According to characteristics and demand of fine tracking spot detection in space laser communication system, a kind of real-time spot detection instrument was brought forward by adjusting gain automatically , which can overcome saturation photic intensity effect.

Design of photoelectrical encoder position detection system based on FPGA;

High resolution digital velocity detection and dynamic position detection methods;

Sensorless rotor position detection of SRM based on voltage pulses to two phases;

Design of position detecting control circuit based on encoder sensor;