Results 31 to 40 of about 89,928 (168)

Analysis of underwater plasma discharge based on equivalent circuit parameters

AIP Advances, 2021
The control of discharge mode and the optimization of energy efficiency are of particular concern as the significant impact on the application of the underwater plasma discharge system.
Liang Qiao, Xiaobing Zhang, Bing Yan, Zhen Han, Chao Yang, Yang Liu   +5 more
doaj   +1 more source

Nonlinear Model Predictive Control for Heavy-Duty Hybrid Electric Vehicles Using Random Power Prediction Method

IEEE Access, 2020
A primary challenge to the implementation of hybrid electric vehicles (HEVs) is the design of the energy management strategy for the vehicle. Most conventional strategies have been designed for passenger vehicles using rule-based or optimization-based ...
Luming Chen, Zili Liao, Xiaojun Ma
doaj   +1 more source

Radar Error Correction Method Based on Improved Sparrow Search Algorithm

Applied Sciences
Aiming at the problem of the limited application range and low accuracy of existing radar calibration methods, this paper studies the radar calibration method based on cooperative targets, and establishes the integrated radar measurement error model ...
Yifei Liu, Zhangsong Shi, Bing Fu, Huihui Xu   +3 more
doaj   +1 more source

Analysis of the Magnus Moment Aerodynamic Characteristics of Rotating Missiles at High Altitudes

International Journal of Aerospace Engineering, 2021
The Magnus moment characteristics of rotating missiles with Mach numbers of 1.3 and 1.5 at different altitudes and angles of attack were numerically simulated based on the transition SST model.
Yihang Xu, Shaosong Chen, Hang Zhou
doaj   +1 more source

Mixed-Sensitivity H_∞ Position Control for PMSM Based on Triple-Loop Structure With Anti-Windup PI and Robust Outer Loop Design

IEEE Access
To improve the control accuracy and robustness of permanent magnet synchronous motors (PMSMs) under complex operating conditions, this paper proposes a triple closed-loop position control strategy based on mixed-sensitivity H ${}_{\infty } $ control. In
Guanyue Zhang, Chunguang Liu, Dong Yuan, Jiaqi Li   +3 more
doaj   +1 more source

Ballistic impact response of a heat-treated dual-phase Ti–5.2Mo–4.8Al–2.5Zr–1.7Cr alloy with hierarchical microstructure

Journal of Materials Research and Technology, 2023
In the present study, a dual-phase Ti-5.2Mo-4.8Al-2.5Zr-1.7Cr alloy was hot-rolled at 980 °C with a thickness reduction of 65% and then heat-treated with the strategy of 920 °C/1 h/water quenching +550 °C/6 h/air cooling, and a hierarchical ...
Xinjie Zhu, Guxin Zhou, Lidong Zhang, Duoduo Wang, Feng Han, Yanlin Pan, Yujing Lang, Qunbo Fan   +7 more
doaj   +1 more source

Study of relationship between motion of mechanisms in gas operated weapon and its shock absorber

Defence Technology
The article deals with the motion of the breech block carrier and the weapon casing of an automatic weapon mounted on a flexible carriage and the base of the weapon.
Jiri Balla, Roman Vitek, Dung Nguyen Van, Zbynek Krist, Hung Nguyen Van   +4 more
doaj   +1 more source

Multi-UAV Obstacle Avoidance and Formation Control in Unknown Environments

Drones
To address the issues of local minima, target unreachability, and significant formation disruption during obstacle avoidance in the conventional artificial potential field (APF), a control approach that integrates APF with optimal consensus control which
Yawen Li, Pengfei Zhang, Zhongliu Wang, Dian Rong, Muyang Niu, Cong Liu   +5 more
doaj   +1 more source

Study on Thermophysical Properties and Electrical Conductivity Characteristics of Combustion Products from Propellants with Ionization Seeds

Aerospace
Detailed knowledge regarding the thermophysical properties and electrical conductivity of the combustion products derived from solid propellants is essential for the optimized design and operation of solid-fuel rocket engines employing ...
Chunlin Chen, Lei Chang, Baoquan Mao, Qijin Zhao, Renbin Li, Xianghua Bai   +5 more
doaj   +1 more source

Mechanical Behavior of Ultrafine Gradient Grain Structures Produced via Ambient and Cryogenic Surface Mechanical Attrition Treatment in Iron

Metals, 2015
Ambient and cryogenic surface mechanical attrition treatments (SMAT) are applied to bcc iron plate. Both processes result in significant surface grain refinement down to the ultrafine-grained regime; the cryogenic treatment results in a 45% greater grain
Heather A. Murdoch, Kristopher A. Darling, Anthony J. Roberts, Laszlo Kecskes   +3 more
doaj   +1 more source