【作者】 赵伟杰；

【导师】 张然； 金仁成；

【作者基本信息】 大连理工大学 ， 机械工程（专业学位）， 2023， 硕士

【摘要】 随着科技的发展,众多新兴高科技领域蓬勃发展,对于驱动技术的需求也越来越高,传统的驱动技术已经难以满足日益复杂的要求。针对于复杂的工作环境以及严苛的驱动需求,尺蠖式压电直线驱动器具有大行程的输出,还可以稳定的输出推力和大功率密度,在众多高科技领域有着广泛的应用前景。尺蠖式压电直线驱动器一般由两组箝位机构和一组驱动机构构成,通过模拟自然界中尺蠖“箝位—驱动—箝位”的运动机理,两组箝位机构与驱动机构相互配合输出步进运动。本文基于被动箝位的原理,以大输出力为设计导向,采用自锁结构设计了一种可以实现断电自锁的尺蠖式压电直线驱动器,并以输出力为核验标准通过有限元仿真优化驱动器结构,最后制作了驱动器样机并进行了实验研究,本文的主要研究内容如下:总结了压电驱动器的分类及其各自特点,并着重针对尺蠖式压电直线驱动器的研究现状进行了阐述和分析,随后就箝位机构的分类进行阐述,提出了本文的研究目标及任务。对尺蠖式压电直线驱动器的基本结构和工作原理进行了分析,并对所设计的尺蠖式压电直线驱动器的运动原理进行了阐述。对驱动器驱动机构的压电陶瓷叠堆进行分析和测试。为了实现较大的输出力,基于被动箝位方式,采用自锁结构设计了驱动器的箝位机构,并对其进行理论分析。以输出力为驱动器的核验标准,通过ANSYS有限元软件对箝位机构中的自锁结构进行有限元仿真分析,通过分析仿真结果逐步完成对自锁结构的结构优化,最终完成驱动器的结构设计。最终加工制作了驱动器样机,并搭建了样机测试平台,对驱动器进行了性能测试和分析。通过实验结果可知,驱动器的最大输出速度为0.744mm/s,带负载情况下可以有效地实现步进运动,驱动器的最大输出力可以达到100N,具有较好的高负载驱动能力。更多还原

【Abstract】 With the development of technology,many emerging high-tech fields are thriving,and the demand for driving technology is also increasing.Traditional driving technology is no longer able to meet the increasingly complex requirements.For complex working environments and demanding driving requirements,the inchworm piezoelectric linear actuator has a large stroke output,stable output thrust,and high power density,and has a wide application prospect in many high-tech fields.The inchworm piezoelectric linear actuator is generally composed of two sets of clamping mechanisms and one set of driving mechanisms.By simulating the motion mechanism of inchworm "clamping-driving-clamping" in nature,the two sets of clamping mechanisms and driving mechanisms cooperate to output step motion.This research is based on the principle of passive clamping,with a hign output force as design direction,and adopts a self-locking structure to design an inchworm piezoelectric linear driver that can achieve power outage self-locking.The output force is used as the verification standard to optimize the driver structure through finite element simulation.Finally,a prototype of the driver is made and experimental research is conducted.The main research content of this research is as follows:This research summarizes the classification and characteristics of piezoelectric actuators and focuses on the current research status of inchworm piezoelectric linear actuators.Subsequently,the classification of clamping mechanisms is elaborated,and the research objectives and tasks of this research are proposed.The basic structure and working principle of the inchworm piezoelectric linear actuator were analyzed,and the motion principle of the designed inchworm piezoelectric linear actuator was explained.Detailed analysis and testing were conducted on the piezoelectric ceramic stack of the driver-driving mechanism.To achieve the target output force,a selflocking structure was used to design the clamping mechanism of the actuator based on passive the lamping method,and theoretical analysis was conducted on it.Using the output force as the verification standard for the actuator,finite element simulation analysis was conducted on the self-locking structure in the clamping mechanism using ANSYS finite element software.Through the analysis of simulation results,the structural optimization of the self-locking structure was gradually completed,and the final structural design of the actuator was completed.The final prototype of the actuator was processed and manufactured,and a prototype testing platform was built to conduct performance testing and analysis on the actuator.According to the experimental results,the maximum output speed of the actuator is0.744mm/s,which can effectively achieve stepper motion under load conditions.The maximum output force of the actuator can reach 100 N,indicating good high-load driving ability.更多还原