scholarly journals RESEARCH ON THE HYSTERESIS EFFECT ON POSITIONING THE SYSTEM WITH FLEXIBLE ELEMENTS / POZICIONAVIMO SISTEMOS SU LANKSČIAISIAIS ELEMENTAIS HISTEREZĖS EFEKTO TYRIMAS

2015 ◽  
Vol 6 (6) ◽  
pp. 607-611 ◽  
Author(s):  
Audrius Čereška ◽  
Giedrius Augustinavičius
Keyword(s):  
Software Package ◽  
Test Bench ◽  
Piezoelectric Actuators ◽  
Displacement Sensor ◽  
Hysteresis Phenomenon ◽  
Matlab Simulink ◽  
Positioning Systems ◽  
Conducting Research ◽  
Experimental Researches ◽  
Gathering Data

The paper analyzes the hysteresis phenomenon of positioning systems with flexible elements for transmitting motion of which piezoelectric actuators are used. The article investigates the influence of hysteresis on the accuracy of positioning systems. A special test bench for conducting research and stand-up methodology for carrying out experimental researches have been used. The test bench includes a computer piezo controller, an inductive displacement sensor and a dynamic data collector used for gathering data and transmitting it to the software package. Mathematical modelling of hysteresis using Matlab/Simulink software package has been done. The performed research has shown that the hysteresis model of maximum dispersion error compared to experimental results makes less than 5%. Thus, it can be stated that the selected method for hysteresis modelling is suitable for precision positioning systems having deformable elements and controlled employing piezoelectric actuators to model hysteresis. Straipsnyje nagrinėjamas pozicionavimo sistemos su lanksčiaisiais elementais, kurių judesiui perduoti naudojami pjezoelektriniai vykdikliai, histerezės reiškinys. Tiriama histerezės įtaka pozicionavimo sistemų tikslumui. Tyrimams atlikti naudotas specialus tyrimų stendas ir sudaryta eksperimentinių tyrimų metodika. Tyrimų stendą sudaro: kompiuteris pjezovaldiklis, indukcinis poslinkio jutiklis, duomenims rinkti ir perduoti į programinį paketą naudojamas dinaminis duomenų rinktuvas. Atliktas histerezės matematinis modeliavimas taikant Matlab/Simulink programinį paketą. Tyrimais nustatyta, kad histerezės modelio maksimali sklaidos paklaida, palyginti su eksperimentiniais rezultatais, yra mažesnė nei 5 %, todėl galima teigti, kad pasirinktas histerezės modeliavimo būdas yra tinkamas precizinių pozicionavimo sistemų, turinčių lanksčiuosius elementus, valdomus pjezoelektriniais vykdikliais, histerezei modeliuoti.

Development of a Micro-Positioning Grinding Table Using Piezoelectric Voltage Feedback

1995 ◽  
Vol 209 (6) ◽  
pp. 469-474 ◽  
Author(s):  
J-D Kim ◽  
S-R Nam
Keyword(s):  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Input Voltage ◽  
Point Of View ◽  
Displacement Sensor ◽  
Position Sensor ◽  
Positioning Systems ◽  
Wide Range ◽  
Voltage Feedback ◽  
Piezoelectric Voltage

Micro-positioning systems using piezoelectric actuators have a very wide range of applications including ultra-precision machine tools, optical devices and measurement systems. In order to ensure a high-precision displacement resolution, they use a position sensor and error feedback. From a practical point of view, a high-resolution displacement sensor system is very expensive and it is difficult to guarantee that such sensitive sensors work properly in the harsh operating environments of industry. In this paper, a micro-positioning grinding table has been developed which does not require a position sensor but instead uses piezoelectric voltage feedback. It is driven by a hysteresis-sensitive reference input voltage calculated by computer using the actuator/sensor characteristics of piezoelectric materials. The experimental results illustrate the fast and stable response of the micro-positioning system, and the paper suggests a more efficient technique for controlling piezoelectric actuators.

Modeling of Piezoelectric Actuator Based Nano-Positioning System Using Multi-Polynomial Regression with C1 Continuity

2007 ◽  
Vol 339 ◽  
pp. 434-441 ◽  
Author(s):  
S. Tse ◽  
Y. Gao
Keyword(s):  
Piezoelectric Actuator ◽  
Polynomial Regression ◽  
Piezoelectric Actuators ◽  
Zero Order ◽  
Positioning System ◽  
Modeling Error ◽  
Order Continuity ◽  
Positioning Systems ◽  
First Order ◽  
Command Signals

For nano-positioning systems with piezoelectric actuators used for dynamic grinding control, sinusoidal command signals will used and will give additional problems compared with the commonly used step signals because of the hysteresis effects, which require a good modeling approach. The proposed approach of multiple polynomial regression with first order continuity gives a relative modeling error of 2.65%. The method reduces the error by 26.3-80.2% in comparison with the methods using the single, dual, and multiple polynomial regression with zero order continuity.

scholarly journals ENERGETIC REGULARITIES OF PULSE LOADING BY SYSTEMS WITH INTERMEDIATE LINK

2017 ◽  
Vol 2017 (1) ◽  
pp. 83-90
Author(s):  
Александр Яшин ◽  
Aleksandr Yashin ◽  
Сергей Баринов ◽  
Sergey Barinov ◽  
Алексей Киричек ◽  
...  
Keyword(s):  
Total Energy ◽  
Pulse Energy ◽  
Test Bench ◽  
Symmetry Axis ◽  
Deformation Source ◽  
Pulse Loading ◽  
Shock Pulse ◽  
Shock System ◽  
Experimental Researches ◽  
Energy Portion

The investigations carried out deal with the re-gularity study in the distribution of shock pulse energy at multiple procedures of loading. The experimental researches were carried out on the specially developed test bench in which under all waveguides (or tools) of the shock system there were situated independently (separately) sensors connected with an oscilloscope registering parameters of a shock pulse (a form, amplitude, duration). As a result it was determined that the increase of the eccentricity in the symmetry axis location of a head and a waveguide (or a tool) and their number in the shock system contributes to the reduction of an energy portion sent to the deformation source. The application of multi-contact schemes of loading allows sending large total energy of a shock pulse to the deformation source to accept conditions of experiment fulfillment. At that the energy portion of a shock pulse fall-ing to each waveguide (or a tool) in the multicontact scheme as compared with the singlecontact one decreases (for rod-formed waveguides by 20%, and for spherical tools – by 15%) at the installation of each subsequent waveguide (or a tool) in the shock system.

Adjustable Compliant Mechanism Load Deflection Test Bench Design

2018 ◽  
Author(s):  
Ayse Tekes ◽  
Kevin McFall ◽  
Franklin Woods ◽  
Alexander Bryant
Keyword(s):  
Machine Vision ◽  
Test Object ◽  
Test Bench ◽  
Compliant Mechanism ◽  
Displacement Sensor ◽  
Linear Actuator ◽  
Flexible Links ◽  
Shaped Beam ◽  
Buckled Beam ◽  
Deflection Test

Two adjustable compliant mechanism load deflection test benches are presented in this study. Both test bench mechanisms enable testing the deflection of flexible links or mechanisms. The modularity of the designs provides to test various link forms such as fixed-fixed and pinned-pinned joints. The load deflection test benches consist of a linear actuator, an amplifier rod, a linear rail and a sliding car. The measurement setup is equipped with force and displacement sensors for the linear actuator, various clamps to attach the compliant member, and machine vision software to measure member deflection. A displacement-controlled loading using a linear actuator, rack-pinion attached to a motor, or step loading with a pulley can be applied as an input to the system. There are several limitations involved in the design. First, the length of the test object should be kept between 5 cm to 30 cm. Second, a low cost linear actuator with a low extension velocity to obtain quasi static deflection curves of the compliant members is required. Finally, the design should also have the capability of providing various types of boundary conditions with interchangeable attachments. The force can be applied either parallel or perpendicular to the test object. Input load deflection is measured with the displacement sensor, and the resulting member displacement measured visually using machine vision software. This software synchronizes data from the displacement sensor and a calibrated camera image to automatically detect deflection using a pinhole camera model and known dimensions of the test apparatus. The purpose of this study is to design and fabricate a load deflection test setup capable of testing flexible links and compliant mechanisms. Two different designs are proposed and explored in this study. The first design is the modification of a commercially available ECP Model 210 educational turnkey system favorably utilized in undergraduate level vibrations and control labs. By attaching the designed clamps on two carts, fixed-fixed and U shaped compliant link load deflection can be obtained. Four cases such as fixed-fixed buckling beam, U shaped beam buckling with one end sliding, already buckled beam loaded at its upper midpoint, and inverse U-shaped beam loaded at its apex to form deflected M beam (with design 2) are considered. In order to achieve buckled beam experiments in which the load is applied at the midpoint of the already buckled links, a new test bench consisting of a linear actuator, rigid links, rail and two sliding cars is designed.

Some features of experimental researches in sheep breeding: to help of young scientists

2020 ◽  
pp. 58-64
Author(s):  
V. Aboneev ◽  
V. Marchenko ◽  
E. Aboneeva
Keyword(s):  
Research Work ◽  
Age Groups ◽  
Animal Husbandry ◽  
Economic Effectiveness ◽  
Sheep Breeding ◽  
Modern Period ◽  
Reliable Performance ◽  
Conducting Research ◽  
Experimental Researches ◽  
Teaser Rams

Organizing and conducting scientific and farm experiment is one of the most important components of any scientific and research work. The features of the modern period of animal husbandry development, the state of the feed base in all categories of farms, the availability of qualified specialists, the level and culture of conducting selection and technological techniques, create the main conditions for reliable performance of experimental researches. In sheep breeding the success of research work on the selection plan depends to a large extent on careful individual accounting of the results of insemination and lambing of ewes. Currently, in different categories of sheep farms crossbreeding is used as one of the methods for faster improvement and increasing the productivity of animals. At the same time, it is not always clear from the materials of many researches how the experimental groups of breeding stock were formed, what rules of selection were observed during artificial insemination, how accounting was carried out during insemination and lambing of ewes, what justifies the calculation of some indicators of economic effectiveness of the research without taking into account important economically useful features. The recommendations on how to eliminate possible errors when conducting research and production experiments by young scientists have been provided in the article. In particular, the main principles of forming experimental groups of sheep by age, productivity and origin have been shown. The necessity of housing all sex and age groups of experimental animals with complete feeding has been noted. The most important condition is the same number of ewes inseminated every day with the semen of each mating stud ram. It has been recommended to use vasectomy teaser rams for the authenticity of the origin of the obtained off spring. Special attention has been paid to the need to take into account all valuable economic useful features studied in the course of scientific and production experiments to calculate some indicators of economic effectiveness when rearing off spring of different origin.

Development of Brushless D.C. Motor Drive System for Teaching Purposes Using Various PWM Control Techniques

2012 ◽  
Vol 49 (3) ◽  
pp. 210-231 ◽  
Author(s):  
Nadia Tadrist ◽  
Houcine Zeroug ◽  
Boussad Boukais
Keyword(s):  
Student Satisfaction ◽  
Test Bench ◽  
Control Strategies ◽  
Motor Drive ◽  
Real Time Control ◽  
Matlab Simulink ◽  
Control Techniques ◽  
Time Control ◽  
Drive Control ◽  
Motor Drive System

In this paper, a test bench was developed for teaching purposes to enhance power electronics and real time control of a brushless d.c. motor. Particular emphasis was placed on PWM techniques and theoretical signal generation using a MATLAB/Simulink environment and experimentally with a DSP programming kit. First, a model was developed in MATLAB/Simulink derived from electrical and mechanical equations for the 120° mode. The control strategies implemented involved two PWM techniques, namely soft and hard switching. The system was built in such a way that students are able to carry out modelling and confirm their results through the test bench using these techniques. The approach used has been effective in generating student satisfaction. Improvements in student learning are evident with regard to the drive control applications, either as a variable speed drive or in embedded systems.

Simulation and Experimental Studies on Magnetic Valve Controlled Reactor

2013 ◽  
Vol 694-697 ◽  
pp. 795-798
Author(s):  
Gang Liu ◽  
Guang You Li ◽  
Wei Li
Keyword(s):  
Simulation Model ◽  
Equivalent Circuit ◽  
Experimental Studies ◽  
Experimental Results ◽  
Matlab Simulink ◽  
Operational Principle ◽  
Magnetic Valve ◽  
Simulation Results ◽  
Experimental Researches

Some simulation and experimental researches on magnetic-valve controlled reactor (MCR) have been done in this paper. Firstly, the equivalent circuit of MCR is derived according to the operational principle. Secondly, based on MATLAB/Simulink, the simulation model is established, in addition, the simulation researches are carried out. Thirdly, a MCR, with rated voltage 220V and rated capacity 600VA, is designed and tested. Comparing the experimental results with simulation results prove the validity of simulation model.

scholarly journals Distribution System Fault Analysis Using MATLAB/SIMULINK

2021 ◽  
Author(s):  
Jyotirmoy Hazarika ◽  
O P Roy
Keyword(s):  
Distribution System ◽  
Software Package ◽  
Distribution Network ◽  
Fault Analysis ◽  
Modelling And Simulation ◽  
Network System ◽  
Protective Device ◽  
Matlab Simulink ◽  
Proposed Model

In this paper, the impacts of various faults in the distribution network system (DNS) have been analyzed. Modelling and simulation is done using MATLAB/Simulink software package. The proposed model is simple and it can be used by power engineers as a platform. The designed model is used to study various common faults in distribution network at different points. The waveform display due to the various faults gives us an idea of hazardousness of the respective fault. The response of the system after introducing protective device is also observed.

scholarly journals Experimental analysis of vertical axis wind turbine active pitch control system with Permanent Magnet Synchronous Motor using MATLAB Simulink tools

Energetika ◽  
2016 ◽  
Vol 62 (1-2) ◽  
Author(s):  
Tomas Komass
Keyword(s):  
Control System ◽  
Wind Turbine ◽  
Permanent Magnet ◽  
Test Bench ◽  
Permanent Magnet Synchronous Motor ◽  
Vertical Axis ◽  
Vertical Axis Wind Turbine ◽  
Matlab Simulink ◽  
Pitch Control ◽  
Pitch System

Efficient vertical axis wind turbine (VAWT) technology is a key topic for the future wind energy market. At the moment, VAWTs are seldom used for electricity production. The development of new technologies for building a new generation of VAWTs, which will be more efficient, user-friendly, and with very low noise pollution levels is the target for many researchers. The goal of this research was to analyse an active pitch control system in an experimental setting through construction of an active pitch control system test bench using a Permanent Magnet Synchronous Motor (PMSM) and to develop new testing programmes for analytical system performance tests. The  current commercial turbines do not carry an active pitch system for a VAWT; however, the concept of an active turbine blade pitching opens new opportunities for boosting the efficiency, safety, and user-friendliness of VAWTs. The  research consists of the  mathematical model and control system operating in a simulation environment in a closed loop with the test bench setup consisting of an active pitch control system. By applying a specially developed VAWT simulation model implemented in MATLAB Simulink, an active pitch system was tested and analysed under various conditions, which were as close as possible to the real-world operating conditions. The results of the testing and analysis show that an active pitch system using the PMSM can be very efficient and fast-operating. An active pitch system is able to work on the needed conditions by using the PMSM. Analysis shows that while using the PMSM for a turbine active pitch system, certain conditions should be taken into account in order to achieve the best results and to reduce costs. Full and effective use of active pitch system components can improve VAWT performance.

scholarly journals Experimental Researches of the Cone-Belt Dispenser

1970 ◽  
Vol 66 (1) ◽  
Author(s):  
Zoltán HAGYMÁSSY ◽  
Erzsébet ANCZA ◽  
Ágnes GINDERT KELE
Keyword(s):  
Test Bench ◽  
Vertical Position ◽  
Different Types ◽  
Significant Change ◽  
Degree Deviation ◽  
Experimental Researches ◽  
Experimental Plots

Distributing different types of fertilizer more accurately and evenly necessary in experimental plots. In probe parcels the more and more precise labour quality demands require mechanization of experiments. A solution is offered to mechanization of distributing fertilizer on probe parcels. A new plot fertilizer distributor was designed and built. I outline here the principle of working of the plot fertilizer. The unevenness of spreading of each type is significantly influenced by the tilt of the cone-belt dispenser from vertical position. A test-bench was collected to measure the aberrations. The measurement proves that only a few degree deviation results in significant change in the unevenness of dispensing.

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