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Nonlinear sampled-data stabilization of dynamically positioned ships is considered by reduced-order observer-based emulation controllers. Using a backstepping technique, continuous-time state feedback stabilizing feedback laws for ships are designed and then under natural detectability assumption for ships linear time-invariant continuous-time reduced-order observers are obtained. Then combining an...
In this brief, we consider the nonlinear sampled-data stabilization of dynamically positioned ships. Using the nonlinear sampled-data control theory developed by Nesic and the integrator backstepping technique for the Euler approximate model, we design semiglobally practically asymptotically (SPA) stabilizing controllers. We design both state feedback and output feedback controllers. We give a numerical...
Digital control problems for dynamically positioned ships are considered by nonlinear sampled-data control theory based on Euler approximate models. State feedback laws that guarantee semeglobal practical asymptotic (SPA) stability of ships are designed. Then the reference signals for the position and the attitude of ships are introduced and state feedback tracking laws are also designed. The effectiveness...
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