932 research outputs found
Almost Complex Structures on (n-1)-connected 2n-manifolds
Let M be a closed (n-1)-connected 2n-dimensional smooth manifold with n > 2.
In terms of the system of invariants for such manifolds introduced by Wall, we
obtain necessary and sufficient conditions for M to admit an almost complex
structure.Comment: 12 page
Multi-Objective Robust H-infinity Control of Spacecraft Rendezvous
Based on the relative motion dynamic model illustrated by C-W equations, the problem of robust Hinfin control for a class of spacecraft rendezvous systems is investigated, which contains parametric uncertainties, external disturbances and input constraints. An Hinfin state-feedback controller is designed via a Lyapunov approach, which guarantees the closed-loop system to meet the multi-objective design requirements. The existence conditions for admissible controllers are formulated in the form of linear matrix inequalities (LMIs), and the controller design is cast into a convex optimization problem subject to LMI constraints. An illustrative example is provided to show the effectiveness of the proposed control design method
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