Robust Control Techniques Applied to the Hot-Dip Galvanizing Process

2013 ◽  
Vol 459 ◽  
pp. 212-221 ◽  
Author(s):  
G. Romero ◽  
A. Palacios ◽  
J. Rivera ◽  
I. Pérez ◽  
D. Lara ◽  
...  
Keyword(s):  
Control System ◽  
Time Delay ◽  
Stability Property ◽  
Steel Strip ◽  
Property A ◽  
Hurwitz Matrix ◽  
Loop Control ◽  
Loop Control System ◽  
The Stability ◽  
Close Loop Control

This paper presents new results to compute the time-delay margin of the hot-dip galvanizing control system. Compared to previous works on this issue, this paper considers a mathematical model of the plant with two inputs and one output. The inputs are used to regulate the output, which represents the Zinc mass coating of steel strip. To achieve this objective, a multivariable PI controller is used, this controller is tuned applying the well known Ziegler and Nichols method, and then the maximum time-delay is computed in order to guarantee the stability property of the close loop control system. The work bases its results on a transformation of the time-delay operator and it is performed in order to get a two variable polynomial; after this, to obtain the robust stability property, a result based on the Hurwitz matrix is applied.

scholarly journals The research of the pulse oxygen supply based on the fuzzy control technology

2018 ◽  
Vol 189 ◽  
pp. 06012
Author(s):  
Faling Hu ◽  
Tongfeng Niu ◽  
Jun Yao ◽  
Bingyan Cui ◽  
Haoxing Xu ◽  
...  
Keyword(s):  
Control System ◽  
Fuzzy Control ◽  
Open Loop ◽  
Open Loop Control ◽  
Loop Control ◽  
Fuzzy Control System ◽  
Loop Control System ◽  
Working Principle ◽  
The Stability ◽  
Close Loop Control

According to the working principle of pulse oxygen supplies, we analyze how to realize the control of the oxygen flow by double different valves. a two-dimensional fuzzy control system is proposed to solve the unstable problem, which is brought by the shortcomings of the open-loop control system. We add a new parameter, the rate of the differential pressure signal changes, which contributes to a close –loop control system and increases the stability of the system. The experiments and the data show that the fuzzy control system make the process of breathing much more comfortable and solve the hysteresis and overshoot caused by the open-loop control system. The product reliability has been greatly improved.

Responses and Optimization of a PID-Based Speed Regulating System of the Planetary Mixer

2011 ◽  
Vol 418-420 ◽  
pp. 1865-1868
Author(s):  
Ming Jin Yang ◽  
Xi Wen Li ◽  
Zhi Gang Wang ◽  
Tie Lin Shi
Keyword(s):  
Control System ◽  
Open Loop ◽  
Open Loop Control ◽  
Efficient Operation ◽  
Loop Control ◽  
Loop Control System ◽  
Response Optimization ◽  
Close Loop Control ◽  
Close Loop Control System

The performance of speed regulating is very important to the mixing process with safe, efficient operation and high quality of production. Strategies and practices of responses and optimization of a PID-based speed regulating system of a planetary mixer were presented in this paper. Research results show that: by means of the signal constraint function presented by Simulink Response Optimization, optimization PID parameters of the 2-DOF-PID controller can be obtained, and the response of close-loop control system has quite good performance of overshoot, response time, and stability compared with an open-loop control system.

Modeling and Simulation of Brushless DC Motor Adaptive Fuzzy PID Control System for Pure Electric Vehicle

2012 ◽  
Vol 466-467 ◽  
pp. 1339-1343 ◽  
Author(s):  
Shu Song ◽  
Ya Jun Zhang
Keyword(s):  
Control System ◽  
Linear Systems ◽  
Mathematic Model ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Loop Control ◽  
Adaptive Fuzzy ◽  
Loop Control System ◽  
Close Loop Control ◽  
Close Loop Control System

Pure Electric Vehicles (PEV) is an important research direction to solve the problems of auto environment and energy sources. Research double close-loop control system of PEV driven by Brushless Direct Current Motor (BLDCM) has the practical value. Traditional PID controllers have some advantages of being simple, reliable and effective for linear systems, but not for time-varying systems or highly non-linear systems. In order to improve the performances in both steady state and transient state of control system, an Adaptive Fuzzy PID Controller (AFPIDC) can be employed. The dynamic model of PEV and the mathematic model of BLDCM can be analyzed and established. Simulation model of Speed and Current Double Close-Loop Control System are implemented by Matlab7.0/simulink. The simulation results show that the system has rapid response, without static error and overshoot, good performance and strong robustness, high capacity of resisting disturbance.

A New Stabilizing Controller Design Based on the Wireless Networked Control System

2013 ◽  
Vol 331 ◽  
pp. 294-298
Author(s):  
Xiao Hua Guo
Keyword(s):  
Control System ◽  
Controller Design ◽  
Networked Control System ◽  
Network Control ◽  
Linear Matrix ◽  
Stabilizing Controller ◽  
Loop Control ◽  
Time Varying Delay ◽  
Loop Control System ◽  
Close Loop Control

In order to improve the performance of the network control system based on the wireless sensor networks, a multi-hopping wireless communication and their effect on network time-varying delay is analyzed, and a new stabilizing controller is proposed based on the a clientserver model in this paper. Using of the linear matrix inequality and switched control system theory to obtain the stabilizing conditions of the close loop control system and give the output feedback controller design approach. Preliminary experimentation indicates the rationality and effectiveness of the proposed control algorithm.

Energy Based Characterization of Fatigue Behaviour of Cyclically Unstable Materials

2009 ◽  
Vol 147-149 ◽  
pp. 512-517 ◽  
Author(s):  
Ewald Macha ◽  
Jacek Slowik ◽  
Roland Pawliczek
Keyword(s):  
Control System ◽  
Laboratory Tests ◽  
Fatigue Behaviour ◽  
Loop Control ◽  
New Energy ◽  
Loop Control System ◽  
Definition Of ◽  
Close Loop Control ◽  
Close Loop Control System

The paper presents a definition of a new energy based parameter which allows to better describe fatigue proprieties of materials, especially cyclically unstable materials in comparison with the Lagoda-Macha parameter. The proposed parameter distinguishes positive and negative work of external force and depends on the sign of the stresses in paths of strain in materials. It is used in laboratory tests for control of a fatigue process on hydraulic stand. A close-loop control system has been equipped with computer program based on MATLAB/Simulink module.

scholarly journals Aplikasi Filter KALMAN Pada Gerak Matra Longitudinal Pesawat Udara Boeing-747

2019 ◽  
Vol 23 (4) ◽  
pp. 362
Author(s):  
Sayuti Syamsuar
Keyword(s):  
Kalman Filter ◽  
Control System ◽  
Closed Loop ◽  
Flight Test ◽  
Loop Control ◽  
Output Response ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
The Stability ◽  
And Control

Many of aircraft perfonnance became from the stability and control of flight test data analysis. This paper introduces the Kalman Filter analysis on the Boeing 747 data aircraft to knawn the output response if disturbance (as turbulence or noise) absence on the closed loop control system. We found the output response of the plant on algorithm Kalman Filter tend to the unstable conditions, but we don't knaw the response of the whole of closed loop diagram block control system of Boeing 747 aircraft.Keywords : aircraft control system, turbulence, Kalman Filter

A New Reliability Analysis Method Based on Stability Reliability for Closed-Loop Control System

2012 ◽  
Vol 544 ◽  
pp. 115-120
Author(s):  
Xiao He Guo ◽  
Zong Xia Jiao ◽  
Shao Ping Wang
Keyword(s):  
Control System ◽  
Reliability Analysis ◽  
Closed Loop ◽  
Necessary Condition ◽  
Closed Loop Control ◽  
Analysis Method ◽  
Loop Control ◽  
Closed Loop Control System ◽  
Loop Control System ◽  
The Stability

Considering stability is the necessary condition for closed-loop control system to work properly, a new function reliability analysis method by inducting and defining the concept of stability reliability was proposed to describe the function reliability of closed-loop control system completely. As an example, the stability reliability calculation method and process to analyze the function reliability of a flight autopilot were demonstrated.

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