FAN BLADE VIBRATION MONITORING AND CONTROL SYSTEM AND METHOD

摘要

A gas turbine engine includes a fan positioned in a containment case. The fan includes a fan hub with a number of fan blades extending from the fan hub. A blade motion control system is coupled to the gas turbine engine to detect and control fan blade motion caused by harmonic modes. One or more magnetic materials are coupled to one or more of the fan blades of the gas turbine engine. One or more blade motion sensors are coupled to the containment case and are configured to detect the motion of the magnetic materials coupled to the fan blades. A control unit can adjust one or more operational parameters of the gas turbine engine to disrupt the fan blade motion caused by the detected harmonic modes. A corresponding method for controlling motion caused by harmonic modes in a gas turbine engine fan blade is also provided.