Download or read book Traffic Alert and Collision Avoidance System Logic Evaluation written by Barry R. Billmann and published by . This book was released on 1982 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to characterize the performance of the Traffic Alert and Collision Avoidance System (TCAS) logic which was developed by the Mitre Corporation. The evaluation was based on baseline logic documentation and logic changes made between January to October 1981. The report is the first part of a three-volume series and reflects the evaluation of logic performance using the Fast-Time Encounter Generator as the logic test bed for unequipped threats. The study was conducted in two phases. The initial phase addressed the identification and correction of logic flaws. After the improvements in the logic were coordinated with are provided by Mitre, the second phase assessed the TCAS logic performance for a wide variety of two-aircraft encounters. The report identifies the logic deficiencies and the results of the analysis. In general, TCAS logic performance was excellent. (Author).

Download or read book Traffic Alert and Collision Avoidance System TCAS Evaluation Volume II Equipped Threat Phase and an Assessment in an Error Degraded Environment written by Barry R. Billmann and published by . This book was released on 1983 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of certain aspects of Traffic Alert and Collision Avoidance System (TCAS) logic testing. It represents the second volume in a series of three reports. The report presents the results of analysis of both simulation and flight testing of the TCAS logic. The analysis was conducted between November 1981 and January 1982, at the Federal Aviation Administration Technical Center. The new TCAS logic significantly improved the resulting separation during encounters with TCAS equipped threats. Simplified command coordination procedures have increased command coordination reliability. Some minor logic modifications have been identified to further enhance TCAS logic performance for TCAS equipped threats. The performance of the logic in the presence of reduced surveillance link reliability was also analyzed. The link reliability level required to affect adequate resolution and separation was identified. This analysis was conducted in a measurement error-degraded environment. Review of flight test results indicate surveillance link reliability exceeds that required to affect adequate separation performance. (Author).

Download or read book TCAS Traffic Alert and Collision Avoidance System II Logic Performance During Phase One Operational Evaluation written by L. B. Zarrelli and published by . This book was released on 1984 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: This document describes the performance of the collision avoidance logic during the Phase I Operational Evaluation of the Traffic Alert and Collision Avoidance System called Minimum TCAS II. Between November 1981 and March 1982, TCAS units were installed on two Piedmont Airlines B727 aircraft flown on regularly scheduled passenger flights. For this phase of testing, data was recorded while trained observers viewed the TCAS advisories. However, these displays were not shown to the flight crew. The analysis of logic performance first required identification and removal of alerts caused by hardware or software coding problems that were subsequently fixed, or else caused by problems in the collision avoidance logic which were subsequently removed. Examples are shown for which logic improvements correct earlier problems. Operational questions, observer comments, and an assessment of the true alert rate are then examined using the recorded data. Additional keywords: Altimetry errors; Visual acquisition; and Near Midair Collision (NMAC). (Author).

Download or read book Traffic Alert and Collision Avoidance System TCAS Evaluation written by Barry R. Billmann and published by . This book was released on 1983 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book In service Evaluation of the Traffic Alert and Collision Avoidance System TCAS Industry Prototype written by Daniel H. Tillotson and published by . This book was released on 1988 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: An operational evaluation of the Traffic Alert and Collision Avoidance System (TCAS II) Industry Prototype was conducted to assess the utility of TCAS II to flight crews, to assess the impacts of TCAS on flight crew workload, to assess the impacts of TCAS on the air traffic control (ATC) system, and to obtain flight crew comments on TCAS design parameters and cockpit displays. The evaluation was conducted on one Boeing 727 aircraft operating in airline revenue service with Piedmont Airlines. Quantitative data on TCAS performance were collected to characterize the location and frequency of TCAS advisories. Qualitative data were collected from flight crews and cockpit observers to assess the impacts of TCAS on ATC and the flight crews. Minor operational anomalies the utility of TCAS and to assess were identified and changes to operational procedures or TCAS logic were recommended. Keywords: Human factors engineering, Avionics, Flight training.

Download or read book Lincoln Laboratory Evaluation of TCAS II Logic Version 6 O4a written by and published by . This book was released on 1996 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the Lincoln Laboratory evaluation of the Traffic Alert and Collision Avoidance System II (TCAS II) logic version 6.04a. TCAS II is an airborne collision avoidance System required since 30 December 1993 by the FAA on all air carrier aircraft with more than 30 passenger seats operating in U.S. airspace. Version 6.04a is a logic version mandated by the FAA by 30 December 1994 in order to correct a potential safety problem in earlier versions and to make the TCAS logic more compatible with the air traffic control system. Lincoln Laboratory evaluated the logic by examining approximately two million simulated pairwise TCAS-TCAS encounters, derived from actual aircraft tracks recorded in U.S. airspace. The main goals of the evaluation effort were: (1) to determine if version 6.04a successfully corrected the potential safety problem without introducing new problems; (2) to detect and explain any areas of poor performance; and (3) to understand the performance limits of the logic. Five analysis programs were written to aid in the evaluation, and these programs are described in the report. There were three phases of the evaluation corresponding to the above three goals. For each phase, the report gives an overview of the evaluation approach taken, a description of the results, and a summary. A description of follow-on activities plus overall conclusions and recommendations are given at the end of the report.

Download or read book Lincoln Laboratory Evaluation of TCAS II Logic Version 6 O4a Appendices Volume Ll written by and published by . This book was released on 1996 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the Lincoln Laboratory evaluation of the Traffic Alert and Collision Avoidance System II (TCAS II) logic version 6.04a. TCAS II is an airborne collision avoidance system required since 30 December 1993 by the FAA on all air carrier aircraft with more than 30 passenger seats operating in U.S. airspace. Version 6.04a is a logic version mandated by the FAA by 30 December 1994 in order to connect a potential safety problem in earlier versions and to make the TCAS logic more compatible with the air traffic control system. Lincoln Laboratory evaluated the logic by examining approximately two million simulated pairwise TCAS-TCAS encounters, derived from actual aircraft tracks recorded in U.S. airspace. The main goals of the evaluation effort were: (1) to determine if version 6.04a successfully corrected the potential safety problem without introducing new problems; (2) to detect and explain any areas of poor performance; and (3) to understand the performance limits of the logic. Five analysis programs were written to aid in the evaluation, and these programs are described in the report. There were three phases of the evaluation corresponding to the above three goals. For each phase, the report gives an overview of the evaluation approach taken, a description of the results, and a summary. A description of follow-on activities plus overall conclusions and recommendations are given at the end of the report.

Download or read book Lincoln Laboratory Evaluation of TCAS II Logic Version 7 Volume 1 written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the Lincoln Laboratory evaluation of the Traffic Alert and Collision Avoidance System II (TCAS II) logic version 7. TCAS II is an airborne collision avoidance system required since 30 December 1993 by the FAA on all air carrier aircraft with more than 30 passenger seats operating in the U.S. airspace. Version 7 is a major revision to the TCAS II logic consisting of more than 300 separately defined changes affecting all major TCAS areas (surveillance, CAS logic and displays/aurals). Lincoln Laboratory evaluated the logic by examining approximately two million simulated pairwise TCAS-TCAS encounters, derived from actual tracks recorded in U.S. airspace. The main goals of the evaluation were: (1) to study the performance of the new TCAS-TCAS coordinated reversal logic; (2) to detect and explain any areas of poor performance; (3) to examine the performance of the version 7 logic for the 30 Representative NMACs identified during the 6.04a logic evaluation; and (4) to understand the limitations of the logic by analyzing every version 7 NMAC. Five Lincoln Laboratory analysis programs written for previous logic evaluation work were updated and new software was written to aid in the evaluation of TCAS-TCAS sense reversals. There were four phases of the evaluation corresponding to the above goals. For each phase the report gives an overview of the evaluation approach taken and a description of the results. An overall summary and perspective on the evolution of the TCAS II logic are given at the end of the report.

Download or read book Simulation Test and Evaluation of TCAS II Logic Version 6 04 written by Suzanne Bradley and published by . This book was released on 1992 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book To Review the Status of the Airborne Traffic Alert and Collision Avoidance System TCAS written by United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Investigations and Oversight and published by . This book was released on 1992 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Alert and Collision Avoidance System written by G. P. Boucek and published by . This book was released on 1985 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes one of a series of studies being conducted to develop the Traffic Alert and Collision Avoidance System (TCAS). The purpose of this study was to conduct a pilot evaluation of the relationship between TCAS displays, an operational crew station, aircraft performance, TCAS logic and operational TCAS procedures. The specific objectives of the evaluation were to be: Develop and evaluate the operational procedures associated with TCAS alerts under both normal and abnormal flight operations; Assess changes in flight deck operations associated with TCAS; Assess operational procedures as related to ATC control; Assess the impact of TCAS display requirements on flight deck systems and geometry. During the evaluation experienced transport pilots were presented TCAS alerts while flying a high fidelity B737-200 training simulator. Their response to the alerts was observed and recorded as were their opinions concerning the system. As a result of reviewing pilot responses to 552 TCAS encounters with a total of 970 intruder aircraft, it is recommended that TCAS be revised to achieve more consistantly correct pilot response. Keywords: Collision Avoidance, Aircraft Separation Assurance; Alert; Warning Systems; Signal Response; Visual Alerts; Signal Detection.

Download or read book Final Report written by and published by . This book was released on 2000 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pilots Use of a Traffic Alert and Collision avoidance System TCAS 2 in Simulated Air Carrier Operations Volume 1 Methodology Summary and Conclusions written by and published by . This book was released on 1989 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Alert and Collision Avoidance System TCAS Cockpit Display of Traffic Information CDTI Investigation written by and published by . This book was released on 1991 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pilot Evaluation of TCAS Traffic Alert and Collision Avoidance System in the Long Ranger Helicopter written by John W. Andrews and published by . This book was released on 1986 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: A specially modified version of the Traffic Alert and Collision Avoidance System (TCAS) was installed in a Bell Long Ranger helicopter in order to investigate the feasibility of TCAS operation in rotorcraft. This installation employed TCAS air-to-air surveillance to provide automated traffic advisories that were displayed in the cockpit on a color cathode ray tube display. As part of this study, 12 subject pilots evaluated the utility of the installation through brief test flights in the vicinity of a major airport. Among the topics investigated were the rate of alarms, the computer logic for issuing advisories, the bearing accuracy, and the display symbology. Several recommendations for adapting TCAS to the rotorcraft environment resulted from the testing.