Ball screw type gas vane servo mechanism

Abstract

The invention discloses a thrust vector control ball screw type gas vane servo mechanism which is composed of a plurality of servo units, the servo units are arranged around the inner wall of a gas vane cabin, the output end of each servo unit extends out of the tail end face of the gas vane cabin and then is connected with a vane piece, and the output end of each servo unit is connected with a servo motor. The servo unit comprises a servo motor, a ball screw transmission mechanism, a fixing frame, a shifting fork mechanism, a rudder shaft and an angle sensor, the servo motor is connected with a ball screw through a coupler, the ball screw converts rotary motion into linear motion of a screw nut, and the screw nut is rigidly connected with the shifting fork mechanism through a sliding block to drive the rudder sheet mechanism to deflect. The system is compact in structure, small in size and high in precision and transmission stability, the deflection angle of the rudder sheet is monitored in real time through the angle sensor and fed back to the servo motor controller, closed-loop control over the gas rudder servo system can be achieved, the influence of interference on the deflection angle of the rudder sheet is reduced, and therefore the control precision of the system is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of steering gears, and particularly relates to a ball screw type gas-fired rudder servo mechanism. Background technique [0002] The gas rudder steering gear system is the key mechanism for the missile to realize the thrust vector control of the large angle of attack. Because the electric steering gear has the advantages of high reliability, easy use and maintenance, and low difficulty in manufacturing and installation, the existing gas rudder steering gear system usually Using electric steering gear. The mechanical structure design is one of the difficulties in the design of the electric steering gear. The deceleration transmission mechanism of the electric steering gear not only requires small friction, small clearance, small volume, but also has the characteristics of small deformation at high and low temperature. At present, the most used electric steering gear is the gear transmission mechanism. Althou...

AI Technical Summary

Problems solved by technology

At present, gear transmission mechanism is the most widely used electric steering gear. Although various gear mechanisms can realize arbitrary design of parameters and large transmission ratio, they generally have large gaps, large weight and volume, and many transmission links. There are many linear factors, which do not meet the overall structural requirements of small missiles

In addition, during the actual working process of the gas rudder, the rudder will be subject to a large hinge moment, which will cause great interference to the control of the rudder. Due to the limitation of space, there are few real-time monitoring devices for setting the angle of the rudder on the gas rudder. , which limits the control accuracy of the system

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