Jam detection and jam tolerant motion control

A turbofan engine assembly comprising:

• a turbofan engine;
• a nacelle surrounding the turbofan engine and defining an annular bypass duct through the turbofan engine to define a generally forward-to-aft bypass airflow path;
• and
• a thrust reverser comprising:
• a flexible element, moveable to and from a reversing position where at least a portion of bypass airflow is reversed;
• a power inverter;
• a first electromechanical device configured to urge movement of a first portion of the flexible element based on power received from the power inverter;
• a second electromechanical device configured to urge movement of a second portion of the flexible element based on power received from the power inverter;
• a power bus configured to conduct power from the power inverter to the first electromechanical device and to the second electromechanical device concurrently;
• a feedback sensor configured to provide a feedback signal indicative of alignment between the first portion and the second portion;
• and
• a controller configured to control operation of at least one of the first electromechanical device and the second electromechanical device based on the feedback signal, wherein the controller is configured to modify a first electrical impedance of the first electromechanical device to be different from a second electrical impedance of the second electromechanical device.