Community Automatic Irrigation Control System Based on Zigbee

2013 ◽  
Vol 340 ◽  
pp. 587-591
Author(s):  
Jin Li ◽  
Dong Qi Han
Keyword(s):  
Control System ◽  
Data Transmission ◽  
Control Module ◽  
Irrigation Area ◽  
Distributed Structure ◽  
Regional Control ◽  
Control Node ◽  
Processing Module ◽  
Irrigation Control ◽  
Master Control

This paper designs a community automatic irrigation control system based on Zigbee aiming at the shortcomings of existing community plant irrigation and the characteristics of the community. The green space of the community is divided into a plurality of irrigation area, each irrigation area and main control module adopts distributed structure network, using TIs CC2530 as the core processor of Zigbee wireless micro processing module, realized reliable data transmission between the regional control node and the master control module. The experimental results show that the system realizes effectively automatic saving water irrigation, and it is economical and practical.

The Research of Field-Control Layer of Distributed Pipe Welding Control System

2014 ◽  
Vol 536-537 ◽  
pp. 1211-1214
Author(s):  
Sheng He ◽  
Hong Fu ◽  
Tian Yi Chen ◽  
Wei Wang
Keyword(s):  
Control System ◽  
Control Mode ◽  
Control Node ◽  
Design Structure ◽  
Pipe Welding ◽  
Field Management ◽  
Field Control ◽  
Wire Feeding ◽  
Control Layer ◽  
Master Control

The paper introduces the entirety design structure of distributed pipe welding control system. According to demand of pipe welding control, we design and achieve the DSP master control node of field-control layer. The DSP master control node is transplanted by DSP/BIOS operating system, and welding function modular is divided into several independent processes, which is controlled and scheduled. To enhance speed regulating scope and response time of rotation and wire feeding module of brush DC motor, we use feedforward-feedback control mode. Aim at particularity of pipe welding environment and variety of communication data type, the communication between field-management layer and field-control layer is CAN communication. We transplanted CAN-open protocol on it.

scholarly journals Robust Position Control of an Over-actuated Underwater Vehicle under Model Uncertainties and Ocean Current Effects Using Dynamic Sliding Mode Surface and Optimal Allocation Control

Sensors ◽  
2021 ◽  
Vol 21 (3) ◽  
pp. 747
Author(s):  
Mai The Vu ◽  
Tat-Hien Le ◽  
Ha Le Nhu Ngoc Thanh ◽  
Tuan-Tu Huynh ◽  
Mien Van ◽  
...  
Keyword(s):  
Control System ◽  
Motion Control ◽  
Optimal Allocation ◽  
Position Control ◽  
Sliding Mode ◽  
Underwater Vehicle ◽  
Ocean Current ◽  
Model Uncertainties ◽  
Control Module ◽  
Dynamic Sliding Mode

Underwater vehicles (UVs) are subjected to various environmental disturbances due to ocean currents, propulsion systems, and un-modeled disturbances. In practice, it is very challenging to design a control system to maintain UVs stayed at the desired static position permanently under these conditions. Therefore, in this study, a nonlinear dynamics and robust positioning control of the over-actuated autonomous underwater vehicle (AUV) under the effects of ocean current and model uncertainties are presented. First, a motion equation of the over-actuated AUV under the effects of ocean current disturbances is established, and a trajectory generation of the over-actuated AUV heading angle is constructed based on the line of sight (LOS) algorithm. Second, a dynamic positioning (DP) control system based on motion control and an allocation control is proposed. For this, motion control of the over-actuated AUV based on the dynamic sliding mode control (DSMC) theory is adopted to improve the system robustness under the effects of the ocean current and model uncertainties. In addition, the stability of the system is proved based on Lyapunov criteria. Then, using the generalized forces generated from the motion control module, two different methods for optimal allocation control module: the least square (LS) method and quadratic programming (QP) method are developed to distribute a proper thrust to each thruster of the over-actuated AUV. Simulation studies are conducted to examine the effectiveness and robustness of the proposed DP controller. The results show that the proposed DP controller using the QP algorithm provides higher stability with smaller steady-state error and stronger robustness.

Research on the Character of a Synchronous Control System with Wireless Data Communication

2010 ◽  
Vol 455 ◽  
pp. 206-210
Author(s):  
Jun Li Liu ◽  
Yan Yan Yan ◽  
G.Q. He
Keyword(s):  
Control System ◽  
Time Delay ◽  
Data Transmission ◽  
Data Communication ◽  
Control Model ◽  
Data Loss ◽  
Wireless Data ◽  
Synchronous Control ◽  
Wireless Data Transmission ◽  
Set Up

It discusses the reasons of the data transmission time delay and packets loss based on the theory of net data transmission. Aimed to the question of the time delay of data transmission and packets loss, the control system models are set up to analyze their influence to the performance of the control system. Based on the synchronous control model analysis with wireless data transmission, a method to control the system is reached with the state prediction when the communication error or data loss appears. It can control constantly when communication errors appear, and also it can get the most error period by numerical analysis.

A Master Control System for Nuclear Physics Instrument Systems

1966 ◽  
Vol 13 (1) ◽  
pp. 170-173 ◽  
Author(s):  
C. Vincent Phillips ◽  
Victor A. Otte ◽  
Russell P. Sullivan
Keyword(s):  
Control System ◽  
Nuclear Physics ◽  
Master Control

scholarly journals Selected Aspects of the Security of the Process Data Transmission in the Distributed Control System

2016 ◽  
Vol 37 (1) ◽  
pp. 231-252
Author(s):  
Marcin Bednarek ◽  
Tadeusz Dąbrowski ◽  
Tomasz Wawer
Keyword(s):  
Control System ◽  
Distributed Control ◽  
Data Transmission ◽  
Hash Function ◽  
Communication Process ◽  
Distributed Control System ◽  
Process Data ◽  
Process Diagnosis ◽  
Transmission Process

Abstract Communication between the process stations of the distributed control system is carried out. By the supervision and therapeutic systems of the stations communication process diagnosis is performed. Supervision and therapeutic systems are responsible for the security of transmitted data. The security is considered in this article mainly in the aspect of resistance to external destructive factors on the data transmission process. It is assumed that the transmission security can be provided by mechanisms protecting the integrity of the transmitted data. Correctness of the data is controlled by using one-way hash function calculated on the basis of the transmitted value variable and also is attached to the transmitted data. This allows to maintain the integrity of the transmitted process data. A solutions using one-way hash function to protection of the transmission before changing message contents (caused by eg. intruder interference) are proposed in the article.

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