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A nominal state feedback virtual control law is designed first to stabilize the Lipschitz nonlinear system and to attain the desired nominal performance. To cater for the effect of faults and failures, the control allocation (CA) scheme reorganizes the virtual input signals among the healthy redundant actuators based on actuator's effectiveness level. Then, a nonlinear adaptive integral sliding mode controller (ISMC) is incorporated with the CA scheme to compensate for unknown disturbance and uncertainties effect that arises in the system by virtue of actuator faults\u002Ffailures and error in fault estimation . An effective synthesis procedure is adopted to ensure the closed‐loop stability condition using linear matrix inequality (LMI) optimization. Finally, the FTC scheme is tested to achieve maneuvering control of coaxial octorotor unmanned aerial vehicle (UAV) system. Simulations are performed on the nonlinear system at different actuator faults\u002Ffailures combinations. Moreover, the effect of wind‐gust, parameter variations, estimated state feedback and sensor noise are considered in nonlinear simulations. Finally, the results obtained during faults\u002Ffailures are compared with the nominal condition and fixed ISMC based CA scheme.",[11,12,13],"Ijaz, Salman","Chen, Fuyang","Hamayun, Mirza Tariq",[15,16,17],"0000-0003-1483-4754","0000-0003-2650-420X","0000-0003-0535-5356",2021,"https:\u002F\u002Fdoi.org\u002F10.1002\u002Frnc.5394","W3122536874","International Journal of Robust and Nonlinear Control",null,[24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40],"Control theory (sociology)","Actuator","Nonlinear system","Integral sliding mode","Controller (irrigation)","Lipschitz continuity","Sliding mode control","Computer science","Fault (geology)","Noise (video)","Linear matrix inequality","Fault tolerance","Control engineering","Engineering","Control (management)","Mathematics","Mathematical 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