一种运载火箭减载控制工程方法

An Engineering Method on the Control of Decreasing Load for a Launch Vehicle

为降低运载火箭飞行中的气动载荷,在改进弹道模型的基础上,提出了一种用实时补偿对实时气流攻角和侧滑进行反馈控制的方法。研究了工程上用实时视加速度与姿态角偏差近似获得实时攻角和侧滑角的方法,并给出了控制模型。仿真结果表明,该方法能有效降低火箭的qα值,且对关机点参数的影响不大。

To decrease aerodynamic load in the flying of launch vehicle, a method of compensation in real time to control feedback of flow angle of attack an sideslip angle was put forward on the basis of advanced trajectory module in this paper. The method to aquire the angle of attack and sideslip approximately in engineering by the deviation between apparent acceleration and attitude angle was analyzed, and the control model was given. The simulation results showed that this method was feasible which could decrease the qα of launch vehiel, and the influence on the parameters at the position of shut-down was small.