||Guidance Law Based on Real-time Trajectory Prediction for D-SEND#2
Suzuki, Hirokazu ,
Ninomiya, Tetsujiro ,
鈴木, 広一二宮, 哲次郎
宇宙航空研究開発機構研究開発報告=JAXA Research and Development Report
16 , 2018-02-22 , Japan Aerospace Exploration Agency (JAXA) , 宇宙航空研究開発機構(JAXA)
A flight experiment using a stratospheric balloon, designated as D-SEND#2, was carried out in 2015. This paper describes a guidance law of the D-SEND#2 vehicle. A typical problem of flight experiment using a stratospheric balloon is that it has no nominal trajectory. Therefore, a new real-time trajectory prediction method is devised to overcome this problem. The method solves equations of motion directly for various load factor commands. The guidance law was evaluated using Monte Carlo simulation, and its result was the success rate of 98.1%. The guidance law has a little tolerance to the uncertainty of steady wind and of the model error of drag coefficient because the vehicle has no engine nor devices for velocity control. Actual flight experiments demonstrated that the guidance law satisfied all mission requirements and that it contributed greatly to the mission success.
Physical characteristics: Original contains color illustrations