UDP Network Communications for Wireless Control With Loop Coordination

2004 ◽  
Author(s):  
Paul A. Kawka ◽  
Nicholas J. Ploplys ◽  
Andrew G. Alleyne
Keyword(s):  
Closed Loop ◽  
Ad Hoc ◽  
Test Plant ◽  
Real Time Control ◽  
Loop Control ◽  
Communication Framework ◽  
Time Control ◽  
Wireless Control ◽  
Shared Goal ◽  
Communication Scheme

With the advent of Bluetooth and wireless 802.11 Ethernet protocols having transmission speeds up to 54 Mbps, wireless communication for closed-loop control is becoming more and more achievable. Some researchers have utilized Bluetooth networks for wireless control, resulting in successful stabilization of an unstable plant with a network controller. Previously, the authors of this paper developed a novel event-based control with time-based sensing and actuation communication method using 11 Mbps wireless Ethernet with the user datagram protocol (UDP). Near real-time control of an unstable Furuta pendulum with up to 250 Hz closed loop bandwidth was obtained using off the shelf hardware, Matlab, and Windows 2000 operating systems. The present work extends that communication scheme to two independent wireless loops that share a mutual goal, making additional communication between the two controllers advantageous. The communication framework for the coupled control in this ad hoc peer-to-peer network is presented along with some practical limitations. Data from a physical system implementing this framework demonstrates its effectiveness in application. The test plant couples a simple light tracking plant with a Furuta pendulum and a shared goal of maintaining line of sight (LOS) under normal conditions as well as reestablishing LOS in the case of lost contact due to sudden obstacles.

Research on Airbags Overturning Device due to the PID Closed-Loop Control Technology

2013 ◽  
Vol 313-314 ◽  
pp. 395-398
Author(s):  
De Qiang Zhang ◽  
Li Ying Su ◽  
Duo Xing Zhao
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Pressure Sensors ◽  
Pressure Control ◽  
Closed Loop Control ◽  
Control Technology ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Pressure Control System

Based on S7-200 PLC, pressure sensors and amplifiers, this paper uses PID instruction to establish the closed-loop pressure control system of the required thrust in turning airbags. So in the automatic overturning airbags, it is capable to real-time control the push rods running status.

scholarly journals Real-time Closed-loop Control in a Rodent Model of Medically Induced Coma Using Burst Suppression

2013 ◽  
Vol 119 (4) ◽  
pp. 848-860 ◽  
Author(s):  
ShiNung Ching ◽  
Max Y. Liberman ◽  
Jessica J. Chemali ◽  
M. Brandon Westover ◽  
Jonathan D. Kenny ◽  
...  
Keyword(s):  
Real Time ◽  
Delivery System ◽  
Closed Loop ◽  
Brain Injuries ◽  
Estimation Procedure ◽  
Burst Suppression ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Proportional Integral Controller

Abstract Background: A medically induced coma is an anesthetic state of profound brain inactivation created to treat status epilepticus and to provide cerebral protection after traumatic brain injuries. The authors hypothesized that a closed-loop anesthetic delivery system could automatically and precisely control the electroencephalogram state of burst suppression and efficiently maintain a medically induced coma. Methods: In six rats, the authors implemented a closed-loop anesthetic delivery system for propofol consisting of: a computer-controlled pump infusion, a two-compartment pharmacokinetics model defining propofol’s electroencephalogram effects, the burst-suppression probability algorithm to compute in real time from the electroencephalogram the brain’s burst-suppression state, an online parameter-estimation procedure and a proportional-integral controller. In the control experiment each rat was randomly assigned to one of the six burst-suppression probability target trajectories constructed by permuting the burst-suppression probability levels of 0.4, 0.65, and 0.9 with linear transitions between levels. Results: In each animal the controller maintained approximately 60 min of tight, real-time control of burst suppression by tracking each burst-suppression probability target level for 15 min and two between-level transitions for 5–10 min. The posterior probability that the closed-loop anesthetic delivery system was reliable across all levels was 0.94 (95% CI, 0.77–1.00; n = 18) and that the system was accurate across all levels was 1.00 (95% CI, 0.84–1.00; n = 18). Conclusion: The findings of this study establish the feasibility of using a closed-loop anesthetic delivery systems to achieve in real time reliable and accurate control of burst suppression in rodents and suggest a paradigm to precisely control medically induced coma in patients.

Research on Closed-Loop Control System Based on Image-Signal Processing of Furnace Flame

2012 ◽  
Vol 614-615 ◽  
pp. 1095-1100 ◽  
Author(s):  
Rong Bao Chen ◽  
Jing Ci Bian ◽  
Fang Hui Meng
Keyword(s):  
Signal Processing ◽  
Temperature Field ◽  
High Temperature ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Closed Loop Control System ◽  
Loop Control System

Through the furnace-flame image-signal processing for power plant, effective-temperature field proportions, high-temperature field proportions, centroid offset distances, and circular degrees in high-temperature field can be all obtained. What’s more, based on the above data and related signals collected by sensors such as flame detectors as a criterion, the Kohonen’s self-organizing neural network is introduced to distinguish the states of furnace flame. Therefore, the opening incremental adjustment is proposed to achieve real-time control of furnace flame.

A Kind of Environment Monitoring System Used for Aircraft Fire Training Simulator

2013 ◽  
Vol 760-762 ◽  
pp. 1250-1253
Author(s):  
Chun Guo Fei ◽  
Jin Long Zhang ◽  
Tian Hao Liu ◽  
Hai Zhong Xu
Keyword(s):  
Monitoring System ◽  
Pid Controller ◽  
Closed Loop ◽  
Real Time Control ◽  
Training Simulator ◽  
Training Environment ◽  
Time Control ◽  
Sensor Detection ◽  
Training Efficiency ◽  
Command Center

Aircraft fire training simulators are key facilities in airport used for firefighters to do firefighting trainings. In order to protect the safety of firefighters, the monitoring system should be applied to monitor the internal environment of the simulator. In accordance with the requirements of the training environment, a kind of monitoring system based on MCU and GPRS communication components are built. The parameterized PID controller, the sensor detection module, the fan and spray drive module are consisted of closed-loop to achieve real-time control and regulation on the smoke and temperature of the internal simulator. Using GPRS module, the internal scenes of the simulator are sent to the command center through the information transmission system. Based on the information transported from training site, command center can take the appropriate training programs to guide firefighters. Use this system, the training safety is ensured and the training efficiency is improved at the same time.

System Characterization and Plasma-Particle Distribution Analysis for Development of a Closed Loop Control for Plasma Spray

2000 ◽  
Author(s):  
M. Gevelber ◽  
D. Wroblewski ◽  
J. Fincke ◽  
W. D. Swank
Keyword(s):  
Plasma Spray ◽  
Spray Deposition ◽  
Distribution Analysis ◽  
Real Time Control ◽  
Critical System ◽  
Loop Control ◽  
Time Control ◽  
System Characterization ◽  
Advanced Control ◽  
And Performance

Abstract This paper investigates the need to develop an advanced control system for plasma spray deposition. The limitations and performance capability of both feed forward and real-time control are evaluated. Critical system characteristics for developing such controllers are experimentally identified including dominant nonlinearalities; dynamics, cross-coupling, distributions, and sensor issues.

Evaluation of a Low-Cost Microcontroller for Real-Time Control Education and Prototyping

2014 ◽  
Author(s):  
Ryan W. Krauss
Keyword(s):  
Feedback Control ◽  
Real Time ◽  
Closed Loop ◽  
Low Cost ◽  
Serial Communication ◽  
Real Time Control ◽  
Time Control ◽  
Active User ◽  
Bode Plots ◽  
Control Education

Arduino microcontrollers are popular, low-cost, easy-to-program, and have an active user community. This paper seeks to quantitatively assess whether or not Arduinos are a good fit for real-time feedback control experiments and controls education. Bode plots and serial echo tests are used to assess the use of Arduinos in two scenarios: a prototyping mode that involves bidirectional real-time serial communication with a PC and a hybrid mode that streams data in real-time over serial. The closed-loop performance with the Arduino is comparable to that of another more complicated and more expensive microcontroller for the plant considered. Some practical tips on using an Arduino for real-time feedback control are also given.

Design and Implementation of a Kind of Intelligent Electric Blanket Temperature Control System

2013 ◽  
Vol 432 ◽  
pp. 447-452
Author(s):  
Rong Li ◽  
Zhe Ming Duan ◽  
Wei Zhou ◽  
Bing Chao Dong
Keyword(s):  
Real Time ◽  
Temperature Control ◽  
Temperature Control System ◽  
Single Chip ◽  
Real Time Control ◽  
Loop Control ◽  
Relay Control ◽  
Time Control ◽  
Control Relay ◽  
Design And Manufacture

Temperature control is the key problem in the design and manufacture of electric blankets. In order to solve current technological failure to real-time control of the temperature of electric blanket, this paper applies technical means of DS18B20 temperature acquisition and relay control temperature heating, together with key circuit, display circuit as well as other auxiliary circuit, and the system achieved electric blanket working temperature real-time intelligent control. Relay output controlled the temperature closed loop control by single-chip microcomputer, and a new type of intelligent temperature control technology of electric blanket is developed, real-time temperature control is enhanced, which improved the security and energy conservation of electric blanket.

scholarly journals A closed-loop anesthetic delivery system for real-time control of burst suppression

2013 ◽  
Vol 10 (4) ◽  
pp. 046004 ◽  
Author(s):  
Max Y Liberman ◽  
ShiNung Ching ◽  
Jessica Chemali ◽  
Emery N Brown
Keyword(s):  
Real Time ◽  
Delivery System ◽  
Closed Loop ◽  
Burst Suppression ◽  
Real Time Control ◽  
Time Control

scholarly journals Some aspects of on-line computer control of a lathe

1979 ◽  
Author(s):  
Δημήτριος Πούλος
Keyword(s):  
Control Function ◽  
Low Cost ◽  
Computer Control ◽  
Spindle Motor ◽  
Electrical Circuit ◽  
Ball Screw ◽  
Real Time Control ◽  
Loop Control ◽  
Time Control ◽  
Circular Interpolation

A small lathe has been modified to work under microprocessor control to enhance the facilites which the lathe offers, and provide a wider operating range with relevant economic gains. As a result of these modifications the saddle motion is controlled by steppingmotors under closed-loop control giving better operating system characteristics as indicated below. An electrical circuit has been developed to monitor spindle torque and the mechanical link between the spindle motor and the screw has been replaced to give an " infinitely variable " gearbox, and this allows a variety of non-standard screws, helices and spirals to be manufactured. Software for the system includes control programs for implementation of the adaptive control function and monitoring of tool wear; linear and circular interpolation is implemented through the manipulation of Boolean functions, rather than by solving equations to optimise the performance of stepping motors when used for real-time control. Use o f low cost uncalibrated ball-screw s in conjunction with a calibration algorithm results in an overall accuracy better than the resolution of the system. It is concluded that it is practical to carry out a low-cost retrofit on existing machine tools to enhance their range of capabilities.

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