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Study on Stabilizaton Control Technique of High Resolution Camera in Airborone Pod for Earth

Author: ZengQi
Tutor: ZhangLiZhong
School: Changchun University of Science and Technology
Course: Mechanical and Electronic Engineering
Keywords: Airborne Pods Stability control Servo drive AOALINE
CLC: V225
Type: Master's thesis
Year: 2011
Downloads: 136
Quote: 1
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Abstract


Airborne pod to stabilize the visual axis of the optical system , the optical system can be stably airborne observation target environment . Airborne pods in military and civilian aspects of a wide range of applications . This paper focuses on the visual axis stabilization technology , including passive damping and inertial stabilization technology . The method is passive damping airborne pod installed between the inner and outer damper , by isolation damper coupled aircraft carrier frequency vibration . Inertial stabilization technology is a closed loop servo control of the servo system is a DC torque motor actuators , sensors are inertial gyroscope . This paper also designed a built-in bipolar current loop DC torque motor drive circuit and the main controller parts to TMS320LF2407A control circuit . Inertial stabilization technology is mainly low-frequency vibration isolation . In order to improve the system bandwidth , the design uses three-loop control strategy , namely, current loop, velocity loop stability , position loop . Current loop built into the drive circuit, with a steady velocity loop PID -type ADALINE network controllers, compared with the classical PID has an obvious advantage . The last part of thesis presents stability and accuracy testing method, the airborne pod is mounted on the vibration table , shaking table to simulate the vibration of the helicopter power spectrum , and then measure the stability of the system accuracy. From the experimental results analysis, the system stability and accuracy in 30μrad less , in line with the indicator ; from real shot pictures look better image display , meet the actual application requirements.

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CLC: > Aviation, aerospace > Aviation > Aircraft Construction and Design > Stability and control surfaces
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