Decoupling Control for Unwinding Tension Control Systems

2012 ◽  
Vol 262 ◽  
pp. 367-371
Author(s):  
Min Bian ◽  
Mei Yang
Keyword(s):  
Control Systems ◽  
Strong Coupling ◽  
Control Process ◽  
Tension Control ◽  
Decoupling Control ◽  
Driver Model ◽  
Control Performance ◽  
Printing Quality ◽  
Simulation Results ◽  
And Control

During the printing process, invariable tension is very important to make sure the high printing quality. It’s well known that the relation of tension and tape velocity is strong-coupling based on the model of tension control, the modeling of tension possesses varies a lot in the control process, and various disturbances are inevitable during printing. All of these make the tension control systems unstable and affect the printing quality. This paper purposes a method to decrease the strong-coupling relation between speed and tension and control the speed-tension accurately. Based on the shaft-less printing press, the unwinding tension model and servo driver model are given. Decoupling controller is designed in this paper, and simulation results show that this method can improve the coupling degree and control performance.

Application of PID in Controllable Pitch Propeller of a Multipurpose Ocean Tug

2013 ◽  
Vol 464 ◽  
pp. 253-257
Author(s):  
Hui Fang Chen
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Automatic Control System ◽  
High Reliability ◽  
Control Process ◽  
Good Control ◽  
Control Performance ◽  
Hardware Configuration ◽  
Design Idea ◽  
And Control

This paper takes the automatic control system of controllable pitch propeller in a multipurpose ocean tug as an example to describe the application of the S7-200 series PLC in the control system of 4500 horse power controllable pitch propeller in detail. The principle of control system is addressed, as well as the hardware configuration, the design idea of the main software and control process. The system shows high reliability, accuracy and good control performance in practical in practical running.

Methodology for Wheelchair Design Based on Simulation Analyses

2021 ◽  
Author(s):  
Grzegorz Dobrzynski ◽  
Michal Abramowski
Keyword(s):  
Modeling And Simulation ◽  
Control Systems ◽  
Simulation Results ◽  
And Control

The article presents the stages of modeling and simulation of a new design of a wheelchair with the option of moving up and down stairs. These analyzes were aimed at the synthesis of the de-sign parameters and parameters of the sensor and control systems. The simulation results were verified by experimentally testing the prototype.

Study of Topology and Control Strategy of the Bidirectional Energy Storage Converter Based on Three-Level

2013 ◽  
Vol 397-400 ◽  
pp. 1169-1173
Author(s):  
Hong Wei Tang ◽  
Xi Kun Chen ◽  
Yan Xia Gao
Keyword(s):  
Mathematical Model ◽  
Energy Storage ◽  
Control Strategy ◽  
Lithium Battery ◽  
Decoupling Control ◽  
Midpoint Potential ◽  
Simulation Results ◽  
And Control ◽  
The Mathematical Model ◽  
Battery Module

To adapt to the requirements of the charging and discharging of the lithium battery, the paper presents a three-level based bidirectional energy storage converter topology.It has strong adaptability and can manage the charge and discharge of multi-series and parallel battery module. The mathematical model of the converter is analyzed, and the two operation modes of the converter control strategy are studied; Analysis the feed-forward decoupling control of three-level rectifier, and the variable scale factor is used to control midpoint potential. The simulation results demonstrate the feasibility of the design.

EFFECTS OF FORMAL PLANNING AND CONTROL ON GROWTH: A CASE STUDY APPROACH

1995 ◽  
Vol 03 (02) ◽  
pp. 161-195
Author(s):  
CLAUDIO A. ROMANO ◽  
JANEK RATNATUNGA
Keyword(s):  
Small Business ◽  
Control Systems ◽  
Small Firms ◽  
Firm Growth ◽  
Control Process ◽  
High Growth ◽  
Exploratory Research ◽  
Contextual Variables ◽  
Planning And Control ◽  
And Control

While planning and control and their impact on small firm growth are implicit in many academic discussions, much of our understanding of these phenomena are based on speculation and opinion. Thus, they seem neglected areas of small business research. This paper seeks to improve the understanding of formal planning and control systems and their relationship to the growth of small business in Australian manufacturing. First, a framework is developed which incorporates the main contextual variables which independently and simultaneously have been shown to have a major relationship with growth. Second, the study provides empirically-based qualitative evidence to further the understanding of causality in the growth of small business by focusing on how formal planning and control systems are embedded within the external or internal contextual variables of small business and the characteristics of their management. Evidence is also provided as to the conditions and circumstances under which formal planning and control are likely to be most effective in controlling the effects of contextual variables, and to the differences between high growth and low growth firms in the use of formal planning and control. The findings of this study are important for two principal reasons. First, it has provided the opportunity to conduct exploratory research into how a small business is managed within the context in which the processes are applied. Second, it has provided the opportunity to identify factors which encourage or discourage small firms to plan, thus providing a better understanding of the planning and control process adopted by small firms.

scholarly journals Conceptual solutions for control systems of differential tensioners for belt conveyors

2021 ◽  
Vol 7 (4) ◽  
pp. 316-327
Author(s):  
K.A. Goncharov ◽  
Keyword(s):  
Control System ◽  
Control Systems ◽  
Traction Force ◽  
Tension Control ◽  
Belt Conveyor ◽  
Load Carrying ◽  
New Type ◽  
Belt Conveyors ◽  
Tension Control System ◽  
And Control

Differential tensioning devices for belt conveyors in general and intermediate drives of extended conveyors in the form of closed traction loops are a new type of automatic tensioning devices that differ from other known designs by the presence of a stepwise discrete belt tension control system with separation of compensation functions for belt stretching under load and control of its tension during the operation of the conveyor in order to create optimal modes of belt loading. The article analyzes the well-known and practical concepts of belt conveyor control systems in general. The possibility of controlling the traction force realized by the intermediate belt drive by controlling the tension of the traction and load-carrying belts is shown. On the basis of the analysis, conceptual solutions for control systems for differential tensioning devices of belt conveyors are proposed with the possibility of both autonomous use and application in the structure of an integrated conveyor control system. Possible structures of linear parts of differential tensioning devices are presented, as well as options for the implementation of executive parts that directly move tensioning elements.

Information protection to prevent failures of elements of automated information and control systems of power facilities

2021 ◽  
Vol 94 ◽  
pp. 144-155
Author(s):  
E. P. Grabchak ◽  
◽  
E. L. Loginov ◽  
Keyword(s):  
Information Security ◽  
Control Systems ◽  
Power Supply ◽  
Information Exchange ◽  
Control Process ◽  
Reference Sequence ◽  
Security Threats ◽  
Power Equipment ◽  
Intelligent Methods ◽  
And Control

Introduction. One of the most important tasks in achieving reliability and safety of power supply as an element of ensuring technospheric security is the modernization of automated information and control systems for the transmitting and receiving sides, which ensures resistance against known types of attacks. The aim of the study is to solve the problem of secure information exchange within the framework of automated information and control systems, taking into account the low security of technological communication channels of power facilities to achieve the reliability and safety of power supply as an element of ensuring technospheric security based on the development of intelligent methods for detecting dangerous influences and intrusions to neutralize information security threats in relation to commands to control power equipment. Research methods. Within the framework of the study, general scientific and special methods of scientific knowledge were used, including analysis, synthesis, generalization, which were based on the main provisions and patterns of behavior of systems and information theory. Research results. It is proposed to create innovative algorithms for controlling power equipment, built on the basis of libraries of reference commands and reference sequences of commands used to replace commands intentionally or accidentally distorted by erroneous bits, as well as diagnosing vulnerabilities of information and control systems to ensure the correctness of the process of controlling power equipment. Conclusion. The listed technologies will make it possible to create a new class of efficient algorithms for power equipment control, built on the basis of intelligent methods for detecting dangerous influences and intrusions to neutralize information security threats in relation to control commands based on the analysis of high-level behavioral characteristics of the protected information and control system with the function of controlling the transition of the controlled system to the next a condition that depends on the exact correspondence of the generated commands to the reference commands and the reference sequence of commands, which will ensure the correctness of the control process of power equipment. Key words: energy, information and control networks, reliability, security, power supply, algorithms, monitoring, protection, information.

scholarly journals Control objects with variable transport delay

2021 ◽  
pp. 122-130
Author(s):  
Rafail Leonov ◽  
Keyword(s):  
Automatic Control ◽  
Control Systems ◽  
Control Process ◽  
Control Object ◽  
Smith Predictor ◽  
Transport Delay ◽  
Quality Improvement Research ◽  
Automatic Control Systems ◽  
Stability And Control ◽  
And Control

Research aim is to analyze a class of automatic control systems at mining and concentrating facilities, where controlling action is the consumption of fuel or substance by a transporting body in order to develop recommendations on stability and control quality improvement. Research methodology consists in working out a model of automatic control system and studying the infl uence of varying transportation delay on the model, which arises in the process of stabilizing the output value of the system of automatic control. The RMS error of output value control was measured on the system’s model when measuring the delay of the main controlling action. Discussion was carried out by the example of the control process where the output value of the control object is regulated by the conveyor which feeds the ore. It has been shown that when changing the controlling action (ore consumption), time the delivery time also changes at the same time. These facilities refer to the facilities with the varying parameter – delay in control; they are poorly explored. It has been shown that control systems like that cannot adequately operate in the general case. One of the main methods of improving the quality of such control systems is to use the Smith predictor. However, in this case the system of automatic control will operate adequately under constant parameters of the control object, which is highly unlikely in the conditions of mining treatment. Delay in such systems is defi nitely associated with the speed of material feed. It has been proposed to automatically change regulator’s settings depending on the speed of the conveyor. Material can be fed using an assembly with constant speed, as an alternative, while the consumption may be carried out in accordance with the variation of the control object output value by a separate feeder

Gyroscopic Coupling in Space Vehicle Attitude Control Systems

1962 ◽  
Vol 84 (1) ◽  
pp. 41-53 ◽  
Author(s):  
Robert H. Cannon
Keyword(s):  
Energy Consumption ◽  
Response Time ◽  
Control Systems ◽  
Strong Coupling ◽  
Attitude Control ◽  
Space Vehicle ◽  
Conventional System ◽  
Reduce Energy Consumption ◽  
Gyroscopic Coupling ◽  
And Control

The problem of controlling the attitude of a space vehicle is unusual in several respects. While the required precision may be extreme—less than 0.1 second of arc in certain cases—the required response time may often be very slow, measured in minutes or hours. Vehicles weighing tons may have to be controlled by inch-ounces of torque, and control energy is at an extreme premium. The present paper discusses the effects, on performance, of inter-axis coupling due to internal spinning parts. A de-coupling computer to nullify gyroscopic torque is described, and its utility is evaluated. The computer is found to improve precision, but to reduce energy consumption only in certain cases. It is shown that by postulating such a computer the performance of a given system may be accurately evaluated on the basis of much simpler single-axis relations, even though strong coupling is present. Specifically: (1) It is shown that the best available performance is established by postulating de-coupling control; and (2) a method is given for determining the amount by which a conventional system will fail to achieve that performance.

scholarly journals Joint Design of Transmission Rate and Control for Wireless Sensor Networked Control Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Jinna Li ◽  
Peng Zeng ◽  
Xuejun Zong ◽  
Meng Zheng ◽  
Xiaoling Zhang
Keyword(s):  
Control Systems ◽  
Networked Control Systems ◽  
Search Algorithm ◽  
Transmission Rate ◽  
Main Idea ◽  
Networked Control ◽  
Wireless Sensor ◽  
Control Performance ◽  
And Control ◽  
Event Triggered

This paper is concerned with transmission rate and control codesign of wireless sensor networked control systems (WSNCS) with time-varying delay. Jointly designing transmission rate and control is an attractive paradigm for WSNCS, since the control performance of WSNCS is highly sensitive to resource-constrained communication networks. The main idea of devised scheme is searching an optimal event-triggered transmission condition on the premise that wireless link capacity constraint is satisfied and stability of systems is guaranteed. The main aim of devised scheme is to greatly optimize control performance of WSNCS. First, two wireless network architectures characterized by multihop and star topology are put forward. Secondly, a model of WSNCS with event-triggered transmission mechanism is constructed. It is followed by stability analysis of WSNCS to obtain the asymptotical stability condition of systems. And then a search algorithm is presented for transmission rate and control codesign. Finally, numerical examples are given to illustrate the effectiveness of the proposed method.

Sign in / Sign up

Export Citation Format

Share Document