This paper presents an introduction to capturing software requirements in the PVS formal language. The object of study is a simpli ed digital autopilot that was motivated in part by the mode control panel of NASA Langley's Boeing 737 research aircraft. The paper rst presents the requirements for this autopilot in English and then steps the reader through a translation of these requirements into...

Previously, we have looked at the stability augmentation system. This system can be seen as the inner loop of the aircraft control system. In this chapter, we focus on the outer loop: the control augmentation system. When we want to keep a certain pitch angle, velocity, roll angle, heading, or something similar, then we use the CAS. In this way, the pilot workload can be reduced significantly. ...

Equipping a fixed wing unmanned air vehicle (UAV) with low-level autopilots, we derive high-level velocity and roll angle control laws for the UAV. Backstepping techniques are applied to design the velocity and roll angle control laws from known velocity and heading angle control laws that explicitly account for velocity and heading rate constraints of the UAV. Regarding unknown autopilot const...

The objective of this paper is to describe the design and implementation of a small semiautonomous fixed-wing unmanned air vehicle. In particular we describe the hardware and software architectures used in the design. We also describe a low weight, low cost autopilot developed at Brigham Young University and the algorithms associated with the autopilot. Novel PDA and voice interfaces to the UAV...

Unmanned surface vehicles (USVs) are now being used in a variety of missions including, surveillance, weapon delivery, shallow water surveying, coordination with underwater vehicles to name but a few. The performance of these unmanned systems is crucial in obtaining the required information from a given mission. The onboard navigation, guidance and control (NGC) systems, working in tandem, dict...

of Thesis Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Master of Science DEVELOPMENT OF UNMANNED AERIAL VEHICLE (UAV) FOR WILDLIFE SURVEILLANCE By Kyuho Lee December 2004 Chair: Peter G. Ifju Major Department: Mechanical and Aerospace Engineering This thesis presents the design, fabrication, capabilities, and analysis...

A paper describes a method of motion control of the underwater robotic vehicle to the problem of trajectory tracking. A multidimensional non-linear model expresses the robot’s dynamics. Command signals are generated by an autopilot consisting of three independent controllers with a parameter adaptation law implemented. A quality of control is concerned without and in presence of environmental d...

In this paper a full order observer has been designed using generalized matrix inverse. The design method resolves the state vector into two unique components, of which one is known and the other is unknown. This method does not assume any structure of the observer and imposes no restriction on the output distribution matrix. Condition of existence of such observer is presented with proof. An i...

With the evolution of high power density battery, cheap air frames, powerful microprocessors etc. Unmanned aerial vehicle (UAV) started playing a great role in various areas like traffic monitoring, aerial surveillance, hurricane hunting and so on. The UAV's used for these purposes are usually flown at low altitudes, almost below 1000m. Flying at such low altitudes make the UAV easy to crash. T...