The procedures to assess the critical aeroelastic state of an aircraft with the AESIM simulation method are described. The main innovation is the identification with MIMO-class methods which opens up possibilities for efficient usage of aeroelastic simulation methods. Experience with recent applications is reported. ANALYSIS OF COMPUTATIONAL AEROELASTIC SIMULATIONS BY FITTING TIME SIGNALS Micha...

1 Larry G. Richards, University of Virginia, Mechanical and Aerospace Engineering, Charlottesville, Va. 229044746 Phone: 434 924 3191, [email protected] 2 Gabriel Laufer University of Virginia, Mechanical and Aerospace Engineering, [email protected] 3 Joseph A.C. Humphrey, University of Virginia, Mechanical and Aerospace Engineering, [email protected] Abstract The Virginia Middle Schools Enginee...

In this study, three-dimensional simulations of xenon plasma plume flow fields from a cluster of four Hall thrusters are performed with a hybrid particle-fluid method on unstructured meshes. In these simulations, a detailed fluid model is used to compute the electron properties, the direct simulation Monte Carlo method models the collisions of heavy particles and the Particle-In-Cell method mod...

The choice of a suitable material model to simulate process induced distortions is important in order achieve right first time approach the design new moulds. This work investigates ability Cure Hardening Instantaneously Linear Elastic (CHILE) and linear viscoelastic predict an aerospace composite frame. models were coupled with cure kinetics chemical shrinkage capture multi-physics phenomena t...

a long time ago, since the launch of the first artificial satellite in 1957, controling attitude of satellites has been considered by the designers and engineers of aerospace industry. considering the importance of this issue various methods of control in response to this need have been presented and analyzed until now. in this paper, we propose and analyze a three-axis optimal control on the s...

Some new results for a classical minimum time, rest-to-rest maneuver problem are presented. An inertially symmetric rigid body is considered. For the case that the magnitude of the control is constrained while the control direction is left free, we analytically prove that the eigenaxis maneuver is the time minimum solution by using the Pontryagin’s principle. For the case that the three compone...

This chapter presents an H∞ filtering framework for cloud-aided semiactive suspension system with time-varying delays. In this system, road profile information is downloaded from a cloud database to facilitate onboard estimation of suspension states. Time-varying data transmission delays are considered and assumed to be bounded. A quarter-car linear suspension model is used and an H∞ filter is ...

Deployable membrane structures have received wide attention in many engineering applications, such as the military, aerospace, and aviation. Their properties of light weight high storage ratio meet requirements for aerospace exactly. In this paper, wrapping deployment inspired by leaves are simulation-analyzed prospective improvement. Three leaf-inspired patterns investigated discussed from cor...

This paper describes a simulation model that has been used for controller design and stability and performance analysis of a micro X-CELL helicopter as central element of the Autonomous Scout Rotorcraft Testbed (ASRT) developed at Georgia Institute of Technology, Atlanta, USA. The general model, simple, yet comprehensive and efficient for the task at hand, consists of the following elements: he...

Multiple output DC-DC converters are widely used in many applications such as aerospace, industrial and medical equipments. The purpose of this paper is to present an intelligent control system for the multiple output DC-DC converters. In order to perform this purpose, a double ended forward DC-DC converter with three output voltages (+5 V/ 50W, +15 V/ 45W and -15 V/ 15W) is considered and anal...