Download or read book Volume IV Flight Test Management Chapter 6 Simulation for Flight Test written by and published by . This book was released on 1982 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: No engineering discipline has experienced such rapid growth as simulation. With the advent of modern digital computers the use of simulation has exploded. Simulation has become a critical part of U.S. research and development programs. Would the Space Shuttle even be possible without simulation? Air Force contractors are relying more and more on simulation in the design and development process. It covers a wide spectrum of applications from the design and testing of aircraft and aircraft subsystems to the training of the aircrews. With further increases in electronic technology the applications for simulation will only be enhanced. The future objective of flight test may very well be the validation of math model simulations of aircraft and their subsystems. Test Pilots and flight Test Engineers need an appreciation of this new and expanding field. The flight test community is currently experiencing the twin problems of rapidly escalating test and energy costs coupled with increasing test requirements to satisfactorily evaluate systems of ever increasing complexibility. Simulation is viewed as a ajor contributor to the solution of this problem.
Download or read book Volume IV Flight Test Management Chapter 5 Flight Test Instrumentation written by and published by . This book was released on 1990 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of any test is to collect data which are then used to evaluate the article being tested. Instrumentation is the term applied to the equipment used to collect these data. Flight test programs invariably represent a significant investment of resources, and therefore considerable care must be devoted to identifying the specific requirements for the flight test and to assure that the data systems will yield the required information. The first step towards the flight test instrumentation system then is a clear statement of the objectives of the flight test programs. These objectives are drawn up by those who require the information for analysis. On the basis of these objectives, the flight test organization will prep are a preliminary flight test program, a list of parameters which must be measured, and other special requirements. The instrumentation design phase begins when the test engineers develop a measurements list. Using this list, the instrumentation engineer produces an overall design approach for the instrumentation system required to obtain the data measurements. In the instrumentation development phase, the hardware and software of the instrumentation system are developed by technical specialists. In this phase, commercially available parts are chosen and ordered, and parts for the system which must be made in-house are designed and fabricated. At the end of this phase, the actual hardware and software will have been obtained, calibrated, and installed.
Download or read book Flight Testing written by Steffen Haakon Schrader and published by Springer Nature. This book was released on 2023-03-06 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: As spinning is still involved in around 60% of all aircraft accidents (BFU, 1985 and Belcastro, 2009), this aerodynamic phenomenon is still not fully understood. As U.S. and European Certification Specifications do not require recoveries from fully developed spins of Normal Category aeroplanes, certification test flights will not discover aeroplane mass and centre of gravity combinations which may result in unrecoverable spins. This book aims to contribute to a better understanding of the spin phenomenon through investigating the spin regime for normal, utility and aerobatic aircraft, and to explain what happens to the aircraft in terms of the aerodynamics, flight mechanics and the aircraft stability. The approach used is to vary the main geometric parameters such as the centre of gravity position and the aeroplane’s mass across the flight envelope, and to investigate the subsequent effect on the main spin characteristic parameters such as the angle of attack, pitch angle, sideslip angle, rotational rates, and recovery time. First of all, a literature review sums up the range of technical aspects that affect the problem of spinning. It reviews the experimental measurement techniques used, theoretical methods developed and flight test results obtained by previous researchers. The published results have been studied to extract the effect on spinning of aircraft geometry, control surface effectiveness, flight operational parameters and atmospheric effects. Consideration is also made of the influence on human performance of spinning, the current spin regulations and the available training material for pilots. A conventional-geometry, single-engine low-wing aeroplane, the basic trainer Fuji FA-200-160, has been instrumented with a proven digital flight measurement system and 27 spins have been systematically conducted inside and outside the certified flight envelope. The accuracy of the flight measurements is ensured through effective calibration, and the choice of sensors has varied through the study, with earlier sensors suffering from more drift than the current sensors (Belcastro, 2009 and Schrader, 2013). In-flight parameter data collected includes left and right wing α and β-angles, roll-pitch-yaw angles and corresponding rates, all control surface deflections, vertical speeds, altitude losses and the aeroplane’s accelerations in all three directions. Such data have been statistically analysed. The pitch behaviour has been mathematically modelled on the basis of the gathered flight test data. Nine observations have been proposed. These mainly cover the effects of centre of gravity and aircraft mass variations on spin characteristic behaviour. They have all been proven as true through the results of this thesis. The final observation concerns the generalisation of the Fuji results, to the spin behaviour of other aircraft in the same category. These observations can be used to improve flight test programmes, aircraft design processes, flight training materials and hence contribute strongly to better flight safety.
Download or read book Volume IV Flight Test Management Chapter 1 Introduction to Flight Test Management written by and published by . This book was released on 1990 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt: Normally the word 'management' sends a chill up the spine of every able-bodied aircrew and conjures up images of Peter Drucker drawing effectiveness graphs on a chalkboard, but rest assured, that is not the case here. Flight Test Management is the fundamental theory, application, and management considerations used to design, build, and evaluate current flight systems. It integrates knowledge and flying skills with supervisory practices to make test teams capable of safely and efficiently conducting flight tests on projects of any nature. This volume will be your starting and finishing points in your flight test education and will probably be your most common reference for years to come. Test Management as a discipline has had a slow and painful evolution. It has generally been one of those nuisances that appeared to hold testers back, but over the years and after many costly accidents and mistakes, it has taken on extreme importance. Today, there are many facets to Test Management and they are only loosely coordinated. Currently, efforts are afoot to advance Test Management to becoming an integrated science and consequently produce better aircraft systems more quickly and efficiently.
Download or read book Brief van Simon Vestdijk 1898 1971 aan Wilhelmus Mooijman 1925 written by and published by . This book was released on 1969 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Volume IV Flight Test Management Chapter 5A Instrumentation Handbook written by and published by . This book was released on 1993 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook is provided as a consolidated reference of the Test Pilot School's instrumentation systems. It is recommended that the student use this text in conjunction with the Partial Flight Manuals, keeping in mind that the primary intent of the handbook is for use as a quick source of information. The following sections of the handbook provide information about the capabilities and operation of the Airborne Data Acquisition Systems, used at the Test Pilot School. Changes and corrections to this manual will be made, when necessary, by TPS. Suggestions and recommendations for changes should be directed to TS (TPS Tech Support).
Download or read book Volume IV Test Management Phase Chapter 4 Logistics Flight Testing written by and published by . This book was released on 1991 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text was part of a graduation lecture at the test pilot school at Edwards AFB. The students were remined that " ... the fighters, bombers, trainers and transports of tomorrow, along with their bombs, rockets, bullets, lasers, and particle beam transmorgifiers, are going to be tested and passed/failed by YOU. The good parts and the bad parts. The things you absolutely love and the things you didn't notice until the hardware gets out to the guys in the field. All of it will be under Y0UR microscope. All of it will appear on YOUR flight card or on the flight cards of the folks who work for you. Since what the Washingtonians will pay for is based on your reports on the performance, suitability, spec compliance, reliability, and supportability of this expensive, state of the art equipment, it's somewhat important that you soon-to-be Test Directors, Squadron Commanders, and Test Managers understand the whole big picture. Logistics is part of that BIG PICTURE."
Download or read book Volume IV Flight Test Management Chapter 12 F A R Certification written by and published by . This book was released on 1983 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONTENTS - INTRODUCTION; HISTORY OF FAA CERTIFICATION; CERTIFICATION CHARACTERISTICS; CERTIFICATION FLIGHT TEST PHILOSOPHY; INFORMATION TO THE CUSTOMER; FAR REQUIREMENTS FOR CERTIFICATION: Stalls, Takeoff, Climb, Landing, Controllability and Maneuverability, Static Longitudinal Stability, Lateral Directional Stability, Dynamics, Engine-Out Characteristics, Case Studies; CONCLUSIONS; RECOMMENDATION; and REFERENCES.
Download or read book Volume IV Test Management Phase Chapter 11 Qualitative Flight Testing written by and published by . This book was released on 1990 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Qualitative flight testing determines the maximum amount of information in the minimum amount of flying time in order to evaluate an aircraft with respect to its entire mission or so specific area of interest. Qualitative flight testing has essentially the same purpose as quantitative flight testing, i.e., to determine how well the aircraft flies and how well it will perform its designed mission. To accurately evaluate an aircraft from quantitative data requires analysis of large amounts of precisely measured data. The best a pilot can hope to do on a qualitative evaluation is to measure a limited amount of quantitative data. Thus, the test pilot's opinion on the acceptability of the aircraft is the important result and measured quantitative data (when available) is used primarily to support this opinion. Quantitative values of stick forces measured with a hand gage, for example, should be included in the report to support the pilot's opinion of acceptability. Estimates of stick forces can be made if no reliable measurements are available or qualifying terms such as 'heavy', 'medium', or 'light' can be used to describe the forces. The point is that the difference in evaluating an aircraft qualitatively and quantitatively is a matter of degree. "Use what you've got". Pilot opinion supported by measured data is primary in qualitative testing, while the reverse is true in quantitative testing. The general rule is to first decide how well the aircraft does its job and then use the quantitative data you can get to support your opinion.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight Test System Identification written by Roger Larsson and published by Linköping University Electronic Press. This book was released on 2019-05-15 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the demand for more advanced fighter aircraft, relying on unstable flight mechanical characteristics to gain flight performance, more focus has been put on model-based system engineering to help with the design work. The flight control system design is one important part that relies on this modeling. Therefore, it has become more important to develop flight mechanical models that are highly accurate in the whole flight envelope. For today’s modern fighter aircraft, the basic flight mechanical characteristics change between linear and nonlinear as well as stable and unstable as an effect of the desired capability of advanced maneuvering at subsonic, transonic and supersonic speeds. This thesis combines the subject of system identification, which is the art of building mathematical models of dynamical systems based on measurements, with aeronautical engineering in order to find methods for identifying flight mechanical characteristics. Here, some challenging aeronautical identification problems, estimating model parameters from flight-testing, are treated. Two aspects are considered. The first is online identification during flight-testing with the intent to aid the engineers in the analysis process when looking at the flight mechanical characteristics. This will also ensure that enough information is available in the resulting test data for post-flight analysis. Here, a frequency domain method is used. An existing method has been developed further by including an Instrumental Variable approach to take care of noisy data including atmospheric turbulence and by a sensor-fusion step to handle varying excitation during an experiment. The method treats linear systems that can be both stable and unstable working under feedback control. An experiment has been performed on a radio-controlled demonstrator aircraft. For this, multisine input signals have been designed and the results show that it is possible to perform more time-efficient flight-testing compared with standard input signals. The other aspect is post-flight identification of nonlinear characteristics. Here the properties of a parameterized observer approach, using a prediction-error method, are investigated. This approach is compared with four other methods for some test cases. It is shown that this parameterized observer approach is the most robust one with respect to noise disturbances and initial offsets. Another attractive property is that no user parameters have to be tuned by the engineers in order to get the best performance. All methods in this thesis have been validated on simulated data where the system is known, and have also been tested on real flight test data. Both of the investigated approaches show promising results.
Download or read book Flight test guide for certification of transport category airplanes written by and published by . This book was released on 1986 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flying beyond the stall written by Douglas A. Joyce and published by . This book was released on 2014 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: The X-31 Enhanced Fighter Maneuverability Demonstrator was unique among experimental aircraft. A joint effort of the United States and Germany, the X-31 was the only X-plane to be designed, manufactured, and flight tested as an international collaboration. It was also the only X-plane to support two separate test programs conducted years apart, one administered largely by NASA and the other by the U.S. Navy, as well as the first X-plane ever to perform at the Paris Air Show. Flying Beyond the Stall begins by describing the government agencies and private-sector industries involved in the X-31 program, the genesis of the supermaneuverability concept and its initial design breakthroughs, design and fabrication of two test airframes, preparation for the X-31's first flight, and the first flights of Ship #1 and Ship #2. Subsequent chapters discuss envelope expansion, handling qualities (especially at high angles of attack), and flight with vectored thrust. The book then turns to the program's move to NASA's Dryden Flight Research Center and actual flight test data. Additional tasking, such as helmet-mounted display evaluations, handling quality studies, aerodynamic parameter estimation, and a "tailless" study are also discussed.The book describes how, in the aftermath of a disastrous accident with Ship #1 in 1995, Ship #2 was prepared for its outstanding participation in the Paris Air Show. The aircraft was then shipped back to Edwards AFB and put into storage until the late 1990s, when it was refurbished for participation in the U. S. Navy's VECTOR program. The book ends with a comprehensive discussion of lessons learned and includes an Appendix containing detailed information.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1973 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Automated Flight Test Management System written by and published by . This book was released on 1991 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Education written by and published by . This book was released on 1973 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
