Fast response active clearance systems with piezoelectric actuator in axial, axial/radial combined, and circumferential directions

At least one non-transitory computer readable storage medium storing instructions that, when executed, cause processor circuitry to at least:

• obtain sensor data;
• monitor engine conditions to determine, based on the sensor data, whether an engine case is expanding or shrinking;
• when determined that the engine case is expanding, supply a first electrical current to displace a multilayer stack of material in a first direction, the multilayer stack of material positioned with respect to the engine case;
• and
• when determined that the case is shrinking, supply a second electrical current is sent to displace the multilayer stack of material in a second direction, the first electrical current different from the second electrical current, the first direction different from the second direction.