Bimorph piezo actuator solution12/2/2023 ![]() studied the static displacement of a piezo actuator made of PZT-5H under high input voltage, and the result is helpful for designers to control the shape and vibration of bending piezo actuators. ![]() proposed a piezoelectric multi-layer actuator instead of electrostatic actuators to drive a micro-lens for imaging applications. A stick-slip piezoelectric actuator was optimized by using a flexible foot, allowing the actuator to work stably. Additionally, an electromagnetic optical switch and an electro-thermal actuator for the switch were discussed and proved to have practical value.Ĭompared with other types of micro actuators, piezoelectric actuators could be widely used because of their benefits in miniaturization and rapid response improvement, in fields such as medicine delivery, micro-robotics, and ultra-precision machining. Leung and his team described a bimorph actuator for fiber alignment whose linear actuation is 60 μm and applied voltage is 100 V. coupled a mass-spring system with the actuator, while the method caused a size increase. As the temperature effect cannot be ignored, Dai et al. A direct-coupled optical switch based on an electrothermal-driven cantilever was designed to have output displacement of 130 μm with a driven voltage of 44 V. Many of the existing micro actuators have been driven mainly by electric heating elements, electrostatic plates, electromagnetic elements, piezoelectric components and shape memory. It is necessary to design and study specialized micro actuators and provide precise solutions for aligning optical fibers. However, with traditional actuators, it is hard to achieve the high accuracy and small volume required for the optical fiber alignment system. Micro actuators are important to these switches and used for pushing and pulling fibers. ![]() One kind of light microswitch has been reported based on controlling interruption of light roads. Optical fibers are widely used for transmitting signals. Additionally, the fuzzy PID control has a lower response time (15 ms) and an overshoot (5%). The results show that the output displacement of this actuator is larger than that of a rectangular one. Finally, a composite control model combining the two control methods with fewer tracking errors was designed. Then, two control methods, namely feedforward control considering hysteresis effects and fuzzy proportional-integral-derivative (PID) control employing feedback, were proposed. Since the piezoelectric bimorph actuator had a hysteresis effect, we applied particle swarm optimization to establish a Prandtl–Ishlinskii (PI) model for actuator and parameter identification. Based on a mathematical model and finite element model established in this paper, we analyzed the output displacement and output force of the proposed trapezoidal piezoelectric actuator under the influence of structural parameters. A trapezoidal piezoelectric bimorph actuator was proposed for pushing and pulling an optical fiber. To align a pair of optical fibers, it is required that the micro actuators used be small and have the characteristics of high accuracy and fast response time.
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