A drop evaluation method for towed bait bombs

Abstract

The invention discloses a towed decoy drop height assessment method. The method comprises the following steps: (1) designing a processing decoy force-measuring model to perform wind tunnel force-measuring test according to a geometric similarity rule, acquiring a lift coefficient CL, resistance coefficient CD and a pitch moment coefficient CMZ relative to a decoy towing point of the decoy model along attack angle change under flight Mach number; (2) fitting through polynomial to obtain a function relation formula about the attack angle a: CL=CL(a), CD=CD(a), and CMZ=CMZ(a); and (3) acquiring an included angle phi between a towing line and a horizontal plane under a real towing state by solving a force and moment balancing relation formula under the decoy stable towing state, wherein the drop height H is equal to L*sin(phi) when knowing the length L of the towing line. The defects of the existing theoretic analysis and the flight test method are overcome, the realizability is strong, the cost is low, and the precision is high.

Description

technical field [0001] The invention relates to a drop evaluation method of a towed bait bomb, which is used for accurately evaluating the drop when the towed bait bomb is in stable flight after being dropped. Background technique [0002] The towed decoy bomb is usually composed of three parts: aircraft (cruising bomb)-towing line-bomb body. The specific implementation method is that the carrier aircraft releases the decoy bomb through the belly compartment and drags the decoy bomb through the towing line. The decoy bomb is equipped with amplifying Transponders and passive reflector decoys guide the attacking missiles to the decoy bombs and stay away from the carrier aircraft. When the missiles are not attacked, the decoy bombs are hidden inside the belly compartment of the carrier aircraft, which does not affect the flight maneuverability of the carrier aircraft. After the danger has passed, the towed decoy shells that were not hit can be recovered and reused on the aircra...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a drop evaluation method for towed bait bombs, which can accurately obtain the drop when the towed bait bombs are in flight and overcomes the existing theoretical analysis. The defects of large method error and high cost of flight test method are strong in realizability, low in cost and high in accuracy

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