A calculation method of aerodynamic rudder deflection range based on rudder control roll strategy

Abstract

The invention relates to a pneumatic rudder deflection range calculation method based on a direction rudder roll control strategy. The method comprises the steps that a limit deflection set is confirmed according center of mass position deflection of an aircraft, pneumatic torque coefficient deflection and attack angle deflection value range; then roll force coefficient, yaw force coefficient, pitching force coefficient and pneumatic torque coefficient relative to nominal center of mass and function expressions for mach number, an attack angle, a sideslip angle, elevating rudder deflection, aileron rudder deflection and direction rudder deflection are confirmed in the set; and a function relation expression of roll force coefficient relative to practical center of mass and the mach number, the attack angle, the sideslip angle, elevating rudder deflection, aileron rudder deflection and direction rudder deflection is calculated via the deflection values and the function expressions, an equation set is established and solved and rudder deflection and the sideslip angle are obtained under the condition of zero aileron rudder deflection and the set mach number and the attack angle, and value range of rudder deflection is confirmed according to the solution. Rudder deflection range of the aircraft based on the direction rudder roll control strategy can be accurately confirmed, and calculation error is small.

Description

technical field [0001] The invention relates to the technical field of aircraft guidance and control, in particular to an aerodynamic rudder deflection range calculation method based on a rudder control roll strategy. Background technique [0002] There are usually two ways to control the roll attitude of a plane-symmetric aircraft that relies on aerodynamic rudders for flight control in the atmosphere: aileron-controlled roll and rudder-controlled roll. Aileron-controlled roll is a control method that relies on the rolling moment generated by the aileron differential to directly perform roll control. Rudder-controlled roll uses the rudder to control the direction and size of the side slip, and then uses the roll torque generated by the side slip to perform roll control. Turn the control method of manipulation. [0003] Regardless of the aircraft controlled by the aileron or the aircraft controlled by the rudder, it is necessary to calculate the aerodynamic rudder that is s...

AI Technical Summary

Problems solved by technology

For the aircraft with the rudder control roll strategy, in the case of center of mass, aerodynamic and other parameter deviations, the results obtained by the above method are very different from those of the closed-loop control rudder deviation, and are no longer applicable.

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