FPGA Based Longitudinal and Lateral Controller Implementation for a Small UAV
This paper presents implementation of attitude controller for a small UAV using field programmable gate array (FPGA). Due to the small size constrain a miniature more compact and computationally extensive; autopilot platform is needed for such systems. More over UAV autopilot has to deal with extremely adverse situations in the shortest possible time, while accomplishing its mission. FPGAs in the recent past have rendered themselves as fast, parallel, real time, processing devices in a compact size. This work utilizes this fact and implements different attitude controllers for a small UAV in FPGA, using its parallel processing capabilities. Attitude controller is designed in MATLAB/Simulink environment. The discrete version of this controller is implemented using pipelining followed by retiming, to reduce the critical path and thereby clock period of the controller datapath. Pipelined, retimed, parallel PID controller implementation is done using rapidprototyping and testing efficient development tool of “system generator", which has been developed by Xilinx for FPGA implementation. The improved timing performance enables the controller to react abruptly to any changes made to the attitudes of UAV.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1081221Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2918
 Shashikala Narasimha Murthy, Wendy Alvis, Rakesh Shirodkar, Kimon Valavanis and Wilfrido Moreno, "Methodology for Implementation of Unmanned Vehicle Control on FPGA Using System Generator" in Proceedings of the 7th International Conference on Devices,Circuits and Systems,Mexico,Apr 28-30,2008.
 W.Alvis, S.Murthy, K. Valavanis, W. Moreno, S. Katkoori , "FPGA Based Flexible Autopilot Platform for Unmanned Systems" in Proceedings of the 15th Mediterranean Conference on Control & Automation , july 27-29 , Athens -Greece.
 Amol A.Kalage, Vasant M.Jape, Sarika V. Tade, Manik M.Hapse, Ravindra G. Dabhade, "Modeling & Simulation of FPGA based direct Torque Control of Induction Motor Drive" ,International Journal of recent trends in Engineering, Vol 1, No.4,May 2009.
 Angkul Kongmunvattana and Prabhas Chongstitvatana, "A FPGA based behavioral Control System for a Mobile Robot" ,IEEE Asia Pacific Conference on Circuits and Systems, Chiangmai, Thailand, 1998.
 Wei Zhao, Byung Hwa Kim, Amy C.Larson , Richard M. Voyles, "FPGA Implementation of Close loop Control System for Small Scale Robot" Department of Electrical Engineering University of Minnesota.
 K.K parhi "VLSI Digital signal processing Systems, Design & Implementation".
 Herik Grankvist "Autopilot Design and Path Planning for UAV" FOI Swedish Defense & Security, System &technology Stockholm. W.-K. Chen, Linear Networks and Systems (Book style). Belmont, CA: Wadsworth, 1993, pp. 123-135.
 B.L. Stevens and F.L. Lewis. Aircraft Control and Simulation. John Wiley and Sons New York, 1992.
 Jhon H.Blake Lock, Automatic control of Aircraft and Missiles. John Wiley & Sons publishing company, New York.
 Rober C.Nelson. Flight Stability and Automatic Control. MacGraw Hill Book Company New York.
 Chi-Tsong Chen, "Analog and Digital Control System Design Transfer Function, State-Space, and algebraic Methods." Saunders College Publishing.
 Michael D.Ciletti, "Advanced Digital Design with the Verilog HDL" Prentice Hall of India New Delhi 2005.
 Xilinx, "User Guide for System Generator", version 8.1.