Results 71 to 80 of about 75,283 (193)

A Generalized Super-Twisting Extended State Observer for Angle-Constrained Terminal Sliding Mode Guidance Law

Aerospace
In this article, a novel finite-time convergent three-dimensional terminal sliding mode guidance law is proposed for intercepting maneuvering targets in three-dimensional space with terminal angle constraints. The proposed guidance law introduces a novel
Zhe Hu, Liang Xiao, Wenjun Yi
doaj   +1 more source

Interactive orbital proximity operations planning system [PDF]

An interactive, graphical proximity operations planning system was developed which allows on-site design of efficient, complex, multiburn maneuvers in the dynamic multispacecraft environment about the space station. Maneuvering takes place in, as well as
Ellis, Stephen R., Grunwald, Arthur J.
core   +1 more source

Bank-to-turn control technology survey for homing missiles [PDF]

The potential advantages of bank-to-turn control are summarized. Recent and current programs actively investigating bank-to-turn steering are reviewed and critical technology areas concerned with bank-to-turn control are ...
Riedel, F. W.
core   +1 more source

Minimum fuel horizontal flightpaths in the terminal area [PDF]

The problem of minimum fuel airplane trajectories from arbitrary initial states to be fixed final state is considered. There are four state variables (two position coordinates, heading, and constrained velocity) and two constrained controls (thrust and ...
Kreindler, E., Neuman, F.
core   +1 more source

Launch vehicle error sensitivity study [PDF]

Booster trajectory optimization for launch vehicle range sensitivity ...
Rosenbaum, R. C., Willwerth, R. E.
core   +2 more sources

Minimum Altitude-Loss Soaring in a Specified Vertical Wind Distribution [PDF]

Minimum altitude-loss flight of a sailplane through a given vertical wind distribution is discussed. The problem is posed as an optimal control problem, and several numerical solutions are obtained for a sinusoidal wind ...
Chen, I., Pierson, B. L.
core   +1 more source

Automation of On-Board Flightpath Management [PDF]

The status of concepts and techniques for the design of onboard flight path management systems is reviewed. Such systems are designed to increase flight efficiency and safety by automating the optimization of flight procedures onboard aircraft.
Erzberger, H.
core   +1 more source

Pathfinder autonomous rendezvous and docking project [PDF]

Capabilities are being developed and demonstrated to support manned and unmanned vehicle operations in lunar and planetary orbits. In this initial phase, primary emphasis is placed on definition of the system requirements for candidate Pathfinder mission
Lamkin, Stephen, Mccandless, Wayne
core   +1 more source

Deep Reinforcement Learning-Based Impact Angle-Constrained Adaptive Guidance Law

Mathematics
This study presents an advanced second-order sliding-mode guidance law with a terminal impact angle constraint, which ingeniously combines reinforcement learning algorithms with the nonsingular terminal sliding-mode control (NTSM) theory.
Zhe Hu, Wenjun Yi, Liang Xiao
doaj   +1 more source

A Novel Continuous Three‐Dimensional Adaptive Finite‐Time Nonsingular Terminal Sliding Mode Guidance Law With Impact Angle and Input Saturation Constraints for Intercepting Maneuvering Targets

Engineering Reports
The guidance laws for intercepting maneuvering targets in three‐dimensional (3D) space poses considerable challenges owing to various inescapable factors. These factors include the impact angle, input saturation constraints, and uncertainty.
Shaokui Shen, Hua Wang, Dongze Qin
doaj   +1 more source