Mode-free coupled two-axis deflection flexible support structure
A flexible support and modeless technology, applied in installation, optics, instruments, etc., can solve problems such as large structural size, increased system bandwidth, and restricted system accuracy, and achieve simple structure, convenient installation, and high deflection accuracy.
Inactive Publication Date: 2008-05-28
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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[0005] Therefore, it can be said that the flexible support plays a decisive role in the high-precision, high-bandwidth system, and the coupling between the high-order vibration mode and the low-order vibration mode in the unreasonable structure of the flexible support makes the designed structure produce Resonance and anti-resonance are separated, resulting in the dynamic characteristics of the structural object being too complex, so that the control system becomes more complex, and, due to the uncertainty of the coupling, the change of the coupling degree with the vibration environment will lead to the change of the dynamic characteristics of the object. Changes make the control system unstable, which restricts the improvement of system accuracy and limits the increase of system bandwidth
[0006] Although there are many two-axis deflection flexible support structures currently used at home and abroad, and there are also many two-axis deflection flexible support structures used in high-precision, high-bandwidth systems, these flexible support structures have certain advantages in one or some other The support stiffness in the direction is low, the coupling between the high-order vibration mode and the low-order vibration mode, and the problem of large structure size
At present, there are no reports of this kind of non-mode coupling two-axis deflection flexible support structure at home and abroad.
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[0026] As shown in Figures 6 and 7, the present invention is composed of four trapezoidal flexible boards 1, flexible rods 2, four fixing frames 3, deflection blocks 4, a bottom plate 5, and a motor 6. The four trapezoidal flexible boards 1 are respectively fixed on the four fixing frames 3, the fixing frames 3 are rigidly fixed on the base plate 5, the base plate 5 is fixed on the platform, the stator of the motor 6 is installed on the base plate 5, and the mover is installed on the deflection block 4. The mover exerts force on the deflection block 4 to realize the deflection of the deflection block. The structural dimensions of the trapezoidal flexible board 1: the thickness is 0.2-0.6mm, the short side width of the trapezoidal board is about 4mm, the long side width is about 36mm, and the height is about 40mm. Such four flexible boards 1 are respectively installed in the tangential direction on the side of the deflection block 4, which provides the deflection block 4 with h...
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The invention discloses a non-model coupling double-axial deflecting flexible supporting frame, which comprises flexible plates, a flexible level, a deflecting block, a motor, and a fixing plate. Three or four flexible plates are respectively distributed and fixed evenly on a fixing frame along a tangent line direction of a deflecting block rotary shaft, the flexible level is fixed on the fixing frame along an axial direction of the deflecting block, and the motor is connected with the deflecting block. The invention designs a high high-order mode, which overcomes a mode coupling between a high-order and a low-order. The invention has simple and compact structure, convenient installment, and high deflecting accuracy.
Description
technical field [0001] The invention relates to a precision tracking instrument in photoelectric systems such as earth observation, astronomical telescope, vehicle, laser communication and photoelectric tracking equipment, as well as a high-precision, high-bandwidth instrument in precision instruments such as nano-scale machine tools and power tuning gyroscopes. Angular displacement controller. Background technique [0002] In the interferometric imaging of astronomical telescopes, in order to suppress the jitter of star light in a wide frequency range caused by atmospheric turbulence, in the laser communication system, in order to ensure the accuracy of long-distance transmission (hundreds of kilometers), mobile tracking equipment In order to suppress the high-frequency and large-scale jitter caused by aircraft, ships, rockets and other vehicles, it is necessary to use real-time measurement and real-time control of the two direction angle errors of the system. In order to ...
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IPC IPC(8): G02B7/00G05D3/00
Inventor 彭起陈洪斌王继红任戈
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI