Abstract
An online estimation method for single-input single-output (SISO)-type stable systems is discussed based on frequency transformation technique. Reported method based on fast Fourier transform (FFT) is an off-line identification method means the controller is required to remove from the closed loop at the time of autotuning test. So the modified method is suggested for online identification and has been tested on several systems to show the effectiveness of the method. A relay with hysteresis in parallel with proportional–integral (PI) controller induces stationary oscillation cycle whose frequency and amplitude are used for system identification. We consider the development of a non-iterative approach with less computational efforts and a reasonable amount of data. A simulation study is given to illustrate the potential advantage of the presented method.
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Kshatriy, P., Mehta, U. (2015). Online Frequency Domain Identification Method for Stable Systems. In: Vijay, V., Yadav, S., Adhikari, B., Seshadri, H., Fulwani, D. (eds) Systems Thinking Approach for Social Problems. Lecture Notes in Electrical Engineering, vol 327. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2141-8_14
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DOI: https://doi.org/10.1007/978-81-322-2141-8_14
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