A full-band disturbance decoupling method for photoelectric tracking system of motion platform

Abstract

The invention provides a full-frequency disturbance decoupling method for a motion platform photoelectric tracking system, which is mainly used for decoupling target motion information and disturbance information in tracking frame gyro signals, and estimating the remaining full-frequency disturbance information after rough stabilization. Angular rate gyros A and E are respectively installed on the azimuth axis and pitch axis of the tracking frame, and the frame velocity loop adopts the gyro feedback closed loop to form a rough stability, and the model of the whole coarse stability loop is recorded as the target angular velocity as the frame rough stability loop The input and the input of its model, the difference between the output of the two is multiplied by the low-pass filter to obtain the disturbed low-frequency part d 1 (s); Multiply the gyro measurement signal by a high-pass filter to obtain the disturbance high-frequency part d 2 (s); will d 1 (s) and d 2 The addition of (s) results in the full-band disturbance after rough stabilization suppression and does not contain target motion information. The invention does not need to add additional sensors, is simple and effective, and is easy to realize engineering.

Description

technical field [0001] The invention belongs to the field of inertial stability control, and in particular relates to a full-frequency disturbance decoupling method for a motion platform photoelectric tracking system. Background technique [0002] The boresight of the photoelectric system on the moving carrier will be affected by the disturbance of the carrier. Therefore, a stability control subsystem must be established to isolate the disturbance of the carrier so that the boresight of the system will not be affected by the disturbance. The commonly used inertial stability control scheme is to install an inertial rate sensor on the tracking frame, and the frame uses an inertial rate sensor to feedback a closed loop. However, due to the large inertia of the frame, the bandwidth of the frame speed stabilization loop is low, and the disturbance suppression capability is limited; and the high-precision inertial sensor is large in size, heavy in weight, and high in cost, which i...

AI Technical Summary

Problems solved by technology

Generally, the moving frequency of the target is low. A commonly used disturbance decoupling method is the high-pass filtering method. The advantage of this method is that it is simple, but it will lose the disturbance information of the low frequency part.

In addition, the use of disturbance observations for disturbance observation depends on the accuracy of the controlled object model. The higher the frequency, the less accurate the model is, and it is difficult to achieve broadband disturbance decoupling.

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