Application of Improved Disturbance Observer in Stabilized Platform Servo System

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (8) : 96-99.

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Application of Improved Disturbance Observer in Stabilized Platform Servo System

LU Jian-shan，WANG Chang-ming，HE Yun-feng，HU Wei-wei

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Abstract

In order to improve the disturbance suppression performance of stabilized platform servo system, a new improved disturbance observer is used in platform system. Based on the structure of classical disturbance observer (DOB), an additional controller is applied in improved DOB to compensate system outputs. The performance of improved DOB is analyzed detailedly, and the robust stability when existing model perturbation is derived. Besides these, some design principles of the lowpass filter is given out. Numerical simulation results illustrate that the improved DOB can suppress external disturbances and model perturbation well, and the suppression performance of measurement noise is improved, too.

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stabilized platform / disturbance observer / lowpass filter / friction model

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LU Jian-shan;WANG Chang-ming;HE Yun-feng;HU Wei-wei. Application of Improved Disturbance Observer in Stabilized Platform Servo System[J]. Journal of Vibration and Shock, 2013, 32(8): 96-99