A Compact, High Precision Position Sensing Embedded System for Fast Steering Mirror

A fast steering tip-tilt mirror is widely used as a pointing and tracking device in aerospace engineering, in laser beam stabilizers and in many other applications. A fast steering mirror has the capability to project light in two-dimensional space. The correct positioning of the mirror is crucial for the device overall operation. In this project a complete feedback control system is deployed to ensure the correct positioning of the tip-tilt mirror. A novice approach is used in the implementation of feedback position sensor, ensuring high performance and low cost. A robust phase sensitive detection technique is used for signal processing. A compact design of embedded system is implemented, facilitating fast analog to digital conversion (ADC), good processing power (32 bit processor at 64 MHz) and fast (2 Msps) two channels digital to analog conversion (DAC). Finally, a PID algorithm is used to perform feedback control calculations ensuring correct positioning of the tip-tilt mirror.Embedded SystemComputer EngineeringElectrical Engineering, Mathematics and Computer Scienc