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Drag control system for flying machine, process for estimating drag of flying machine, boundary layer control system, and boundary layer control process
Drag control system for flying machine, process for estimating drag of flying machine, boundary layer control system, and boundary layer control process
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机译：飞行器的阻力控制系统，飞行器的阻力估计过程，边界层控制系统和边界层控制过程
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摘要
The thrust T of an airplane is estimated by a thrust estimating device, and the motion state (the speed, the angular speed, the attitude angle and the elevation angle) of the airplane is detected by a motion state detecting device. Then, a drag estimating device estimates the drag D of the airplane, based on the thrust T and the motion state of the airplane. An operation-amount calculating device converges the steering angle into a target steering angle at which the drag of the airplane is minimized, by repeating the operation of varying the steering angle of a flap by a very small angle by an operating device, and further varying the steering angle by a very small angle, while monitoring the increase or decrease in drag resulting from such variation. Such a drag reducing control is carried out, while monitoring the actual drag and hence, is extremely effective, and also can exhibit an effectiveness, irrespective of the motion state of the airplane.
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