Safe control of trailing UAV in close formation flight against actuator fault and wake vortex effect

Abstract In the close formation flight, the wake vortex induced by the leading aircraft will have adverse effects on the safe flight of the trailing unmanned aerial vehicle (UAV). Hence, this paper investigates a difficult problem of safe control for the trailing UAV against actuator faults, input saturation, and wake vortex effect. By using disturbance observers, external wake vortex, disturbances, and internal actuator faults are estimated. Then, with the help of estimated knowledge of disturbance, backstepping control laws are developed for the longitudinal dynamics and the lateral-directional dynamics, respectively. One of the key features of the proposed strategy is that, the inherent problem, i.e., “explosion of complexity” in conventional backstepping control, is solved by the presented dynamic surface control scheme. Another key feature is that external wake vortex, disturbances, and internal actuator faults, input saturation are simultaneously considered. It is shown by Lyapunov stability analysis that the closed-loop system is uniformly ultimately bounded with safety requirements guaranteed even in the presence of wake vortex and actuator faults. The effectiveness of the proposed approach is further validated by simulation results.

[1]  Lei Guo,et al.  Nonlinear-Disturbance-Observer-Based Robust Flight Control for Airbreathing Hypersonic Vehicles , 2013, IEEE Transactions on Aerospace and Electronic Systems.

[2]  Atilla Dogan,et al.  Modeling of Aerodynamic Coupling Between Aircraft in Close Proximity , 2004 .

[3]  Mou Chen,et al.  Adaptive dynamic surface control of NSVs with input saturation using a disturbance observer , 2015 .

[4]  A. Finley Barfield,et al.  An Equivalent Model for UAV Automated Aerial Refueling Research , 2005 .

[5]  Youmin Zhang,et al.  Tracking control of spacecraft formation flying with collision avoidance , 2015 .

[6]  Shuzhi Sam Ge,et al.  Adaptive tracking control of uncertain MIMO nonlinear systems with input constraints , 2011, Autom..

[7]  Raza Samar,et al.  Lateral track control of UAVs using the sliding mode approach: from design to flight testing , 2015 .

[8]  Yao Meng,et al.  Adaptive Backstepping Control for Air-Breathing Hypersonic Vehicles with Input Nonlinearities , 2018 .

[9]  Mangal Kothari,et al.  A Simplified Adaptive Backstepping Control of Aircraft Lateral/Directional Dynamics , 2016 .

[10]  Jinjun Shan,et al.  Close-Formation Flight Control with Motion Synchronization , 2005 .

[11]  Qian Wang,et al.  Non-linear control of an uncertain hypersonic aircraft model using robust sum-of-squares method , 2012 .

[12]  Youmin Zhang,et al.  A survey on technologies for automatic forest fire monitoring, detection, and fighting using unmanned aerial vehicles and remote sensing techniques , 2015 .

[13]  Atilla Dogan,et al.  Fault diagnosis in air data sensors for receiver aircraft in aerial refueling , 2015 .

[14]  Atilla Dogan,et al.  Nonlinear control for reconfiguration of UAV formation , 2003 .

[15]  Marcello R. Napolitano,et al.  Design and Flight Testing Evaluation of Formation Control Laws , 2006, IEEE Transactions on Control Systems Technology.

[16]  Cheng-Chew Lim,et al.  Adaptive neural observer-based backstepping fault tolerant control for near space vehicle under control effector damage , 2014 .

[17]  Mou Chen,et al.  Robust tracking control for uncertain MIMO nonlinear systems with input saturation using RWNNDO , 2014, Neurocomputing.

[18]  Y. Johnson,et al.  Control and tracking of roll dynamics of UAVs in close formation flight , 2015, 2015 IEEE International Conference on Signal Processing, Informatics, Communication and Energy Systems (SPICES).

[19]  Kang Li,et al.  A decentralised control strategy for formation flight of unmanned aerial vehicles , 2012, Proceedings of 2012 UKACC International Conference on Control.

[20]  Douglas I. Famularo,et al.  Fault-Tolerant Adaptive Model Inversion Control for Vision-Based Autonomous Air Refueling , 2017 .

[21]  William Blake,et al.  Control of a Receiver Aircraft Relative to the Tanker in Racetrack Maneuver , 2006 .

[22]  Yuhui Shi,et al.  ?Hybrid Particle Swarm Optimization and Genetic Algorithm for Multi-UAV Formation Reconfiguration , 2013, IEEE Computational Intelligence Magazine.

[23]  Chen Wei,et al.  Sliding mode disturbance observer-based backstepping control for a transport aircraft , 2013, Science China Information Sciences.

[24]  Tsu-Chin Tsao,et al.  Saturation-Induced Instability and Its Avoidance in Adaptive Control of Hard Disk Drives , 2010, IEEE Transactions on Control Systems Technology.

[25]  Naira Hovakimyan,et al.  L1 Adaptive Neural Network Controller for Autonomous Aerial Refueling with Guaranteed Transient Performance , 2006 .

[26]  Youmin Zhang,et al.  Retrofit fault‐tolerant tracking control design of an unmanned quadrotor helicopter considering actuator dynamics , 2019 .

[27]  Marios M. Polycarpou,et al.  Adaptive fault-tolerant control of nonlinear uncertain systems: an information-based diagnostic approach , 2004, IEEE Transactions on Automatic Control.

[28]  H. Schlichting.  Boundary Layer Theory , 1955 .

[29]  Gregory S. Hornby,et al.  An Analysis of the Potential Savings from Using Formation Flight in the NAS , 2012 .

[30]  Danwei Wang,et al.  Fault-tolerant control using command-filtered adaptive back-stepping technique: Application to hypersonic longitudinal flight dynamics , 2016 .

[31]  William B. Blake,et al.  Surfing aircraft vortices for energy , 2015 .

[32]  Youmin Zhang,et al.  Bibliographical review on reconfigurable fault-tolerant control systems , 2003, Annu. Rev. Control..

[33]  Youmin Zhang,et al.  Real-Time Fault-Tolerant Cooperative Control of Multiple UAVs-UGVs in the Presence of Actuator Faults , 2016, 2016 International Conference on Unmanned Aircraft Systems (ICUAS).

[34]  Hugh H. T. Liu,et al.  Robust Design of Close Formation Flight Control via Uncertainty and Disturbance Estimator , 2016 .

[35]  Xiang Yu,et al.  Fault-Tolerant Flight Control Design with Explicit Consideration of Reconfiguration Transients , 2016 .

[36]  Honglun Wang,et al.  Back-stepping based anti-disturbance flight controller with preview methodology for autonomous aerial refueling , 2017 .

[37]  Lei Guo,et al.  Flight Control Design for Small-Scale Helicopter Using Disturbance-Observer-Based Backstepping , 2015 .

[38]  An-Min Zou,et al.  Robust Attitude Coordination Control for Spacecraft Formation Flying Under Actuator Failures , 2012 .

[39]  Jing Zhou,et al.  Robust Adaptive Control of Uncertain Nonlinear Systems in the Presence of Input Saturation and External Disturbance , 2011, IEEE Transactions on Automatic Control.

[40]  Bin Xu,et al.  Robust adaptive neural control of flexible hypersonic flight vehicle with dead-zone input nonlinearity , 2015 .

[41]  Miroslav Krstic,et al.  Robust dynamic positioning of ships with disturbances under input saturation , 2016, Autom..

[42]  Youmin Zhang,et al.  Fault‐tolerant formation control of multiple UAVs in the presence of actuator faults , 2016 .

[43]  Peng Shi,et al.  Attitude Stabilization of Spacecrafts Under Actuator Saturation and Partial Loss of Control Effectiveness , 2013, IEEE Transactions on Control Systems Technology.

[44]  Pei Li,et al.  A binocular vision-based UAVs autonomous aerial refueling platform , 2016, Science China Information Sciences.

[45]  Khalid Munawar,et al.  Lateral guidance and control of UAVs using second-order sliding modes , 2016 .

[46]  Matthew Rhudy,et al.  Control performance analysis for autonomous close formation flight experiments , 2014, 2014 International Conference on Unmanned Aircraft Systems (ICUAS).

[47]  Shen Yin,et al.  Velocity-Free Fault-Tolerant and Uncertainty Attenuation Control for a Class of Nonlinear Systems , 2016, IEEE Transactions on Industrial Electronics.

[48]  Raza Samar,et al.  Guidance of Air Vehicles: A Sliding Mode Approach , 2015, IEEE Transactions on Control Systems Technology.