© 2013 by the authors licensee MDPI, Basel, Switzerland. This eliminates the need for external actuator extension of the microgripper as the grasping action was achieved directly with the piezoelectric bimorph, thus minimizing the weight and the complexity of the micro-gripper. Note that the stack actuator shown in figures 2.3 uses the longitudinal piezo. The micro-gripper could perform precise micro-manipulation tasks and could handle objects down to 50 μm in size. The overall result is the bimorph bending with the convex face upper- most. The bending piezoelectric bimorphs were fixed as cantilevers and individually driven using a high voltage amplifier and the bimorph deflection was measured using a non contact proximity sensor attached at the tip of one finger. Both fingers were actuated separately to perform mini object handling. In addition, the implementation of a parallel micro-gripper using bending piezoelectric bimorphs was presented. In this study the dynamic characteristics of bending piezoelectric bimorphs actuators were theoretically and experimentally investigated for micro-gripping applications in terms of deflection along the length, transient response, and frequency response with varying driving voltages and driving signals. Piezoelectric bimorphs have been used as a micro-gripper in many applications, but the system might be complex and the response performance might not have been fully characterized. A prototype is also developed which shows the potential of handling the small light weight objects for robotic assembly. Experimentally, it is verified that the actuator produces steady state behaviour of deflection for handling of the object. 14 Smits J.G., Cooney T.K., The effectiveness of a piezoelectric bimorph actuator to perform. Fuzzy is introduced for fast tuning of PID and provides the steady state characteristics. 6 Numerical solutions for piezoelectric bimorph. Table 3 Expressions for characteristic unimorph/bimorph actuator performance parameters. They have been applied as essential components in thermal management solutions for cooling electronic devices offering better performance with low noise and low power consumption. The design and analysis of the bimorph piezoelectric cantilever using novel fuzzy logic controller (FLC) tuned proportional-integral-derivative (PID) system are carried out where the bimorph piezoelectric actuator is used as an active actuator for providing the dexterous behaviour during robotic assembly. Precision flow pumps have been widely studied over the last three decades. By applying potential to a piezoelectric actuator, it can produce micro level deflection with large force generation, very fast response and long term actuation as compared to other actuators. In this article, analytical solutions of piezoelectric bimorph and unimorph actuator in cantilever configurations are developed using the second-order constitutive equation. Piezoelectric actuator is one of the most versatile types of smart actuators which is extensively used in different industrial applications like robotics, MEMS, micro assembly, biological cell handling, self-assembly and optical component handling in photonics.
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