NASA Technical Reports Server (Ntrs) 19910007793: Research and Development for Onboard Navigation (Onav) Ground Based Expert/Trainer System: Onav Entry Knowledge Requirements Specification Update by NASA Technical Rep...
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NASA Technical Reports Server (Ntrs) 19910007793: Research and Development for Onboard Navigation (Onav) Ground Based Expert/Trainer System: Onav Entry Knowledge Requirements Specification Update by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 20040086542: Supporting the Future Air Traffic Control Projection Process by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 20040086542: Supporting the Future Air Traffic Control Projection Process by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19850008589: Integration of Ground and on-Board System for terminal Count by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19850008589: Integration of Ground and on-Board System for terminal Count by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19890005728: Simulated Final Approach Path Captures Using the Microwave Landing System by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19890005728: Simulated Final Approach Path Captures Using the Microwave Landing System by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19870003119: guidance Law Simulation Studies for Complex Approaches Using the Microwave Landing System (Mls) by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19870003119: guidance Law Simulation Studies for Complex Approaches Using the Microwave Landing System (Mls) by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19980237029: Human Factors Assessment: the Passive Final Approach Spacing Tool (Pfast) Operational Evaluation by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 19980237029: Human Factors Assessment: the Passive Final Approach Spacing Tool (Pfast) Operational Evaluation by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 20040037789: Angle-of-Attack-Modulated terminal Point Control for Neptune Aerocapture by NASA Technical Reports Server (Ntrs); published by
NASA Technical Reports Server (Ntrs) 20040037789: Angle-of-Attack-Modulated terminal Point Control for Neptune Aerocapture by NASA Technical Reports Server (Ntrs); published by
An algorithm is developed for terminal guidance during the main deceleration section of the lunar landing trajectory of a spacecraft with an integrated propulsion system, which has a main engine with variable thrust a...
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An algorithm is developed for terminal guidance during the main deceleration section of the lunar landing trajectory of a spacecraft with an integrated propulsion system, which has a main engine with variable thrust and four auxiliary nonthrottleable engines. A method of guidance adaptation to the actual motion conditions by measuring the thrust acceleration with jumps in time is proposed.
A two-observer scheme has been proposed using higher-order sliding mode algorithms for a general second-order system with a time-varying, uncertain, unknown parameter. The first observer was used for the varying param...
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A two-observer scheme has been proposed using higher-order sliding mode algorithms for a general second-order system with a time-varying, uncertain, unknown parameter. The first observer was used for the varying parameter estimation and using knowledge of this estimated parameter, and the state estimation by second observer was found to be exact. Supertwisting algorithms provide robust, noise-free, finite-time convergent state estimations. The proposed scheme was found to yield accurate and fast converging estimates of the line-of-sight (LOS) rates of the missile system. LOS rate estimates are robust against coupled acceleration disturbance terms. The proposed method for fixed-time parameter estimation and robust state estimation can be used for a class of second-order systems and can be extended to any uncertain plant.
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