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检索条件"任意字段=3rd International Conference on Robotics and Control Engineering, RobCE 2023"

共 3900 条记录，以下是1771-1780 订阅

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Third international conference on Mechanical, Electronics, and Electrical and Automation control, METMS 2023

Third International Conference on Mechanical, Electronics, a...

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3rd international conference on Mechanical, Electronics, and Electrical and Automation control, METMS 2023

ISBN: (纸本)9781510666689

The proceedings contain 180 papers. The topics discussed include: stress analysis and suggestions for pipelines in underwater drilling and blasting tunnels;orbital trains for collecting wave energy in all directions on the ocean surface;analysis of static characteristics of gantry machine tool-foundation system;numerical simulation of magnetic circuit characteristic based on magnetohydrodynamic momentum ring;failure analysis of lifting wire rope fracture in elevator installation accident;key component performance analysis of lifting spreader automatic unhooking based on Ansys workbench;numerical simulation study of fluid field based on a magnetohydrodynamics momentum ring;drag reduction analysis of structured topological fish scale surface;digital measurement of corrugated plate structure parameters of plate heat exchanger;and high performance of liquid nitrogen zero boil-off system based on high-purity germanium detection.

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Small target detection in aerial photography based on improved YOLOv5

Small target detection in aerial photography based on improv...

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robotics, Automation and Intelligent control (ICRAIC), international conference on

作者： Zenghui Guo Lijin Guo School of Control Science and Engineering Tiangong University Tianjin P.R. China

Considering the characteristics of large numbers, dense distribution, and complex background of small goals in unmanned aerial vehicles (UAVs) aerial graphics, target detection of small objects approach based on modified YOLOv5s is designed. To address the issue of inadequate utilization of features across different scales in the original network, a multi-scale feature fusion approach is devised to comprehensively extract features and enhance their utilization. The method combines the adaptive spatial feature fusion (ASFF) module and an additional small object detection layer, which is used to learn fused spatial weights for the feature map at each scale and fully extract the features. The improved YOLOv5 highlights important information features during feature fusion. Experimental findings on the public dataset VisDrone show that the mAP 50 and mAP 50:95 of the improved network is 41.3% and 23.7%, which are 7.2% and 4.9% higher than those of the original YOLOv5s, respectively. The visualization experiment further verifies the improved algorithm can increase the detection accuracy of dense small targets.

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A switching composition of horizontal and vertical controllers for a UAV to reach a 3D waypoint 3

A switching composition of horizontal and vertical controlle...

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3rd Modeling, Estimation and control conference (MECC)

作者： Milutinovic, Dejan Casbeer, David W. Rasmussen, Steven Univ Calif Santa Cruz Santa Cruz CA 95064 USA Air Force Res Lab Controls Sci Ctr Excellence Wright Patterson AFB OH 45433 USA Miami Valley Aerosp LLC Air Force Res Lab Wright Patterson AFB OH 45433 USA

ISBN: (纸本)9781713872344

The aim of this paper is to explore potential of feedback control design based on a switching composition of two controllers. The paper considers two stochastic optimal controllers for the motion of an unmanned aerial vehicle (UAV) in the horizontal and vertical planes. We show that the two controllers, one for reaching a point in the horizontal plane and the other for reaching and keeping a desired altitude in the vertical plane, can be computed using Cartesian coordinates. To reach a desired waypoint in 3D, both controllers are necessary while the vehicle has to reach simultaneously the horizontal and vertical navigation goals. For this reason, we compute the expected time of each controller toward its goal in 2D. Then, we propose a switching rule that guarantees the simultaneous arrival of each controller to its 2D goal, which is equivalent to the vehicle reaching the 3D waypoint. Finally, we explore a possibility for improvements of the switching rule using reinforcement learning and an actor-critic neural network. The paper results are illustrated by numerical simulations.

关键词： stochastic optimal control unmanned aerial vehicles neural networks reinforcement learning hierarchical control design

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Characteristics of Electrohydraulic control System for Electromechanical Coupled Transmission of Plug in Hybrid Electric Vehicles 3

Characteristics of Electrohydraulic Control System for Elect...

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3rd international conference on Machine Learning and Big Data Analytics for IoT Security and Privacy, SPIoT2023

作者： Li, Quan Wang, Rong Wang, Zhe Zhou, Dingwu Shi, Qingfeng Liu, Haixiong Hunan Automotive Engineering Vocational College Hunan Zhuzhou412001 China

This study focuses on exploring the characteristics of the electromechanical coupling transmission electro-hydraulic control system of plug-in hybrid electric vehicles, and proposes corresponding optimization measures to improve the performance and economy of the vehicle, and reduce the impact on the environment. Firstly, we analyze the working mode of plug-in hybrid vehicles;then design the structure of electromechanical coupling with variable speed and the main components of the electro-hydraulic control system, including flow control system, cooling lubrication circuit, brake and shift control circuit, hydraulic valve and spring. Finally, we applied AMESim simulation software to analyze the response characteristics of each hydraulic valve and optimized the relevant parameters of the valve based on the simulation results. By establishing a dynamic simulation model for the electro-hydraulic control system, in-depth analysis is conducted on the pressure and flow response characteristics of the clutch under slope and step signal control. © 2023 Elsevier B.V.. All rights reserved.

关键词： Genetic algorithms

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Fast Mask Optimization Based on Self-Calibrated Convolutions 3

Fast Mask Optimization Based on Self-Calibrated Convolutions

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3rd international conference on Optics and Image Processing, ICOIP 2023

作者： Zhao, Yichen Xu, Shuang Pan, Jinwei Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China

ISBN: (纸本)9781510667426

A mask optimization method based on self-calibrated convolutions is proposed in this paper to reduce the imaging distortion caused by optical proximity effect(OPE). The network model was constructed by combining the inverse lithography technology(ILT), and the parameters of the network model were optimized by the dataset for training. The dataset includes the target pattern and the mask optimized by gradient descent method. The network model based on self-calibrated convolutions can output an optimized mask according to the target pattern, and the optimized mask is passed through the lithography forward model to obtain the exposure pattern. By the simulation experiment, compared with the traditional gradient-based method, proposed method in this paper has high computational efficiency and small error. © 2023 SPIE. All rights reserved.

关键词： Convolution

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Wearable Piezoresistive Pressure Sensor Based on Graphene and PDMS Nanocomposite Sponge for Foot Steps Detection

Wearable Piezoresistive Pressure Sensor Based on Graphene an...

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Computer, control and robotics (ICCCR), international conference on

作者： Eric Kwame Owusu Aristide Djoulde Mei Liu Jiang Zhen Shanghai Key Laboratory of Intelligent Manufacturing and Robotics School of Mechatronic Engineering and Automation Shanghai University Shanghai China

Wearable sensors based on nanocomposite sponge are gaining popularity due to their high sensitivity, stretchability and offer new opportunities for applications ranging from finger motion detection to soft robotics. However, when designing skin-adaptable, mountable, or non-invasive wearable devices, several features need to be taken into account, such as stretchability, flexibility, sensitivity, and biocompatibility. Herein, we present a facile, cost-effective, flexible, and stretchable piezoresistive pressure sensor based on a graphene/polydimethylsiloxane (PDMS) nanocomposite sponge (GPNCS) for finger motion detection. The maximum sensitivities were 133.95 kPa −1 for the pressure range of 1–10 N and 5.05 kPa −1 for the pressure range of 10–20 N respectively. When various pressures are applied, the pressure response of the devices are highly stable, repeatable, and reversible. Moreover, the piezoresistive pressure sensor has excellent sensing performance at various pressures ranging from 1 to 20 N and is mechanically robust enough to work under repeated load without degradation. The proposed device demonstrated an exceptional ability to monitor small and large finger motion, which has numerous applications in the range of finger motion detection, flexible insole as wearable healthcare monitoring and gait monitoring device

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RESEARCH ON FLIGHT TEST METHOD AND RISK control OF CIVIL AIRCRAFT WITH MAXIMUM PRACTICABLE RATE FOR ROTATION 3

RESEARCH ON FLIGHT TEST METHOD AND RISK CONTROL OF CIVIL AIR...

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3rd international conference on Mechanical, Aerospace and Automotive engineering, CMAAE 2023

作者： Cai, Ji Shanghai China

ISBN: (纸本)9781839539954

The maximum practicable rate for rotation flight test is an important subject for verifying the rotation speed VR and lift-off speed VLOF of aircraft, which has the characteristics of high difficulty and high risk. This article gives the regulation basis and dynamics analysis, and provides flight test preparation, flight test content and methods. The mainly regulation of this subject is CCAR25.107 (e)(1), (2) which defines the rotation speed VR. The flight test preparation includes pre-flight test subjects, required test equipment and weather condition. The flight test content analysis includes the selection of test points, flight test method and acceptable criteria. The maximum practicable rate for rotation tests at the situation of low speed, one engine inoperative, and quick lift-off. The hazard of this subject are aircraft structural damage or accidental ground contact, insufficient obstacle crossing ability and deviated from the runway. The hazard mitigations are made to keep the flight test safe. By the research of the methods of maximum practicable rate for rotation, it proposes flight test risk assessment of the subject, and provides relevant risk control methods and hazard mitigations to keep safety. © The Institution of engineering & Technology 2023.

关键词： Flight testing

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Modular design of aircraft system software 3

Modular design of aircraft system software

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3rd international conference on Artificial Intelligence and Computer engineering, ICAICE 2022

作者： Zhang, Chao Cheng, Guang yao Shao, Ai ju Wang, Dong dong Zhang, Tian Beijing Institute of Space Long March Vehicle 1Nandahongmen Fengtai District Beijing China

ISBN: (纸本)9781510663473

For different application scenarios, aerospace vehicle control systems may use different flight control hardware platforms, flight control strategies, and control functions, and the variability in adoption may lead to difficulties in the development and transplantation of software for general purpose. In this paper, we propose a new idea to adopt modular design to decompose the vehicle control software functions into sensor data unpacking, navigation calculation, attitude control calculation, data fusion, control output, hardware driver, thread scheduling and other modules, modular packaging design for each function, and hierarchical design for the overall architecture to achieve the minimum modification to meet the development needs of different application scenarios, while having better The overall architecture is designed in a hierarchical way to meet the development needs of different applications with minimal modifications and good scalability. © 2023 SPIE.

关键词： Flight control systems

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Effects of structural parameters on the motion variability of the continuously variable valve mechanism 3

Effects of structural parameters on the motion variability o...

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3rd international conference on Mechanical Design and Simulation, MDS 2023

作者： Cui, Jingchen Yang, Yiming School of Energy and Power Engineering Dalian University of Technology Dalian116024 China

ISBN: (纸本)9781510664890

Facing the significant demand for energy saving and emission reduction in the internal combustion engine industry, a new continuous variable valve mechanism (CVVM) is designed for marine medium and high-speed internal combustion engines. By building a single-degree-of-freedom mathematical model, the influence of eccentric shaft position, eccentricity, and input rocker arm ratio on the variable characteristics of the mechanical motion is studied. The results show that the single-degree-of-freedom mathematical model is accurate and can be used to research mechanism motion variability. Under different vital structural parameters, the mechanism exhibits four variable motion modes with the adjustment of the phase of the eccentric wheel. For the continuously variable Miller mode, when the input rocker arm of the mechanism is constant, and the initial position is the same, the valve motion interference phenomenon is more serious when the eccentric shaft position is farther away from the camshaft, the eccentricity is more extensive, and the input rocker arm ratio is larger. The maximum lift of the valve is unchanged under the influence of eccentricity, and the larger the input rocker ratio, the greater the maximum lift of the valve. © 2023 SPIE.

关键词： Emission control

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Obstacle Avoidance and Communication Distance Maintenance During Cooperative Target Encircling control of USVs Based on control Barrier Functions 1

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3rd international conference on Autonomous Unmanned Systems, ICAUS 2023

作者： Yu, Wenzhao Lu, Taiyu Xu, Haixiang Ministry of Education Key Laboratory of High Performance Ship Technology Wuhan430063 China School of Naval Architecture Ocean and Engine Power Engineering Wuhan University of Technology Wuhan430063 China

ISBN: (数字)9789819710959

ISBN: (纸本)9789819710942

In this paper, a distributed guidance law based on control barrier functions is proposed for the cooperative encircling control of multiple unmanned surface vehicles (multi-USVs) under obstacle avoidance and communication distance maintenance. Firstly, a cooperative encircling guidance law that only requires neighboring vehicle information is designed to achieve encircling the moving target. Secondly, the control barrier functions (CBFs) are introduced to establish the quadratic optimization problem with obstacle avoidance constraint and communication distance constraint. Optimizing the guidance law can ensure that neighboring USVs always remain in communication range while avoiding static obstacles. Finally, the comparison simulations with respect to traditional method are carried out. The results shows that the proposed control method can effectively improve the performance of executing encircling tasks in obstacle environment and smooth the control output so as to enhance its practicality. © Beijing HIWING Scientific and Technological Information Institute 2024.

关键词： Multi agent systems

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