scholarly journals Advanced control and design methods of the auxiliary resonant commutated pole inverter

2015 ◽  
Vol 63 (2) ◽  
pp. 489-494 ◽  
Author(s):  
S. Karyś
Keyword(s):  
Power Loss ◽  
Control Method ◽  
Design Methods ◽  
Control Methods ◽  
Power Transistors ◽  
Advantages And Disadvantages ◽  
Advanced Control ◽  
And Control

Abstract This paper presents several methods that enable the reduction of power loss in the auxiliary resonant commutated pole inverter - ARCP. Presented methods can be divided into static and dynamic ones. The static methods are related to an appropriate design of the inverter, whereas dynamic ones to advanced control of the power transistors. A variety of design and control methods are presented together with their advantages and disadvantages. The new control method of the current in the resonant branch is described. The main benefits of the proposed extended control method and their constrains are shown

Modelling and control of manipulators with flexible links working on land and underwater environments

Robotica ◽  
2010 ◽  
Vol 29 (3) ◽  
pp. 461-470 ◽  
Author(s):  
Levent Gümüşel ◽  
Nurhan Gürsel Özmen
Keyword(s):  
Fuzzy Control ◽  
Control Method ◽  
Robot Manipulator ◽  
Control Methods ◽  
Control Laws ◽  
Linear Ordinary Differential Equations ◽  
Intelligent Technique ◽  
Wide Range ◽  
Classical Control ◽  
And Control

SUMMARYIn this study, modelling and control of a two-link robot manipulator whose first link is rigid and the second one is flexible is considered for both land and underwater conditions. Governing equations of the systems are derived from Hamilton's Principle and differential eigenvalue problem. A computer program is developed to solve non-linear ordinary differential equations defining the system dynamics by using Runge–Kutta algorithm. The response of the system is evaluated and compared by applying classical control methods; proportional control and proportional + derivative (PD) control and an intelligent technique; integral augmented fuzzy control method. Modelling of drag torques applied to the manipulators moving horizontally under the water is presented. The study confirmed the success of the proposed integral augmented fuzzy control laws as well as classical control methods to drive flexible robots in a wide range of working envelope without overshoot compared to the classical controls.

scholarly journals Birth Control: A Review of Pharmacological and Non-pharmacological Modalities, Associated Pros and Cons, and Their Effectiveness

2021 ◽  
pp. 225-232
Author(s):  
Maryam Fairag ◽  
Malak ALGhamdi ◽  
Abdulaziz Baghlaf ◽  
Bader Alallah ◽  
Turki Alharbi ◽  
...  
Keyword(s):  
Family Planning ◽  
Birth Control ◽  
Control Method ◽  
Hormonal Contraception ◽  
Multiple Birth ◽  
Control Methods ◽  
Contraceptive Methods ◽  
Advantages And Disadvantages ◽  
Pros And Cons ◽  
Combined Hormonal Contraception

Introduction: Family planning importance is increasing progressively and is regarded as an essential part in every couple’s life. Family planning has a lot of benefits for the whole family as it provides a better control over the period between each pregnancy leading to a better balance over the personal, financial, and societal life. There are multiple birth control methods, from which couples can choose from with the assistance of their physicians since each method has its own advantages and disadvantages. Furthermore, some contraceptive methods may be more suited for a certain couple or situation than another one. This review of current methods aims to shed the lights on the various contraception options along with their advantages and disadvantages to aid providers in taking care of their patients. Methodology: A thorough search was carried out on PubMed using the most suitable keywords representing the aim of the present study. A total of 120 were found and based on whether they are suited to achieve the aim of the study, 28 were selected. Discussion: There is a great variety of birth control methods, and each has its associated advantages and disadvantages. Barrier contraceptive methods, most common of which are male condoms, are extremely popular in Western countries. Combined hormonal contraception methods which are available in the form of pills, patches, and rings. Progestin only contraception either in the form of a pill, injection or an implant is the most commonly used type among breastfeeding women. Furthermore, intrauterine devices are another effective contraceptive method which may be copper-based or hormonal-based. Conclusion: Contraception is an integral part of family planning, which can be achieved through a variety of methods. Each birth control method has its own pros and cons that should be explained to the couple clearly, so they can choose the method that is most suited for them.

The Use of Tele-Operated Cranes for Advanced Controls Education

2007 ◽  
Author(s):  
William Singhose ◽  
Joshua Vaughan ◽  
Jon Danielson ◽  
Jason Lawrence
Keyword(s):  
Time Delays ◽  
Control Methods ◽  
Dynamic Effects ◽  
Advanced Control ◽  
Hands On ◽  
Team Project ◽  
Advanced Controls ◽  
Institute Of Technology ◽  
And Control ◽  
Type Oscillation

Cranes provide an excellent platform for teaching advanced controls. They have a simple pendulum-type oscillation that is useful for demonstrating basic control methods. However, cranes also have additional dynamic effects such as motor dynamics, velocity limits, and nonlinear slewing dynamics that make them well suited for advanced study. If the cranes are made remotely operable, then students can also study tele-operation and control of systems with time delays. An advanced control design course taught at the Georgia Institute of Technology has integrated tele-operated cranes into both the lecture and laboratory exercises. The laboratories lead the students through the use of two tele-operated cranes. The lab component of the course culminates with a five-week team project in which the students design and implement their own research project on the cranes. The primary goal of using the cranes is to provide hands-on experiences in implementing advanced controllers on real systems. This paper describes the cranes and the complementary curriculum.

Welding Distortion Can be Mitigated if Welding Current and Traveling Speed Vary Optimized Along a Weld Path

2014 ◽  
Author(s):  
Mahyar Asadi ◽  
John Goldak ◽  
Arnaud Weck
Keyword(s):  
Control Method ◽  
State Of The Art ◽  
Welding Current ◽  
Welding Distortion ◽  
Advanced Method ◽  
Advanced Control ◽  
3D Photogrammetry ◽  
And Control ◽  
Additional Hardware ◽  
Traveling Speed

Typically, the distortion from welding is mitigated with the use of fixtures, clamps, tack welds and so on. Also the welding current and traveling speed are normally set constant during welding along a weld-path. The authors have developed and implemented an advanced control method that adaptively changes welding current and traveling speed depending on the state of deformation, in order to mitigate the final distortion without the use of additional hardware such as fixtures, clamps, and/or tack welds. It predicts the distortion before actual happening and adjusts parameters to counteract the deformation during welding. The present work implements this advanced method by applying an optimized, varying welding current and traveling speed on an edge-welded bar of Aluminum 5052-H32. A comparison is made between the final welding distortion with the new method, versus the regular method at constant welding current and traveling speed. A virtual predictive model was established to simulate and control the adaptive change of welding current and traveling speed, the optimized profile of the process parameters were performed by a robot, and the transient distortion was measured by state-of-the-art 3D photogrammetry cameras in real–time.

Research on Control System of Large Capacity of Hollow Blow Molding Machine

2015 ◽  
Vol 713-715 ◽  
pp. 885-888
Author(s):  
Jian Huang ◽  
Wei Min Li ◽  
Guang Liang Lu
Keyword(s):  
Control System ◽  
Wall Thickness ◽  
Development Process ◽  
Control Method ◽  
Control Points ◽  
Thickness Control ◽  
Advantages And Disadvantages ◽  
Development Analysis ◽  
And Control

This paper elaborate the structure of parison wall thickness control system; choice hardware of the control system; study on the determination of the thickness control method and control points of parison wall; research on the formation of the parison wall thickness curve; summed up the development process of extruding plastic machine heating method on the basis of the plastic molding machinery development; analysis the various of heating methods; summed up the advantages and disadvantages of various heating methods; explore their advantages and disadvantages for providing reference.

Intelligent Control Method of Ground to Air Missile Based on FCMAC

2011 ◽  
Vol 128-129 ◽  
pp. 168-171
Author(s):  
Gang Li ◽  
Hao He ◽  
Gang Fang ◽  
Jian Feng Wu
Keyword(s):  
Neural Network ◽  
Intelligent Control ◽  
Fuzzy Neural Network ◽  
Control Method ◽  
Basic Structure ◽  
Control Methods ◽  
Missile Guidance ◽  
Guidance And Control ◽  
Fuzzy Neural ◽  
And Control

Intelligent control methods of missile guidance and control system (GACS) are studied in this paper. Secondly, the component and principle of GACS is introduced. Based on the fuzzy neural network, this paper constructs a basic structure of the intelligent control method of missile. Meanwhile, a new intelligent control method of rolling channel of missile based on Fuzzy Cerebella Model Articulation Controller (FCMAC) is designed. Under complicated environmental conditions, the missile can be accurately controlled with this method. Finally, the application value is illustrated. It’s very meaningful to improve the combat capability.

scholarly journals Advanced Control Method of 5-Phase Dual Concentrated Winding PMSM for Inverter Integrated In-Wheel Motor

2021 ◽  
Vol 12 (2) ◽  
pp. 61
Author(s):  
Kan Akatsu ◽  
Keita Fukuda
Keyword(s):  
High Speed ◽  
Control Method ◽  
Permanent Magnet Synchronous Motor ◽  
Torque Ripple ◽  
Current Injection ◽  
Control Methods ◽  
High Current ◽  
Advanced Control ◽  
Speed Mode ◽  
Current Ripple

This paper presents some techniques for driving novel 5 phase dual winding PMSM (Permanent Magnet Synchronous Motor) for the in-wheel motor. The motor realizes winding change over characteristics that can expand driving area from high-torque mode to high-speed mode due to the dual winding construction. However, the dual winding structure makes a high-current ripple due to high coupling between windings. The paper proposes some control methods to reduce the current ripple, including inverter career ripple. The paper also presents harmonics current injection, such as the 3rd harmonics current injection method, to reduce the torque ripple and generate higher torque.

scholarly journals Control System Design for Feeding Machine of Sound Absorption Board Production Line

2015 ◽  
Vol 9 (1) ◽  
pp. 388-394 ◽  
Author(s):  
Yanjun Xiao ◽  
He Zhang ◽  
Rui Liu ◽  
Yuxiang Liu ◽  
Yongcong Li
Keyword(s):  
Control System ◽  
Material Removal ◽  
Sound Absorption ◽  
Control Method ◽  
Control System Design ◽  
Control Methods ◽  
Production Lines ◽  
Automatic Production ◽  
Mechanical Structure ◽  
And Control

This paper introduces a kind of mechanical structure and its control system, with which granular materials can be put into mould with a higher leveling status, the mechanical structure adopts split type arrangement, its function is to achieve the material removal and scraping, its control system is composed of a plurality of Mitsubishi PLC using masterslave control method. The mechanism and control methods can be widely applied in automatic production lines, which needs granular material into the mould quantitatively and passively wiped flatly.

scholarly journals Magnetic Levitation – Modelling, Identification and Open Loop Verification

2020 ◽  
Vol 8 (1) ◽  
pp. 13-16 ◽  
Author(s):  
Daniel Honc ◽  
Eleonora Riva Sanseverino
Keyword(s):  
Process Model ◽  
Control Method ◽  
Magnetic Levitation ◽  
Simulated Data ◽  
Open Loop ◽  
Model Quality ◽  
Unknown Parameters ◽  
Advanced Control ◽  
The Difference ◽  
And Control

<p>The paper describes a procedure using the first principle modelling and experimental identification of the Magnetic Levitation Model CE 152. It is a modified version of the paper [1]. The difference is that the identification and verification is done in open loop and constraints logic is added in the current paper. The author optimized and simplified dynamic model to a minimum to what is needed to characterize given system for the simulation and control design purposes. Only few open-loop experiments are needed to estimate the unknown parameters. Model quality is verified in open loop where the real and simulated data are compared. The model can serve as a simulation model for some standard control algorithms or as a process model for advanced control method design.</p>

scholarly journals Vehicle yaw rate simulation and control based on single-track model

2021 ◽  
Vol 10 (1) ◽  
pp. 019-029
Author(s):  
Abdussalam Ali Ahmed ◽  
Faraj Ahmed Elzarook Barood ◽  
Munir S. Khalifa
Keyword(s):  
Control Method ◽  
Stability Control ◽  
Network Control ◽  
Control Analysis ◽  
Control Methods ◽  
Single Track ◽  
Linear Quadratic ◽  
Yaw Rate ◽  
Driving Conditions ◽  
And Control

When designing a vehicle, the most important variable that should be taken into account is the vehicle yaw rate, it represents an important indication of the vehicle’s stability and control. This paper aims to demonstrate how to simulate and control the yaw rate of a vehicle using two control methods, the first is the Linear Quadratic control method (LQR) and the other one is neural network control. The classical single-track model is prominently used for yaw stability control analysis. One driving conditions performed is the steering input; the steering input in this work is set as step steering angle and a lane change manoeuvre. Simulation results showed that both control methods used produced good and convergent performance results for the vehicle under different driving conditions.

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