推力上昇における有翼ロケット実験機の飛行制御系設計

抄録

Kyushu Institute of Technology has been developing experimental winged rocket for fully reusable space transportation system since 2005. WIRES#015, the subscale flight model of suborbital vehicle will be launched from Mojave Desert, California in 2020. The LOX-LNG engine employed for this vehicle has thrust vector control (TVC) system to improve the control performance during the ascent phase when dynamic pressure is still low. However, when the vehicle experiences maximum dynamic pressure, the natural frequency of the vehicle’s dynamics may become higher than cut-off frequency of TVC actuator, and the actuator performance becomes saturated. In this research, the attitude control law in the longitudinal and lateral-directional motion using TVC and aerodynamic control surfaces for a powered ascent was designed based on eigenvalue analysis. The response of attitude angle and TVC actuator performance was evaluated based on non-linear flight simulation. In this simulation, the TVC actuator model with saturation characteristic is taken into account.