTICAL ADVISORIES• INDEPENDENCE SYSTEM • LACK OF TERRAIN/GROUND AND OBSTACLE AWARENESS• UNIT, NOT INTUITIVE
THANKSQUESTION?