Abstract: An antiaircraft fire control calculation method based on rigid body trajectory model is proposed for improving the versatility and real-time performance of fire control system. The target measurements are unbiasedly converted, and the noise covariance matrix is decoupled, which accurately estimates the target state and reduces the computational complexity of the filtering algorithm. The hit point is calculated by using the secant iteration method, and the firing data are corrected by the virtual miss distance in each iteration, which reduces the time of calculating the ballistic differential equation and greatly improves the speed of fire control calculation. The simulated results demonstrate the validness and feasibility of the proposed method. The firing data can be calculated more accurately, and the calculated amount is significantly improved compared with the traditional fire control calculation method.

Key words: firecontrolsystem, unbiasedconverting, rigidbodytrajectorymodel, virtualmissdistance, firingdata