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CN-122018143-A - Reaction disturbance self-compensating quick reflector driven by voice coil motor

CN122018143ACN 122018143 ACN122018143 ACN 122018143ACN-122018143-A

Abstract

The invention belongs to the technical field of quick reflectors, and discloses a voice coil motor driven reaction disturbance self-compensating quick reflector, wherein the position of a virtual rotating shaft can be flexibly changed by adjusting the included angle between reeds on a reed group. Compared with the traditional compliant mechanism, the virtual rotating shaft of the compliant mechanism is limited by the mechanism, can cover the theoretical working position, can be flexibly configured according to the load characteristic, greatly improves the design freedom degree, drives the compensation block to move while driving the reflector to deflect through the interaction force between the coil of the voice coil motor and the magnetic seat, realizes the compensation of the reaction force born by the base by the reverse dynamic compensation force generated by the deflection of the compensation block, replaces an actuator adopting mirror image arrangement in the traditional scheme, and has the advantages of more integration, more direct response, lower control cost and smaller overall quality compared with the traditional scheme.

Inventors

  • LV TAO
  • Wei Yuchu
  • HAO WEI
  • RUAN PING

Assignees

  • 中国科学院西安光学精密机械研究所

Dates

Publication Date
20260512
Application Date
20260410

Claims (10)

  1. 1. The utility model provides a voice coil motor driven reaction disturbance self-compensating quick reflector, its characterized in that, including compensation piece (9), flexible festival (8) down are installed to compensation piece (9) top central point put, flexible festival (8) top down is installed base (7), flexible festival (4) are installed to base (7) top central point put, go up flexible festival (4) and flexible festival (8) down and be the hollow cylinder of bottom area connection otic placode, and go up flexible festival (4) and flexible festival (8) coaxial line down, install mirror base (3) in flexible festival (4) top central point put, install speculum (2) on mirror base (3), four voice coil motor (5) are evenly set up in base (7) circumference, voice coil motor (5) include coil (5 a) and magnetic base (5 b), coil (5 a) and mirror base (3) rigid coupling, magnetic base (5 b) and compensation piece (9) rigid coupling, electric current sensor (6) are still installed at base (7) top, four recess window (8) are evenly set up along the centre of circumference of stretching down along rectangular window (4), four recess window (4) are evenly set up along the centre-to the circumference of following the rectangle and are hollow out.
  2. 2. The voice coil motor driven reaction disturbance self-compensating quick reflector according to claim 1, wherein each reed group (11) comprises two inclined reeds extending radially, the two reeds are symmetrical about a plane formed by the hollowed-out center of the hollowed-out window and the cylindrical axis of the upper flexible joint (4), the radially inner end face and the radially outer end face of each reed are integrally connected with the inner surface and the outer surface of the upper flexible joint (4) respectively, the two side faces of each reed are separated from the side wall of the rectangular hollowed-out window, and the thicknesses, the lengths and the widths of the reeds are the same.
  3. 3. The self-compensating rapid reflecting mirror for reaction disturbance driven by a voice coil motor according to claim 2, wherein the reflecting mirror (2), the mirror base (3) and the coil (5 a) form an upper load, the reeds of the two opposite reed groups (11) on the upper flexible joint (4) respectively intersect at a point on the extension line of the length direction of the reeds, the connection line of the two points is a virtual rotation axis of the upper flexible joint (4), the two virtual axes formed by the two virtual rotation axes are mutually orthogonal and coplanar, a virtual rotation plane is determined by the two virtual rotation axes, and the center of mass of the upper load is positioned in the virtual rotation plane.
  4. 4. A voice coil motor driven reaction disturbance self-compensating fast mirror according to claim 3, characterized in that the compensation block (9) and the magnetic base (5 b) form a lower load, the moment of inertia of the lower load is equal to that of the upper load, the configuration of the lower flexible joint (8) is the same as that of the upper flexible joint (4), the reed group (11) of the lower flexible joint (8) and the reed group (11) of the upper flexible joint (4) are reversely arranged, the reeds on the two opposite reed groups (11) on the lower flexible joint (8) respectively intersect at one point on the extension line of the length direction of the reed group, the connecting line of the two points is one virtual rotation axis of the lower flexible joint (8), the two virtual axes formed by the two virtual rotation axes are orthogonal to each other and coplanar, the virtual rotation plane formed by the two virtual rotation axes of the lower flexible joint (8) is far away from the center of mass of the lower load, and the two virtual rotation axes of the upper flexible joint (4) and the two virtual rotation axes of the lower flexible joint (8) are completely coincident in the top view direction.
  5. 5. A voice coil motor driven reactive disturbance self-compensating fast mirror according to claim 2, characterized in that the centre line of the oppositely arranged voice coil motor (5) coincides with the virtual rotation axis in top view.
  6. 6. A voice coil motor driven reactive disturbance self compensating fast mirror according to claim 5, characterized in that the opposite direction of movement of the oppositely arranged voice coil motor (5) is opposite.
  7. 7. A voice coil motor driven reactive disturbance self compensating fast mirror according to claim 1, characterized in that the rotational stiffness of the lower flex (8) and the rotational stiffness of the upper flex (4) are the same.
  8. 8. The voice coil motor driven reaction disturbance self-compensating rapid reflecting mirror according to claim 1, wherein a boss is arranged on the upper surface of the mirror base (3) and is adhered to the reflecting mirror (2), and a coil positioning groove, an upper flexible joint (4) positioning groove and an upper flexible joint (4) positioning pin hole are respectively arranged on the lower surface of the mirror base (3) and are respectively used for radial positioning of a coil (5 a), radial positioning of the upper flexible joint (4) and circumferential positioning of the upper flexible joint (4).
  9. 9. A voice coil motor driven reactive disturbance self compensating fast mirror according to claim 1, characterized in that the eddy current sensor (6) comprises a first eddy current sensor (6-1) and a second eddy current sensor (6-2), the first eddy current sensor (6-1) and the second eddy current sensor (6-2) being located on the middle vertical line of two adjacent voice coil motors (5) in the top view direction, respectively, the first eddy current sensor (6-1) and the second eddy current sensor (6-2) being arranged on both sides of the same voice coil motor (5).
  10. 10. The voice coil motor-driven reaction disturbance self-compensating rapid reflecting mirror according to claim 1, wherein an upper housing (1) is fixedly mounted on the top of the base (7), the upper housing (1) wraps the top part of the base (7), a round hole is formed in the top of the upper housing (1), the round hole exposes the reflecting mirror (2), a lower housing (10) is fixedly mounted on the bottom of the base (7), and the lower housing (10) wraps the bottom part of the base (7).

Description

Reaction disturbance self-compensating quick reflector driven by voice coil motor Technical Field The invention belongs to the technical field of quick reflectors, and particularly relates to a reaction disturbance self-compensating quick reflector driven by a voice coil motor. Background The field of space safety and scientific exploration has core requirements on large caliber, high resolution and high precision pointing of an optical system, but in the practical application process, external disturbance and reaction force generated by the movement of an internal actuator can be coupled to an optical system base, so that visual axis shake is caused, and the pointing precision of the optical system is reduced, and the imaging quality is damaged. There are different ways of dealing with the problem of dynamic reaction forces to the base when the actuator drives the fast mirror. The traditional small-sized quick reflector has weak reaction force borne by the base due to smaller driving force, has no obvious influence on the pointing precision of the system, and usually does not adopt compensation measures. The large-caliber quick reflector is generally provided with the same actuator in a mirror image mode on the back of the base, and the compensation of the reaction force born by the base is realized by driving the compensation block to reversely deflect, so that the generation of system pointing errors is reduced. The actuator reaction force compensation scheme adopted by the current large-caliber quick reflector cannot effectively consider practicality and economy, has obvious technical defects, and cannot effectively solve the adverse effects of the actuator reaction force on a quick reflector system and other optical systems on the premise of not increasing additional burden. The large-caliber quick reflector adopts a mirror image installation actuator to drive a compensation scheme of the compensation block to reversely deflect, and although the influence of the reaction force of the actuator on a system base can be reduced to a certain extent, parts such as the actuator and the compensation block are additionally added, so that the quality of the whole machine is greatly increased, and meanwhile, the control difficulty and the manufacturing cost of the equipment are improved, so that the lightweight design and the large-scale application of the equipment are not facilitated. Disclosure of Invention The invention provides a voice coil motor driven reaction disturbance self-compensating quick reflector, which solves the problems of complex control, high hardware cost and rapid increase of system quality faced by the traditional large-caliber quick reflector in the process of compensating the reaction force of an actuator to a base. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a voice coil motor driven reaction disturbance self-compensating quick reflector, includes the compensation piece, the flexible festival down is installed to compensation piece top central point put, the base is installed at flexible festival top down, the flexible festival is installed to base top central point put, go up flexible festival and flexible festival down and be the hollow cylinder of bottom area connection otic placode, and go up flexible festival and flexible festival coaxial line down, go up flexible festival top central point put and install the mirror seat, install the speculum on the mirror seat, four voice coil motor is evenly set up in base circumference, voice coil motor includes coil and magnet holder, coil and mirror seat rigid coupling, magnet holder and compensation piece rigid coupling, eddy current transducer is still installed at the base top, go up flexible festival and flexible festival's axial central point put down and evenly offered four same rectangle fretwork windows along the circumferencial direction, two relative rectangle fretwork windows link to each through the run through fretwork area that extends in succession along the circumferencial direction be provided with reed group in the rectangle fretwork window. Preferably, each reed group comprises two inclined reeds extending radially, the two reeds are symmetrical about a plane formed by the hollowed-out center of the hollowed-out window and the cylindrical axis of the upper flexible joint, the radially inner end face and the radially outer end face of each reed are integrally connected with the inner surface and the outer surface of the upper flexible joint respectively, the two side faces of each reed are separated from the side wall of the rectangular hollowed-out window, and the thickness, the length and the width of each reed are the same. Preferably, the reflecting mirror, the mirror base and the coil form an upper load, the reeds on the two opposite reed groups on the upper flexible joint respectively intersect at one point on the extension line of