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A low-stiffness actuator and a position servo system on the projectile

An actuator and low-stiffness technology, which is applied in the direction of self-propelled bombs, offensive equipment, projectiles, etc., can solve problems such as low stiffness, achieve fast and accurate response, and improve the effect of bending mode

Active Publication Date: 2019-02-22
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned analysis, the present invention aims to provide a low-stiffness actuator and a position servo system on the projectile, which solves the problems of the actuator in the prior art on the premise of ensuring fast and accurate response and sufficient structural strength and load capacity. If the stiffness is too high, the torsional frequency of the actuator is likely to couple with other frequencies of the projectile or the bending frequency of the servo system, resulting in the problem of destructive aerodynamic flutter that does not attenuate the amplitude of the servo system

Method used

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  • A low-stiffness actuator and a position servo system on the projectile
  • A low-stiffness actuator and a position servo system on the projectile

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Experimental program
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Effect test

Embodiment 1

[0027] This embodiment provides a low-stiffness actuator, see Figure 1 to Figure 2 , which includes a shift fork 1, a motor 2, a screw shaft 3 connected to the output shaft of the motor 2, a screw nut 4 fitted on the screw shaft 3, and a support sleeve 5 affixed to the screw nut 4. Wherein, the support sleeve 5 is located in the fork foot 101 of the shift fork 1, and the fork foot 101 is in sliding contact with the support sleeve 5 through the fork foot elastic layer 6 and the fork foot metal layer 7; 8 with contact.

[0028] During implementation, the output shaft of the motor 2 drives the screw shaft 3 to rotate, and the screw shaft 3 cooperates with the screw nut 4 to convert the rotational motion of the screw shaft 3 into the rotation of the screw nut 4 and the support sleeve 5 along the screw shaft 3. The horizontal movement in the direction of the axis makes the support sleeve 5 push the shift fork 1 to rotate, thereby driving the rudder blade 8 to deflect.

[0029] C...

Embodiment 2

[0042] This embodiment provides an missile-up position servo system, which includes the low-stiffness actuator in Embodiment 1.

[0043] Compared with the prior art, the beneficial effects of the spring-up position servo system provided by this embodiment are the same as those of the low-stiffness actuator in Embodiment 1, and will not be repeated here.

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Abstract

The invention relates to a low-rigidity performing device and a position servo system, and belongs to the technical field of performing devices. On the premise of guaranteeing rapid and accurate response as well as enough structural strength and enough load capacity, the problem that destructive pneumatic flutter with un-attenuated amplitude of vibration of the servo system is generated as a performing device in the prior art is too high in rigidity, and torsion frequency of the performing device is easily coupled with other frequency of an elastic body or bending frequency of the servo system is solved. The low-rigidity performing device comprises a shifting fork, a motor, a lead screw shaft which is connected with an output shaft of the motor and a lead screw nut which is nested with the lead screw shaft, and further comprises a supporting sleeve which is fixedly connected with the lead screw nut, wherein the supporting sleeve is positioned in a fork leg of the shifting fork; the fork leg is in sliding contact with the supporting sleeve through a fork leg elastic layer and a fork leg metal layer; and in use, the shaft sleeve of the shifting fork is fixedly in contact with a rudder wing. The low-rigidity performing device provided by the invention can be used for position transmission of the bounce-up position servo system.

Description

technical field [0001] The invention relates to an actuator, in particular to a low-stiffness actuator and a servo system for the position of the bullet. Background technique [0002] Actuating devices (for example, cylindrical gears, ball screws, planetary gears, worm gears, and harmonic reduction gears, etc.) are important components of the position servo system (hereinafter referred to as the servo system) on the projectile. The position signal is output, and the transmission mechanism is driven by the servo motor to respond to the position signal. [0003] In the servo system, not only the actuator needs to respond to the position signal quickly and accurately, but also should have sufficient structural strength, load capacity and high power-to-mass ratio. Therefore, in order to meet the requirements of structural strength and load capacity, the rigidity of the usual actuators is relatively high, so that the actuators are generally in an unadjustable state. [0004] Ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42B15/00F42B10/04
CPCF42B10/04F42B15/00
Inventor 杨中巍蔡霖郭威吴樊唐旭东尹骏
Owner BEIJING MECHANICAL EQUIP INST