Results 51 to 60 of about 75,283 (193)

A Unified Grid-Forming and Grid-Following Primary Control Design With Optimized Enforcement of Grid Operational Constraints

open access: yesIEEE Access, 2023
A novel, unified control design is proposed for software-defined inverters (SDIs) to operate in either grid-forming (GFM) or grid-following (GFL) mode in AC grids/microgrids and to switch between the two modes seamlessly.
Soumyadeep Nag, Zhihua Qu, Ying Xu
doaj   +1 more source

Online Inverse Optimal Control for Control-Constrained Discrete-Time Systems on Finite and Infinite Horizons

open access: yes, 2020
In this paper, we consider the problem of computing parameters of an objective function for a discrete-time optimal control problem from state and control trajectories with active control constraints.
Ford, Jason J.   +2 more
core   +1 more source

Cooperative attack strategy during the terminal guidance phase for loitering munitions based on impact angle and impact time constraints

open access: yesXibei Gongye Daxue Xuebao
In order to solve the cooperative attack problem during the terminal guidance phase for loitering munition swarm, a cooperative attack strategy for loitering munitions with impact angle constraints is proposed.
ZHAO Junmin   +3 more
doaj   +1 more source

Two-Dimensional Continuous Terminal Interception Guidance Law With Predefined Convergence Performance

open access: yesIEEE Access, 2018
This paper derives a new terminal homing guidance law for missiles to intercept noncooperative maneuvering targets subject to the constraint of terminal line-of-sight angle. The new guidance law avoids abrupt and large changes in guidance commands, while
Shi Lyu, Zheng H. Zhu
doaj   +1 more source

Neural Network Assisted Inverse Dynamic Guidance for Terminally Constrained Entry Flight

open access: yesThe Scientific World Journal, 2014
This paper presents a neural network assisted entry guidance law that is designed by applying Bézier approximation. It is shown that a fully constrained approximation of a reference trajectory can be made by using the Bézier curve.
Hao Zhou, Tawfiqur Rahman, Wanchun Chen
doaj   +1 more source

Midcourse Guidance Law Based on High Target Acquisition Probability Considering Angular Constraint and Line-of-Sight Angle Rate Control

open access: yesInternational Journal of Aerospace Engineering, 2016
Random disturbance factors would lead to the variation of target acquisition point during the long distance flight. To acquire a high target acquisition probability and improve the impact precision, missiles should be guided to an appropriate target ...
Xiao Liu   +4 more
doaj   +1 more source

Neural Network-Based Path Planning for Fixed-Wing UAVs with Constraints on Terminal Roll Angle

open access: yesDrones
This paper presents a neural network-based path planning method for fixed-wing UAVs under terminal roll-angle constraints. The nonlinear optimal path planning problem is first formulated as an optimal control problem.
Qian Xu, Fanchen Wu, Zheng Chen
doaj   +1 more source

Trajectory Shaping of Surface-to-surface Missile with Terminal Impact Angle Constraint [PDF]

open access: yes, 2007
This paper presents trajectory shaping of a surface-to-surface missile attacking a fixed with terminal impact angleconstraint. The missile must hit the target from above, subject to the missile dynamics and path constraints.
Subchan, S. (S)
core  

Rendezvous targeting for space missions [PDF]

open access: yes
A brief outline of a targeting program for use in the space shuttle mission is presented. This general purpose program can accept a large variety of constraints and can be applied to each maneuver sequence contained in the rendezvous sequence.
Tempelman, W. H.
core   +1 more source

Time-coordination entry trajectory planning for multihypersonic vehicles

open access: yes工程科学学报
In recent years, the research on high-speed vehicles has become a hot spot, among which the research on hypersonic vehicles is particularly important. Multihypersonic vehicles will inevitably work cooperatively in the future under the weaponization and ...
Yuqing ZHANG   +5 more
doaj   +1 more source

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