Preliminary Thoughts on Simulating the Operational Logic of a Conventional Retarder System Using Profile

Details

• Corporate Creators:
  SRI International
• Subject/TRT Terms:
  Classification Yards Design Dowty Retarder Hump Yards Railroad Yards Retarder Control Retarders (Concrete)
• Publication/ Report Number:
  Informal Working Note #15
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  SRI International
• Abstract:
  This note discusses preliminary thoughts on incorporating the logic to represent a conventional retarder yard system into PROFILE. PROFILE is the SRI-developed hump yard profile simulation model and was described in the Appendix to Informal Note #4. Currently, PROFILE does not simulate the logic by which the retarder system determines how much energy should be taken out of each car; the amount of retardation being simply a user input. This note addresses a proposed logic which is felt to be representative of model state of the art retarder control logics. It should be emphasized that only that part of the logic which is external to the retarder's internal operation is considered here; i.e., the detailed process by which energy is extracted while the car is within the retarder is not treated in this note. Possible future retarder logics, which, for example, attempt to control for headway in a more direct manner, are also not considered in this note. These will be subject of future work.
• Format:
  PDF
• Funding:
  Project 7663-3
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0afeab20ef6b9378ec38480473a7030d86e27985d43ccd6a343e4a968d97f9a414380f8d0ab43ee3ddbedc5960b59c2c01283b18c7a9e4a0b4f2b1743b56bd1c
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/77873/dot_77873_DS1.pdf
• File Type:
  [PDF - 1002.25 KB ]