A Switching-Based Interference Control for Booster Separation of Hypersonic Vehicle

Whether launching from the ground or in air, hypersonic vehicles need booster to accelerate a predetermined window, so as meet requirements of scramjet engine ignition. Therefore, there is interference suppression between boosters and under high dynamic pressure, which has become key technical problem that affects success flight tests, especially when aircraft statically unstable. A method variable structure switching-based control proposed this paper for rapid on vehicle separation interference. Switching systems real time according state changes caused by flow field interference, can keep attitude stability pressure static instability. The aerodynamic calculation model process established first, adopts an unsteady solution clarifies characteristics afterbody separation. Then, field, dynamics out area are converted into subsystems with switching characteristics. Using dimension reduction method, surface system established. On basis orbital change be switched achieve stable Meanwhile, considering additional torque generated process, designed. Simulation results verify designed rapidly suppress about 150 kPa instability 5%, thereby realizing vehicle.