Abstract: In this article, the atmospheric flight of aeroassisted orbit transfer vehicle is investigated analytically. As the flight speed is greater than the first cosmic velocity, the centrifugal ...

Abstract: A neighboring extremal control method is proposed for discrete-time optimal control problems subject to a general class of inequality constraints. The approach is applicable to a broad class ...

Class A schools are starting to understand how transfers, low participation and injuries can derail a football season.

America can't afford to keep shooting down $50,000 drones with $2 million missiles. Coyote will be a lot cheaper. How much does the U.S. Army love its drones? Let me count the ways -- all $5 billion ...