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.

Synchronous Control of Multi-Integrated System of Electro-Hydraulic with Mechanic Based on Virtual Axis Model

2011 ◽  
Vol 291-294 ◽  
pp. 3003-3008 ◽  
Author(s):  
Ji Dong Yang ◽  
Jian Qu Wu ◽  
Yong Quan Deng
Keyword(s):  
Control System ◽  
Control Model ◽  
Integrated System ◽  
Fluid Mechanic ◽  
Synchronous Control ◽  
Virtual Control ◽  
Acceleration Feedback ◽  
Hydraulic Cylinders ◽  
Set Up ◽  
Step Disturbance

The article gives a solution to the precise synchronous control of multi-hydraulic cylinders which exist in the large-sized pressure and flattening machine by the virtual axis method. To fulfill the job, the scheme introduces the acceleration feedback to the virtual control model to make the model practical. According to the Newton’s mechanical law and fluid mechanic, the article set up the model mentioned above. The control system presented is investigated through simulation of Matlab under step disturbance and productive practice which successfully demonstrate the effectiveness of the proposed control model.

Wireless Data Transmission Based on GPRS in Greenhouse Monitoring System

2013 ◽  
Vol 303-306 ◽  
pp. 2054-2057 ◽  
Author(s):  
Xiao Qian Hou ◽  
Xiang Dong Wang
Keyword(s):  
Data Transmission ◽  
Carbon Dioxide Concentration ◽  
Microcomputer System ◽  
Single Chip ◽  
Wireless Data ◽  
Single Chip Microcomputer ◽  
Wireless Data Transmission ◽  
Set Up ◽  
Sd Card ◽  
Wireless Module

This paper system based on GPRS and a single chip microcomputer. System is applied to facility agriculture. Work aims to realize the wireless data transmission. Using digital temperature sensors, humidity sensors and carbon dioxide concentration sensors, they could collect greenhouse related parameters data. After that, GPRS wireless module send these data to farmers' mobile phones and remote expert system. After system set up, practice has proved that farmers mobile phone can receive temperature data from ds18b20 temperature sensor and with no delay. Stored in SD card crop picture can transmit through GPRS model. In the picture size below 20 KB situation, delay is not obvious. Transmission effect is good.

PC Transceiver Programming in GPRS Wireless Transmission Module

2014 ◽  
Vol 945-949 ◽  
pp. 2217-2220
Author(s):  
Xing Hong Kuang ◽  
Zhe Yi Yao ◽  
Zhi Yu Wang ◽  
Jia Min Zhou ◽  
Jing Li ◽  
...  
Keyword(s):  
Data Transmission ◽  
Loss Rate ◽  
Visual Basic ◽  
Wireless Transmission ◽  
Third Party ◽  
Data Loss ◽  
Wireless Data ◽  
Server Side ◽  
Wireless Data Transmission

Based on UDP protocol in Visual Basic Winsock control, this paper designed third-party software to send and receive data. Wireless data transmission module used CM3160EP module. In order to decrease wireless data loss rate, four kinds of packets format is designed. The results show the stable data transmission and verify the send-receive and display of hexadecimal data on server-side.

Application of Wireless Data Transmission Technique in Drying Equipment

2011 ◽  
Vol 422 ◽  
pp. 262-267
Author(s):  
Zhi Wei Mai ◽  
Chang You Li ◽  
Ye Zhang ◽  
Feng Ying Xu ◽  
Jian Min Li
Keyword(s):  
Data Transmission ◽  
Detection System ◽  
Data Communication ◽  
Online Detection ◽  
Wireless Data ◽  
Wireless Data Transmission ◽  
Detection Technology ◽  
Grain Moisture ◽  
Grain Drying ◽  
And Control

The application of online detection technology for grain moisture is one of the most effective ways to improve the quality of grain drying. The online detection system for grain moisture consists of three parts: online remote module of ingoing grain moisture (charging), online remote module of outgoing grain moisture (discharging), and the host controller. It adopts JZ873 wireless transparent transmission module to realize the wireless data communication among various modules, and to formulate the communication drive. In practice, this system has characteristics such as flexible use, reliable data transmission, and it is more suitable for those testing and control conditions where it is inconvenient to wiring.

scholarly journals Synchronous control system based on wireless data transmission for 50,000-t heavy-haul trains

2018 ◽  
Vol 10 (7) ◽  
pp. 168781401878482 ◽  
Author(s):  
Shize Huang ◽  
Fan Zhang ◽  
Qiyi Guo ◽  
Decun Dong
Keyword(s):  
Control System ◽  
Wireless Data ◽  
Synchronous Control ◽  
Technical Requirements ◽  
Severe Accidents ◽  
Wireless Data Transmission ◽  
Heavy Haul Train ◽  
Heavy Haul ◽  
Brake Force ◽  
Heavy Haul Trains

In order to meet the ever-increasing freight capacity demand, operation of heavy-haul freight trains with a 50,000 t capacity has been widely studied for a decade in China. A typical heavy-haul train with a large capacity employs multiple locomotives that are evenly distributed along the train, and each locomotive, or two or more locomotives, hauls a certain amount of freight cars. The synchronicity among locomotives is of great importance to safety. A 50,000-t train developed in China will be pulled by 10 locomotives, and the uneven distribution of traction or brake force, caused by the asynchronous command execution of different locomotives, could eventually lead to severe accidents such as decoupling. This article focuses on how to apply the existing wireless-based multi-locomotive synchronous control system to the trains with the capacity of 50,000 t. The modular functionality of the control system is introduced, and some methods aiming to enhance the reliability of wireless communication are discussed. Then four experiments conducted on real trains or in laboratory are described. Test results show that the wireless synchronous control system can meet the technical requirements of 50,000-t trains and its operation is feasible.

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