A Dynamic Angle-of-Attack Limiting Method for Reducing Projectile Overload When Shape Jumps

Abstract

The invention discloses a dynamic angle-of-attack limiting method for reducing the overload of a projectile body when the shape jumps, by dynamically limiting the attack angle of the missile, so as to reduce the overload of the projectile body when the aerodynamic shape jumps; wherein the attack angle of the missile is limited Carry out dynamic limiting, and the implementation method is as follows: S1. Calculate the maximum angle of attack amplitude of the missile in the steady state process before and after separation and the maximum angle of attack amplitude of the missile when the aerodynamic shape jumps, and the variation range of the missile's angle of attack and flight speed ; S2, determine the angle of attack limiting amplitude function that changes with the missile flight speed; S3, determine the functional relationship between the maximum lift coefficient, the angle of attack limiting amplitude, and the flight speed; S4, obtain the missile reference area, quality, and current moment The flight pressure, flight speed and ballistic inclination of the missile are used to determine the upper limit and lower limit of the overload limiter at the current moment. The implementation of the present invention can determine the optimal attack angle limiting amplitude value according to the real-time flight state of the missile, and reduce the overload of the missile body when the aerodynamic shape jumps.

Description

technical field [0001] The invention belongs to the technical field of missile flight control, and more specifically relates to a dynamic angle-of-attack limiting method for reducing the overload of a missile body when its shape jumps. Background technique [0002] The flight angle of attack of a missile is an important parameter that characterizes the flight state of the missile. Its magnitude, sign, and change rule of the sign play an important role in the flight state of the missile and the design of the control system. At present, in order to achieve a certain aerodynamic design index and provide a good controllable aircraft aerodynamic shape for the guidance and control profession, the purpose of changing the aerodynamic characteristics is usually achieved by changing the local structural shape of the aircraft near a specific state point. However, the jump of aerodynamic shape will bring about large separation interference (torque interference and force interference), w...

AI Technical Summary

Problems solved by technology

The traditional angle-of-attack limiter algorithm uses a fixed angle of attack to design the limiter with the maximum fixed angle of attack value. This method cannot suppress the large overload generated when the aerodynamic shape jumps, and cannot meet the requirements of the control system.

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