STABILITY ANALYSIS OF SEPIC CONVERTER USING MATLAB/SIMULINK
DC-DC converter is a converter where we are regulating the input voltage to get the desired output voltage which is either greater than or equal to or less than the input voltage with positive or negative polarity. A lot of dc-dc converters are available in the world out of which SEPIC (Single-Ended Primary-Inductor Converter) converter is one of them. To analyse the converter, a lot of techniques are available. This paper presents the use of MATLAB/SIMULINK to study the stability of the converter. The state space technique is applied to this higher order converter and converted into transfer function. The reduced order technique is applied to the system and compared with the higher order system which gives approximate results for all type of analysis.
Improved Routh-Pade/spl acute/ approximants: a computer-aided approach
A geometric programming based computer-aided method to derive a reduced order (rth-order) approximant for a given (stable) SISO linear continuous-time system is presented. In this method, stability and the first r time moments/Markov parameters are preserved as well as the errors between a set of subsequent time moments/Markov parameters of the system and those of the model are minimized.
Model reduction for a class of linear dynamic systems
Abstract In this paper, a model reduction technique to remedy the singularity of reduced-order models is proposed. The approach adopted is based on the least-square fitting of time-moments of the system. The proposed method is also available to stabilize unstable reduced models. This method is superior to the existing techniques as shown in the numerical examples. It will be proved that this method always gives a stable reduced model assuming the original system is stable.