The control force can be mismatched on pitch and yaw plane for plane-symmetric launch vehicle,a control method named BTW(bank-to-wind)was proposed to solve the problem,which adjusts the windward side according to rolling program angle to decrease the maximum engine deflection.The off-line method of BTW control was studied,the analytical solution of the theoretical value of BTW control rolling program angle was derived,and it was proved that the deviation of the theoretical value is the same order as the flight attitude deviation.A fitting algorithm based on Fourier series with weights was proposed to modify the rolling program angle,ensuring engineering feasibility.Six-degree-of-freedom flight dynamics simulations were conducted to analyze the impact of BTW control on control forces,aerodynamic loads,and the tracking quality of the program angle,thereby verifying the effectiveness of BTW control.By comparing the simulation results of different fitting base frequencies,it is concluded that excessively high fitting frequencies can affect control quality.From an engineering perspective,the"smoothness"of the rolling program angle is more important than its"fitting accuracy".
关键词
面对称运载火箭/迎风滚转/风干扰/控制力
Key words
plane-symmetric launch vehicle/bank-to-wind/wind disturbance/control force
维普
万方数据