On simplification of unstable systems using Routh approximation technique
A. Seshagiri Rao, S.S. Lamba, Shodhan Rao · IEEE Transactions on Automatic Control · 1978
A modified modeling procedure using the direct Routh approximation method (DRAM) for a class of unstable systems has been presented in this technical note. The proposed method yields a model which is based on an improved matching of tile Taylor series expansion arounds=0. A numerical example is included.