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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,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。
The embedded air data sensing (FADS) system has more advantages than the traditional angle-of-attack and side-slip angle sensors in measurement accuracy, reliability and stealth performance, so the system can be applied to various types of aircraft. However, due to the delay in obtaining the atmospheric parameters, the accuracy of the attack angle and the side slip angle of the system will decline when the aircraft is maneuvered. Aiming at this problem, a new FADS / INS combination angle of attack and side slip angle measurement method based on FADS measurement results is proposed, which is based on FADS measurement results and the angle of attack and slip angle changes measured by inertial navigation system (INS). The theoretical analysis and simulation results show that the combined system can obtain high accuracy of the measurement of the angle of attack and the side slip angle when the aircraft is in a smooth and maneuverable flight.