| Popis: |
The National Aerospace Laboratory (NAL) and the National Space Development Agency of Japan (NASDA), cooperating in the research and development of an unmanned reentry vehicle named HOPE (H-II Orbiting Plane), conducted a series of automatic landing flight experiments (ALFLEX). In the ALFLEX project, several constrained flight tests using gimbal support system were conducted before the first automatic landing trial. The purposes of these tests were to confirm the function and performance of the vehicle's control system and its aerodynamic characteristics. In this paper, the stability and performance of the flight control system are studied. In steady or quasi-static flight tests, the vehicle attitude was well stabilized around the trimmed condition. The step command responses for angle of attack, side slip angle, and roll angle were consistent with simulation results. |
