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The paper proposes an open end winding PMSM based electromechanical actuator for altitude control through Thrust Vector Control. The open end winding configuration has the inherent advantage of applying the voltage directly to the phase thus enabling reduced voltage operation. The paper presents the modeling of the Open end winding PMSM and its drive. The closed loop position control is also modeled to validate the performance of the proposed scheme. The modeling and the simulation study is carried out in MATLAB/SIMULINK. The performance of the proposed system is evaluated through experiments and results are presented.

The vibrational spectra of Lead diselenite, Cadmium diselenite, Manganese diselenite and chromium diselenite have been recorded and analysed on the basis of vibrations due to [Formula: see text] ion. The observed spectra clearly indicate the presence of diselenite group in all these compounds. The spectral analysis confirms the orthorhombic nature of MnSe 2 O 5 as suggested by Koskenlinna et al. A large number of vibrational bands in the symmetric stretching region of PhSe 2 O 5 is due to the existence of different Se-O bond lengths. From the spectra it can be seen that the anion is highly distorted angularly in chromium compound. This high distortion in all modes confirms the presence of three crystallographically distinct diselenite groups in chromium compound.