Thermopiezoelectric control design and actuator placement

The quasistatic thermopiezoelectricity equations are used to include thermal effects in piezoelectric sensing and control systems. The ® nite element equations are developed for thermopiezoelectric sensor and actuator design. Static and dynamic case studies are carried out to observe the temperature effects in the piezoelectric control systems. Thermal effects are also included in the piezoelectric actuator location problem for the cantilever beamlike problems. It is found that the displacements caused by the temperature effects are important in the precision sensing and control of distributed systems by piezoelectric materials. It is also concluded that for the cantilever beamlike problems, in the presence of a uniformly distributed thermal ® eld, the thermopiezoelectric actuators are to be located closer to the ® xed end for a more effective control of structural oscillations.

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