scholarly journals A Novel PID Robotic for Speed Controller Using Optimization Based Tune Technique

2021 ◽  
Author(s):  
Falih Salih Mahdi Alkhafaji ◽  
Wan Zuha Wan Hasan ◽  
Nasri Sulaiman ◽  
Maryam Mohd. Isa
Keyword(s):  
Response Characteristic ◽  
Internal Model Control ◽  
Time Response ◽  
Response Characteristics ◽  
Tuning Method ◽  
Speed Controller ◽  
And Performance ◽  
Tuning Methods ◽  
Gain Optimization ◽  
The Comparative Study

One of the most significant issue of proportional integral derivative (PID) controller is the efforts to optimize coefficient gains. Based on survey, massive tuning methods were proposed to resolve this problem but there is little pay attention to maximize minimization time response significantly. This study proposed a novel technique to maximize optimization PID gains for the DC motor controller by combining both proper tuning method with signal input signal output (SISO) optimization toolbox using optimization based tune (OBT) techniques, that could be utilized for the highest precision controller. The comparative study has been carried out by applying five different tuning methods to obtain a proper tuning controller, then to be combined with SISO optimization toolbox. The utilized tuning methods are Robust Auto tune (RAT), Ziegler–Nichols (Z-N), Skogestad Internal Model Control (SIMC), Chien Hroues Reswick (CHR), and Approximate M-Constrained Integral Gain Optimization (AMIGO). The performance of each tuning methods based OBT are analyzed and compared using MATLAB/SISO tool environment, where the efficiency has been assessed on a basis of time response characteristics (Ti) in terms of dead time (td), rise time (tr), settling time (ts), peak time (tp) and peak overshoot (Pos). The simulation results of AMIGO based proposal show a significant reduction time response characteristic to be measured in the Microsecond unit (μs). The novelty feature of the proposed is that provides superior balancing between robustness and performance. This study has been completely rewritten to account for the robotic controller development that has been taken place in the last years.

scholarly journals SIMULATION AND PERFORMANCE OF LIQUID LEVEL CONTROLLERS FOR LINEAR TANK

2020 ◽  
Vol 82 (3) ◽  
Author(s):  
Qahtan A. Mahmood ◽  
Amer T. Nawaf ◽  
Shaho A. Mohamedali
Keyword(s):  
Pid Controller ◽  
Absolute Error ◽  
Liquid Level ◽  
Pid Controllers ◽  
Water Tank ◽  
Level Control ◽  
Tuning Method ◽  
Squared Error ◽  
And Performance ◽  
Tuning Methods

Level control of liquid in a tank or any similar container is widely used in applications such as chemical and oil industrial processes. Control the level at desired value is very important. This paper studies the performance of P, PI, and PID controllers in controlling the level of a liquid. Mass balance is used to find mathematical model of water tank level. Ziegler-Nichol (Z-N) and Cohen-Coon (C-C) tuning methods are used to evaluate parameters of the controllers. The error indices such as Integral Absolute Error (IAE) and Integral Squared Error (ISE) are used to compare between performances of the controllers. MATLAB is used to test the control system performance and compare the results with real values. Both simulation and experimental results show that liquid level system can be controlled effectively by using Z-N tuning method. The result shows that the PI controller gives better performance in comparison with P and PID controller.

scholarly journals High-Order Filtered PID Controller Tuning Based on Magnitude Optimum

Mathematics ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 1340
Author(s):  
Damir Vrančić ◽  
Mikuláš Huba
Keyword(s):  
A Priori ◽  
Higher Order ◽  
Process Models ◽  
Pid Controllers ◽  
Tuning Method ◽  
Output Noise ◽  
Pid Controller Tuning ◽  
Output Time ◽  
Tuning Methods ◽  
Measured Input

The paper presents a tuning method for PID controllers with higher-order derivatives and higher-order controller filters (HO-PID), where the controller and filter orders can be arbitrarily chosen by the user. The controller and filter parameters are tuned according to the magnitude optimum criteria and the specified noise gain of the controller. The advantages of the proposed approach are twofold. First, all parameters can be obtained from the process transfer function or from the measured input and output time responses of the process as the steady-state changes. Second, the a priori defined controller noise gain limits the amount of HO-PID output noise. Therefore, the method can be successfully applied in practice. The work shows that the HO-PID controllers can significantly improve the control performance of various process models compared to the standard PID controllers. Of course, the increased efficiency is limited by the selected noise gain. The proposed tuning method is illustrated on several process models and compared with two other tuning methods for higher-order controllers.

scholarly journals Analysis of the Soft-Switching Tuning Effect on the Figures of Merit Involved in the Design of a Class-E Amplifier with Finite DC-Feed Inductance

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1705
Author(s):  
Ingrid Casallas ◽  
Robert Urbina ◽  
Carlos-Ivan Paez-Rueda ◽  
Gabriel Perilla ◽  
Manuel Pérez ◽  
...  
Keyword(s):  
Case Studies ◽  
Output Power ◽  
Soft Switching ◽  
Figures Of Merit ◽  
Tuning Method ◽  
Tuning Process ◽  
Tuning Methods ◽  
Zero Voltage ◽  
Voltage Switching ◽  
Class E

This paper explores the design of a Class-E amplifier with finite DC-feed inductance using three tuning methods. Furthermore, this work quantifies the impacts of the tuning process (referred to in this paper as the tuning effect) on the main figures of merit (FoMs) of this amplifier. The tuning goals were to guarantee two conditions: zero voltage and zero voltage derivative switching (i.e., soft-switching tuning). To the best of the authors’ knowledge, systematic tuning methods have not been analyzed before for this amplifier topology. Two of them are based on the iterative component tuning process, and they have been explored previously in the design of the conventional class-E amplifier with an RF choke inductance. The last tuning method explores the simultaneous adjustment of the control signal period and one amplifier capacitor. The analyzed tuning methods were validated by extensive simulations of case studies, which were designed following the power specifications of the Qi standard. In 100% and 96% of the case studies, zero voltage switching (ZVS) and zero-derivative voltage switching (ZDS) were achieved, respectively. Furthermore, we identified an unexpected behavior in the tuning process (referred to in this paper as the turning point), which consisted of a change of the expected trend of the soft-switching (i.e., ZVS and ZDS) point, and it occurred in 21% of the case studies. When this behavior occurred and converged to at least ZVS, the tuning process required more iterations and a large number of tuning variables. Additionally, after the tuning process, the total harmonic distortion and output power capacity were improved (i.e., in 78% and 61% of the case studies, respectively), whereas the output power, drain and added power efficiencies deteriorated (i.e., in 83%, 61% and 65% of the case studies, respectively) in the overall case studies. However, we could not identify an improvement in the overall FoMs related to the soft-switching tuning. Furthermore, the tuning impact was significant and produced some improvements and some deleterious effects for the FoMs in each case study, without a clear trend by FoMs or by tuning method. Therefore, the amplifier designer may choose the more favorable tuning method and the related FoM trade-offs for the required design specifications.

scholarly journals Numerical calculation and experimental study on response characteristics of pneumatic solenoid valves

2019 ◽  
Vol 52 (9-10) ◽  
pp. 1382-1393 ◽  
Author(s):  
Xiang Zhang ◽  
Yonghua Lu ◽  
Yang Li ◽  
Chi Zhang ◽  
Rui Wang
Keyword(s):  
Switching Time ◽  
Response Characteristic ◽  
Test System ◽  
Solenoid Valve ◽  
Circuit Model ◽  
Inlet Pressure ◽  
Driving Voltage ◽  
Response Characteristics ◽  
Aerodynamic Model ◽  
Set Up

In order to analyze the response characteristics of the solenoid valve in depth, the flow field of the solenoid valve is analyzed by means of the computational fluid dynamics, and the aerodynamic parameters that are difficult to be obtained by the traditional methods are obtained with software FLUENT. We also set up the mathematical model of the solenoid valve, including the aerodynamic model, the circuit model, the magnetic circuit model and the mechanical motion model. The calculation is completed in the Simulink, and the results of the calculation are analyzed. A set of the solenoid valve response characteristic test system is built, and the response characteristic parameters such as response time and maximum action frequency of the solenoid valve are tested. The experimental results are verified by comparing them with the simulation results. The final result shows that the response characteristics are basically irrelevant to the action frequency at a suitable working frequency. The open switching time of the solenoid valve decreases with the increase in the inlet pressure and the driving voltage and increases with the increase in the number of coil turns. The close switching time increases with the increase in the inlet pressure, the driving voltage and the number of coil turns.

scholarly journals Tuning of Nacelle Feedback Gains for Floating Wind Turbine Controllers Using a Two-DOF Model

2020 ◽  
Author(s):  
Eben Lenfest ◽  
Andrew J. Goupee ◽  
Alan Wright ◽  
Nikhar Abbas
Keyword(s):  
Production Performance ◽  
Offshore Wind ◽  
Feedback Gain ◽  
Tuning Method ◽  
Floating Offshore Wind Turbines ◽  
Integral Controller ◽  
Proportional Integral Controller ◽  
Angular Displacements ◽  
Tuning Methods ◽  
Tuning Strategy

Abstract Designing a collective blade pitch controller for floating offshore wind turbines (FOWTs) poses unique challenges due to the interaction of the controller with the dynamics of the platform. The controller must also handle the competing objectives of power production performance and fatigue load management. Existing solutions either detune the controller with the result of slowed response, make use of complicated tuning methods, or incorporate a nacelle velocity feedback gain. With the goal of developing a simple control tuning method for the general FOWT researcher that is easily extensible to a wide array of turbine and hull configurations, this last idea is built upon by proposing a simple tuning strategy for the feedback gain. This strategy uses a two degree-of-freedom (DoF) turbine model that considers tower-top fore-aft and rotor angular displacements. For evaluation, the nacelle velocity term is added to an existing gain scheduled proportional-integral controller as a proportional gain. The modified controller is then compared to baseline land-based and detuned controllers on an example system for several load cases. First-pass results are favorable, demonstrating how researchers can use the proposed tuning method to efficiently schedule gains for adequate controller performance as they investigate new FOWT configurations.

scholarly journals “Nign 3” from Beregovskii’s Jewish Folk Tunes Without Words: An Intro- duction to the Study of Hassidic Music in its Ukrainian Context

Ethnomusic ◽  
2020 ◽  
Vol 16 (1) ◽  
pp. 141-157
Author(s):  
Michael Lukin ◽  
◽  
Edwin Seroussi ◽  
Keyword(s):  
Performance Practice ◽  
Research Centre ◽  
Jewish Music ◽  
Hebrew University ◽  
Music Research ◽  
Main Representative ◽  
And Performance ◽  
The Russian Empire ◽  
The Comparative Study ◽  
Research Show

The article is a collaboration of two research projects: first one is the new an- notated edition of Moisei Beregovskii’s collection of Hassidic tunes (1946) in prepa- ration by Yaakov Mazor in the framework of the Jewish Music Research Centre of the Hebrew University of Jerusalem. The second project is a collaborative Israeli- Ukrainian project titled “The Hassidic Nign in Right Bank Ukraine and East Galicia: Between Autochthonous and External Soundscapes” lead by the three additional au- thors of the present article. The article is dedicated to the study of music in Ukrainian Hasidism, the main representative kind of which is nign – a religious song, performed mainly without words, by men, solo or collectively, in a monophonic texture, and fulfilling various religious functions of mystical background. Nign has apparently started to crystallize from the mid-eighteenth century onwards on the territories of Podillya and Volyn, with the consolidation of the Hassidic movement in those areas of Ukraine (then Po- land and later on the Russian Empire). Noticed by many scholars, the affinity that the Hassidic tunes have with the mu- sic of both Jewish and their co-territorial non-Jewish societies in Ukraine has led to the key question of this study, which is: What insights one can gain from the compara- tive analysis of melodies to the fuller picture of the Ukrainian Hassidic soundscape. The methodology of the study of the Hassidic nign in its historical, regional and conceptual Ukrainian contexts is based on comparative analysis of the nign (the nign itself attributed to the founder of the Chernobyl dynasty, Rabbi Mordechai of Cher- nobyl, its tune transcribed by M. Beregovskii from memory in 1920 and republished many times), its another version transcribed by Joseph Achron, and the four Ukrainian compositions from the anthology of Ukrainian folk melodies by Z. Lysko. The preliminary results of the comparative study of these musical texts in terms of form, modality, melodic contour, rhythm and performance practice, in this stage of the research show more differences than similarities between Hassidic and Ukrainian musical texts and contexts.

What matters for keeping or losing support in televised debates

2021 ◽  
pp. 026732312110467
Author(s):  
Pascal D. König ◽  
Thomas Waldvogel
Keyword(s):  
Real Time ◽  
Time Response ◽  
Preference Change ◽  
Policy Issues ◽  
Personal Issue ◽  
Party Identity ◽  
Run Up ◽  
And Performance ◽  
Performance Perceptions ◽  
Televised Debates

What leads citizens to change their candidate preferences during televised debates? The present paper addresses this question with real-time response and panel survey data from respondents recruited in the run-up to the 2017 German national election. Probing the importance of party identity and performance perceptions formed during the debate, the analysis more closely examines several core determinants than has previously been done with real-time response data. The findings suggest, first, that only a strong or very strong party identity is an effective barrier to candidate preference change. Second, beyond party identity, ratings of candidates’ issue-specific statements on policy issues show a very strong effect, albeit regardless of personal issue importance. Third, this influence of candidate ratings does not seem to be mediated through changes in valence perceptions. Rather, viewers seem to form a general impression of the candidates which cannot be reduced to performance perceptions regarding policy issues.

scholarly journals Study on the sensitivity of the hydraulic response characteristics of the electronic fuel injector regarding the key structural parameters

2019 ◽  
Vol 11 (1) ◽  
pp. 168781401882259 ◽  
Author(s):  
Yaonan Feng ◽  
Jie Wang ◽  
Fukang Ma ◽  
Tiexiong Su ◽  
Chunlong Xu ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Influencing Factor ◽  
Response Characteristic ◽  
Fuel Injector ◽  
Closing Time ◽  
Range Analysis ◽  
Small Opening ◽  
Response Characteristics ◽  
And Control ◽  
Hydraulic Response

The sensitivity of key structural parameters to the hydraulic response characteristics in an electronic fuel injector is investigated. First, the hydraulic response characteristic is defined in detail (the opening/closing delay and the opening/closing time). Second, the key structural parameters influencing the hydraulic response characteristics are derived. Finally, the importance and effects of key structural parameters on hydraulic response characteristics are examined, by using the design of experiments method and the range analysis. Results show that the fuel inlet passage diameter is the primary influencing factor to the opening delay and closing delay, while the control piston diameter has the dominant effect on opening time and closing time. A small opening delay and a small opening time prefer a little fuel inlet passage diameter and control piston diameter; however, they contribute to a large closing time and closing delay. The fuel outlet passage diameter is the secondary influencing factor in opening delay, but the second factor that affects the opening time is the diameter of needle.

Integrated Control/Display Unit vs. Dedicated Control Heads for Radio Tuning in a KC-135 Flight Simulator

1981 ◽  
Vol 25 (1) ◽  
pp. 258-262
Author(s):  
Debra A. Warner ◽  
David R. Gunning
Keyword(s):  
Integrated Control ◽  
Flight Simulator ◽  
Pilot Performance ◽  
Tuning Method ◽  
Display Unit ◽  
Subjective Opinion ◽  
Tuning Methods

A two-part study was conducted in a KC-135 flight simulator to determine the appropriateness of replacing dedicated control heads with an integrated control/display unit (CDU) for accomplishing cockpit communication (UHF, HF) and navigation (VOR) radio tuning. The CDU is being evaluated as a means of decreasing pilot workload to potentially enable a proposed reduction in KC-135 crew size. During both individual tuning tasks and simulated missions, time and error data were collected comparing pilot performance for the two tuning methods. Although subjective opinion favored the CDU concept, objective results indicated that the conventional tuning method (except HF) was faster. Various features of the CDU plus relative subject inexperience using the CDU were probable contributers to these unexpected results. Subsequent reevaluation is scheduled to occur incorporating changes which are designed to enhance CDU operability.

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