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Both H∞ optimization techniques and eigenstructure assignment have their unique significances in control engineering. The first one is an effective method to ensure the robust stability of the closed loop system whereas the second one is very useful in shaping the transient response of the closed loop system by placing the eigenvalues and eigenvectors in the desired locations. Hence, to design a controller...
This paper demonstrates a discrete-time state observer for a 3DOF helicopter subject to unknown perturbations. The observer is based on a very recent second order sliding mode scheme [12], which is robust in spite of uncertainties and perturbations, ensures finite time convergence to boundary layer, reduces the chattering, increases estimation accuracy and does not require the knowledge of the bound...
A star sensor based new method for estimation of satellite angular rates through derivative approach is proposed. The method is based on “optic flow” of star image patterns formed on a star sensor array. The satellite angular rates are derived directly from the 2D-coordinates of star images. Therefore, the proposed algorithm is computationally efficient in the category of vector derivative approach,...
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