scholarly journals Advanced Fan Controller Using Atmega 1284P

2018 ◽  
Vol 18 (2) ◽  
pp. 43-47
Author(s):  
F.G. Apostol ◽  
G. Predusca
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Source Code ◽  
Manual Control ◽  
The Internet ◽  
Operating Parameters ◽  
Monitoring And Control ◽  
Mode Of Operation ◽  
Maximum Temperatures ◽  
And Control

AbstractThe project aims at creating a monitoring and control circuit in a desktop or complex system with the possibility to set the operating parameters. The project allows automatic and manual control of a certain number of fans using Pulse Width Modulation (PWM) control by the user or automatically by the system monitoring thresholds of minimum and average temperatures (also set by the user within the code). The system was designed with the following options: audible and visual alert when reaching maximum temperatures; time display, PWM percentage and three temperatures shown on a 16x2 LCD; the system-acquired data is then transmitted to a website. Additional features include the possibility of setting a color inside the system, also used as an alert as well as a color adjustment function by sound (for a musical lightshow). The mode of operation is based on the source code written in the Arduino IDE 1.6.3 software with the help of free libraries and free codes provided on the internet.

scholarly journals DIGITAL AND PULSE-WIDTH CONTROL OF A SPACE ROBOT WHEN APPROACHING A GEOSTATIONARY SATELLITE

2020 ◽  
Vol 22 (5) ◽  
pp. 74-78
Author(s):  
Ye.I. Somov ◽  
◽  
S.A. Butyrin ◽  
S.Ye. Somov ◽  
◽  
...  
Keyword(s):  
Pulse Width ◽  
Electric Propulsion ◽  
Pulse Width Modulation ◽  
Geostationary Satellite ◽  
Space Robot ◽  
Control Algorithms ◽  
Control Problems ◽  
Guidance And Control ◽  
Gyroscopic Moment ◽  
And Control

The control problems on a space robot during its approach to an information geostationary satellite are considered. The robot motion control system uses an electric propulsion system with 8 engines at the pulse-width modulation of their thrust values and a gyroscopic moment cluster based on 4 gyrodines with digital control. Numerical results are presented that demonstrate the effectiveness of the developed discrete guidance and control algorithms.

Study on Facilities Agriculture Remote Monitor and Control System Based on Tri-Networks Convergence

2014 ◽  
Vol 1073-1076 ◽  
pp. 1875-1878
Author(s):  
Li Juan Shi ◽  
Xiu Xia Yu ◽  
Jian Zhao ◽  
Qin Sheng Du
Keyword(s):  
Radio Frequency ◽  
Real Time ◽  
Internet Technology ◽  
The Internet ◽  
Monitoring And Control ◽  
Remote Transmission ◽  
Control Information ◽  
3G Network ◽  
Remote Controller ◽  
And Control

Facility agriculture environment monitoring system of the existing main adopts the wired communication technology, such as serial bus technology and field bus technology for communication. This system has the advantages of good interoperability, strong anti-interference ability, but the poor stability, low reliability, difficult to deploy, installation and maintenance costs high, which greatly limits its application in the design of facilities agriculture field. Three nets fusion refers to the 3G, RFID and Internet combination. In this paper, the 3G network, wireless radio frequency technology and Internet technology combining, in order to solve the above problems, the use of 3G network and the Internet to a large amount of data real-time remote transmission, using radio frequency network RFID technology through the short distance wireless data transmission terminal sensors to collect information, these information in time through the3G network and the Internet are transmitted to the the remote controller. The remote controller sends according to terminal sensor control information, through the 3G network and the Internet will control information is transmitted to the radio frequency network, wireless RF network through wireless communication control information is transmitted to the terminal controller, the final completion of the remote monitoring and control of agricultural facilities. The experimental results show that, the system can meet the real-time and can perform remote transmission for large data, provide the technical basis of visual audio data monitoring information transmission for agricultural facilities.

scholarly journals Smart Monitoring and Control in the Future Internet of Things

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 27
Author(s):  
Franco Cicirelli ◽  
Antonio Guerrieri ◽  
Andrea Vinci
Keyword(s):  
Quality Of Life ◽  
Internet Of Things ◽  
Future Internet ◽  
The Internet ◽  
Monitoring And Control ◽  
The Future ◽  
And Control ◽  
The Internet Of Things

The Internet of Things (IoT) and related technologies are promising in terms of realizing pervasive and smart applications, which, in turn, have the potential to improve the quality of life of people living in a connected world [...]

scholarly journals Independent PRF Generation and Control for Frequency Phase Calibration on Mono-pulse Radar at a Remote Location

2021 ◽  
Vol 24 (4) ◽  
pp. 368-373
Author(s):  
Jaewon Yang ◽  
Seungoh Yoo ◽  
Jaehyuk Yoon ◽  
Dongju Lee
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Pulse Repetition Frequency ◽  
Average Frequency ◽  
Precision Control ◽  
Remote Location ◽  
Pulse Radar ◽  
Phase Calibration ◽  
And Control ◽  
Frequency Phase

This paper presents a method of independent pulse repetition frequency(PRF) generation and control for frequency phase calibration on mono-pulse radar at a remote location. In order to generate an independent PRF signal of 320[Hz], pulse width modulation(PWM) of 16-bit timer/counter was applied. For a precision control of PRF signal, 16-bit timer/counter interrupt was changed for each period. Therefore, average frequency of PRF could be controlled by 0.0001[Hz]. To calibrate a frequency phase of mono-pulse radar at a remote location, the proposed PRF generator with a precision control of frequency was used regardless of receiving PRF signal from a radar. For the verification of the proposed PRF generator, theoretical analysis and experimental results are included.

scholarly journals Investigation of Greenhouse Monitoring and Control System

2021 ◽  
Vol 6 (1) ◽  
pp. 54-62
Author(s):  
Tetiana Sahaidak ◽  
◽  
Nataliia Huzynets
Keyword(s):  
Control System ◽  
Comparative Analysis ◽  
Selection Criteria ◽  
Necessary Conditions ◽  
Climatic Conditions ◽  
The Internet ◽  
Monitoring And Control ◽  
Monitoring And Control System ◽  
And Control ◽  
The Internet Of Things

Unsuitable climatic conditions, various natural disasters and instability and unpredictability of the weather significantly complicate cultivation, and sometimes make it even impossible. To ensure the best conditions for cultivation and the highest yields, farmers began to use greenhouses. However, in our hectic lives, people are constantly busy with something and there is no enough time. Long trips, business trips, vacations are also possible. It is becoming increasingly difficult to provide the necessary conditions for plants to grow on their own. That is why the Internet of Things has been so successfully integrated with agriculture that it has led to the emergence of automated or intelligent greenhouses. The article attempts to analyze the types of greenhouse monitoring and control system, their technical characteristics, principles of operation and basic requirements for these systems. According to the results of the study, the best smart greenhouses have been selected. The main functions of automated greenhouses have been described. Selection criteria have been determined and a comparative analysis of the most popular products available on the market.

scholarly journals Fault-Tolerant Temperature Control Algorithm for IoT Networks in Smart Buildings

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3430 ◽  
Author(s):  
Roberto Casado-Vara ◽  
Zita Vale ◽  
Javier Prieto ◽  
Juan Corchado
Keyword(s):  
Internet Of Things ◽  
Continuous Time ◽  
Control Algorithm ◽  
Fault Tolerant ◽  
The Internet ◽  
Monitoring And Control ◽  
Network Nodes ◽  
Reliable Monitoring ◽  
And Control ◽  
The Internet Of Things

The monitoring of the Internet of things networks depends to a great extent on the availability and correct functioning of all the network nodes that collect data. This network nodes all of which must correctly satisfy their purpose to ensure the efficiency and high quality of monitoring and control of the internet of things networks. This paper focuses on the problem of fault-tolerant maintenance of a networked environment in the domain of the internet of things. Based on continuous-time Markov chains, together with a cooperative control algorithm, a novel feedback model-based predictive hybrid control algorithm is proposed to improve the maintenance and reliability of the internet of things network. Virtual sensors are substituted for the sensors that the algorithm predicts will not function properly in future time intervals; this allows for maintaining reliable monitoring and control of the internet of things network. In this way, the internet of things network improves its robustness since our fault tolerant control algorithm finds the malfunction nodes that are collecting incorrect data and self-correct this issue replacing malfunctioning sensors with new ones. In addition, the proposed model is capable of optimising sensor positioning. As a result, data collection from the environment can be kept stable. The developed continuous-time control model is applied to guarantee reliable monitoring and control of temperature in a smart supermarket. Finally, the efficiency of the presented approach is verified with the results obtained in the conducted case study.

Principle and control strategy of pulse width modulation rectifier for hydraulic power generation system

2019 ◽  
Vol 135 ◽  
pp. 1200-1206 ◽  
Author(s):  
Kunlin Wang ◽  
Songwei Sheng ◽  
Yaqun Zhang ◽  
Yin Ye ◽  
Jiaqiang Jiang ◽  
...  
Keyword(s):  
Power Generation ◽  
Control Strategy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Generation System ◽  
Hydraulic Power ◽  
Power Generation System ◽  
And Control

scholarly journals THE MONITORING AND CONTROL OF AN ARM CRANK SYSTEM USING FUZZY LOGIC FOR MULTI-HANDICAPPED YOUTHS WITH MENTAL RETARDATION

2002 ◽  
Vol 14 (05) ◽  
pp. 197-203
Author(s):  
JIANN-SHING SHIEH ◽  
JEN-TSANG HUNG
Keyword(s):  
Fuzzy Logic ◽  
Mental Retardation ◽  
Fuzzy Logic Controller ◽  
Physical Therapist ◽  
Rotation Velocity ◽  
Manual Control ◽  
Control Group ◽  
Monitoring And Control ◽  
Significant Difference ◽  
And Control

In this paper, we try to cope with National Special School in Taoyuan in order to fit the special requirements for multi-handicapped youths with mental retardation using current high technology, such as microcomputer control, sensing technology, and fuzzy logic control. The prototype device of this paper is focused on designing an arm crank system using a fuzzy logic controller (FLC) to exercise for the upper limb. The rotation velocity of this system was controlled via adjusting the electric current of the brake in order to increase the training motivation. Hence, a FLC was designed into this system in comparison with a manual control by an expert (i.e., physical therapist). Fifteen multi-handicapped youth with mental retardation were treated using the manual control as a control group, and another fifteen youths were treated using FLC as an experimental group. The root mean square deviation (RMSD) of the change of rotation velocity of arm crank was no significant difference (p > 0.05) using Student t test analysis. It means that FLC can be replaced the manual control by the qualified physical therapist. Therefore, it can be seen as a demonstration of feasibility of the applicability of this FLC for monitoring and control the velocity of the arm crank. But, it still needs a longer series of multi-handicapped youths with mental retardation, perhaps to refine the rule-bases, and certainly to see how widely they are applicable.

Sign in / Sign up

Export Citation Format

Share Document