Antenna/Camera Stabilization

MEMSIC's inertial systems are used in conjunction with a series of motors and gimbals for stabilization of satellite antenna and camera platforms in airborne, marine and land vehicle applications.

Antenna stabilization systems typically use the MEMSIC inertial sensor data (azimuth and elevation) to actively point the antenna at a desired satellite position in the sky. Our Products are excellent choices because they measure absolute roll, pitch, and azimuth.

Camera Stabilization systems require fine precision from an active stabilization system like the MEMSIC inertial systems to avoid errors caused by sensor noise, bias, or bandwidth/phase delay. Two common uses of inertial products are horizon leveling and jitter reduction. Horizon leveling is typical done on aerial cameras as they zoom in on a particular target on the ground or distance. A MEMSIC vertical gyro is strapped down to the aircraft and supplies roll and pitch data to the active gimbal. The gimbal uses the roll, pitch data and the gimbal's azimuth location relative to the aircraft in order to hold the camera at a constant angle relative to the horizon.

Jitter reduction is simply measuring the activity of the camera and applying corrective signals to the motors. An Inertial Measurement Unit that measures rate only is typically used since no absolute position information is required. In digital video applications, jitter can be removed without the use of motors but sophisticated signal processing and rate/accelerometer data from an IMU. Placing the sensor on the camera allows the controller to do closed loop control around a zero rate / null sensor reading. In other words the sensor is actually measuring the error signal for the controller.

MEMSIC products typically used in these applications include:

IMU800 and VG800 - high-performance low-noise MEMS-based inertial measurement unit and vertical gyro systems providing precise measurement of angular rate and roll/pitch angles in dynamic environments. The VG800 uses advanced MEMS sensors with performance equivalent to typical fiber optic (FOG) sensors, which results in superior performance, reliability, and stability over time.

NAV440 - standalone GPS-Aided MEMS-based attitude & heading reference system (AHRS).

VG350 - cost-effective low-profile MEMS-based vertical gyro for compact antenna systems.

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Antenna/Camera Stabilization
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