Advanced Magnetic Suspension and Balance System Having Characteristics of Light Weight, Electric Power Saving, and Fast Response

2012 ◽  
Vol 134 (4) ◽  
Author(s):  
Y. Kawamura ◽  
T. Mizota
Keyword(s):  
Electric Power ◽  
Test Section ◽  
Large Scale ◽  
Control Method ◽  
Electrical Response ◽  
Power Saving ◽  
Response Speed ◽  
Magnetic Suspension ◽  
Balance System ◽  
Five Axes

We have developed an advanced magnetic suspension and balance system (MSBS), in which iron yokes are not used and a pair of strong magnets are installed to generate magnetic force compensating gravitational force applied to the aerodynamic models. By the introduction of these strong magnets, the electric power saving was realized. By not using iron yokes, not only the weight saving was realized but also the electrical response speed was increased due to the reduction of the inductance of the magnetic coils. The test section of the MSBS is 36 cm × 40 cm. We have developed the control method to support the model and give an arbitral movement of small amplitude at the center of the test section around five axes. In order to evaluate the characteristics of this MSBS, we performed the calibration tests of magnetic forces for our MSBS. We measured drag coefficients of a sphere aerodynamic model in order to confirm the performance of these MSBSs and had good agreements between the measured values and the values appeared in the common aerodynamic hand book. The MSBS has been studied and used in large scale laboratories. We think that these experimental results make the application of the MSBS into the wind tunnel experiment easier and can be the trigger to popularize it in small laboratories.

Wind Tunnel Experiment of Bluff Body Aerodynamic Models Using a New Type of Magnetic Suspension and Balance System

2013 ◽  
Vol 135 (10) ◽  
Author(s):  
Y. Kawamura ◽  
T. Mizota
Keyword(s):  
Wind Tunnel ◽  
Power Consumption ◽  
Electric Power ◽  
Large Scale ◽  
Bluff Body ◽  
Magnetic Suspension ◽  
Electric Power Consumption ◽  
Small Scale ◽  
Balance System ◽  
Five Axes

We have measured drag coefficients of a sphere and a circular cylindrical aerodynamic model using a five axes and a six axes control magnetic suspension and balance system (MSBS) developed by us. This MSBS has the characteristics of large aperture relative to the weight, light weight, and small electric power consumption in comparison with the conventional ones. We had good agreements between the measured values of the drag coefficient and the values appearing in the common aerodynamic handbook or textbook. We also succeeded in measuring the aerodynamic influence of a supporting rod of the aerodynamic models making use of the characteristics of the MSBS. Conventionally, the MSBS can be used only in large scale laboratories because the size, weight, and electric power consumption are large. We think that successful measurements of various aerodynamic characteristics using this type of MSBS will stimulate the introduction of it into the wind tunnel experiments in small scale laboratories.

Improved Output Characteristic of Distributed Hybrid Solar–Wind Generating Materials by Using Fuzzy and Immune MPPT Control Method

2011 ◽  
Vol 321 ◽  
pp. 76-79
Author(s):  
Li Qun Liu ◽  
Chun Xia Liu
Keyword(s):  
Solar Wind ◽  
Electric Power ◽  
Control Method ◽  
Response Speed ◽  
Climatic Conditions ◽  
Output Characteristic ◽  
Maximum Power ◽  
Maximum Power Point ◽  
Power Point ◽  
Response Feedback

The price of photovoltaic (PV) materials and wind generating system (WGS) materials is costly, and the stand-alone PV or WGS can not steadily supplied electric power for end user, fortunately, solar power and wind power can compensate well for one another under various locations and climatic conditions, an efficient maximum power point tracking (MPPT) method for hybrid solar-wind electricity materials is important to extract maximum power from wind and solar energy because of the costly price of PV and WGS. The fuzzy MPPT method is used to track the maximum power point (MPP) of distributed small WGS and PV and hybrid solar-wind system. In order to decrease the output oscillation, the immune response feedback principle (IRFP) is used to improve the track speed and response speed and robust of output characteristic of electricity materials, the results displayed that the immune theory can effectively improve the performance and the stability of electric power of stand-alone or hybrid generating materials.

The Nonlinear PID Control for Beam Magnetic Suspension System of Gantry-Moving Type Numerically Controlled Machine Tool

2012 ◽  
Vol 546-547 ◽  
pp. 992-996
Author(s):  
Chun Fang Liu ◽  
Bin Zang ◽  
Tong Wang
Keyword(s):  
Pid Control ◽  
Pid Controller ◽  
Control Method ◽  
Magnetic Levitation ◽  
Response Speed ◽  
Fast Response ◽  
Magnetic Suspension ◽  
Control Effect ◽  
Maglev System ◽  
Nonlinear Tracking

The maglev system is a typical nonlinear system, it is difficult to get the best control effect only by nonlinear control method. At first, the maglev system is linearized in this paper, for the classic PID control magnetic levitation system which exists the contradiction between fast and overshoot .This paper adopts the nonlinear tracking-differentiator-based PID controller to control the maglev system. Finally simulation results show that the nonlinear PID controller has fast response speed, no overshoot, and strong robustness in controlling the maglev system.

System modeling and control system performance optimization of magnetic suspension and balance system

2021 ◽  
pp. 1-18
Author(s):  
Wentao Xia ◽  
Zhiqiang Long ◽  
Fengshan Dou
Keyword(s):  
Wind Tunnel ◽  
Performance Optimization ◽  
Control Method ◽  
System Modeling ◽  
Suspension System ◽  
Magnetic Suspension ◽  
Measurement Technology ◽  
Signal Noise ◽  
Fast Tracking ◽  
Balance System

A magnetic suspension and balance system (MSBS) is a kind of aerodynamic test equipment for aircraft. It uses levitation control technology to replace the mechanical support and strain measurement technology in traditional wind tunnel balance. It has the advantage of no model support to interfere with the wind tunnel flow field and make the test environment more realistic, but the MSBS has technical difficulties to be solved. It is difficult to control and stabilize because it has a large suspension gap, nonlinear magnetic field, a long-acting distance of magnetic force, and uses a visual sensor to feedback the position of the controlled object that it has signal noise. At present, there are few studies on the suspension control method and suspension performance of MSBS. In this paper, in order to solve the above technical difficulties, the vertical control of the MSBS is taken as the research object, the electromagnetic field of the vertical coil is modeled and analyzed. A new control algorithm based on a fast-tracking differentiator (FTD) is proposed to solve the signal noise problem in MSBS. The influence of various factors in the control link on the suspension system is analyzed, and its optimization is carried out to improve the performance of the suspension system.

scholarly journals Development of a low electric power 40 cm class magnetic suspension and balance system

2004 ◽  
Vol 29 (1) ◽  
pp. 98_117-98_127 ◽  
Author(s):  
Yoshiyuki KAWAMURA ◽  
Tomoyasu TAKENAGA ◽  
Jong-bin OH ◽  
Takaomi TAKAHASHI ◽  
Chang-ki KWON ◽  
...  
Keyword(s):  
Electric Power ◽  
Magnetic Suspension ◽  
Balance System

scholarly journals Design of Robust Control System of Magnetic Suspension and Balance System through Harmonic Excitation Simulation

Aerospace ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 304
Author(s):  
Dong-Kyu Lee
Keyword(s):  
Adaptive Control ◽  
Control System ◽  
Power Supply ◽  
Test Section ◽  
Test Object ◽  
Control Algorithm ◽  
Magnetic Suspension ◽  
Electric Power Supply ◽  
Balance System ◽  
Adaptive Control Algorithm

The magnetic suspension and balance system (MSBS) uses magnetic force and moment to precisely control the movement of the test object located at the center of the test section without mechanical contact, and at the same time measure the external force acting on the test object. If such an MSBS is installed around the test section of the wind tunnel so that the position and attitude angle of the test object follow the harmonic function, various vibration tests can be performed on structures subjected to aerodynamic loads without the influence of the mechanical support. Because the control force and moment in the MSBS is generated by a number of electromagnets located around the test section, it is necessary to apply the adaptive control algorithm to the position and attitude control system so that the experiment can be carried out stably despite the sudden performance change of each electromagnet and electric power supply. In this study, a fault-tolerant position and attitude angle control system was designed through an adaptive control algorithm, and the effectiveness was verified through simulation under the condition that the electric power supply of MSBS failed.

Electric Power Saving for Acticontact Aeration Blower

2015 ◽  
Vol 69 (6) ◽  
pp. 617-622
Author(s):  
Kenichiro Fukushima
Keyword(s):  
Electric Power ◽  
Power Saving

scholarly journals A Novel Methodology for Adaptive Coordination of Multiple Controllers in Electrical Grids

Mathematics ◽  
2021 ◽  
Vol 9 (13) ◽  
pp. 1474
Author(s):  
Ruben Tapia-Olvera ◽  
Francisco Beltran-Carbajal ◽  
Antonio Valderrabano-Gonzalez ◽  
Omar Aguilar-Mejia
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Large Scale ◽  
Short Circuit ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Electric Power System ◽  
Design Stage ◽  
Positive Interaction

This proposal is aimed to overcome the problem that arises when diverse regulation devices and controlling strategies are involved in electric power systems regulation design. When new devices are included in electric power system after the topology and regulation goals were defined, a new design stage is generally needed to obtain the desired outputs. Moreover, if the initial design is based on a linearized model around an equilibrium point, the new conditions might degrade the whole performance of the system. Our proposal demonstrates that the power system performance can be guaranteed with one design stage when an adequate adaptive scheme is updating some critic controllers’ gains. For large-scale power systems, this feature is illustrated with the use of time domain simulations, showing the dynamic behavior of the significant variables. The transient response is enhanced in terms of maximum overshoot and settling time. This is demonstrated using the deviation between the behavior of some important variables with StatCom, but without or with PSS. A B-Spline neural networks algorithm is used to define the best controllers’ gains to efficiently attenuate low frequency oscillations when a short circuit event is presented. This strategy avoids the parameters and power system model dependency; only a dataset of typical variable measurements is required to achieve the expected behavior. The inclusion of PSS and StatCom with positive interaction, enhances the dynamic performance of the system while illustrating the ability of the strategy in adding different controllers in only one design stage.

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