Abstract
We have proposed a new technique to estimate the smoothed and differential values of the sensor inputs by using sliding mode system (ESDS). ESDS is one of the nonlinear digital filters, and it works very effectively to eliminate the impulsive noise by keeping the sudden shift of signals. However, because ESDS is nonlinear system, it is very difficult to clarify the behavior of system analytically. In this paper, we clarify the signal tracking performance of ESDS by performing phase plane analysis. As input signal, we assume the step function, direct function and quadratic function, and we show the signal tracking performance with discrete representation. At the same time, we discuss the limitation of its analysis by using phase plane.
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