TRACKING SYSTEM Russian patent published in 1997 - IPC

FIELD: functional elements of automatic control systems. SUBSTANCE: the known device using a series-connected photodetector and a deviation computing unit (DCU1), as well as series - connected digital-to-analog converter (DIA1), analog power amplifier (PA1), servomotor (SM), mechanical transmission (MT1) and rotary mirror (object of control), is supplemented with a telescope angular displacement control circuit consisting of series-connected additional photodetector (APD), DCU2, second switch, D/A2, PA2, SM2, MT2 of the spacecraft and telescope (object of control), series-connected attitude sensor (AS), subtracting device (SD) and the first switch, as well as a semitransparent plate and a threshold device, the semitransparent plate is installed in the telescope optical system axis at an angle of 45 degrees to it so that part of stellar radiation is reflected onto the additional photodetector, and the other passes onto the rotary mirror also installed in the telescope optical axis, and then onto the photodetector; the output of servomotor (SM1) is electrically connected to the input of the attitude sensor (AS), the second input of the subtracting device (SD) is connected to the output of switch 2, the output of DCUI is connected to the output of the threshold device and second input of switch 2, the output of the subtracting device is connected to the second input of switch 1, the first inputs of the switches are connected to the outputs of DCUI and DCU2, the switch outputs are connected to the inputs of D/A1 and D/A2, and the threshold device output signal controls operation of the switches. EFFECT: enhanced speed of response of the tracking system due to turning of its optical axis in the direction of misalignment between it and sighting line. 2 dwg