A Research on Superheater Mechanism Model of Intelligent Optimization Based on Spot Data

2014 ◽  
Vol 986-987 ◽  
pp. 1019-1022
Author(s):  
Chang Liang Liu ◽  
Meng Ni
Keyword(s):  
Control Algorithms ◽  
Model Parameters ◽  
Mechanism Analysis ◽  
Nonlinear Parameters ◽  
Mechanism Model ◽  
Advanced Control ◽  
Reference Design ◽  
Object Of Study ◽  
Main Steam ◽  
Site Training

In order to solve the problems of strong coupling and nonlinear parameters of superheater model, in this paper, we aimed at a 600MW subcritical drum boiler high temperature superheater as the object of study .On the basis of mechanism analysis and its dynamic characteristics I built a dynamic model of high superheater contains 9 typical working conditions .I optimized the model parameters by using field data. A continuous nonlinear model is obtained by curve fitting. The simulation results show that superheater model built by this method can better simulate the field characteristic. This model provides a reference design of automatic control system of main steam temperature .This paper aims to provide the basis for the application of advanced control algorithms in the field. Furthermore, this model can provide higher accuracy for on-site training to improve training effect.

Comparison of Analytical and Empirical Models to Capture Variations in Off-Road Vehicle Dynamics

2005 ◽  
Author(s):  
Paul J. Pearson ◽  
David M. Bevly
Keyword(s):  
Empirical Data ◽  
Vehicle Dynamics ◽  
Experimental Validation ◽  
Inertial Sensors ◽  
Analytical Models ◽  
Control Algorithms ◽  
Model Parameters ◽  
Steering Control ◽  
Steering Angle ◽  
Yaw Rate

This paper develops two analytical models that describe the yaw dynamics of a farm tractor and can be used to design or improve steering control algorithms for the tractor. These models are verified against empirical data. The particular dynamics described are the motions from steering angle to yaw rate. A John Deere 8420 tractor, outfitted with inertial sensors and controlled through a PC-104 form factor computer, was used for experimental validation. Conditions including different implements at varying depths, as would normally be found on a farm, were tested. This paper presents the development of the analytical models, validates them against empirical data, and gives trends on how the model parameters change for different configurations.

Frequency Shaped Semi-Active Control for Magnetorheological Fluid-Based Vibration Control Systems

2013 ◽  
Author(s):  
Young-Tai Choi ◽  
Norman M. Wereley ◽  
Gregory J. Hiemenz
Keyword(s):  
Vibration Control ◽  
Control Systems ◽  
Active Control ◽  
Control Algorithm ◽  
Active Vibration Control ◽  
Control Algorithms ◽  
Model Parameters ◽  
Mr Fluid ◽  
Control Current ◽  
Active Vibration

Novel semi-active vibration controllers are developed in this study for magnetorheological (MR) fluid-based vibration control systems, including: (1) a band-pass frequency shaped semi-active control algorithm, (2) a narrow-band frequency shaped semi-active control algorithm. These semi-active vibration control algorithms designed without resorting to the implementation of an active vibration control algorithms upon which is superposed the energy dissipation constraint. These new Frequency Shaped Semi-active Control (FSSC) algorithms require neither an accurate damper (or actuator) model, nor system identification of damper model parameters for determining control current input. In the design procedure for the FSSC algorithms, the semi-active MR damper is not treated as an active force producing actuator, but rather is treated in the design process as a semi-active dissipative device. The control signal from the FSSC algorithms is a control current, and not a control force as is typically done for active controllers. In this study, two FSSC algorithms are formulated and performance of each is assessed via simulation. Performance of the FSSC vibration controllers is evaluated using a single-degree-of-freedom (DOF) MR fluid-based engine mount system. To better understand the control characteristics and advantages of the two FSSC algorithms, the vibration mitigation performance of a semi-active skyhook control algorithm, which is the classical semi-active controller used in base excitation problems, is compared to the two FSSC algorithms.

ASPECT - Advanced Control Algorithms on Industrial Controllers

2003 ◽  
Vol 36 (18) ◽  
pp. 89-93
Author(s):  
G. Dolanc ◽  
S. Gerkšič ◽  
J. Kocijan ◽  
S. Strmčnik ◽  
D. Vrančić ◽  
...  
Keyword(s):  
Control Algorithms ◽  
Advanced Control

ADVANCED CONTROL ALGORITHMS + SIMULINK COMPATIBILITY + REAL-TIME OS = REX

2005 ◽  
Vol 38 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Pavel Balda ◽  
MiloŜ Schlegel ◽  
Milan Ŝtêtina
Keyword(s):  
Real Time ◽  
Control Algorithms ◽  
Advanced Control

scholarly journals Ideal Current-voltage Characteristics and Rectification Performance of Molecular Rectifier under Single Level based Tunneling and Hopping Transport

2020 ◽  
Author(s):  
Xianneng Song ◽  
Xi Yu ◽  
Wenping Hu
Keyword(s):  
Experimental Results ◽  
Physical Parameters ◽  
Model Parameters ◽  
Mechanism Analysis ◽  
Hopping Transport ◽  
Molecular Diode ◽  
Current Voltage ◽  
Significant Difference ◽  
Molecular Rectification ◽  
And Performance

In this work, we systematically studied the rectifying properties of molecular junction based on asymmetric tunneling and hopping charge transport in a single electronic state model using Landauer formula and Marcus theory. We first analyzed the asymmetric I-V characteristics and revealed distinct physical origins of the rectification under the two types of transports. We found significant difference in I-V characteristics of the two and the hopping transport can afford a much higher rectification ratio than tunneling. Next, the effect of key physical parameters on rectification performance under tunneling and hopping, like asymmetric factor, energy barrier, temperature and molecule-electrode coupling et al, were extensively evaluated, which provided a theoretical baseline for molecular diode design and performance modulation. At last, we further analyzed representative experimental results using the two models. We successfully reproduced the experimental results by adjusting the model parameters and revealed the coexistence of the tunneling and hopping processes in the ferrocene based molecular diode. The model method thus can work as powerful tool in mechanism analysis for the molecular rectification study.

scholarly journals Gateway industrial ACL para Modbus TCP

2020 ◽  
pp. 158-166
Author(s):  
Rodrigo Aristóteles ◽  
Tarcisio Leão
Keyword(s):  
Communication System ◽  
Robotic Manipulator ◽  
Industrial Processes ◽  
Industrial Plant ◽  
Control Language ◽  
Automation Systems ◽  
Advanced Control ◽  
Production Stages ◽  
Object Of Study ◽  
And Control

Most industrial processes have computers responsible for managing the production stages, which are the workstations. They monitor and control equipment (frequency inverters, screwdrivers and others) by sending commands via the network. This article shows a communication system between a robotic manipulator and a workstation, Modbus TCP and Advanced Control Language (ACL) protocols, respectively. The devices mentioned do not communicate directly, as the communication protocols are different. Therefore, it is not possible to perform this integration between the equipment, causing a sector of the industrial plant to be inoperative. There are several similar problems in automation systems, so there is the use of the gateway in various processes. It is a technology used in the conversion between protocols, thus being the object of study. The methodology starts with configuring the gateway according to the parameters of the workstation and the robotic manipulator, and then employs the use of the Wireshark® network monitor in order to verify that data sent and received follow the requested specifications.

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