English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

This paper presents two control algorithms enabling a UAV to circumnavigatean unknown target using range and range rate (i.e., the derivative of range)measurements. Given a prescribed orbit radius, both control algorithms (i) tendto drive the UAV toward the tangent of prescribed orbit when the UAV is outsideor on the orbit, and (ii) apply zero control input if the UAV is inside thedesired orbit. The algorithms differ in that, the first algorithm is smooth andunsaturated while the second algorithm is non-smooth and saturated. Byanalyzing properties associated with the bearing angle of the UAV relative tothe target and through proper design of Lyapunov functions, it is shown thatboth algorithms produce the desired orbit for an arbitrary initial state. Threeexamples are provided as a proof of concept.

Circumnavigation of an Unknown Target Using UAVs with Range and Range Rate Measurements