ON THE OPTIMAL SAMPLED DATA CONTROL OF STRINGS OF VEHICLE AND SAMPLED-DATA CONTROL OF HIGH-SPEED TRAINS

THESE PAPERS DEAL WITH THE CONTROL OF THE POSITIONS AND VELOCITIES OF HIGH-SPEED VEHICLES IN A SINGLE GUIDEWAY. (THE SECOND ONE LISTED ABOVE IS ESSENTIALLY THE SAME AS THE FIRST EXCEPT THAT IT CONTAINS AN APPENDIX WITH A DETAILED LISTING OF THE COMPUTER ALGORITHMS USED.) EACH AND EVERY VEHICLE MEASURES ITS POSITION AND VELOCITY EVERY T SECONDS. THE APPROPRIATE ACCELERATIONS TO BE APPLIED TO EACH VEHICLE ARE CONSTRAINED TO BE CONSTANT DURING THE SAMPLING INTERVAL THE CONTROL COST-FUNCTION PENALIZES THE SYSTEM FOR ANY DEVIATIONS FROM THE DESIRED HEADWAY AND VELOCITY. THE REQUIRED CONTROL ACCELERATIONS ARE OBTAINED BY DERIVING THE SYSTEM EQUATIONS IN DISCRETE-TIME. THROUGH THE USE OF AVAILABLE RESULTS IN THE THEORY OF DISCRETE OPTIMAL CONTROL, THE OPTIMAL LINEAR TIME-INVARIANT SAMPLED-DATA FEEDBACK CONTROL SYSTEM IS DETERMINED. THE GENERAL RESULTS ARE PRESENTED AND ARE USED TO STUDY THE EFFECT OF CHANGING THE SAMPLING TIME T UPON THE CONTROL-SYSTEM PERFORMANCE. SINCE, IN GENERAL, THE COST OF THE COMMUNICATION SYSTEM (IN TERMS OF REQUIRED CHANNEL CAPACITY, BAND-WIDTH, ETC.) DECREASES WITH INCREASING VALUES OF THE SAMPLING TIME, THE SYSTEM DESIGNER HAS THE CAPABILITY OF CONDUCTING TRADE-OFF STUDIES INVOLVING THE DETERIORATION OF THE CONTROL SYSTEM PERFORMANCE VS. THE DECREASE IN THE COST OF COMMUNICATION AS THE SAMPLING TIME IS INCREASED. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1767714
• Supplemental Notes:
  • Vol 2, pp 362-382
• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Civil Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • LEVIS, A H
  • Athans, M
• Publication Date: 1968-11

Media Info

• Serial:
  • Transportation Science
  • Publisher: Institute for Operations Research and the Management Sciences (INFORMS)
  • ISSN: 0041-1655
  • Serial URL: http://transci.journal.informs.org/

Subject/Index Terms

• TRT Terms: Acceleration (Mechanics); Communication systems; Control systems; Distributions (Statistics); Feedback control; Headways; High speed ground transportation; High speed vehicles; Public passenger vehicles; Speed; Velocity
• Uncontrolled Terms: Transit vehicles
• Old TRIS Terms: Discrete distributions
• Subject Areas: Highways; Operations and Traffic Management; Public Transportation; Railroads;

Filing Info

• Accession Number: 00225677
• Record Type: Publication
• Source Agency: Traffic Systems Reviews & Abstracts
• Files: TRIS
• Created Date: Jul 21 1970 12:00AM