JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2018, Vol. 48 ›› Issue (2): 114-120.doi: 10.6040/j.issn.1672-3961.0.2017.608

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Estimation of speed and acceleration of the Maglev platform by state observer

DAI Shiyu1,2, LIU Shuqin1,2*   

  1. 1. School of Electrical Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. Shandong Magnetic Bearing Technology Center, Jinan 250061, Shandong, China
  • Received:2017-09-14 Online:2018-04-20 Published:2017-09-14

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Abstract: In order to solve the problem of single pendulum oscillation during the Maglev platform hanging iron, structuring state observer which could estimate the velocity and the acceleration in vertical direction of maglev system was advanced to obtain damping coefficient when the system oscillating. The state observer took signs of coil voltage and sensor feedback information of the suspension gap sign as input and velocity and acceleration in vertical direction of the Maglev platform as state variable. On the premise of maintaining the robustness of the original system, pole of the system was placed after adding the state observer. The results showed that robustness of the system stayed well after adding the state observer. And the state observer could accurately estimate the velocity and the acceleration in vertical direction of the Maglev platform and effectively obtain the real time information of the damping coefficient.

Key words: Maglev platform, negative damping oscillation, state observer, pole assignment, Simulink simulation

CLC Number: 

  • TP273.2
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