Author: John F. CarterPublisher:
ISBN:
Category : Flight control
Languages : en
Pages : 24
Book Description
Production Support Flight Control Computers: Research Capability for F/A-18 Aircraft at Dryden Flight Research Center
Author: John F. CarterPublisher:
ISBN:
Category : Flight control
Languages : en
Pages : 24
Book Description
Initial Flight Test of the Production Support Flight Control Computers at NASA Dryden Flight Research Center
Author: John CarterPublisher:
ISBN:
Category : Flight control
Languages : en
Pages : 22
Book Description
Results From F-18B Stability and Control Parameter Estimation Flight Tests at High Dynamic Pressures
Author: Timothy R. MoesPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 146
Book Description
An Overview of Flight Test Results for a Formation Flight Autopilot
Author: Publisher:
ISBN:
Category : Automatic pilot (Airplanes)
Languages : en
Pages : 22
Book Description
The first flight test phase of the NASA Dryden Flight Research Center Autonomous Formation Flight project has successfully demonstrated precision autonomous station-keeping of an F/A-18 research airplane with a second F/A-18 airplane. Blended inertial navigation system (INS) and global positioning system (GPS) measurements have been communicated across an air-to-air telemetry link and used to compute relative-position estimates. A precision research formation autopilot onboard the trailing airplane controls lateral and vertical spacing while the leading airplane operates under production autopilot control. Four research autopilot gain sets have been designed and flight-tested, and each exceeds the project design requirement of steady-state tracking accuracy within 1 standard deviation of 10 ft.
Flying Quality Analysis of a JAS 39 Gripen Ministick Controller in an F/A-18 Aircraft
Author: John F. CarterPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 22
Book Description
NASA Dryden conducted a handling qualities experiment using a small displacement centerstick controller that Saab-Scania developed for the JAS 39 Gripen aircraft. The centerstick, or ministick, was mounted in the rear cockpit of an F/A-18 aircraft. Production support flight control computers (PSFCC) provided a pilot-selectable research control system. The objectives for this experiment included determining whether the mechanical characteristics of the centerstick controller had any significant effect on the handling qualities of the F/A-18, and determining the usefulness of the PSFCCs for this kind of experiment. Five pilots evaluated closed-loop tracking tasks, including echelon and column formation flight and target following. Cooper-Harper ratings and pilot comments were collected for each maneuver. This paper describes the test system, including the PSFCCs, the Gripen centerstick, and the flight test experiment. The paper presents results of longitudinal handling qualities maneuvers, including low order equivalent systems, Neal-Smith, and controls anticipation parameter analyses. The experiment showed that, while the centerstick controller provided a different aircraft feel, few handling qualities deficiencies resulted. It also demonstrated that the PSFCCs were useful fo this kind of investigation.
Initial Flight Test of the Production Support Flight Control Computers at NASA Dryden Flight Research Center
Author: National Aeronautics and Space Administration (NASA)Publisher: Createspace Independent Publishing Platform
ISBN: 9781721185177
Category :
Languages : en
Pages : 34
Book Description
The NASA Dryden Flight Research Center has completed the initial flight test of a modified set of F/A-18 flight control computers that gives the aircraft a research control law capability. The production support flight control computers (PSFCC) provide an increased capability for flight research in the control law, handling qualities, and flight systems areas. The PSFCC feature a research flight control processor that is "piggybacked" onto the baseline F/A-18 flight control system. This research processor allows for pilot selection of research control law operation in flight. To validate flight operation, a replication of a standard F/A-18 control law was programmed into the research processor and flight-tested over a limited envelope. This paper provides a brief description of the system, summarizes the initial flight test of the PSFCC, and describes future experiments for the PSFCC. Carter, John and Stephenson, Mark Armstrong Flight Research Center NASA/TM-1999-206581, H-2343, NAS 1.15:206581, AIAA Paper 99-4203
NASA Tech Briefs
Author: Proceedings
Author: Data Synchronization Discrepancies in a Formation Flight Control System
Author: Publisher:
ISBN:
Category : Artificial satellites in navigation
Languages : en
Pages : 20
Book Description
Aircraft hardware-in-the-loop simulation is an invaluable tool to flight test engineers: it reveals design and imple,mentation flaws while operating in a controlled environment. Engineers, however, must always be skeptical of the results and analyze them within their proper context. Engineers must carefully ascertain whether an anomaly that occurs in the simulation will also occur in flight. This report presents a chronology illustrating how misleading simulation timing problems led to the implementation of an overly complex position data synchronization guidance algorithm in place of a simpler one. The report illustrates problems caused by the complex algorithm and how the simpler algorithm was chosen in the ned. Brief descriptions of the project objectives, approach, and simulation are presented. The misleading simulation results and the conclusions then drawn are presented.
Computers Take Flight: A History of NASA's Pioneering Digital Fly-By-Wire Project
Author: James E. TomaykoPublisher:
ISBN:
Category : History
Languages : en
Pages : 210
Book Description