COMPUTER/SIMULATION STUDY OF AIR-DERIVED SEPARATION ASSURANCE SYSTEMS IN MULTIPLE AIRCRAFT ENVIRONMENT.
Interim rept. no. 2,
COLLINS RADIO CO CEDAR RAPIDS IOWA
Pagination or Media Count:
The performance of two classes of air-derived separation assurance systems ADSAS were investigated by analytical means, and the most promising system was further studied by computer simulation methods. The two ADSAS classes studied were the range-altitude R-A technique using as a primary hazard predictor, tau, the ratio of range to range-rate and the relative position-velocity technique using both tau and the normal velocity component as hazard predictors. Primary emphasis was placed upon the R-A system using timefrequency ranging techniques. The parameters of this system were varied to maximize its performance. It was concluded Range-altitude systems based upon the use of timefrequency ranging techniques showed hazard prediction performance superior to those available from the ground-bounce ranging techniques or the relative position-velocity system based upon interrogation-transponder ranging techniques. The timefrequency R-A system gives adequate rectilinear flight performance with rms range measurement errors of 2000 feet and range-rate errors of 30 feet per second. While the simple R-A system will offer complete protection in rectilinear flight regimes, it has serious deficiencies in turning encounters. The use of projection techniques can provide adequate protection for all expected encounters in both en route and terminal areas.
- Flight Control and Instrumentation