A recently developed nonlinear controller called theta-D and the Higher Order Sliding Mode (HOSM) control are the centerpiece around which an Integrated Guidance and Control (IGC) scheme and a nonlinear filter technique are built to enhance the lethality of hit-to-kill interceptors and offer a means… More

This proposal continues on the successful Integrated Guidance and Control techniques developed through the Phase I effort. A new VIGC formulation has been shown to yield good preliminary results. Research during Phase II will develop IGC algorithms with an optimal approach, with an inner loop-outer… More

This proposal will develop new filter and guidance algorithms and demonstrate their effectiveness in a 6 degrees-of-freedom missile-target simulator. The new algorithms for the filters will be based on a)optimal estimation b)sliding mode c) neural networks and d)partcle filters. The guidance… More

Spacecraft need accurate position and velocity estimates in order to control their orbits. Some missions require more accurate estimates than others, but nearly all missions need some type of orbit determination. IST-Rolla seeks to provide highly accurate algorithms that do not overpower the… More

This proposal seeks to develop guidance algorithms and estimation schemes to intercept targets when they are boosting or on their ascent trajectory. Effective algorithma to work against such threats need to be robust, efficient and accurate due to the uncertainies in the target burn times and their… More

IST-Rolla developed two nonlinear filters for spacecraft orbit determination during the Phase I contract. The theta-D filter and the cost based filter, CBF, were developed and used in various orbit determination scenarios. The scenarios were application to low Earth orbit, range only, and range and… More

ABSTRACT: This proposal seeks to develop a novel tool wear monitoring technology using a neural network-based observer. In this methodology simple models of the wear process and another related machining process, such as force, are developed. The model development does not require lengthy analysis… More