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research-article

Homing Guidance Using Spatially Quantized Signals

[+] Author and Article Information
Ricardo Bencatel

Postdoctoral Researcher Department of Aerospace Engineering University of Michigan Ann Arbor, Michigan, 48109
bencatel@umich.edu

Dave W. Oyler

Ph.D. Candidate Department of Aerospace Engineering University of Michigan Ann Arbor, Michigan, 48109
dwoyler@umich.edu

Liang Liu

Undergraduate Student Department of Aerospace Engineering University of Michigan Ann Arbor, Michigan, 48109
liuliang@umich.edu

Danning Sun

Undergraduate Student Department of Aerospace Engineering University of Michigan Ann Arbor, Michigan, 48109
danning@umich.edu

Anouck R. Girard

Associate Professor Department of Aerospace Engineering University of Michigan Ann Arbor, Michigan, 48109
anouck@umich.edu

1Corresponding author.

ASME doi:10.1115/1.4035610 History: Received August 31, 2015; Revised December 15, 2016

Abstract

This paper considers homing guidance for a vehicle with a single omnidirectional receiver traveling to a stationary, omnidirectional transmitting beacon by using spatially quantized signal strength measurements. Two homing strategies are presented, and simulations are performed for cases with signal noise and vehicle turn rate limits. The first strategy is the Oyler strategy, which adapts a sliding mode controller and observer from previous work. The second strategy is based on constant heading changes each time a range increment is detected, and this strategy is shown to be sufficient for homing. This study also discusses a signal filter designed to improve the homing controllers' performance. Performance metrics are developed for strategy evaluation and parameter optimization. The performance of each guidance strategy is shown through simulations for a variety of conditions. The Oyler strategy guides the vehicle to the beacon more efficiently than the constant heading change strategy, but it comes with a slight penalty in success rate.

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