A method for estimating angle of attack and sideslip angle for flight in atmospheric disturbance
A technology of atmospheric disturbance and sideslip angle, which is applied in the direction of indicating/recording actions, instruments, speed/acceleration/shock measurement, etc., and can solve problems such as difficulty in ensuring filter stability and lack of basis for the initial value of Kalman filter
Active Publication Date: 2020-11-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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[0006] The purpose of the invention of the present invention is to provide a method for estimating the angle of attack and sideslip angle for flying in atmospheric disturbances, which realizes the accurate estimation of the angle of attack and sideslip angle under turbulent flow disturbance wind, and solves the problem of the above-mentioned background technology. The estimation of aircraft angle of attack and sideslip angle does not conform to the basic premise that the disturbance wind first affects the airflow angle and then affects the track angle, and the initial value of the Kalman filter lacks a basis, and it is difficult to ensure the stability of the filter.
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[0017] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0018] Such as figure 1 As shown, a method for estimating the angle of attack and sideslip angle for flight in atmospheric disturbance disclosed by the present invention includes the following five steps in sequence.
[0019] Step 1: Establish mass model, aerodynamic model and engine performance model respectively according to the modeling data of a certain model. Obtain the flight data of a certain flight of the aircraft type, and obtain the noise characteristics of the relevant data according to the flight record specifications.
[0020] The aircraft mass model should provide the mass m of the aircraft, the inertia matrix
[0021] The engine performance model is to establish the engine thrust T and throttle opening δ t , Mach number M and the nonlinear function relationship of flight height h.
[0022] The aircraft aerodynamic model is to es...
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The invention discloses an attack angle and sideslip angle estimation method for flight in atmospheric disturbance, and belongs to the technical field of calculation, calculation or counting. The attack angle and sideslip angle estimation method aims to precisely estimate an attack angle and a sideslip angle of an aircraft flying in atmospheric disturbance, and comprises the following steps of: acquiring estimation of low-frequency disturbance wind through using an optimization method according to aircraft modeling data and flight data; and establishing a flight state equation and a measurement equation, and precisely estimating the attack angle and the sideslip angle of the aircraft by combining a von Kalman atmospheric turbulence model and adopting an adaptive filtering method conformingto a maximum likelihood criterion.
Description
technical field [0001] The invention discloses a method for estimating the angle of attack and sideslip angle of flight in atmospheric disturbance, relates to the fields of civil aviation safety technology and flight data application, and in particular relates to a method for estimating the attack angle and sideslip angle of flight in atmospheric disturbance by using optimization algorithm and optimal estimation theory. The invention relates to a method for estimating angle and sideslip angle, which belongs to the technical field of calculation, calculation or counting. Background technique [0002] Atmospheric disturbances such as wind shear and atmospheric turbulence seriously affect the flight quality, ride quality and flight safety of civil aviation aircraft. The flight data recorder obtains the recording parameters from the air data system, inertial navigation system and other systems from the onboard bus, so that it can record the flight status, engine status, flight m...
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IPC IPC(8): G01P13/02
CPCG01P13/025
Inventor 高振兴
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS