scholarly journals An Enhanced Dynamic Simulation Model of a Hybrid Magnetic Bearing Taking Account of the Sensor Noise

Sensors ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 1116 ◽  
Author(s):  
Dawid Wajnert ◽  
Jan K. Sykulski ◽  
Bronislaw Tomczuk
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Dynamic Simulation ◽  
Electric Circuit ◽  
Magnetic Bearing ◽  
Calculation Model ◽  
Object A ◽  
Control Signals ◽  
Dynamic Simulation Model ◽  
Simulation Results

The paper presents simulation and experimental verification of the hybrid magnetic bearing (HMB) performance characteristics. It has been demonstrated that the additional errors from the eddy current sensors have a significant impact on the control signals. An improved mathematical model combines a nonlinear magnetic equivalent circuit of the HMB with the ordinary differential equations of its transients. These equations describe the rotor motion and the electric circuit of the system, as well as the control system required for stable levitation of the rotor. Certain harmonics have been observed in the displacement signals of frequencies equal to the multiples of the cylinder rotations. The calculation model has, therefore, been improved, taking into account the interference of the harmonics. Simulation results were validated by comparing the time responses of the transients obtained from the numerical calculations with those measured on a real object; a satisfactory agreement between the results has been achieved.

The Development of a Longitudinal Control System for a Sports-Utility-Vehicle

2013 ◽  
Author(s):  
Herman Hamersma ◽  
Schalk Els
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Lateral Acceleration ◽  
Longitudinal Control ◽  
Test Vehicle ◽  
Acceleration Vector ◽  
Land Rover ◽  
Simulation Results ◽  
Utility Vehicle ◽  
High Center

A common problem with sports-utility-vehicles is the low rollover threshold, due to a high center of gravity. Instead of modifying the vehicle to increase the rollover threshold, the aim of the control system is to prevent the vehicle from exceeding speeds that would cause the vehicle to reach its rollover threshold. The aim of the autonomous longitudinal control system, discussed here, is to improve the vehicle’s safety by controlling the vehicle’s longitudinal behavior. In order to develop a control system that autonomously controls the longitudinal degree of freedom, an experimentally validated mathematical model of the test vehicle (a 1997 Land Rover Defender 110 Wagon) was used — the model was developed in MSC.ADAMS/View. The control system was developed by generating a reference speed that the vehicle must track. This reference speed was formulated by taking into account the vehicle’s limits due to lateral acceleration, combined lateral and longitudinal acceleration and the vehicle’s performance capabilities. The MSC.ADAMS/View model of the test vehicle was used to evaluate the performance of the control system on various racetracks for which the GPS coordinates were available. The simulation results indicate that the control system performed as expected by limiting the vehicle’s acceleration vector to the prescribed limits.

Improvement of Dynamic Models of Photovoltaic Arrays

2013 ◽  
Vol 419 ◽  
pp. 761-767
Author(s):  
Ji Nan Quan ◽  
Guang Yu Zhou ◽  
Chun Yan Chen
Keyword(s):  
Ambient Temperature ◽  
Dynamic Simulation ◽  
Control Strategy ◽  
Dynamic Models ◽  
Photovoltaic Cell ◽  
Nonlinear Characteristic ◽  
Photovoltaic Array ◽  
Photovoltaic Arrays ◽  
Dynamic Simulation Model ◽  
Simulation Results

The nonlinear characteristic of photovoltaic cell following changes of irradiation and ambient temperature must be solved to research solar energy deeply and to utilize it high-efficiently. For building simple and practical dynamic simulation model and seeking after control strategy for raising out-power, a modified dynamic model of photovoltaic array is developed based on the physical model of photovoltaic cell, in which the voltage and current coefficients about ambient temperature and irradiation are introduced. By the model with stronger applicability and generality, the photovoltaic array I-V characteristic can be simulated arbitrarily with changes of irradiationambient temperaturephotovoltaic module parameter and its combination. The validity of the model is verified by all of the simulation results under Matlab/Simulink.

Design of 2_DOF Simulation Platform for the Testing of Airborne Laser Communication APT System

2014 ◽  
Vol 989-994 ◽  
pp. 3683-3688
Author(s):  
Li Xin Meng ◽  
Ding Xuan Zhao ◽  
Yang Yang Bai ◽  
Li Zhong Zhang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Closed Loop ◽  
Laser Communication ◽  
Motion Simulation ◽  
Vector Method ◽  
Kinematics Model ◽  
Airborne Laser ◽  
Model And Simulation ◽  
Simulation Results

Lightweight, flexible motion simulation is the demand of airborne laser communication optical transceive when apply to outside test. A new parallel 2_DOF platform that has the function of azimuth and pitching is put forword based on the analysis of airplane position-pose changes affect the performance airborne laster communication APT system, and the kinematics model is established by using closed-loop vector method. Kinematics model is right through the comparison of mathematical model and simulation results of ADAMS, which provides the reference and basis for the design of control system.

The Research of the Asynchronous Motor Vector Control Arithmetic

2012 ◽  
Vol 157-158 ◽  
pp. 878-881 ◽  
Author(s):  
Fang Gao ◽  
Li Wei
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Vector Control ◽  
Closed Loop ◽  
Induction Motors ◽  
Asynchronous Motor ◽  
Flux Vector ◽  
Simulation Results ◽  
Vector Control System ◽  
Control Principle

This paper is based on analysis of mathematical model of the induction motor and the basis of the asynchronous motor vector control principle puts forward a torque of inner closed-loop speed, flux vector control system of induction motors. Using Matlab/Simulink construct simulation model and the simulation results are analyzed.

FPGA-Based Design of P-Detection 1-Persistent CSMA Control System

2014 ◽  
Vol 602-605 ◽  
pp. 933-936 ◽  
Author(s):  
Zheng Gang Liu ◽  
Hong Wei Ding ◽  
Jia Long Xiong ◽  
Qian Lin Liu ◽  
Xiao Hui Ma
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
System Performance ◽  
Communication Protocol ◽  
Test Results ◽  
Fpga Design ◽  
Simulation Results ◽  
Communication Control ◽  
The Mathematical Model ◽  
Waveform Simulation

In this paper, we propose P-detection and 1-Persistent CSMA/CA protocol. Using average cycle method, we established the mathematical model of the protocol. Through derivation, we obtain the throughput expression of this protocol. Simulation results show that this protocol improves the throughput and it is effective to enhance the system performance. Using this protocol, we completed the FPGA design of communication control system in WSN. The product passed waveform simulation and it is downloaded to the DB2 platform. Test results confirm the throughput of system has been increased, achieving the improvement of communication protocol for WSN.

Research on Control System of Gearless Permanent Magnet Synchronous Traction Elevator

2011 ◽  
Vol 383-390 ◽  
pp. 5945-5950
Author(s):  
Yan Hu ◽  
Zhen Guang ◽  
Xiao Yu Wang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Permanent Magnet ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Modulation Method ◽  
Driving System ◽  
Simulation Results ◽  
The Mathematical Model

A driving system for gearless traction machine plays an very important role in controlling elevator’s running. And its performances have a direct effect on the elevator’s performance. On the basic of the mathematical model of the gearless permanent magnetic synchronous machine (PMSM), id=0 vector control method and space vector pulse width modulation method are used in the control system. Then making a simulation on the system designed by MATLAB/SIMULINK. The simulation results show that the control method is feasible.

Simulation and Experiment of Power Amplifier for Magnetic Bearings

2014 ◽  
Vol 998-999 ◽  
pp. 476-480
Author(s):  
Zi Jing Zhao ◽  
Ye Fa Hu ◽  
Liang Zhang ◽  
Hua Chun Wu
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Power Amplifier ◽  
Rise Time ◽  
Dynamic Properties ◽  
Equivalent Model ◽  
Experimental Platform ◽  
Simulink Model ◽  
Simulation And Experiment ◽  
Simulation Results

Power amplifier is an important part of maglev control system and it may need lots of time and manpower at regulating PI parameters. To solve this problem, an equivalent model was proposed to simplify the parameter adjustment. In this paper, firstly, mathematical model of the power amplifier was proposed and the Simulink model was built in Matlab software. Then the experimental platform was established and dynamic properties of the power amplifier were studied by simulation and experiment. The results show that the overshoot and rise time of experiment and simulation results matches well and the error of cut-off frequency is less than 10%. Therefore, it has instructional significance for parameters design.

The Mathematical Models and Simulation on Work Roll Bending Control System of Cold Rolling Mill

2014 ◽  
Vol 556-562 ◽  
pp. 2337-2341
Author(s):  
Yan Ping Wang ◽  
Xin Bing Yang ◽  
Yao Hui Jin ◽  
Bao Quan Liu ◽  
Jun Sheng Wang
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Influence Function ◽  
Rolling Mill ◽  
Work Roll ◽  
Cold Rolling Mill ◽  
Roll Bending ◽  
Simulation Results ◽  
Equivalent Load ◽  
The Mathematical Model

The calculated result of the mathematical model based on the conventional transfer function has bigger deviation than the measured. In this paper the mathematical model of the work roll bending is derived. The modeling is different from conventional modeling used many presumptions and linear processing. The modeling calculated accurately the equivalent load spring using the method of influence function. The simulation results agree well with actual data of the bending system.

scholarly journals Development of a Distributed Mathematical Model and Control System for Reducing Pollution Risk in Mineral Water Aquifer Systems

Water ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 151
Author(s):  
Alexander V. Martirosyan ◽  
Yury V. Ilyushin ◽  
Olga V. Afanaseva
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Mineral Water ◽  
Structural Integrity ◽  
Mutual Influence ◽  
Operating Mode ◽  
Mineral Waters ◽  
Object A ◽  
Input Action ◽  
Aquifer Systems

The article is devoted to the problem of the growing need of the mineral water fields’ exploitation process automation. The implementation of control systems and mathematical modeling methods can significantly reduce the fields’ structural integrity violation and pollution of aquifers risks. This research is especially relevant for the fields with difficult conditions of mineral waters occurrence, since the insufficient accuracy of determining the fields’ operating mode parameters can lead to a severe incident. The article describes a distributed mathematical model developed from the geo-filtration equation. Based on this model, a new method for assessing the mutual influence of the fields, the production of which is carried out from one aquifer, is presented. For a more detailed study of the operating mode parameters influence on the object a physical model of the reservoir was developed. The using of Arduino sensors and the developed software allows us to construct a 3D graph of the input action and its response at the different points of the object as temperature distribution. The simulation results make it possible to use the proposed model for the automatic control system synthesis.

Analysis and synthesis of converter control system of autonomous induction generator with field oriented control

2013 ◽  
Vol 62 (2) ◽  
pp. 267-279 ◽  
Author(s):  
Błażej Jakubowski ◽  
Krzysztof Pieńkowski
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Control Algorithm ◽  
Induction Generator ◽  
Field Oriented Control ◽  
Analysis And Synthesis ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Load Circuit

Abstract The paper presents the mathematical model of an autonomous induction generator with the AC load circuit and the converter control system of the voltage magnitude at the terminals of stator generator. The control algorithm and the structure of the control system are described. The simulation results of the control system are presented and discussed.

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