HIERARCHICAL COMPUTERIZED ADAPTIVE CONTROL STRATEGY FOR THE FREEWAY SYSTEM

The existing models and strategies for optimal adaptive control according to the large scale systems theory are limited in operational size as a result of the largge number of dimensions. It is proposed to overcome the problem by positioning the adaptive control in the lowest layer of the hierarchical control system (the individual traffic facilities). Given the non-linearity of the models and the quick changes, a 'gain-scheduling' control is favored. A second control lauer coordinates the control in each of the individual traffic facilities and accounts for the traffic states on the interface with neighboring subsystems. In a third control layer the working modes for all the lower layers are selected and set-points, coefficients, constants and weighing elements are set and regulated. More individual safety criteria can be incorporated as constraints in the adaptive control.

• Corporate Authors:

  Technische Hogeschool Delft

  Dept of Transportation Planning and Highway Engineering
  Delft,   Netherlands 
• Authors:
  • Fan, W B
  • Asmussen, E
  • BLIKMAN, G
• Publication Date: 1990-1

Media Info

• Pagination: 52 p.

Subject/Index Terms

• TRT Terms: Control systems; Nonlinear programming; Traffic control
• Old TRIS Terms: Traffic control systems
• Subject Areas: Highways; Operations and Traffic Management;

Filing Info

• Accession Number: 00615947
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: VK-7703.301
• Files: TRIS
• Created Date: Sep 30 1991 12:00AM