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Photoelectric system visual axis stabilization method based on carrier attitude angle information feedforward

A technology of an optoelectronic system and a stabilization method, which is applied in the direction of control using feedback, and can solve the problems of inability to suppress the disturbance of the viewing axis and the inability to measure the angular vibration of the rolling axis.

Active Publication Date: 2019-03-08
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

For the horizontal photoelectric system, the azimuth axis gyro cannot measure the angular vibration of the rolling axis due to the orthogonal relationship, so it cannot suppress its disturbance to the visual axis

Method used

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  • Photoelectric system visual axis stabilization method based on carrier attitude angle information feedforward
  • Photoelectric system visual axis stabilization method based on carrier attitude angle information feedforward
  • Photoelectric system visual axis stabilization method based on carrier attitude angle information feedforward

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Embodiment Construction

[0069] Examples of the present invention are described below. But following embodiment only limits to explain the present invention, and protection scope of the present invention should comprise the whole content of claim, and promptly can realize the whole content of claim of the present invention to those skilled in the art through following embodiment.

[0070] A certain type of ground-level photoelectric tracking system placed on a moving platform is attached figure 1 As shown, the system consists of three parts: base, azimuth axis, and pitch axis. The base is connected to the motion platform through a vibration isolation device, but the attitude angle vibration of the platform will still be transmitted to the base, thereby affecting the stability of the visual axis. The three-axis attitude angle fluctuations are Δθ pitch =0.1°, Δθ roll =0.1°, Δθ yaw = 0.1°. Current pitch angle θ E =45°, the current azimuth angle θ A = 0°.

[0071] According to the method that the ...

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Abstract

The invention discloses a photoelectric system visual axis stabilization method based on carrier attitude angle information feedforward. The visual axis stabilization problem of a horizontal photoelectric system installed on a moving carrier when the carrier has three-axis attitude angle vibration is solved. For a traditional moving carrier photoelectric system, the method for stabilizing a visualaxis is to install angular rate gyros on frame pitch and azimuth axes, and the orientation of the pitch and azimuth axes of the frame is stabilized through a closed loop. The vibration of the movingcarrier is usually distributed in the three axial directions of pitch, azimuth and rolling, and the azimuth axis gyro can not measure the angular vibration of a rolling axis due to an orthogonal relationship so that a disturbance to a visual axis can not be restrained. In the invention, the azimuth and pitch axis angular velocity closed loops of an original photoelectric system are canceled, encoders are installed on the azimuth and pitch axes to form an angular position closed loop; and an inertial attitude measuring unit is installed on the substrate of the photoelectric system, and the disturbance quantity of the carrier to the visual axis is fed forward to the angular position closed-loop controllers of the azimuth and pitch axes so as to achieve the stability of the visual axis.

Description

technical field [0001] The invention belongs to the field of photoelectric system tracking control, and particularly relates to a method for stabilizing the visual axis of a photoelectric system based on carrier attitude angle information feedforward, which is to suppress the roll angle of the carrier through the carrier attitude angle information feedforward of the ground-level photoelectric system installed on the moving carrier Vibration disturbs the visual axis and stabilizes the visual axis. Background technique [0002] The stability of the boresight is an important condition for the normal operation of the photoelectric system. The photoelectric system installed on the moving carrier (vehicle, ship, aircraft, satellite) will be disturbed by the vibration of the carrier's attitude angle, which will affect the stability of the visual axis. For the ground-level photoelectric tracking system, the current traditional method of stabilizing the boresight is to install an an...

Claims

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Application Information

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IPC IPC(8): G05D3/12
CPCG05D3/12
Inventor 毛耀张超于伟李志俊刘琼扈宏毅
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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