Results 1 to 10 of about 3,280,097 (317)
Parameter identification of ship motion mathematical model based on full-scale trial data
International Journal of Naval Architecture and Ocean Engineering, 2022 Using the full-scale trial data of vessel YUKUN, a parameter identification scheme, Support Vector Regression (SVR) combined with modified grey wolf optimizer (MGWO), is proposed for identifying ship motion model.
Yao Meng, Xiufeng Zhang, Jinxin Zhu
doaj +1 more source
Multi-UAV Collaborative Search and Attack Mission Decision-Making in Unknown Environments
Sensors, 2023 To address the challenge of coordinated combat involving multiple UAVs in reconnaissance and search attacks, we propose the Multi-UAV Distributed Self-Organizing Cooperative Intelligence Surveillance and Combat (CISCS) strategy.
Zibin Liang, Qing Li, Guodong Fu
doaj +1 more source
Research on Gradient-Descent Extended Kalman Attitude Estimation Method for Low-Cost MARG
Micromachines, 2022 Aiming at the problem of the weak dynamic performance of the gradient descent method in the attitude and heading reference system, the susceptibility to the interference of accelerometers and magnetometers, and the complex calculation of the nonlinear ...
Ning Liu +4 more
doaj +1 more source
Simulation and Experimental Study on Characteristics of Multiorifice Nozzle in Radial Jet Drilling
Geofluids, 2022 The radial jet drilling (RJD) is a key technology to improve the development efficiency of low-permeability oil and gas resources. In order to seek a reasonable hydraulic engineering parameter combination of hydraulic radial jet drilling, to obtain the ...
Tao Zhang +3 more
doaj +1 more source
Research on Measurement Method of Parachute Scanning Platform Based on MEMS Device
Micromachines, 2021 This paper studies the measurement of motion parameters of a parachute scanning platform. The movement of a parachute scanning platform has fast rotational velocity and a complex attitude.
Ning Liu +3 more
doaj +1 more source
Robust Controller Decorated by Nonlinear S Function and Its Application to Water Tank
Applied System Innovation, 2021 In this manuscript, a concept of modifying the results of the existing robust controller decorated by a nonlinear S function is presented to improve the system performance.
Xianku Zhang, Chunyu Song
doaj +1 more source
Roll angular rate extraction based on modified spline-kernelled chirplet transform
Defence Technology, 2022 The roll angular rate is much crucial for the guidance and control of the projectile. Yet the high-speed rotation of the projectile brings severe challenges to the direct measurement of the roll angular rate.
Hui Zhao +4 more
doaj +1 more source
Optimal Look-Angle Guidance with Field-of-View and Impact Angle Constraints for Strapdown Munition
International Journal of Aerospace Engineering, 2022 A strapdown seeker with limited field-of-view (FOV) can simplify and decrease cost of the guidance system for a munition. However, the inherent defect of the strapdown seeker is that it could not provide the necessary line-of-sight (LOS) angular ...
Peng Wang +4 more
doaj +1 more source
International Journal of Aerospace Engineering, 2021 For a two-stage launch miniature shoulder munition steered with a laser beam riding system, the laser beam points to the target with a limited field radius and approximate straight-line spatial path; thus, the munition could not fly into the laser ...
Jun-Fang Fan, Shi-Wei Chen
doaj +1 more source
Journal of Marine Science and Engineering, 2022 In this paper, under parametric uncertainties and complex disturbances, a leader–follower formation control strategy based on accurate disturbance observer (ADO) and a novel fixed-time fast terminal sliding mode (FTFTSM) control for unmanned surface ...
Helong Shen, Yong Yin, Xiaobin Qian
doaj +1 more source