Award Date

1-1-2003

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Computer Science

First Committee Member

Laxmi P. Gewali

Number of Pages

83

Abstract

We consider the problem of developing fast algorithms for computing short collision-free paths for aerial vehicles in the presence of obstacles and enemy radar installations. When aerial vehicles are deployed in such regions, it is critical to compute admissible paths having reduced exposure to threats. The generalized version of this problem is known to be NP-hard [4]. We consider simplified versions in two dimensions. One of the specific problems we address is to adjust a given k-legged trajectory to reduce exposure to threats. We also propose an algorithm to compute a k-legged risk-reduced path using a stage graph which runs in 0(m 2p) time where m is the number of vertices per turn region and p is the number of radar and obstacle polygon edges. In addition, we describe methods for obtaining multiple risk-reduced paths and node disjoint paths from the stage graph. We also discuss the implementation of the proposed algorithms.

Keywords

Planning; Presence; Regions; Risk; Trajectory

Controlled Subject

Computer science

File Format

pdf

File Size

3000.32 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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