Disturb Dual Rejection for Electro-optical Tracking Servo System

A disturb dual rejection circuit was generated base on disturb observer to improve the anti-disturb performance of a electronic optical tracking servo system on a shift carrier.The circuit structure,the circuit input and output relationship and the circuit output characteristic on servo saturation were analyzed.Applied in electronic optical tracking servo system,it improved the line of sight(LOS) stabilized precision.The LOS stabilized precision reached less than 0.02° in a disturb dual rejection circuit,which was one time higher than that of a disturb observer when the carrier moved at a maximum rate of 4°/s angular velocity with a 12 rad/s frequency sinusoidal.