This report describes the progress made in the first year (Sept. 1, 1999 LO Aug. 3 1,2000) of work at The University of Toledo under the NASA Information Technology (IT) Program grant number NAG-1-2244. This research is aimed at developing a neiv and advanced simulation framework that will significantly improve the overall efficiency of aerospace systems design and development. This objective w...

Job shop scheduling problems occurs in automobile industry, aerospace industry, printing industry, and chemical industry. Job shop scheduling problems are real world and complex. The present work assesses the effect of change in setup times levels on make span, maximum flow time and maximum tardiness measures. The model of the job shop is developed in PROMODEL simulation software. Three levels ...

The various industries such as automobile industry, aerospace industry, printing industry, and chemical industry operate on job shop system. Job shop scheduling problems are complex and real world. The present work assesses the effect of change in shop utilizations levels on total setups and mean setup time measures. The simulation model of the job shop is developed for investigation purpose. T...

Distributed platforms play an important role in aerospace remote sensing, radar navigation, and wireless communication applications. However, besides the requirement of high accurate time and frequency synchronization for coherent signal processing, the baseline between the transmitting platform and receiving platform and the orientation of platform towards each other during data recording must...

Although brush type DC machinery has lost market share over the years to its brushless counterparts, it still maintains a significant presence in the automotive, aerospace, power tool, and home appliance industries. Especially in automotive and aerospace power system applications, early detection of brush type DC machine faults will help to avoid problematic system failures, decrease maintenanc...

Complex software systems are becoming increasingly prevalent in aerospace applications, in particular to accomplish critical tasks. Ensuring the safety of these systems is crucial, while they can have subtly different behavior under slight variations in operating conditions. In this paper we advocate the use of formal verification techniques and in particular theorem proving for hybrid software...

Nonstandard tests are necessary for analyses and verification of new developed structural and technological solutions with application of composite materials. One of the most critical primary structural parts of a typical aerospace structure is T-joint. This structural element is loaded mainly in shear, bending, peel and tension. The paper is focused on the shear loading simulations. The aim of...

For reasons of stealth and other operational advantages, distributed aerospace wireless systems have received much attention in recent years. In a distributed aerospace wireless system, since the transmitter and receiver placed on separated platforms which use independent master oscillators, there is no cancellation of low-frequency phase noise as in the monostatic cases. Thus, high accurate ti...

Image Analysis and Computer Simulation of Nanoparticle Clustering in Combustion Systems Y. H. Chen a , S. D. Bakrania a , M. S. Wooldridge a b & A. M. Sastry a c d a Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan, USA b Department of Aerospace Engineering, University of Michigan, Ann Arbor, Michigan, USA c Department of Biomedical Engineering, University of Mi...