Optimized Active Control of a Smart Cantilever Beam Using Genetic Algorithm

摘要

Vibration is one of the most dangerous phenomena that happens to a structure. It leads topremature fatigue and eventually failure, with potentially fatal consequences. A smart structure isan excellent solution to this problem; it adds an actuator, a sensor, and an appropriate control lawto the system to reduce/eliminate the vibration. This study developed a complete analytical modelfor a cantilever beam with a collocated PZT sensor/actuator pair. First, we used a coupling of acollocated PZT sensor and an actuator to measure and control vibration levels based on a PID controllaw considering the physical constraints associated with PZT operation as the voltage level of theactuator. Next, the damping coefficient of the structure was determined by using genetic algorithmsbest fit to satisfy specific vibration conditions. Finally, we conducted a complete optimization forsensor/actuator position and PID parameters, using genetic algorithms. Thus, this paper gives athorough understanding of the potential vibration control of the cantilever beam.