Krishnamoorthy Natarajan

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The frequency domain approach to adaptive control or autotuning of proportional plus integral (PI) controllers is considered in this paper. The frequency response of the process is computed from an overparametrized recursive least-squares (RLS) model and used at sample intervals to tune the PI. By simulations it is shown that the frequency response(More)
The nonlinearity arising from parasitic parameters in a boost converter is investigated in this paper. It is shown that this nonlinearity can cause a serious instability problem for boost converter control. The nonlinearity makes robust controller design difficult due to sensitivity to disturbances. Static and dynamic voltage collapse is studied.(More)
When the boost converter operates in continuous and discontinuous inductor current operation modes, owing to the relatively more complicated nature of the boost converter with non-ideal elements, a parsimonious large signal and small signal model for this converter, with and without feedback, is lacking. In this work, a zero order hold (ZOH) equivalent(More)
Computation of accurate time domain signal waveforms in VLSI interconnects, taking into account the distributed inductance of the line, has grown in importance with increasing clock speeds. A computationally efficient truncated Fourier series method for computing time domain waveforms is summarized in this work. The method assumes excitation of the VLSI(More)
This paper presents a performance based comparative study of various fuzzy logic controllers (FLCs) to control the speed of squirrel-cage induction motor (SCIM) by replacing the conventional proportional??integral (PI) controller. The fuzzy logic based controller does not require any identification of motor dynamic to control its speed and also assures the(More)
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