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首页> 外文期刊>Energy Harvesting and Systems >Optimization of a Piezoelectric Bending Actuator for a Tactile Virtual Reality Display : Energy Harvesting and Systems
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Optimization of a Piezoelectric Bending Actuator for a Tactile Virtual Reality Display : Energy Harvesting and Systems

机译：触觉虚拟现实显示器的压电弯曲致动器的优化：能量收集和系统

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The excitation of mechanoreceptors in the finger with different frequencies and intensities generates a tactile impression. For the experience of a complete surface many distributed sources are needed in the tactile display. For these local stimulations of the finger several piezoelectric bending actuators will be arranged in an array perpendicular to the skin. The challenge in the system design is to transfer high dynamic shear forces to the skin at required frequencies together with a compact display design. In order to estimate the dynamic behavior of the bending actuators a transfer matrix method model based on the Timoshenko beam theory is derived. Beside the outer geometric values, the layered structure of the actuator is included in the model. In addition the influence of the load on the actuator’s tip in lateral and in normal direction as well as on the rotational degree of freedom is taken into account. Using the analytical approach, a parametric study is carried out to find an optimized actuator design for the display. For the validation, the modeled beam is compared with experimental data.
机译：手指中机械感受器以不同的频率和强度激发会产生触觉。为了获得完整的表面体验，在触觉显示器中需要许多分布式光源。对于手指的这些局部刺激，将几个压电弯曲致动器布置成垂直于皮肤的阵列。系统设计面临的挑战是如何以紧凑的显示设计以所需的频率将高动态剪切力传递至皮肤。为了估计弯曲执行器的动态性能，导出了基于Timoshenko梁理论的传递矩阵方法模型。除了外部几何值外，执行器的分层结构也包括在模型中。此外，还应考虑到负载对执行器顶端的横向和法向以及旋转自由度的影响。使用分析方法，进行了参数研究，以找到用于显示器的最佳执行器设计。为了进行验证，将模拟光束与实验数据进行比较。

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