基于最小二乘法的弹体参数辨识工程算法

Engineering Algorithm of Missile Parameter Identification Based on Least Square Method

针对导弹弹体参数辨识问题,以轴向过载为观测量,在发动机地面点火试验推力数据和导弹风洞试验气动数据基础上,设计了推力修正系数和阻力修正系数,并分别建立了导弹发射增速段、续航飞行段和无动力滑行段最小二乘法弹体参数辨识模型,解决了传统最小二乘法辨识方程病态问题,仿真结果验证了该算法的有效性和正确性。该算法适用于导弹工程研制。

To slove the missile body parameter identification problem, taking the missile axial overload as measurement variable, thrust correction coefficient and resistance correction coefficient are designed on the basis of thrust data in the engine ground ignition test and aerodynamic data in missile wind tunnel test. And missile body parameter identification model of least square method is established, respectively for launch speeding state, constent-speed flying state and sliding state with no thrust. The problem of the traditional least square identification equation is solved, and the simulation results proved the effectiveness and correctness of the algorithm. This algorithm is very suitable for missile engineering development.