Method for developing air data for use in flight control systems
First Claim
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1. A method for developing desired estimates of angle of attack and sideslip angle for controlling the flight of an aircraft, comprising the steps of:
- developing first estimates of angle of attack and sideslip angle relative to inertial space;
developing second estimates of angle of attack and sideslip angle based on aerodynamic force relationships; and
combining the first estimates and the second estimates for developing the desired estimates of angle of attack and sideslip angle and controlling the flight of the aircraft based on said desired estimates.
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Abstract
A method for developing desired air data for use in flight control systems is disclosed including determining angle of attack and sideslip angle relative to inertial space and also determining said angles by solving appropriate aerodynamic equations, whereby two independent estimates of the angles are provided. These estimates are combined for providing the desired data.
22 Citations
9 Claims
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1. A method for developing desired estimates of angle of attack and sideslip angle for controlling the flight of an aircraft, comprising the steps of:
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developing first estimates of angle of attack and sideslip angle relative to inertial space; developing second estimates of angle of attack and sideslip angle based on aerodynamic force relationships; and combining the first estimates and the second estimates for developing the desired estimates of angle of attack and sideslip angle and controlling the flight of the aircraft based on said desired estimates. - View Dependent Claims (2, 3, 4)
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5. A method for developing desired estimates of angle of attack and sideslip angle for controlling the flight of an aircraft, comprising the steps of:
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developing first estimates of angle of attack and sideslip angle relative to inertial space; developing second estimates of angle of attack and sideslip angle based on aerodynamic force relationships; and combining the first and second estimates for developing the desired estimates of angle of attack and sideslip angle and controlling the flight of the aircraft so that the desired estimates correspond to the first estimates at relatively high aircraft flight frequencies and correspond to the second estimates at relatively low aircraft flight frequencies. - View Dependent Claims (6, 7, 8)
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9. A method for developing desired estimates of angle of attack and sideslip angle for controlling the flight of an aircraft, comprising the steps of:
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developing first estimates of angle of attack and sideslip angle relative to inertial space; developing second estimates of angle of attack and sideslip angle based on aerodynamic force relationships; algebraically summing the desired estimates and the second estimates for providing summed estimates; applying a fixed gain to the summed estimates; filtering the summed estimates having the fixed gain applied thereto; adding the filtered, summed estimates having the fixed gain applied thereto to the first estimates for providing added estimates and controlling the flight of the aircraft based on said added estimates; said added estimates being the desired estimates; and said desired estimates corresponding to the first estimates at relatively high aircraft flight frequencies and corresponding to the second estimates at relatively low aircraft flight frequencies.
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Specification