Open-Loop Frequency Domain Analysis Based on System Identification

Abstract:

In this paper, an open-loop frequency domain analysis based on system identification is introduced. Using model identification tools in Matlab, the open-loop frequency domain characteristic could be derived accurately with the open-loop step response. Then, the closed-loop regulator could be designed with the open-loop frequency domain characteristic to fulfill the steady and dynamic requirements. This method is suitable for most of the systems. An example of Buck converter is proposed to represent the analysis process. Simulation model is built in Matlab software, and some factors which affect the precision of model identification and frequency domain analysis are taken into consideration. Finally, both open- and closed-loop experimental results verify the feasibility of the proposed scheme.

• Periodical: Advanced Materials Research (Volumes 452-453)
• Pages: 364-368
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.452-453.364
• Online since: January 2012
• Authors: Jian Hu Jiang, Chao Wu, Ting Bu
• Keywords: Buck Converter, Frequency Domain Analysis, Step Response, System Identification

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