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[ pdf ] Magnetic Levitation System 2EM

Magnetic Levitation System 2EM Download
Topic under  Control Engineering
Source: ee.sharif.edu 
File size: 753.48 KB
File type: pdf
Last download on: Thu Apr 12, 2018 03:34:52 AM
Short Desciption:
Magnetic Levitation System 2EM (MLS2EM) Userís Manual, The Magnetic Levitation System with 2 Electromagnets (MLS2EM) is a complete (after assembling and software installation) control laboratory system ready to experiments.

Introduction The Magnetic Levitation System with 2 Electromagnets (MLS2EM) is a complete (after assembling and software installation) control laboratory system ready to experiments. The is an ideal tool for demonstration of magnetic levitation phenomena. This is a classic control problem used in many practical applications such as transportation - magnetic levitated trains, using both analogue and digital solutions to maintain a metallic ball in an electromagnetic field. MLS2EM consists of two electromagnets, the suspended hollow steel sphere, the sphere position sensors, computer interface board and drivers, a signal conditioning unit, connecting cables, real time control toolbox and a laboratory manual. This is a single degree of freedom system for teaching of control systems; signal analysis, real-time control applications such as MATLAB. MLS is a nonlinear, open-loop unstable and time varying dynamical system. The basic principle of MLS operation is to apply the voltage to an upper electromagnet to keep a ferromagnetic object levitated. The object position is determined through a sensor. Additionally the coil current is measured to explore identification and multi loop or nonlinear control strategies. To levitate the sphere a real-time controller is required. The equilibrium stage of two forces (the gravitational and electromagnetic) has to be maintained by this controller to keep the sphere in a desired distance from the magnet. When two electromagnets are used the lower one can be used for external excitation or as contraction unit. This feature extends the MLS application and is useful in robust controllers design. The position of the sphere may be adjusted using the set-point control and the stability may be varied using the gain control. Two different diameter spheres are provided. The band-width of lead compensation may be changed and the stability and response time investigated. User-defined controllers may be tested.
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