Density-Based Feedback Control for Earth Orbiting Swarms via Velocity Fields

On Manipulator Control via Velocity Fields

This paper addresses the control of robotic manipulators using the velocity field approach. Instead of the usual specification in motion robot control via desired position trajectories depending on time, the specification in the velocity field control formulation is given through a desired velocity vector field as a function of actual position regardless of time. This approach is useful for con...

Feedback Control of Evolving Swarms

We examine the effects of proportional-integral control on the fitness and genetics of an evolving swarm. Introducing controllers with a set point designed to distribute birds equally across the food in a given simulation increases the rate at which the birds accumulate energy, but also increases the rate at which they expire. We find that the amount of food the birds gather is not dependent on...

Two Earth - sized planets orbiting

Long Term Evolution of Earth Orbiting Objects

The evolution of the orbiting debris population larger than 1 mm has been simulated for 100 yr assuming four diierent space policy scenarios. The study was made possible by the development of two speciic software codes, including the relevant source and sink mechanisms and several model options. A sensitivity analysis has shown that the results are relatively insensitive to the adoption of diie...

Testbed for Development of a DSP-Based Signal Processing Subsystem for an Earth-Orbiting Radar Scatterometer

1 0-7803-7231-X/01/$10.00/© 2002 IEEE Abstract–A testbed for evaluation of general-purpose digital signal processors in earth-orbiting radar scatterometers is discussed. Because general purpose DSP represents a departure from previous radar signal processing techniques used on scatterometers, there was a need to demonstrate key elements of the system to verify feasibility for potential future s...