Download or read book Advanced Fluidic Controls for Integrated Propulsion Systems Part V Reliability Study of an Integrated Propulsion System Control Using Fluidic Control Techniques written by Eugene A. Peterson and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: A reliability study of the fluidic Integrated Propulsion Control was conducted. Since there was essentially no reliability precedence in the fluidics area, the program was developed through the application of current reliability techniques to fluidics. This study resulted in an estimated reliability of 3360 hours mean-time-between-failure (MTBF). This is approximately 3.5 times that estimated for an equivalent hydromechanical of electromechanical control system. In addition to the reliability estimate, a failure effects/fail safety analysis was conducted at the subsystem level. Several critical or potentially critical failure modes were uncovered. Also several reliability tests of fluidic components were conducted. These included life tests and contamination tests. Maintenance free operation in excess of 15,000 hours is indicated by the life tests. The contamination tests indicate that if contamination levels are maintained at less than 1.0 mg per cubic foot of air (about 20 times the level of normal air) that the performance of the amplifiers of the size used in the control system would not be degraded. (Author).

Download or read book Advanced Fluidic Controls for Integrated Propulsion Systems Part IV Demonstration of an Integrated Propulsion System Control at Simulated Flight Conditions Using Fluidic Control Techniques written by Ralph H. Pamperin and published by . This book was released on 1968 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Feasibility of a fluidic control system for advanced integrated propulsion system control was demonstrated at simulated flight conditions in an altitude engine test cell. System studies were conducted using control and engine computer simulations to develop advanced propulsion system control modes. Using fluidic sensors and computational elements developed under this program, a fluidic integrated propulsion control system was mechanized and evaluated on a J95-GE-5 engine at the Air Force Aero Propulsion Laboratory at simulated Mach numbers and altitudes. Performance capability was demonstrated in the areas of start up, speed control, transient control, compressor stability control, turbine overtemperature control, overspeed control and variable engine geometry control. (Author).

Download or read book Advanced Fluidic Controls for Integrated Propulsion Systems Part III Fluidic Techniques for Multiple Engine Thrust Stability Control written by Robert F. Waters and published by . This book was released on 1968 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: A feasibility demonstration of a fluidic attitude control system for the hover control of a turbojet powered VTOL aircraft was made. The demonstration was conducted on a special ground-based VTOL simulator which contains two J-85 turbojet engines. The aircraft configuration dictated that attitude control in the pitch axis be achieved by thrust modulation of the engines, and that control in the roll and yaw axes be achieved by reaction jets powered by compressor discharge air from the engines. Therefore, two systems were developed. Attitude information is supplied by a gimbal-less hybrid attitude sensor which has a pneumatic output. Rate damping is provided by a vortex rate sensor having no moving parts. Amplification and summing of sensor inputs is accomplished using small beam-deflection type fluid amplifiers. The pitch axis attitude information is supplied to fluidic engine fuel controls to accomplish thrust modulation. The roll axis attitude information is supplied through fluidic pulse width modulators to the reaction jets, which are large bistable supersonic fluid amplifiers. Feasibility was demonstrated using breadboard hardware. No attempt was made to develop production type fabrication techniques of fluid components or any integrated packaging schemes. Existing fluidic components were used where possible with development limited to that necessary to meet the system requirements established by VTOL handling qualities studies conducted early in the program. (Author).

Download or read book Advanced Fluidic Controls for Integrated Propulsion Systems Part I Fluidic Sensing Computation and Logic Components written by Robert F. Waters and published by . This book was released on 1968 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Integrated Propulsion Control System (IPC) was developed using hybrid computer techniques. The system consisted of an inlet control system, an engine control system, and an exhaust nozzle control system. The IPC was mechanized with fluidic subsystems and components. A J85-GE-5 engine was used as the test vehicle to demonstrate the feasibility and capability of the engine control and exhaust nozzle control system to control the engine from sea level static to Mach 2, 40,000 feet altitude inlet conditions. Steady state control is achieved through closed loop speed control; acceleration through closed loop control of turbine inlet temperature. This volume of the final report discusses the development of the fluidic sensing, computation and logic components. These components include fluid amplifiers, computation circuits, compensation networks, both analog and pulse type speed sensors, temperature sensors, a pressure regulator, filters, a fuel valve, fuel pumps, fluid potentiometers, and the concepts and techniques for packaging the components and circuits into a control system. (Author).

Download or read book Advanced Fluidic Controls for Integrated Propulsion Systems Part II Materials and Fabrication Techniques for High Temperature Turbine Engine Controls written by Kenneth E. Solie and published by . This book was released on 1968 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of materials and fabrication techniques for fluidic components used in fluidic fuel control systems for advanced propulsion systems was conducted. The program consisted of: (1) materials selection, (2) materials evaluation and (3) fabrication techniques suitable for the usable materials. A literature survey was made to select materials that could be used for fluidic components that must operate at various temperature ranges from 500 F to 3000 F. These candidate materials were evaluated under simulated operating conditions to assess their comparative behavior and ability to withstand the anticipated environment. Several methods of fabricating the selected materials, which ranged from aluminum to ceramics, were investigated. These techniques included standard machining practices, engraving, stamping, casting, etching-diffusion-bonding, electroforming, flame spraying, and several powder metallurgy processes. For use at temperatures below 800 F aluminum appears to be the best material. Precision engraving can be used for fabrication of small numbers of these devices, but etching-diffusion-bonding or powder metallurgy with EDM cleanup is better for high volume. Nickel devices fabricated by electroforming are best for temperatures below 1200 F. For temperatures between 1000 F and 1500 F, 309 stainless steel, fabricated by etching-diffusion-bonding should be used. Either Inconel 702 or Chrome 30 are good between 1500 F and 1800 F. Above 1800 F up to 3000 F KT silicon carbide was the only material investigated capable of prolonged life and capable of withstanding thermal shock. (Author).

Download or read book Integrated Flight and Propulsion Controls for Advanced Aircraft Configurations written by Walter C. Merrill and published by . This book was released on 1995 with total page 18 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 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ASME 68 GT 60 written by E. G. Johnson and published by . This book was released on 1968 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nasa Glenn Research in Controls and Diagnostics for Intelligent Aerospace Propulsion Systems written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-06 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increased emphasis on aircraft safety, enhanced performance and affordability, and the need to reduce the environmental impact of aircraft, there are many new challenges being faced by the designers of aircraft propulsion systems. Also the propulsion systems required to enable the NASA (National Aeronautics and Space Administration) Vision for Space Exploration in an affordable manner will need to have high reliability, safety and autonomous operation capability. The Controls and Dynamics Branch at NASA Glenn Research Center (GRC) in Cleveland, Ohio, is leading and participating in various projects in partnership with other organizations within GRC and across NASA, the U.S. aerospace industry, and academia to develop advanced controls and health management technologies that will help meet these challenges through the concept of Intelligent Propulsion Systems. The key enabling technologies for an Intelligent Propulsion System are the increased efficiencies of components through active control, advanced diagnostics and prognostics integrated with intelligent engine control to enhance operational reliability and component life, and distributed control with smart sensors and actuators in an adaptive fault tolerant architecture. This paper describes the current activities of the Controls and Dynamics Branch in the areas of active component control and propulsion system intelligent control, and presents some recent analytical and experimental results in these areas.

Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1979 with total page 1186 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 1988 with total page 1142 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Propulsion System Modeling and Integrated Controls Optimization written by Ira E. Marvin and published by . This book was released on 1967 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: The demand for higher performance from turbo-propulsion systems has led to development of engines and inlets with more variable geometry features and more modes of operation. As a result the problems of designing suitable control systems have been greatly magnified. Engines and inlets with their individual controls are usually developed by different corporate entities and there have been very important obstacles to the development of compatible control systems which can provide for the maximum propulsion system capabilities. The course of action which was taken in this program was to develop mathematical computer programs and techniques which permit an early interchange between engine and inlet development organizations of comprehensive and precise dynamic performance characteristics of their respective systems. This course also permits more effective monitoring by the sponsoring Military agency. This report describes digital computer techniques, modeling structures, demonstration models and propulsion system disturbance functions which may be effectively used in controls systems development. Means for integrating engine and inlet dynamic controls functions are reviewed and a digital computer design optimizing program is applied to control gains adjustment of integrated propulsion system models for both turbojet and turbofan engines. New model techniques and structures are evaluated against available test data. (Author).

Download or read book Flight determined Benefits of Integrated Flight propulsion Control Systems written by James F. Stewart and published by . This book was released on 1992 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Integrated Model Based Controls and PHM for Improving Turbine Engine Performance Reliability and Cost written by and published by . This book was released on 2009 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of high performance military aircraft propulsion systems continues to become more complex in response to increasingly demanding operational and multiple mission needs. Propulsion systems of the future will require adaptive engine control to enable precise and repeatable performance within stringent reliability, safety and cost constraints. In order to achieve performance that meets these requirements, propulsion control systems must evolve towards advanced designs with multivariable control systems and integrate numerous systems, including inlet, exhaust, power and bleed extraction, electrical power, thermal and environmental management, fuel, starting, accessories, aircraft flight control, and often propellers, open rotors, or lift fans. Due to the significant growth in complexity and number of control variables coupled with the demands of multivariable implementation, software development and verification tools must support model-based development and cost effective validation and verification strategies.

Download or read book Propulsion Controls and Diagnostics Research at NASA Glenn Research Center written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-20 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the increased emphasis on aircraft safety, enhanced performance and affordability, and the need to reduce the environmental impact of aircraft, there are many new challenges being faced by the designers of aircraft propulsion systems. Also the propulsion systems required to enable the National Aeronautics and Space Administration (NASA) Vision for Space Exploration in an affordable manner will need to have high reliability, safety and autonomous operation capability. The Controls and Dynamics Branch (CDB) at NASA Glenn Research Center (GRC) in Cleveland, Ohio, is leading and participating in various projects in partnership with other organizations within GRC and across NASA, the U.S. aerospace industry, and academia to develop advanced controls and health management technologies that will help meet these challenges through the concept of Intelligent Propulsion Systems. This paper describes the current activities of the CDB under the NASA Aeronautics Research and Exploration Systems Missions. The programmatic structure of the CDB activities is described along with a brief overview of each of the CDB tasks including research objectives, technical challenges, and recent accomplishments. These tasks include active control of propulsion system components, intelligent propulsion diagnostics and control for reliable fault identification and accommodation, distributed engine control, and investigations into unsteady propulsion systems. Garg, Sanjay Glenn Research Center CONTROL THEORY; ACTIVE CONTROL; FAULT DETECTION; PROPULSION SYSTEM CONFIGURATIONS; DISTRIBUTED PARAMETER SYSTEMS; ENGINE CONTROL; SAFETY; RELIABILITY; NASA PROGRAMS

Download or read book International Aerospace Abstracts written by and published by . This book was released on 1977 with total page 1240 pages. Available in PDF, EPUB and Kindle. Book excerpt: