1. College of Information & Technology L A M S S SMART ACTUATORS CHARACTERIZATION Victor Giurgiutiu, Radu Pomîrleanu Laboratory of Active Materials and Smart Structures Mechanical Engineering Department, University of South Carolina

2. College of Information & Technology L A M S S Smart materials Smart material Applied field  Upon the application of an external field, the material expands or contracts. Smart (active, intelligent, adaptive) materials: - piezoelectric materials  electric field - magnetostrictive materials  magnetic field - shape memory alloys  temperature Applications:- space technology - rotorcraft and aircraft industry - sonar technology - vibration and noise reduction

3. College of Information & Technology L A M S S Characterization of the PiezoSystems Jena PAHL120/20 piezoelectric actuator Manufacturer: PiezoSystems Jena Model # : PAHL120/20 Maximum voltage (V): 150 Max. displ. (  m): 120 Blocked force (N): 3500 Capacitance (  F): 42 Displacement (  m) Force (N) External stiffness Voltage kiki keke Force, Displacement Coupled electro-mechanical behavior of PAHL 120/20 Actuator

4. College of Information & Technology L A M S S Impedance analyzer ~0V PhAngle method 23.0V PhAngle method 34.5V PhAngle method 46.4V PhAngle method 58.6V Frequency (Hz) Impedance (Ohms) Impedance measurements on the ETREMA AA140J130 Magnetostrictive actuator Manufacturer: Etrema Inc. Model # : AA –140J013 Maximum current (A RMS):  3 Max. displ. (  m):  70 Max. dynamic force (N):  890 Blocked force (N): 1740 DC Resistance (  ): 2.3 Inductance (mH): 3.5 Electric impedance change with current and frequency Etrema actuator RERE LELE R U RE URUR U LE UTUT Measured : U T, U R, delay (phase) between U T and U R