Modeling and Simulation of a Superconducting EMS-Type Maglev Vehicle/Guideway System

Computer simulation models are developed for predicting the dynamic performance of a magnetically levitated (maglev) vehicle with a superconducting (SC) electromagnetic suspension (EMS) traversing a flexible, multiple span, elevated guideway. A single Degree Of Freedom (DOF) vehicle model incorporating model SC magnet dynamics as well as a five DOF vehicle model are developed. The SC magnets are controlled via Linear Quadratic (LQ) optimal control augmented with integral action. Vehicle disturbances include crosswind gusts as well as guideway deflections due to span compliance, step, ramp, camber, and versine irregularities, and random roughness. A first simulation study tests LQ optimal preview control on the single DOF maglev vehicle operating on a rigid guideway. The results show that the controller regulates the air gap to a nominal value, achieves zero steady-state gap error due to a step disturbance, and offers improved performance relative to an optimal controller without preview. A second simulation study applies LQ optimal control to the five DOF maglev vehicle model negotiating a multi-span flexible guideway. The results suggest that requirements on the air gap safety margin, control voltage limit, and ride quality can be satisfied for the cases studied.

• Record URL:
  • https://www.fra.dot.gov/eLib/details/L18150#p1_z50_gD_lRT_y1995
• 
• Corporate Authors:

  Carnegie Mellon Research Institute

  700 Technology Drive
  P.O. Box 2950
  Pittsburgh, PA  United States  15230-

  Volpe National Transportation Systems Center

  Cambridge, MA  United States  02142

  Federal Railroad Administration

  Office of Research and Development, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Nagurka, Mark L
  • Wang, Ssu-Kuei
• Publication Date: 1995-11

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 107p

Subject/Index Terms

• TRT Terms: Degrees of freedom; Elevated guideways; Magnetic levitation; Magnetic levitation vehicles; Simulation; Superconducting magnets; Vehicle dynamics
• Uncontrolled Terms: Vehicle models
• Subject Areas: Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 01678131
• Record Type: Publication
• Report/Paper Numbers: DOT-VNTSC-FRA-95-16
• Contract Numbers: R5018/RR593
• Files: TRIS, ATRI, USDOT
• Created Date: Aug 20 2018 10:14PM