Rollback happens to most inertial piezoelectric actuators due to the forward and backward bending of bimorphs in a driving cycle. An inertial piezoelectric rotary actuator with two asymmetrically clamped bimorphs working in phase is proposed in this study to eliminate rollback. The electrical in-phase connection of the two bimorphs gives the actuator two steps in a driving cycle but a reduced load capacity. Comsol software is used for modal analysis and a series of experiments were carried out to study the output performance of the actuator. Experiment results indicated that the actuator can work stably at two steps per cycle without rollback in all working conditions. The minimum angular displacement was 7.4 μ rad under the signal of 15 V, 1 Hz without load. With the application of a bias unit, the actuator can drive a 460 g load which is comparable with other inertial piezoelectric actuators. In a word, the in-phase connection of two asymmetrically clamped bimorphs can e...

中文翻译：

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惯性压电旋转执行器，其特征在于无回滚运动

由于双压电晶片在行驶周期中会向前和向后弯曲，因此大多数惯性压电执行器都会发生回滚。为了消除回滚，本研究提出了一种具有两个不对称夹持双压电晶片同相工作的惯性压电旋转致动器。两个双压电晶片的同相电连接使执行器在行驶周期中分两个步骤，但负载能力降低。使用Comsol软件进行模态分析，并进行了一系列实验以研究执行器的输出性能。实验结果表明，该致动器可以在每个周期的两个步骤中稳定工作，而在所有工作条件下均不会回退。在没有负载的15 V，1 Hz信号下，最小角位移为7.4μrad。随着偏压单元的应用，该执行器可以驱动460 g的负载，这可与其他惯性压电执行器相媲美。简而言之，两个不对称钳位的双压电晶片的同相连接可以使...