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Viewing 1 to 30 of 6887
Event
2015-06-22
This session focuses on the development and application of analytical methods for characterizing the dynamic behavior of structural systems. Analysis methods for all structural components, subsystems and complete systems found in automotive vehicles will be considered, except for powertrain and driveline which are covered in Powertrain Structural Analysis session. Examples include (but are not limited to) body structure, chassis structure, seats and interior structures.
Event
2015-06-22
The focus of the Structural Analysis session is to share experiences on analyzing, testing, and developing solutions to structural noise and vibration problems from powertrain sources. Analytical modeling, experimental testing and predictive correlation are just a few of the tools used in this endeavor.
Event
2015-06-22
This session covers static and dynamic issues in the body and chassis that contribute to noise and vibration problems in vehicles. Included in this session are modal studies, measurement and analysis methods, transfer path analysis, design guidelines, and recommended practices for noise and vibration control of the body and chassis.
Event
2014-10-14
In response to global demands for environmental conservation, the automotive industry is placing greater focus on the development of fuel-efficient technologies to help reduce global CO2 emissions. With the aim of simultaneously improving fuel economy and driveability, TOYOTA has developed a new continuously variable transmission (CVT) vehicles in North America equipped with a 1.8-liter engine [1]. This new CVT features various technologies for improving fuel economy, including: the world's first coaxial 2-discharge port oil pump system, wider ratio coverage, a flex start system, low-viscosity CVT fluid, and a higher final gear ratio. This paper outlines the configuration, characteristics, performance, and new technologies of this CVT
Event
2014-09-24
This session addresses all facets of aircraft lighting equipment–design, manufacture, operation, maintenance, and in-service experience. It will explore standards pertaining to aircraft lighting and lighting emission sources which will fulfill the needs and requirements of operational control and utility, including all lighting on and in an aircraft and under its control.
Event
2014-09-24
This session is dedicated to topics dealing with the integration between the Powerplant system & the airframe. This session covers the physical & functional interfaces between the different components, and their aerodynamic, thermal, structural, loads & Dynamic integration. This session covers: the Engine, Nacelle, Pylon & associated local sub systems (Fuel, Bleed, Oil, Fire, Etc).
Technical Paper
2014-09-16
Darcy Allison, Edward Alyanak
The design challenges associated with advanced supersonic aircraft are best handled with a multidisciplinary approach. These aircraft are highly coupled in that small changes to one subsystem can have far-reaching effects on others. For the class of aircraft called the efficient supersonic air vehicle (ESAV), particular attention must be paid to the propulsion system design as a whole including installation effects in the airframe design. The propulsion system assumed for the ESAV is a three-stream variable cycle engine. A computational model has been built with the Numerical Propulsion System Simulation (NPSS) software to analyze this engine. Along with the variable cycle NPSS model, a three-ramp external compression inlet model meant for conceptual design has been developed. This inlet model will be used to capture installation effects so that they are accounted for during the aircraft conceptual design. The NPSS and inlet models are parameterized so that they can be used in a multidisciplinary design optimization (MDO) process.
Technical Paper
2014-09-16
Rudolf Neydorf, Youriy Sigida
Identification of propeller traction power specifications in aircraft mathematical description problems Under the mathematical simulation of the aircraft dynamic motion, an identification problem for a number of constants and functions which cannot be analytically calculated appears. Dependences of aerodynamic gap coefficients of the aircraft body and the airflow, as well as the traction power specifications of the active propulsors used in flight by the aircraft, are related to such functions. Nowadays, propellers only are used in the airships and other aerial vessels with the aerostatic keeping in-flight principle. In the automatic flight control systems, they act as actuation devices. When constructing a mathematical aircraft model, the thrust developed by the propulsor is often taken for an input control. However, there are a great many phases of transforming forces, moments, and kinds of energy, between the real input control (customarily, it is introducing fuel or power supply to the servomotor input) and the rotor thrust load.
Technical Paper
2014-09-16
Peter B. Zieve, Osman Emre Celek, John Fenty
Abstract The E7000 riveting machine installs NAS1097KE5-5.5 rivets into A320 Section 18 fuselage side panels. For the thinnest stacks where the panel skin is under 2mm (2024) and the stringer is under 2mm (7075), the normal process of riveting will cause deformation of the panel or dimpling. The authors found a solution to this problem by forming the rivet with the upper pressure foot extended, and it has been tested and approved for production.
Technical Paper
2014-09-16
Andre Hessling
Reducing maintenance and improving safety for commercial aircraft can at times oppose each other. Advanced technologies in LED’s and Super-capacitors have the potential to reduce maintenance and improve safety for aircraft. By introducing LED’s and Super-capacitors the performance profiles of these technologies require a rethinking of the Lighting systems and equipment setups. Rewriting Lighting System requirements allow for greater design solutions which will provide better Lighting products to support operators which will in turn make them more profitable and improve safety over products that are flying today. Two examples are presented: an LED Landing Light and a Supercap based emergency light. 1) Aircrafts need adequate illumination for night time landing. Currently this requirement is met via high power halogen lamp or HID lights. Useful light for the pilot is a combination of intensity and direction. Too much light in undesired direction can cause excessive halation in adverse weather conditions forcing the pilots to shut down the lights entirely.
Technical Paper
2014-09-16
Matthieu Hutchison, Grégoire Lenoble, Umberto Badiali, Yannick Sommerer, Olivier Verseux, Eric Desmet
Fuel pressure surge is an essential topic for modern aircrafts and a main driver for airframe fuel system sizing. This phenomenon can occur both during normal and abnormal operations, notably resulting from a sudden change of fluid velocity due to the opening or closure of an engine valve. During aircraft development phase, Airbus specifies to engine manufacturers a pressure limit at the interface between the engine and airframe. The verification activities performed by engine manufacturers shall then ensure that the maximum pressure surge will not exceed these requirements. The purpose of this paper is to present the methodology developed by Airbus with the support of LMS Engineering (a Siemens PLM Software division) for the assessment of accurate fuel pressure surge at early program stages in the complete aircraft and engine environment. This methodology will help to avoid late airframe fuel system redesign and secure entry-into-service by driving the engine manufacturer verification & validation process.
Technical Paper
2014-09-16
Lutz Neugebauer
The demand of fulfilling increasing Prime Customer requirements forces Tier 1 suppliers to continually improve their system solutions. Typically, this will involve integration of “state of the art” tools to afford the Tier 1 supplier a throughput and cost advantage. The subject “Production Optimization Approach” addresses the machine and process optimization of automated fastening machines in operation at customer factories. The paper will describe and focus on the main aspects of production optimization of existing machines to meet and exceed the required customer production and reporting criteria. Furthermore, the paper will present existing examples based on use of the established diagnostic tools
Technical Paper
2014-09-16
Thomas G. Jefferson, Svetan Ratchev, Richard Crossley
Abstract Aerospace assembly systems comprise a vast array of interrelated elements interacting in a myriad of ways. Consequently, aerospace assembly system design is a deeply complex process that requires a multi-disciplined team of engineers. Recent trends to improve manufacturing agility suggest reconfigurability as a solution to the increasing demand for improved flexibility, time-to-market and overall reduction in non-recurring costs. Yet, adding reconfigurability to assembly systems further increases operational complexity and design complexity. Despite the increase in complexity for reconfigurable assembly, few formal methodologies or frameworks exist specifically to support the design of Reconfigurable Assembly Systems (RAS). This paper presents a novel reconfigurable assembly system design framework (RASDF) that can be applied to wing structure assembly as well as many other RAS design problems. The framework is a holistic, hierarchical approach to system design incorporating reconfigurability principles, Axiomatic Design and Design Structure Matrices.
Technical Paper
2014-09-16
Rainer Mueller, Matthias Vette, Andreas Ginschel, Ortwin Mailahn
Abstract The global competition challenges aircraft manufacturers in high wage countries. The assembly of large components happens manually in fixed position assembly. Especially the completion of the inner fuselage structure is done 100% manually. The shells have to be joined with rivets and several hundred clips have to be assembled to connect the shell to the frames. The poise of the worker is not ergonomic so a lot of physical stress is added to the worker and minimizes the working ability. Aircraft manufacturers need a lot of different production resources and qualified persons for the production, which provokes higher costs. Due to these high costs there is a demand for automated reconfigurable assembly systems, which offer a high flexibility and lower manufacturing costs. The research project “IProGro” deals with this challenge and develops innovative production systems for large parts. On one hand the flexibility is reached by a reconfigurable fixture for the components on the other hand it is achieved by assistance systems, which guide staff during assembly processes.
Viewing 1 to 30 of 6887

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