Normal stress electromagnetic type two-dimensional deflection adjusting device and method with embedded strain sensor

Abstract

The invention discloses a normal stress electromagnetic type two-dimensional deflection adjusting device and method with an embedded strain sensor. The device comprises a base, four driving modules which are orthogonally arranged on the base, a cross-shaped mirror support which is embedded in the four driving modules, a flexible hinge which is arranged between the center of the base and the center of the cross-shaped mirror support, and four sensing units which are arranged below the cross-shaped mirror support and mounted on the base in a swastika shape. When the adjusting device is in an initial state, the mirror support is in a balanced state, and when current is applied to excitation coils on a pair of driving modules on a Y axis or an X axis, the pair of driving modules generates a pair of differential forces on the cross-shaped mirror support, so that the cross-shaped mirror support deflects around the X axis or the Y axis, and meanwhile, a pair of sensing units arranged on the Y axis or the X axis generates strain sensing signals for closed-loop feedback control. According to the adjusting device, driving and sensing are integrally designed, the device is compact in structure, has the advantages of being large in deflection range and high in working bandwidth, and can achieve high-precision two-dimensional deflection actuation of the load.

Description

Technical field [0001] The present invention belongs to the field of micro-angle displacement two-dimensional deflection operation, and specifically, the positive stress electromagnetic two-dimensional deflective modulation device and the adjustment method are related to the inline strain sensing. [0002] technical background [0003] With the rapid development of space engineering, the micro-angle 2D fast deflection adjustment device has been widely used in astronomical telescope, image stability control, spacecraft communication precise pointing and satellite imaging, etc., and plays an increasingly important role. [0004] The piezoelectric drive type micro-angled active platform has high drive voltage, small actuation stroke, fragile piezoelectric ceramic, and is susceptible to damage to the vibration and impact environment generated in the aerospace launch phase. [0005] The electromagnetic two-dimensional active platform with a voice coil motor is a small driving force, lo...

AI Technical Summary

Problems solved by technology

[0004] Piezoelectric-driven micro-angle actuating platforms have disadvantages such as high driving voltage, small actuating stroke, fragile piezoelectric ceramics, and easy damage in the vibration and shock environment generated during the launch stage of space rockets.

[0005] The electromagnetic two-dimensional actuation platform with the voice coil motor as the actuator has the disadvantages of small driving force, low actuation bandwidth, and difficulty in dissipating heat in space applications.

[0006] Traditional electromagnetic two-dimensional deflection adjustment platforms often need to install additional devices such as eddy current displacement sensors to measure the dual-axis deflection angle, resulting in large actuator size and high power consumption.

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