National Aerospace Laboratory Flight Research Division
National Aerospace Laboratory Control Systems Division
National Space Development Agency of Japan
The flight trials of the ALFLEX (Automatic Landing Flight Experiment) vehicle were successfully concluded on August 15, 1996, at Woomera Airfield in South Australia. The flight trials were held in winter under especially bad weather conditions such as cross winds and tail winds for the ALFLEX vehicle approaching runway 18. Therefore, wind measurement was extremely important. This paper describes the technique of making flight GO-NOGO decisions according to wind restrictions for ALFLEX trials based on both the wind speed data of Real Time Vector Representation Equipment (RTVRE) of surface wind and analysis of upper surface wind measurement data using Omega sonde and GPS sonde. It also compared these wind measurement results with the wind speed estimated using ADS (Air Data Sensor) and IMU (Inertial Measurement Unit) sensors that were onboard the ALFLEX vehicle.
ALFLEX飛行実験における風計測データを用いた飛行可否判断の手法と解析評価の結果
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