Design and evaluation of LNAV/VNAV guidance algorithms for time-of-arrival error characterization

Xiaoli Bai, Sai Vaddi, Yiyuan Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations

Abstract

This paper develops 3D-path tracking algorithms to simulate the Lateral Navigation (LNAV) and Vertical Navigation (VNAV) capabilities found in current day aircraft flight management systems. The LNAV/VNAV capability is realized using two modules: (i) Reference Trajectory Synthesis Module, and (ii) LNAV/VNAV Guidance Module. A separate paper deals with the Reference Trajectory Synthesis Module. The focus of the current paper is the design and evaluation of LNAV/VNAV Guidance Module. The guidance module is formulated as a reference-trajectory tracking controller. The control laws are based on single-input single-output linear feedback control principles. The outputs from the guidance module are: (i) bank-angle command, (ii) coefficient-of-lift command, (iii) thrust command, and (iv) spoiler drag command. The guidance module is evaluated on a simulation that models aircraft point-mass dynamics, bank-angle auto-pilot dynamics, pitch-axis auto-pilot dynamics, engine lag dynamics, atmospheric forecast model, and a realistic forecast uncertainty model. Test scenarios include A320 and MD82 aircraft flying along different arrival routes into San Francisco and Los Angeles International airports. Monte-Carlo simulation framework is used to estimate the time-of-arrival uncertainty associated with a A320 LNAV/VNAV flight.

Original languageEnglish (US)
Title of host publication2013 Aviation Technology, Integration, and Operations Conference
StatePublished - 2013
Externally publishedYes
Event2013 Aviation Technology, Integration, and Operations Conference - Los Angeles, CA, United States
Duration: Aug 12 2013Aug 14 2013

Publication series

Name2013 Aviation Technology, Integration, and Operations Conference

Other

Other2013 Aviation Technology, Integration, and Operations Conference
Country/TerritoryUnited States
CityLos Angeles, CA
Period8/12/138/14/13

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Mechanical Engineering

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