Position Precise Control System of Ball Head Pin Riveting Machine’s Axis

2012 ◽  
pp. 651-657
Author(s):  
Zhenhua Wang ◽  
Chenjin ◽  
Xiaohang Liu ◽  
Caiping Liang
Keyword(s):  
Control System ◽  
Precise Control

Maintaining Low Exhaust Emissions With Turbocharged Gas Engines Using a Feedback Air–Fuel Ratio Control System

1987 ◽  
Vol 109 (4) ◽  
pp. 487-490 ◽  
Author(s):  
D. W. Eckard ◽  
J. V. Serve´
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Exhaust Emissions ◽  
Ambient Conditions ◽  
Load Range ◽  
Heating Value ◽  
Gas Engine ◽  
Precise Control ◽  
Natural Gas Engine ◽  
Fuel Ratio

Maintaining low exhaust emissions on a turbocharged, natural gas engine through the speed and load range requires precise control of the air–fuel ratio. Changes in ambient conditions or fuel heating value will cause the air–fuel ratio to change substantially. By combining air–gas pressure with preturbine temperature control, the air–fuel ratio can be maintained regardless of changes in the ambient conditions or the fuel’s heating value. Design conditions and operating results are presented for an air–fuel controller for a turbocharged engine.

Design of Distributed Control System of Liquid Fermentation Based on S7-300 PLC and WinCC

2014 ◽  
Vol 651-653 ◽  
pp. 697-702
Author(s):  
Wei Zhang ◽  
Xuan Li ◽  
Fang Yang ◽  
Jiao Jiao Wang
Keyword(s):  
Control System ◽  
Distributed Control ◽  
Frequency Control ◽  
Distributed Control System ◽  
Precise Control ◽  
Liquid Fermentation ◽  
Computer Based ◽  
Fermentation Parameters ◽  
A Company ◽  
Control Accuracy

In order to improve the automation level for the control system of liquid fermentation of a company in Hubei province, and combine with the requirements of the company, a distributed control system of liquid fermentation is designed. The control system is composed of host computer based on WinCC, and the slave computer is S7-300 PLC of SIEMENS. The fermentation parameters, including rotation speed, temperature, pH, DO, O2, CO2, can be real-time online collected, and realize the frequency control of motor and precise control of temperature. The experiment result shows that the system runs stably and credibly, the parameters can be collected accurately and the temperature control accuracy has been achieved to be ±0.1°C.

Development of Low-Cost Wearable Servo Valve Using Buckled Tube Driven by Servo Motor

2013 ◽  
Vol 393 ◽  
pp. 532-537 ◽  
Author(s):  
Abdul Nasir ◽  
Tetsuya Akagi ◽  
Shujiro Dohta ◽  
Ayumu Ono ◽  
Yusuke Masago
Keyword(s):  
Control System ◽  
Flow Rate ◽  
Position Control ◽  
Low Cost ◽  
Control Valve ◽  
Artificial Muscle ◽  
Pneumatic Actuators ◽  
Servo Valve ◽  
Precise Control ◽  
Care Systems

Recently, power assisted nursing care systems have received much attention and those researches have been done actively. In such a control system, an actuator and a control valve are mounted on the human body. Designing the system, the size and weight of the valve become serious concerns. The purpose of our study is to develop a small-sized, lightweight and low-cost servo valve for precise control using wearable pneumatic actuators. In this study, a low-cost wearable servo valve that can control the output flow rate by changing the twisted angle of the buckled tube in the servo valve is proposed and tested. The position control system of McKibben rubber artificial muscle using tested valve and embedded controller is also proposed and tested. As a result, we confirmed that the tested servo valve can control the flow rate in both supply and exhaust in an analog way. In addition, the estimated cost of the proposed valve can be reduced about 100 times cheaper (10 US Dollar) compared with the typical servo valve.

Design and Experimental Study of Deposition Temperature Control System in Ultra-High Vacuum

2012 ◽  
Vol 571 ◽  
pp. 564-568
Author(s):  
Zhi Dan Yan ◽  
Li Dong Sun ◽  
Chun Guang Hu ◽  
Xiao Tang Hu ◽  
Peter Zeppenfeld
Keyword(s):  
Control System ◽  
Temperature Control ◽  
Deposition Temperature ◽  
Film Growth ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Temperature Control System ◽  
Growth Morphology ◽  
Precise Control ◽  
Key Factor

Deposition temperature is a key factor influencing the growth morphology of thin-films, aiming at this phenomenon, a precise control system of deposition temperature in ultra-high vacuum is developed in the paper. It can realize accurate temperature control in a range of 150K to 450K during experiment by combination of resistance heating up and liquid helium cooling down strategies, which is benefit to further understand the temperature-depended mechanism of organic molecule thin-film growth. Besides, it is experimentally studied that the growth morphology of p-6p molecules on a mica substrate is closely related to the substrate deposition temperature, indicating that the length of p-6p nano-fibers is proportional to the deposition temperature, while their distribution density is inversely proportional to the temperature.

The Application of Fuzzy Control in the Foam Fire Extinguishing System

2012 ◽  
Vol 246-247 ◽  
pp. 893-897
Author(s):  
Ke Ming Lv ◽  
Meng You Huo ◽  
Fang Yi Li
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Control Algorithm ◽  
Control Parameters ◽  
Fuzzy Control System ◽  
Precise Control ◽  
Fire Extinguishing ◽  
Control Rules ◽  
Fuzzy Control Algorithm ◽  
Fire Extinguishing System

In order to achieve the precise control of the compressed air foam proportioning on the fire engines, in this paper, the PIC microcontroller and the fuzzy control algorithm are used to design the microcontroller-based foam proportioning hybrid fuzzy control system. Taking into account the system cost and ease, we use the software to implement the fuzzy control of DC motor. The controller learns from the experience of skilled operators, and forms fuzzy control rules, finally we identify a number of important control parameters in this paper. The experimental results show that the fuzzy control system can achieve precise control of the mixing ratio

Safety analysis of the optionally-piloted airplane landing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jacek Pieniazek ◽  
Piotr Ciecinski
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
Threat Detection ◽  
Flight Tests ◽  
Content Type ◽  
Precise Control ◽  
Additional Information ◽  
Safety Risks

Purpose This study aims to optionally-piloted aircraft is useful for in-flight tests of new automatic controller’s concepts. The safety of this kind of experiment is an issue addressed in this paper. The prediction of possible safety-influencing factors makes it possible to assess the pilot’s ability to effectively prevent safety risks. Design/methodology/approach The analysis in this research paper focusses on two cases of monitoring; similar control standards for both pilot in command and the monitoring pilot or technical systems in one of these tasks and dissimilar control standard when monitoring pilot is not familiar with a control manner of the pilot in command or of the automatic control system. The increased workload is expected in the last case as the result of additional activities determined theoretically in the presented analysis. Details of the possible threats are obtained by simulation tests with various factors influencing the safety of landing. In addition to determining threats, the analysis includes the possibility of in time threat detection and preserving action. Findings The results show that the safety pilot has a different task than the pilot in command and needs to be familiar with the general principles of automatic controller operations and the particular algorithm being tested. Although commonly used landing procedure is relatively error-tolerant, new landing procedures for use in some specific conditions need more precise control and additional safety pilot preparation. Additional information presented to both the pilot in command and the safety pilot may increase mode and state awareness and reduce reaction time in an emergency condition. Practical implications In-flight tests of non-standard control algorithms there is a need to include additional preparation of the equipment and safety pilot. The research in this paper illustrates how to determine threats and safety-critical moments during the experimental flight can be observed. The danger is mitigated by the safety pilot, if familiar with both proper and improper operations of the controller and how the pilot in command should detect and predict danger caused by the tested control system. Originality/value The presented method of analysis combines the human factor with various technical aspects. The results obtained illustrate the real tasks of the person supervising the operation of the automatic control system and the role of a human as a safety pilot.

Machine vision and feedback control system allow the precise control of vascular deformationin vitro

2006 ◽  
Vol 77 (6) ◽  
pp. 064304 ◽  
Author(s):  
Jie Xu ◽  
Xiaolin Zhou ◽  
Haiyan Ge ◽  
Daping Yang ◽  
Tiefang Guo
Keyword(s):  
Control System ◽  
Feedback Control ◽  
Machine Vision ◽  
Feedback Control System ◽  
Precise Control

The PID Flow Control System Based on PLC

2015 ◽  
Vol 740 ◽  
pp. 289-292
Author(s):  
Chun Yan Sun ◽  
Bao Yi Fang
Keyword(s):  
Control System ◽  
Flow Control ◽  
Volume Control ◽  
Nonlinear Characteristics ◽  
Precise Control ◽  
Simulation And Optimization ◽  
Pid Algorithm ◽  
Flow Control System ◽  
Temperature Liquid ◽  
Electromagnetic Flow Meter

According to the time-varying and nonlinear characteristics of fluid, this paper puts forward a design scheme of real-time and accurate control of the liquid flow. The control system which taking the programmable logic controller (PLC) as the platform and using the PID control algorithm is composed with the touch screen, electromagnetic flow meter, temperature sensor, electric regulating valve system and so on. And the PID algorithm based on PLC design has carried on the analysis, simulation and optimization. The results show that PID algorithm is designed using this method with a strong and more precise control of the scheme. It is not only suitable for the flow control, changes in action after the equipment is also applicable to analog volume control temperature, liquid level, velocity, height etc.

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