Fault Tolerance for Active Surface System with Actuator Faults

Table 1

QTT failure mechanism analysis at the ASAS [10–12].

	Types	Reason	Phenomena	Characteristics
Master computer	Accidental termination of program computer failure	Computer failure and program crashes	The whole system stopped working	Sudden failure and obvious fault characteristics
Control network	Ethernet failure, CAN bus fault, junction box failure	Data interface layer and user interface layer failure	Uncontrollable phenomena occurring in multiple sectors	Sudden failure and obvious fault characteristics
Control bus	Interruption, information redundancy	The protocol and the lines are not connected	The issuing command actuators does not accept	Easy to observe the failure features
Displacement actuator	Worm gear pair [12], ball screw pair, power module, stepper motor, limit switch failure	Stuck, line aging, mechanical equipment elastic deformation or gluing, output deviation	The actuator fails to reach the specified pointing coordinate position and sends out abnormal sound	Sudden failure, obvious fault features, features difficult to extract