The optical inertial reference unit uses an inertial sensor group to detect the vibration of the controlled object in real time, and feedback controls the push-pull drive mechanism located in two orthogonal directions to achieve high-precision inertial stability of the reference beam on the platform. At the same time, it can also adjust the spatial position of the beam according to the off-target information of the precise tracking detector to achieve target tracking.

Structural composition of optical inertial reference units:

MEMS gyroscope: Used for low-frequency angular velocity measurement

Voice coil motor: Used to drive the countertop to rotate

Eddy current sensor: used for relative angular position measurement

Reference light source: Output reference beam

MHD Angular velocity sensor: Used for high-frequency angular velocity measurement

Flexible hinge: Two-degree-of-freedom rotation

Performance indicators

Disturbance measurement bandwidth: 0.1-1000 Hz

Angular resolution: 0.5 μrad

Maximum turning Angle range: ± 5mrad

Pointing accuracy: 1 μrad

Dynamic range: 0.1-100 Hz

Maximum disturbance suppression ratio: 40dB

Size: <5000 cm ³

Weight: 3.5 kg