An impact angle constrained fuzzy adaptive fault tole-rant integrated guidance and control method for Ski-to-Turn(STT)missiles subject to unsteady aerodynamics and multiple disturbances is proposed.Unsteady aerodynamics appears when flight vehicles are in a transonic state or confronted with unstable airflow.Meanwhile,actuator failures and multisource model uncertainties are introduced.However,the boundaries of these multisource uncertainties are assumed unknown.The tar-get is assumed to execute high maneuver movement which is unknown to the missile.Furthermore,impact angle constraint puts forward higher requirements for the interception accuracy of the integrated guidance and control(IGC)method.The impact angle constraint and the precise interception are established as the object of the IGC method.Then,the boundaries of the lumped disturbances are estimated,and several fuzzy logic sys-tems are introduced to compensate the unknown nonlinearities and uncertainties.Next,a series of adaptive laws are developed so that the undesirable effects arising from unsteady aerody-namics,actuator failures and unknown uncertainties could be suppressed.Consequently,an impact angle constrained fuzzy adaptive fault tolerant IGC method with three loops is con-structed and a perfect hit-to-kill interception with specified impact angle can be implemented.Eventually,the numerical simulations are conducted to verify the effectiveness and superi-ority of the proposed method.

Research Center for Unmanned System Strategy Development,Northwestern Polytechnical University,Xi'an 710072,China;Unmanned System Research Institute,Northwestern Polytechnical University,Xi'an 710072,China

[1]GUO Hang;WANG Zheng;FU Bin;CHEN Kang;FU Wenxing;YAN Jie-.Impact angle constrained fuzzy adaptive fault tolerant IGC method for Ski-to-Turn missiles with unsteady aerodynamics and multiple disturbances)[J].系统工程与电子技术（英文版）,2022(05):1210-1226

tole,rant,superi,ority

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