Eytan Pollak

• University of Central Florida

A distributed simulation system is composed of simulator stations linked over a network that each renders real-time video imagery for its user from scene data stored in its data storage. The simulation stations are each connected with a physics farm that manages the virtual objects in the shared virtual environment based on their physical attribute...

A distributed simulation system is composed of simulator stations linked over a network that each renders real-time video imagery for its user from scene data stored in its data storage. The simulation stations are each connected with a physics farm that manages the virtual objects in the shared virtual environment based on their physical attribute...

This paper proposes a new reactive control design for unicycle-type mobile robots with limited sensor range to track targets while avoiding static and moving obstacles in a dynamically evolving environment. With the relative motion among the mobile robot, targets, and obstacles formulated in polar coordinates, kinematic control laws achieving targe...

This paper studies the application of nonlinear cooperative control theory to the attitude synchronization problem. To this end, explicit conditions, in terms of vector nonlinear differential inequalities, is presented firstly to ensure both the Lyapunov stability and asymp-totically cooperative stability for a certain class of heterogeneous nonlin...

This paper addresses a new reactive control design for point-mass vehicles with limited sensor range to track targets while avoiding static and moving obstacles in a dynamically evolving environment. Towards this end, a multiobjective control problem is formulated and control is synthesized by generating a potential field force for each objective a...

In this chapter, a nonlinear control design is proposed for a team of wheeled mobile robots to cooperate in a dynamically evolving environment to track their virtual leader(s), while avoiding static and dynamic obstacles. Toward this end, a multi-objective control problem is formulated, and the control is synthesized by generating a potential field...

The study of unmanned aerial systems (UAS) has been an active research topic in recent years due to the rapid growth of UAS real-world applications driven by the Global War on Terrorism (GWOT). UAS are defined as a complete unmanned system including control station, data links, and vehicle. Unmanned aerial vehicle (UAV) refers to the vehicle elemen...

In this paper, cooperative stability and its robustness are studied for dynamical systems under a class of local-feedback cooperative control laws. Emphasis is placed upon cooperativeness and stability in the presence of such disturbances as communication noises and measurement errors. Concepts of (robust) cooperative stability are introduced, and...

The Distributed Interactive Simulation (DIS) IEEE-1278.1 standard is used in many military simulations. The binary data format for DIS does not lend itself to use in emerging web services standards or data analysis and storage tools because the data format is not recognized by most general purpose data manipulation tools. We examine an alternate XM...

As the US Department of Homeland Security works to create an integrated emergency response system, it is evident that computer-based solutions can support this process. Individual commercial simulation packages and databases can provide a partial solution, but are not easily integrated to provide a comprehensive analysis of the events. To achieve m...

Creating a simulation of a large enterprise system by manually coding all the details into a simulator tool is not just time consuming, but yields a system that is difficult to maintain. By separating the model-configuration data from the models, a higher level of automation can be achieved, and enhance the usefulness of the simulation. The underly...

Automated planning within the scope of middle level echelon decision making processes is beginning to receive increased research attention in an attempt to reduce the size of the support staff needed to conduct large scale command and staff training exercises. In order to better understand the issues involved, the requirements for this domain will...

A mathematical model of a single piston oscillating compressor is presented. The compressor is of the electrodynamic type. The model results in a set of non-linear equations in terms of piston displacement and current amplitude. The equations are solved by an iterative algorithm. Measurements on an existing compressor verified some of the results o...

The coil is suspended by two springs and the piston is connected to the coil. The driving force comes from the interaction of the current in the coil with a steady magnetic field which is produced by a permanent magnet. When the coil is connected to an alternating voltage source, the piston and the coil will curve at the input frequency. (from pape...