The estimation of velocity vector fields from time-varying image sequences
CVGIP: Image Understanding, 1991Summary: Changes in successive images from a time-varying image sequence of a scene can be characterized by velocity vector fields. The estimate of the velocity vector field is determined as a compromise between optical flow and directional smoothness constraints.
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Velocity propagation with a time-varying slew rate vector for strapdown INS
Measurement, 2020Abstract The traditional velocity integration algorithms in a strapdown inertial navigation system are to approximate the rotational vector which related to the transformation matrix and then integrate the transformed specific force vector over the velocity update interval.
Yueyang Ben +3 more
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Impact Time Control Guidance Law for Guided Projectile Considering Time-Varying Velocity
2019 SICE International Symposium on Control Systems (SICE ISCS), 2019A novel impact time control guidance law for guided projectile considering time-varying velocity is presented based on linearized relative motion model, optimal control theory and trajectory prediction algorithm. In the process of deriving the guidance law, a time-to-go estimation formula for guided projectile with time-varying velocity is also ...
Shuai Ma, Xugang Wang, Zhongyuan Wang
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An adaptive disruption based gravitational search algorithm with time-varying velocity limitation
2016 35th Chinese Control Conference (CCC), 2016Gravitational Search Algorithm (GSA) is a swarm intelligence algorithm based on the Newtonian laws of gravity and motion. In this paper, a kind of time-varying velocity limitation strategy is presented to simulate the motion process of the masses in Standard GSA (SGSA), which is beneficial to improve convergence speed.
GuiYan Ding, DaQin Zhang, Hao Liu
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The Distribution of Dissolved Oxygen in a Stream with Time Varying Velocity
Water Resources Research, 1968The solutions of the equations that describe the distribution of biochemical oxygen demand (BOD) and dissolved oxygen deficit (DOD) in an idealized natural stream with a time varying velocity can be obtained intuitively from an extension of the well known solutions, which apply for a constant stream velocity.
Dominic M. Di Toro, Donald J. O'Connor
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Analytical optimal impact angle control guidance law considering time-varying velocity
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace EngineeringWhen the missile velocity is time-varying, the assumption of constant velocity leads to a deviation in the prediction of impact angle. This deviation requires additional control effort to nullify the error, leading to decreased terminal velocity and reduced impact effectiveness.
Peng Wang +4 more
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Flocking of Multi-agent Systems Following Virtual Leader with Time-Varying Velocity
Chinese Physics Letters, 2009We consider the collective dynamics for a multi-agent system with a virtual leader. The velocity of the leader is time-varying and the interconnection topology of position network is switching based on the distances between agents. To track the leader in flocking, a neighbour-based local piecewise smooth controller is proposed for each agent. Using the
Yang Ji-Chen, Lu Qi-Shao
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Three-Dimensional Cooperative Guidance Law with Time-Varying Velocities
2023Shuai Zhenan +4 more
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Chaotic Oscillations in Axially Travelling String with Time Varying Velocity
2022Shashendra Kumar Sahoo +2 more
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Three-Dimensional Path Following Method for UAV with Time-varying Velocity
2023 7th International Symposium on Computer Science and Intelligent Control (ISCSIC), 2023Wei Liu +3 more
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