Bulletin of Surveying and Mapping ›› 2019, Vol. 0 ›› Issue (11): 64-68,108.doi: 10.13474/j.cnki.11-2246.2019.0353

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Control method of stable platform for aerial photogrammetry system of low altitude unmanned airship

YANG Ying1, LIU Fengzhu2, ZHAI Xi1   

  1. 1. National Geomatics Center of China, Beijing 100830, China;
    2. Beijing Institute of Surveying and Mapping, Beijing 100038, China
  • Received:2019-05-31 Revised:2019-09-16 Published:2019-12-02

Abstract: In this paper, a three-axis stabilized platform control method based on small and light-sized low-precision GNSS/IMU system and PID algorithm is proposed to solve the attitude stabilization problem of low altitude unmanned airship aerial remote sensing system. The system combines dual GPS light and small combination GNSS/IMU system, adopts separate camera and GNSS/IMU system control mode, adopts PID control method, uses STM32 control chip circuit to realize stable platform control. The stability of the system is verified by flight test, and the experimental results also show that the method can effectively isolate the influence of the instability of the unmanned airship attitude on the imaging system and effectively improve the imaging quality, which is of great significance for improving the accuracy of the unmanned airship aerial survey system.

Key words: unmanned airship, three-axis stable platform, PID control, low altitude aerial photography, composed wide-angle camera

CLC Number: