A Method for Nonlinearity Compensation of the Stabilized Tracking System

Abstract:

The rapidity and tracking accuracy of the stabilized tracking system are mainly influenced by nonlinearity Currently, various methods has concentrated on nonlinear compensation such as optimal control and sliding mode variable structure. However, the optimal control method needs precise mathematical model, and sliding mode variable structure method leads to fluctuations of the output. Thus, this paper firstly builds a physical model of the tracking system, and then designs a differential ahead and disturbance observer (DOB) controller for stabilization loop, and a disturbance observer is used to compensate nonlinearity. A case study of a single-axis motion simulator is presented to validate the proposed method. The experiment result shows that the proposed method can obviously improve the stabilized tracking platforms performance in terms of accuracy and fast tracking ability.

• Periodical: Applied Mechanics and Materials (Volumes 427-429)
• Pages: 1705-1709
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.427-429.1705
• Online since: September 2013
• Authors: Hong Jie Hu*, Chao Zhang, Ye Wu, Xiong Jun Wu
• Keywords: DOB, Parameter, Stabilization Loop, Stabilized Tracking Platform

References

[1] Zhou Tao，in : Opto-Electronic Engineering, Vol. 40, No. 5(2013), p.6.

[2] Lei Po Liu Zhu Mu Fu in : International Journal of Automation and Computing 9(5), (2012), pp.487-491.

[3] Y BI, X LIU, W GE, J LI, in : Opto-electronic Engineering, vol. 31, no. 2(2004), pp.16-18.

[4] H LUO, D FAN, Z ZHANG, in : Acta Armamentarii, vol. 26, no. 3(2005), pp.426-428.

[5] Green M, Limebeer D J N. in : Prentice-Hall, (1994); pp.3-59.