利用10N推力器羽流试验数据建立羽流场数学模型

Modeling Plume Field Using Plume Test Data for 10N Thruster

利用MBB10N推力器羽流试验数据建立推力器羽流场的数学模型并确定其模型参数,以便利用此数学模型分析此类推力器对卫星的羽流干扰力、干扰力矩以及对太阳翼、敏感器的热效应等羽流污染。本文建立的羽流场数学模型不同于Simons羽流场数学模型及羽流特征线方法,但本质上仍满足羽流远流场为自由分子流的假设条件;本文建立的羽流场数学模型的非线性表达式更便于利用试验数据实现系统辨识,而且可达到相当满意的辨识准度。

By modeling plume field using MBB plume test data for 10N thruster and determining the model parameters, it is possible to use the mathematical model analyzing the plume disturbance force ,disturbance moment applied on the satellite and heat effects of the plume pollute on solar array, sensors, etc. The plume field model given in this paper is different from the Simons plume field model and the characteristic line plume field model, but still satisfies the hypothesis supposing the far plume flow field as the free molecular flow. The nonlinear expression of mathematical model of the plume field is easier to realize system parameter identification by using test data. It is also possible to obtain the satisfactory identification accuracy.