1,721,007 research outputs found
The Nanobalance test-stand for micro-thrust measurements: digital control and data processing
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Embedded model control: application to electrovalves
No full textThe paper briefly illustrates the Embedded Model Control (EMC) methodology, a model/observer based design procedure addressed to industrial engineers and technicians capable of plant modelling. Mathematics is reduced to a minimum. Eigenvalue tuning is suggested to be achieved through simulator as a plant surrogate, as it will provide designer with great sensitivity and security. Sophisticated algorithms of modern control might be employed at least for comparison or start-up. Tuning objective is just to reach required performance and to assess margin, not to optimize. The digital control of a proportional electro-hydraulic valve, under test, is presented as an application
Application of the embedded model control to satellite-to-satellite tracking for future Earth observing missions
No full textSatellite-to-satellite tracking for future Earth observation missions: the Embedded Model Control approach
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Articulated and flexible multibody satellite dynamics modeling
No full textThis paper is concerned with the derivation of the equations of motion for a maneuvering flexible satellite orbiting around the Earth. The structure is assumed to undergo large rigid-body maneuvers and small elastic deformations. The mathematical model is worked out in two levels: in the first one attention is focused on the effects of the rigid dynamics on the flexible motion, while in the second one the reciprocal influence is evaluated. The satellite is provided with flexible solar arrays linked up with the main body with torsional and bending articulations: the mathematical model also considers hinges compliance, when the appendages are blocked in the desired position. Different rotational maneuvers are simulated and numerical results highlight the limitation of the first level modelization, which can be used with confidence for structural analysis, but results inadequate for flight dynamics and control applications. © 2002 by the author(s). Published by the American Institute of Aeronautics and Astronautics, Inc
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