Results 11 to 20 of about 765,120 (288)

Visual servoing of robot manipulator with weak field-of-view constraints

open access: yesInternational Journal of Advanced Robotic Systems, 2021
Aiming at the problem of servoing task failure caused by the manipulated object deviating from the camera field-of-view (FOV) during the robot manipulator visual servoing (VS) process, a new VS method based on an improved tracking learning detection (TLD) algorithm is proposed in this article, which allows the manipulated object to deviate from the ...
Jing Xin, Han Cheng, Baojing Ran
openaire   +2 more sources

Barrier Lyapunov Function Based Integrated Missile Guidance and Control Considering Phased Array Seeker Disturbance Rejection Rate

open access: yesIEEE Access, 2022
A two-dimensional missile–target engagement geometry is established considering the effect of the disturbance rejection rate (DRR) problem caused by phased array radar beam pointing error and radome refraction error in the guidance and control ...
Shih-Yao Lin, Jiang Wang, Wei Wang
doaj   +1 more source

Impact Angle Control Guidance Law Considering the Seeker’s Field-of-View Constraint Applied to Variable Speed Missiles

open access: yesIEEE Access, 2020
Recently, multiple constraints have been considered in the design of guidance laws. Most of the existing impact angle control guidance laws considering the seeker's field-of-view constraint are only applicable to constant speed missiles and have other ...
Shou Zhou   +3 more
doaj   +1 more source

Ceiling-View Semi-Direct Monocular Visual Odometry with Planar Constraint

open access: yesRemote Sensing, 2022
When the SLAM algorithm is used to provide positioning services for a robot in an indoor scene, dynamic obstacles can interfere with the robot’s observation.
Yishen Wang   +2 more
doaj   +1 more source

Accurate Calibration of a Large Field of View Camera with Coplanar Constraint for Large-Scale Specular Three-Dimensional Profile Measurement

open access: yesSensors, 2023
In the vision-based inspection of specular or shiny surfaces, we often compute the camera pose with respect to a reference plane by analyzing images of calibration grids, reflected in such a surface.
Rongsheng Lu, Zhizhuo Wang, Zhiting Zou
doaj   +1 more source

Design of Three-Dimensional Vector Guidance Law for Attack Time and Angle under Field of View Angle Constraints [PDF]

open access: yesHangkong bingqi
In order to enhance the precision of missile strikes on targets, controlling the three-dimensional gui-dance problem involving attack time and attack angle is of significant importance in practical applications.
Xiong Tianhao, Wang Changyuan, Zhang Ke, Su Yu, Guo Zhengyu
doaj   +1 more source

Array Synthetic Aperture Ladar with High Spatial Resolution Technology

open access: yesLeida xuebao, 2022
By extending synthetic aperture technology from the microwave band to the laser wavelength, Synthetic Aperture Ladar (SAL) has long-distance imaging and extremely high spatial resolution independent of the target distance.
Bingnan WANG   +6 more
doaj   +1 more source

Spin Glasses and Nonlinear Constraints in Portfolio Optimization [PDF]

open access: yes, 2013
We discuss the portfolio optimization problem with the obligatory deposits constraint. Recently it has been shown that as a consequence of this nonlinear constraint, the solution consists of an exponentially large number of optimal portfolios, completely
Andrecut, M.
core   +1 more source

A Guidance Strategy for Strapdown Seeker considering Minimum Field-of-View Angle Constraint

open access: yesInternational Journal of Aerospace Engineering, 2020
An off-axis strapdown seeker in missile may lead to a minimum field-of-view (FOV) angle constraint problem. The goal of this paper is to deal with the problem in guidance.
Guanqun Zhou, Qunli Xia
doaj   +1 more source

Integrated Strapdown Missile Guidance and Control With Field-of-View Constraint and Actuator Saturation

open access: yesIEEE Access, 2020
This paper presents an integrated guidance and control (IGC) law for the strapdown homing missile with consideration of the field-of-view (FOV) constraint and actuator saturation.
Jiayi Tian   +4 more
doaj   +1 more source

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