Gain adjustable intelligent tracking algorithm

Puts forward a Gain Adjustable Fast Intelligent Tracking (GAFIT) algorithm, and realize quick and accurate location of the goal, when the detection signal is weaker. According to the size, location and output signal of the goal in four quadrant detector, the linear probe interval is determined in the four quadrant detector. On this interval, a liner relation can be get between the spot position and the corresponding output signal. The target quick location is realized with this relation. On the other hand, the sum signal of the four quadrant detector is sampled in real-time, this sum is related to the sensor's signal strength, then the change rate of the signal strength can be get, using adaptive learning ways to get the change trend of signal strength, and realized dynamic adjustment of the signal gain, in order to improve the signal resolution ratio when signal is weak, the tracking accuracy can be improved with this way. The experimental data show that GAIFT algorithm can rapidly locate position in the linear interval and accurately track through the dynamic change signal gain for the weaker signal. tracking precision can be improved to 0.018 degrees.