Abstract
This paper analyses a frequency domain performance of an adaptive windowing parabolic sliding mode filter (AW-PSMF) by using Describing Function method. The analysis results show that AW-PSMF has similar gain characteristics to that of the second-order Butterworth low-pass filter (2-LPF), but AW-PSMF produces flatter gain behaviour than 2-LPF does at cutoff frequency. In addition, AW-PSMF produces smaller phase lag than 2-LPF does.
Highlights
In feedback control of mechatronic systems, feedback signals are usually corrupted by noise
Toward to the drawbacks of the parabolic sliding mode filter [7], [8], Jin et al [9] presented a new parabolic sliding mode filter, which is referred to PSMF, for effectively removing noise in feedback control systems. It is reported in [9] that PSMF produces smaller phase lag than linear filters, and it is less prone to overshoot than the sliding mode filter [7], [8]
This paper presents a frequency domain performance of adaptive windowing parabolic sliding mode filter (AW-PSMF)
Summary
In feedback control of mechatronic systems, feedback signals are usually corrupted by noise. Toward to the drawbacks of the parabolic sliding mode filter [7], [8], Jin et al [9] presented a new parabolic sliding mode filter, which is referred to PSMF, for effectively removing noise in feedback control systems. It is reported in [9] that PSMF produces smaller phase lag than linear filters, and it is less prone to overshoot than the sliding mode filter [7], [8].
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