FADS/INS组合法迎角、侧滑角测量方法研究

嵌入式大气数据传感(FADS)系统比传统迎角、侧滑角传感器在测量精度、可靠性、隐身性能上都具有较大的优势,因此该系统可被应用于各型飞行器上。但由于该系统在获得大气参数方面存在延时,所以,它在飞行器机动飞行状态下,迎角和侧滑角的测量精度会下降。针对这一问题,本文提出了以FADS测量结果为基础,采用惯性导航系统(INS)测量的迎角、侧滑角变化量进行修正的FADS/INS组合法迎角、侧滑角测量方法。理论分析和仿真结果表明,该组合系统在飞行器处于平稳和机动飞行时,对迎角、侧滑角的测量均能获得较高精度。

A FADS/INS Combined Method for Measurement of Angle of Attack and Sideslip

Compared with conventional air data sensing system,the flush air data sensing(FADS) system has greater advantages in measuring accuracy,reliability and stealth capabilities.As a result,FADS system can be applied in different kinds of advanced vehicles.However,there is a certain delay when FADS system measures air data parameters,so the accuracy of measurements,such as angle-ofattack and sideslip in maneuver,will be reduced.For the above problem,a combined FADS/INS based method of measurement of angle of attack and sideslip is proposed in this paper,in which the results of angles of attack and sideslips from a FADS system will be corrected using the measurement data from an INS.Finally,a simulation is conducted to demonstrate the feasibility of the method,and the simulation results show that a higher measurement accuracy for angle of attack and sideslip angle can be got by using the combined method in steadystate and maneuver conditions.