Mechanism to control the roll of the separated body model

Abstract

The invention provides a rolling attitude motion mechanism of a missile applied to a trajectory capture system, the main purpose of which is to realize the roll of a launch model around its own axis in a multi-body separation trajectory capture test in a wind tunnel. It includes a support rod, a joint, a sleeve, a drive control device and a tail cone. One end of the support rod is fastened to the front end of the joint in a manner concentric with the central axis, and the other end is used to install the balance and the separation body model. The joint can It is installed at the front opening of the sleeve in a freely rotating manner. The joint has a rear end shaft. When the joint is installed on the sleeve, the rear end shaft extends into the sleeve, and the drive mechanism is integrally installed on the sleeve. Inside, the drive shaft of the drive control device is fastened to the rear end shaft, so that the rear end shaft can be driven to drive the joint and the support rod to rotate, and the tail cone is blocked in the rear end opening of the sleeve . The mechanism has low clogging degree, high control precision, short control response time and high rigidity.

Description

technical field [0001] The invention relates to a mechanism for controlling the roll of a separated body model applied to a trajectory capturing system, and belongs to the field of experimental aerodynamics. Background technique [0002] The trajectory capture system is a wind tunnel test system that simulates the separation between aircraft stages in the wind tunnel test, and the mutual interference flow field between the separation body and the parent body when the aircraft bomb and external storage are separated. During the test, according to the installation in the separation body model The aerodynamic force measured by the balance is used to solve the flight mechanics equation to obtain the attitude and displacement of the separated body model in the next step. The computer inputs commands into the multi-degree-of-freedom motion mechanism, and each motion mechanism completes the position and posture of the separated body model according to the instructions. Change. [...

AI Technical Summary

Problems solved by technology

[0004] Considering space constraints and interference, most of the rolling motion mechanisms in the domestic trajectory capture system currently use the way of turning joints, and the rolling motion mechanism is installed at a position far from the model, thereby reducing the impact of the rolling motion mechanism on the tail of the model. Disturbance of the flow field (attached Figure 4 ), but in the rolling process of the rolling motor driving the turning joint, the model has displacements in other directions besides rolling, which needs to be compensated to make the model reach the real position, and the design displacement of the loss system limits the model itself. Range of movement with more error and increased work time

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