Simulation Test and Evaluation of TCAS II Logic Version 6.04
Abstract
This paper presents the objectives of the Traffic Alert and Collision Avoidance System 11 (TCAS II) version 6.04 logic, and the testing and evaluation of it. Described in this paper are the operational problems experienced with its predecessor version 6.0, along with the modifications that address them. In addition to the testing and evaluation process, performance measures are described. Performance of the two logic versions were compared using simulations of encounters derived from ground radar data from eleven U.S. locations. The two major goals in comparing the logic versions were the following: Obtain an assessment of the effectiveness of the changes on the collision avoidance capability. Characterize the effect of the changes on ATC. The test and evaluation showed that TCAS II version 6.0-4 logic appears to be operating properly with no adverse effects on any unaltered portions of the logic. That is, no errors were introduced by version 6.04. Operationally, results of simulations show that the new logic features appear to be very effective in reducing alert rates and displacements. Specifically unnecessary Traffic Advisories and Resolution Advisories in critical phases of flight were reduced. Resolution Advisories issued at low altitude and on parallel approach were reduced dramatically. The bump-up phenomenon was substantially reduced Unnecessary displacements against legally separated VFR traffic were reduced as well. These four enhancements contribute to making TCAS considerably more compatible with the ATC environment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1992
- Accession Number
- ADA256363
Entities
People
- Suzanne Bradley
Organizations
- MITRE Corporation