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《浙江大学学报(A卷英文版)》2016,(1)
目的:介电高弹体是典型电敏性材料,在外加电场的作用下会产生大的变形,这一特点使其成为人工肌肉致动的理想材料,近年来引起研究者的广泛关注。本文着重介绍介电高弹体的基本力学理论和方法,旨在为相关材料、结构和器件的设计提供参考,也有助于不同专业背景的研究者了解并开展介电高弹体的相关研究。概要:本文介绍了近年来关于介电高弹体力电耦合问题的一些理论和数值研究,重点包括力电耦合的控制方程、材料本构关系、粘弹性响应、力电失稳以及致动器设计等方面。文中讨论了基于非平衡热动力学的介电高弹体力学模型处理复杂构型或与时间相关变形时常被采用的数值方法,优化介电高弹体致动极限的力学设计,以及介电高弹体力电响应在典型致动器中的应用。 相似文献
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智能材料与智能结构及其应用 总被引：1，自引：0，他引：1
介绍了智能结构概念和智能材料的内容，阐述了智能结构的组成：传感器、致动器和控制器，说明了智能材料、智能结构的应用，并总结了国外智能结构研究应用的特点。 相似文献
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论述了超磁致伸缩作动器的基本原理,根据三种偏置磁场优缺点,选用增加单独线圈产生偏置磁场。在磁路分析的基础上,采用有限元仿真的方法,分析了不同参数和结构对各个组成部分的磁场影响。 相似文献
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《校园英语(教研版)》2016,(30):229-230
英汉语言中都有一种十分重要的,用以表达两个事物之间致动关系的语言结构,即致动结构。它使得我们表达客观世界的致动事件的方式非常丰富,而且通过对致动结构的分析可以提高英汉语言学习者对另外一种语言灵活性的了解。当然,英汉语言在致动结构上有类似的或者相同的表达方式和句型,但也各有其语言独特性。 相似文献
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微机电系统是一种集微电子电路和微机械致动器的微小器件,微传感器的性能检测可通过对系统输入量和输出量的检测,选择合适的测试仪器和测试方法来实现.根据角频率的推导,采用频率响应方法,其结果比通过传递函数数值分析得到的谐振角频率精确得多. 相似文献
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微机电系统是一种集微电子电路和微机械致动器的微小器件，微传感器的性能检测可通过对系统输入量和输出量的检测，选择合适的测试仪器和测试方法来实现，根据角频率的推导，采用频率响应方法，其结果比通过传递函数数值分析得到的谐振角频率精确得多。 相似文献
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《成都航空职业技术学院学报》2020,(1)
本文介绍了米-XX系列直升机旋翼桨毂弓形夹上装用的下垂离心限动器结构构成、工作原理,限动器在低转速情况下可能出现的不能收放自如的故障现象和成因。通过对此故障原因进行分析,发现该故障与限动器的限动块轴等零件的工作状态、螺纹预紧力矩,限动器工作环境、维护情况等有密切关系,并针对该故障产生的机理提出了维护和修理建议。 相似文献
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通过对在三种运行模式（即微逆变器系统、电源优化器系统和组串式逆变器系统）下的光伏系统发电量进行比较与分析,研究了户外不同运行模式下晶体硅光伏组件的初期衰减情况,测量结果表明,三种系统的发电量组串逆变器系统的日发电量最高,微逆变器系统和电源优化器系统基本一致,而晶体硅组件在户外运行了3年之后功率平均衰减率为2.20%,同时,不同的运行模式下组件初期衰减会出现一定的差异,其中微逆变器安装方式的组件衰减率最低,通过EL测试尝试找出导致其衰减差异的原因。 相似文献
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门运强 《成都航空职业技术学院学报》2023,(3):33-36+49
通过对空客飞机水平安定面作动器（THSA）机械和液压机构的详细解析,逐步分析了THSA组件的原理、组成及其各部件功用。并结合某公司最近10年运行中的故障数据,进行定量和定性的数据分析,从而获得了运行延误故障概率值,并对故障从运行可靠性维度进行了分析评估,以获取其重要性级别。最终结合持续性适航维修项目,制定了相关维修检查工作的优先级别。 相似文献
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渗油直接影响阀门电动装置的质量。本研究了阀门电动装置的密封机理,分析了产生渗漏的原因,从设计,工艺,生产等方面提出了解决措施。 相似文献
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提出了一种新型二维超精密微步进工作台的结构形式,并针对该结构设计了相应的微步进执行器.以新型功能材料Piezo作为驱动元件,分析了微步进执行器的机电耦合模型,在此基础上对其时间响应进行了分析,总结了时间响应的影响因素,同时提出了相应的解决方法. 相似文献
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文强 《柳州职业技术学院学报》2021,(1)
执行元件工作是自动变速器形成动力挡位的基础,而自动变速器换挡是通过执行元件的切换来实现的,因此,执行元件的工作状态直接影响着自动变速器的动力传递。U340E自动变速器有8个执行元件,执行元件数量增多,变速器出故障的概率增加。通过对执行元件的故障分析,可以缩小自动变速器的故障范围,以便快速诊断出自动变速器的某类故障,缩减故障诊断时间,降低维修成本。 相似文献
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从驱动组元的工作机理角度,系统分析了目前可用于智能材料系统中的驱动材料,提出了场诱发相变驱动材料的设计思想,对场诱发相变的铁电体和反铁电体材料进行优化设计和制造,结果表明:研制场诱发相变的理想驱动材料是可能的。 相似文献
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SA Peng-fei ZHAO Min FANG Shu-hua 《重庆大学学报(英文版)》2006,5(1):19-23
1 Introduction [1-3]The permanent magnetic actuator (PMA) technology first showed up in 1990s. It adopts a new working theory and a novel structure. With the combination of electrical magnetism and permanent magnetism, it can realize all functions of a br… 相似文献
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Ion-exchange polymer-metal composite （IPMC） is a new electroactive material. It has large deformation and high force weight ratio in the presence of low voltage （〈1.5 V）. In this study a soft actuator known as artificial muscle based on IPMC was prepared. The IPMC actuator is composed of a perfluorinated ion-exchange membrane and platinum plated on both sides of the membrane by chemical means. Experiences and some key points are introduced in preparation of the IPMC. Electromechanical behaviors of the actuator are investigated, Factors related to the actuator performance are discussed. 相似文献
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We investigated the behaviors of an active control system of two-stage vibration isolation with the actuator installed in parallel with either the upper passive mount or the lower passive isolation mount. We revealed the relationships between the active control force of the actuator and the parameters of the passive isolators by studying the dynamics of two-stage active vibration isolation for the actuator at the foregoing two positions in turn. With the actuator installed beside the upper mount, a small active force can achieve a very good isolating effect when the frequency of the stimulating force is much larger than the natural frequency of the upper mount; a larger active force is required in the low-frequency domain; and the active force equals the stimulating force when the upper mount works within the resonance region, suggesting an approach to reducing wobble and ensuring desirable installation accuracy by increasing the upper-mount stiffness. In either the low or the high frequency region far away from the resonance region, the active force is smaller when the actuator is beside the lower mount than beside the upper mount. 相似文献
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Yun-guang Luan Hua-ming Wang Dong-biao Zhao Yang Wang Feng-hong Chen 《浙江大学学报(A卷英文版)》2017,18(10):831-840
A combustion-powered actuator has been proposed in our previous work (Wang et al., 2015), and it has shown great power hopping ability. To explore the hopping process and output performance of the actuator, the model of an actuator driving the hopping process is investigated through theoretical analysis and experimental validation. Firstly, the structure of the actuator and hopping process are described briefly, and the dynamic models of the process are constructed. Secondly, the thermodynamic model of the actuator is established by the Wiebe heat release function and the input energy density is computed by Chemkin for when propane and nitrous oxide with different equivalence ratios are injected into the chamber. Thus, the thermodynamic model is obtained by integrating dynamic and thermodynamic equations. After that, a few output performance parameters are identified to assess system performance. Lastly, the experimental rig of the combustion actuator is set up to test the displacement and pressure of the actuator driven hopping process. By solving the thermodynamic equations, the post-combustion pressure, the displacement and the velocity varying with time are computed, and are compared with the test results, indicating that the computational results match the experimental test well. At the end of the stroke, the velocities of the experiment and simulation are 6.5 m/s and 6.99 m/s, respectively. The hopping results are compared with the simulation when different pressures under equivalence ratio of 1 are injected, and the maximum and minimum deviations are 14.45% and 1.83%, respectively. 相似文献
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A novel ε-type solenoid actuator is proposed to improve the dynamic response of electro-pneumatic ejector valves by reducing moving mass weight. A finite element analysis （FEA） model has been developed to describe the static and dynamic operations of the valves. Compared with a conventional E-type actuator, the proposed ε-type actuator reduced the moving mass weight by almost 65% without significant loss of solenoid force, and reduced the response time （RT） typically by 20%. Prototype valves were designed and fabricated based on the proposed ε-type actuator model. An experimental setup was also established to investigate the dynamic characteristics of valves. The experimental results of the dynamics of valves agreed well with simulations, indicating the validity of the FEA model. 相似文献
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