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您的检索式：作者名="ZHA Qicheng"
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| 1 | An Algorithm for Determination of Projectile Attitude Angles in Projectile Trajectory Prediction显示文摘A fast and accurate algorithm is established in this paper to increase the precision of ballistic trajectory prediction.The algorithm is based on the six-degree-of-freedom(6 DOF)trajectory equations,to estimate the projectile attitude angles in every measuring time.Hereby,the algorithm utilizes the Davidon-Fletcher-Powell(DFP)method to solve nonlinear equations and Doppler radar trajectory test information containing only position coordinates of the projectile to reconstruct the angular information.The″position coordinates by the test″and″angular displacements by reconstruction″at the end phase of the radar measurement are used as an initial value for the trajectory computation to extrapolate the trajectory impact point.The numerical simulations validate the proposed method and demonstrate that the estimated impact point agrees very well with the real one.Morover,other artillery trajectory can be predicted by the algorithm,and other trajectory models,such as 4 DOF and 5 DOF models,can also be incorporated into the proposed algorithm. | Zha Qicheng Rui Xiaoting Yu Hailong Zhou Qinbo | 2018 | Transactions of Nanjing University of Aeronautics and Astronautics2018，35，2： | 0 |
| 2 | Ballistic Trajectory Extrapolation and Correction of Firing Precision for Multiple Launch Rocket System显示文摘The research on multiple launch rocket system(MLRS)is now even more demanding in terms of reducing the time for dynamic calculations and improving the firing accuracy,keeping the cost as low as possible.This study employs multibody system transfer matrix method(MSTMM),to model MLRS.The use of this method provides effective and fast calculations of dynamic characteristics,initial disturbance and firing accuracy.Further,a new method of rapid extrapolation of ballistic trajectory of MLRS is proposed by using the position information of radar tests.That extrapolation point is then simulated and compared with the actual results,which demonstrates a good agreement.The closed?loop fire correction method is used to improve the firing accuracy of MLRS at low cost. | ZHA Qicheng RUI Xiaoting WANG Guoping YU Hailong | 2019 | Transactions of Nanjing University of Aeronautics and Astronautics2019，36，2： | 0 |
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