Journal of Intelligent & Robotic Systems

, Volume 73, Issue 1–4, pp 187–195

Pitch Loop Control of a VTOL UAV Using Fractional Order Controller

  • Jinlu Han
  • Long Di
  • Calvin Coopmans
  • YangQuan Chen
Article

Abstract

Pitch loop control is the fundamental tuning step for vertical takeoff and landing (VTOL) unmanned aerial vehicles (UAVs), and has significant impact on the flight. In this paper, a fractional order strategy is designed to control the pitch loop of a VTOL UAV. First, an auto-regressive with exogenous input (ARX) model is acquired and converted to a first-order plus time delay (FOPTD) model. Next, based on the FOPTD model, a fractional order [proportional integral] (FO[PI]) controller is designed. Then, an integer order PI controller based on the modified Ziegler-Nichols (MZNs) tuning rule and a general integer order proportional integral derivative (PID) controller are also designed for comparison following three design specifications. Simulation results have shown that the proposed fractional order controller outperforms both the MZNs PI controller and the integer order PID controller in terms of robustness and disturbance rejection. At last, ARX model based system identification of AggieAir VTOL platform is achieved with experimental flight data.

Keywords

VTOL UAV Fractional order controller Attitude control Pitch loop control ARX model FOPTD PID MZN PI FO[PI] 

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Jinlu Han
    • 1
    • 2
  • Long Di
    • 3
  • Calvin Coopmans
    • 1
  • YangQuan Chen
    • 4
  1. 1.Department of Electrical and Computer EngineeringUtah State UniversityLoganUSA
  2. 2.College of Control Science and EngineeringShandong UniversityShandongChina
  3. 3.Charles L. Brown Department of Electrical and Computer EngineeringUniversity of VirginiaCharlottesvilleUSA
  4. 4.MESA Lab and Faculty of School of EngineeringUniversity of CaliforniaMercedUSA

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