Arnar Hjartarson

Blue Origin

This paper describes the LPVTools software suite developed by MUSYN Inc. LPVTools is a MATLAB toolbox for simulation, analysis, and design of parameter dependent control systems using the Linear Parameter-Varying (LPV) framework. LPVTools contains data structures to represent both LFT and gridded (Jacobian-linearization) types of LPV systems. In ad...

This paper considers the performance of a gain scheduled flight control law for an aeroelastic aircraft. A nonlinear aeroelastic model of the Rockwell B-1 Lancer is used as the application example. Gain scheduling via interpolation of point designs is the predominant method used in industry to develop a full-envelope flight control law. Certificati...

LPVTools is a MATLAB toolbox that is being developed to perform gain-scheduled Linear Parameter-Varying (LPV) control of aeroservoelastic systems. This paper outlines the LPV modeling, analysis and controller synthesis features of this toolbox. The features of the toolbox are illustrated by an application example, where a grid-based LPV model is de...

Several decades of aerospace research have yielded a variety of advanced algorithms that have the potential to improve the performance, safety, and reliability of next-generation air vehicles. These algorithms include diagnostic and prognostic systems, inner-loop controllers, and guidance and path planning systems. Many of the new algorithms dier s...

Supercavitation is when a cavity is made to envelop a submerged body. Supercavitation can be used to achieve an order of magnitude reduction in drag on underwater vehicles. Supercavitating vehicles can reach unprecedented speeds underwater. Supercavitation has reportedly been used to create underwater vehicles that reach speeds of 370 km/h, which i...

The use of supercavitation to enable marine vehicles to travel at extraordinary speeds is a topic of considerable interest. The control of these vehicles pose new issues not faced with fully wetted vehicles due to a complex interaction between the vehicle and the cavity that it rides in. Existing models make many assumptions that may not be valid f...