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Wireless actuator node for greenhouse microclimate control

Wireless actuator node for greenhouse microclimate control

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2022 14th international conference on Electronics, Computers and Artificial Intelligence (ECAI)

作者： Dragoş -loan Să că leanu Ş tefan-George Roş u Mihai -Gabriel Matache Irina-Petra Manciu Lucian-Andrei Periş oară Research Centre for Spatial Information Faculty of Electronics Telecommunication and Information Technology University Politehnica of Bucharest Bucharest Romania Faculty of Electronics Telecommunication and Information Technology University Politehnica of Bucharest Bucharest Romania Testing Department The National Institute of Research Development for Machines and Installations Designed for Agriculture and Food Industry Bucharest Romania ETTI Doctoral School University Politehnica of Bucharest Bucharest Romania

ISBN: (数字)9781665495356

ISBN: (纸本)9781665495363

Agriculture has one of the most important roles in society because it provides the food source for the population. Many agricultural activities can be highly enhanced by using digital technologies. In greenhouse farming, all environmental parameters can be adjusted based on crops types. Automation in the greenhouse is a method where farmers are able to monitor and control the greenhouse environment automatically from anywhere in the world at any time. this paper presents a wireless actuator node to control the greenhouse system through the Internet of things (IoT). the node provides outputs for different types of actuators that can usually be found in a greenhouse and it can be controlled using numerous specific communication protocols. the prototype was tested under various scenarios in our laboratory and the experimental results were found as expected. the actuator node functionality was also tested in the greenhouse and demonstrates that it can be used to operate in a real-world environment for optimum control of microclimate conditions.

关键词： Wireless communication Actuators Wireless sensor networks Protocols Green products Crops Control systems

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Design and Signal Quality Assessment of a Novel Low-Cost Wireless EMG Sensor

Design and Signal Quality Assessment of a Novel Low-Cost Wir...

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IEEE international conference on Cyber Technology in Automation, Control, and Intelligent systems

作者： Ziqin Ling Jiangcheng Chen Yaonan Li Ning Xi Department of Industrial and Manufacturing Systems Engineering University of Hong Kong Shenzhen Academy of Robotics Shenzhen China

ISBN: (数字)9798331506056

ISBN: (纸本)9798331506063

Electromyography (EMG) sensors have been widely used for assessing muscle activation state and human-robot interaction (HRI). However, available commercial EMG sensors are expensive and inconvenient for real-time applications. the aim of this study is to design and validate a novel low-cost wireless EMG sensor. Specifically, the wireless EMG sensor is equipped with an analog-front-end (AFE), radio frequency (RF) module, and controller area network (CAN) bus, which achieves wireless data transmission and provides an interface for real-time HRI. the evaluation of the designed system was done by a series of exercises performed by volunteers. Raw signal., mean absolute value (MAV), zero crossings (ZC), slope sign changes (SSC), waveform length (WL), and median frequency (MDF) are used for comparing wireless EMG sensors and commercial sensors. In addition, Spearman's correlation (SC), and intra-class cross-correlation (ICC) are used as two validation indicators. the result shows that the SC and ICC between the raw signals of the two types of sensors are 0.6156 and 0.7780, respectively. the SC of MAV, ZC, SSC, WL, and MDF are 0.9708, 0.6740, 0.8023, 0.9663, and 0.9476, respectively. the ICC of MAV, ZC, SSC, WL, and MDF are 0.9670, 0.7340, 0.7910, 0.9540., and 0.8230, respectively. the results indicate a good agreement between the two systems and confirm the reliability of the wireless EMG sensor's design. the wireless EMG sensor can be further applied to real-time HRI and muscle fatigue assessment.

关键词： Wireless communication Wireless sensor networks Muscles Feature extraction Fatigue Electromyography Sensor systems Real-time systems Sensors Intelligent sensors

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Computation-Dependent Routing Based Low-Latency Decentralized Collaborative Computing Strategy for Satellite-Terrestrial Integrated Network

Computation-Dependent Routing Based Low-Latency Decentralize...

引用

international conference on Wireless communications and Signal Processing (WCSP)

作者： Buyun Ma Zhiyuan Ren Wei Guo Wenchi Cheng Hailin Zhang State Key Laboratory of Integrated Services Networks Xidian University Xi'an China China Satellite Communication Co. Ltd Beijing China

ISBN: (纸本)9781665450867

By jointly optimizing the computation offloading and routing, the Computation-Dependent Routing (CDR) can significantly reduce the task processing latency in Satellite-Terrestrial Integrated Network (STIN). However, existing CDR-related works mainly focus on the performance improvement in the central static environment while ignoring the dynamic decentralized environment of STIN. To support the latencysensitive tasks in STIN, in this paper, we propose a CDR based low-latency decentralized collaborative computing strategy (LOCS), in which a Directed Diffusion enhanced Task Scheduling algorithm (DETS) is proposed to achieve the computing while transmitting distributedly by designing a novel computing gradient that both considers the computing and communication resources. Moreover, to overcome the STIN dynamics, a cross time slot mechanism based on the Time Expanded Graph (TEG) model is introduced. the latency performance of LOCS is analyzed. Numerical results verify that the proposed LOCS performs stronger resilience compared with the central scheme.

关键词： Wireless communication Computational modeling Simulation Collaboration Signal processing algorithms Routing Topology

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Active Reconfigurable Intelligent Surface Aided communication with Partial CSI

Active Reconfigurable Intelligent Surface Aided Communicatio...

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international conference on Wireless communications and Signal Processing (WCSP)

作者： Gui Zhou Cunhua Pan Hong Ren School of Electronic Engineering and Computer Science at Queen Mary University of London U.K. National Mobile Communications Research Laboratory Southeast University China

ISBN: (纸本)9781665450867

Active reconfigurable intelligent surface (RIS) technique has recently been proposed to compensate for the severe “multiplicative fading” effect in the traditional passive RIS-aided systems. this work explores a practical issue in the active RIS-aided systems that system rate and RIS transmit power expressions need the knowledge of independent CSI of RIS reflection channels, however, which cannot be estimated due to the lack of signal processing ability of active RIS. Under this practical limitation, we exploit a rate outage constrained beamforming problem, which is solved by using the Bernstein-Type inequality (BTI) and semidefinite relaxation (SDR) techniques. Numerical results show that, compared with the scenario without RIS, active RIS can bring hundreds of times performance gain, while passive RIS can only improve ten to dozens of times performance gain.

关键词： Fading channels Wireless communication Array signal processing Simulation Signal processing algorithms Channel estimation Performance gain

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On the Uplink Performance of Multi-User MC-CDMA Satellite-Terrestrial Deliveries

On the Uplink Performance of Multi-User MC-CDMA Satellite-Te...

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international conference on Wireless communications and Signal Processing (WCSP)

作者： Yi Zhang Weihao Yan Tian Yuan Ping Yan Jinpeng Song Xiangyuan Bu Southwest China Institute of Electronic Technology Chengdu China School of Information and Electronics Beijing Institute of Technology Beijing China Sch. Cyberspace Sci. Tech. Beijing Institute of Technology Beijing China

ISBN: (纸本)9781665450867

Multi-carrier (MC)-code-division multiple-access (CDMA) is capable of offering some merits, e.g., spectral efficiency, high flexibility, and multiple access capabilities, because of the combination of the MC modulation and spread spectrum. then, it has already been regarded as a promising method for satellite communication systems to realize global broad coverage. By observing the fact that all related works only focus on the downlink transmission, this work presents a performance analysis model to show how the system parameters, e.g., the asynchronization of the clock and the frequency drifts among the multiple terrestrial users, influence the uplink transmission performance of satellite-terrestrial systems.

关键词： Wireless communication Analytical models Multicarrier code division multiple access Spectral efficiency Modulation Interference Downlink

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Secure Transmission of IRS-assisted A2G Multiuser communication System with Hardware Impairments

Secure Transmission of IRS-assisted A2G Multiuser Communicat...

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international conference on Wireless communications and Signal Processing (WCSP)

作者： Tianhao Cheng Buhong Wang Kunrui Cao Runze Dong Danyu Diao School of Information and Navigation Air Force Engineering University Xi'an China School of Information and Communications National University of Defense Technology Xi'an China State Key Laboratory of Integrated Service Networks Xidian University Xi'an China

ISBN: (纸本)9781665450867

this paper investigates secure communications in an intelligent reflective surface (IRS)-assisted air-to-ground (A2G) system with hardware impairments (HIs), where an unmanned aerial vehicle (UAV) serves as a base station for multiple ground users in the presence of a ground eavesdropper. We jointly optimize the transmit precoding (TPC) matrix and the IRS phase shift matrix to maximize the sum secrecy rate subject to the transmit power constraint and the IRS unit modulus constraint. the original problem is a non-convex problem that is very difficult to deal with. We solve this problem by alternating optimization (AO) algorithm. We decompose it into two subproblems, which are solved by successive convex approximation (SCA) and semi-definite relaxation (SDR) methods, and optimize these two subproblems alternately. Finally, simulation results reveal the impact of HIs on confidential communication and verify the effectiveness of our algorithm.

关键词： Wireless communication Simulation Signal processing algorithms Signal processing Autonomous aerial vehicles Approximation algorithms Hardware

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Dynamic Interference Prediction for In-X 6G Sub-networks

Dynamic Interference Prediction for In-X 6G Sub-Networks

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international ITG conference on Source and Channel Coding (SCC)

作者： Pramesh Gautam Ravi Sharan B A G Paolo Baracca Carsten Bockelmann thorsten Wild Armin Dekorsy Department of Communications Engineering University of Bremen Germany Nokia Bell Labs Stuttgart Germany Nokia Standards Munich Germany

ISBN: (数字)9798331522896

ISBN: (纸本)9798331522902

the sixth generation (6G) industrial Sub-networks (SNs) face several challenges in meeting extreme latency and reliability requirements in the order of 0.1 – 1 ms and 99.999-to-99.99999 percentile, respectively. Interference management (IM) plays an integral role in addressing these requirements, especially in ultra-dense SN environments with rapidly varying interference induced by channel characteristics, mobility and resource limitations. In general, IM can be achieved using resource allocation and accurate Link adaptation (LA). In this work, we focus on the latter, where we first model interference at SN devices using the spatially consistent 3GPP channel model. Following this, we present a discrete-time dynamic state space model (DSSM) at a SN access point (AP), where interference power values (IPVs) are modeled as latent variables incorporating underlying modeling errors as well as transmission/protocol delays. Necessary approximations are then presented to simplify the DSSM and to efficiently employ the extended Kalman filter (EKF) for interference prediction. Unlike baseline methods, our proposed approach predicts IPVs solely based on the channel quality indicator (CQI) reports available at the SN AP at every transmission time interval (TTI). Numerical results demonstrate that our proposed approach clearly outperforms the conventional baseline. Furthermore, we also show that despite predicting with limited information, our proposed approach consistently achieves a comparable performance w.r.t the off-the-shelf supervised learning based baseline.

关键词： 6G mobile communication Adaptation models Quantization (signal) Supervised learning Noise Interference Machine learning 3GPP Resource management Reliability

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Decentralized Control for Multi-agent Missions Based on Flocking Rules 14th

Decentralized Control for Multi-agent Missions Based on Floc...

引用

14th APCA international conference on Automatic Control and Soft Computing (CONTROLO)

作者： Ribeiro, Rafael Silvestre, Daniel Silvestre, Carlos Univ Lisbon Inst Super Tecn Lisbon Portugal Univ Macau Dept Elect & Comp Engn Fac Sci & Technol Macau Peoples R China Univ Lisbon Inst Syst & Robot Inst Super Tecn Lisbon Portugal

ISBN: (纸本)9783030586553;9783030586539;9783030586522

this paper addresses the problem of having a multi-agent system converging to multiple dynamic rendezvous areas for networks of agents with no localization sensors and limited communication capabilities. the localization is performed by measurement/communication towers that determine the noisy position and velocity of each relevant agent and transmit them using a directional antenna. there is no assumption on the connectedness of the network topology, which is unknown to all agents. the proposed solution consists of an improved flocking-based movement algorithm tailored to the proposed scenario, with mechanisms to prevent collisions. the performance of the solution is presented through multiple simulations for a multitude of environments. By an appropriate selection of an utility function, these empirical results hint to the possibility of realizing different types of missions intended for multi-agent systems using swarm behavior.

关键词： Decentralized control Multi-agent systems Flocking algorithms

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Design and implementation of an intelligent monitoring system for real-time tip-over assessment of mobile manipulator

Design and implementation of an intelligent monitoring syste...

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international conference on Humanoid, Nanotechnology, Information Technology, communication and Control, Environment and Management (HNICEM)

作者： Mark Lawrence D. Lupoy Jose Martin Z. Maningo Argel A. Bandala Ryan Rhay P. Vicerra Edwin Sybingco Gokongwei College of Engineering De La Salle University Manila Philippines

Mobile manipulators are commonly used for explosive ordnance disposal (EOD) missions. the typical operation of an EOD robot includes traversing inclines as well as a variety of rough terrains while carrying heavy payloads which may cause postural instabilities or tip-over. Mobile manipulator tip-over, especially while carrying payload, creates a dangerous situation for the surrounding environment resulting in an aborted mission. this study aims to create a real-time tip-over monitoring system that can be applied to avoid a mobile manipulator tip-over. Using a Computer Aided Design (CAD) model of the robot and parameters such as center of gravity and orientation, a measure for robot instability and a tip-over algorithm can be derived and evaluated to perform the necessary actions such as adjusting robot arm positions or changing velocity of the robot to prevent tip-over.

关键词： Solid modeling Heuristic algorithms Robot sensing systems Real-time systems Task analysis Robots Manipulator dynamics

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Density-Based Classification Network Control Approach for a Single Stoplight Traffic System on a Simplified Traffic Simulation using MATLAB

Density-Based Classification Network Control Approach for a ...

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international conference on Humanoid, Nanotechnology, Information Technology, communication and Control, Environment and Management (HNICEM)

作者： Janos Lance L. Tiberio John Anthony C. Jose Argel A. Bandala Department of Electronics and Computer Engineering De La Salle University Manila Philippines

A more dynamic method of improving traffic flow on a road network is made possible by intelligent traffic management systems (ITMS). this is done by determining the optimal routing configuration of a stoplight system to maximize vehicle throughput. One such algorithm is the classification network which uses a deep neural network to approximate a function that determines the optimal routing state by projecting it as a classification task. this paper uses a classification network-based control algorithm for a single smart traffic light module implemented through the MATLAB software. the proposed system was able to route vehicles 15.1% faster than a static system on a single intersection road network. the classification network control scheme was able to determine the best routing configuration for the stoplight system in real time to optimize traffic flow. thus, the system is a feasible improvement in stoplight control as it can reduce traffic congestion by increasing vehicle throughput in the system.

关键词： Roads Software algorithms Traffic control Routing throughput Approximation algorithms Real-time systems

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