共查询到20条相似文献,搜索用时 828 毫秒
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在分析传感器响应特性的基础上,得出了阶跃输入时,压电谐振式力传感器在不同状态下的输出响应,分析了响应时间与敏感头的固有频率ωn、阻尼比ξ、输出误差带2Δy及灵敏度之间的关系。研究表明:给定传感器的输出误差带后,在轻度欠阻尼状态下传感器响应时间最短,增大敏感头固有谐振频率能提高传感器的响应速度,但会降低灵敏度,调整敏感头的结构,可使传感器的响应满足要求。 相似文献
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提出了一种谐振式硅微结构传感器综合测试分析仪器,用于微机械谐振式传感器各关键环节的测试、分析与评估.主要解决测试对象特性模型、微弱信号处理、测试数据分析评估等问题,并将有关理论和技术集成为一台模块化的、具一定开放性的测试仪器.该测试仪器对于深入掌握谐振式硅微结构传感器谐振子和闭环系统的特性和优化方法,实现高性能微传感器具有重要意义. 相似文献
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基于惯性式加速度传感器原理,采用质量块与弹性元件串并联的结构,提出了一种应变式三维加速度传感器.建立了应变式三维加速度传感器的动力学模型,运用正交试验法,优选了参数选择方案.分析了传感器结构参数对传感器固有频率和灵敏度及其综合性能指标的影响,获得了传感器三维动态响应曲线,并利用有限元方法对传感器的动态响应性能进行了仿真分析.仿真结果表明:新型应变式三维加速度传感器具有良好的低频特性,能有效提取轴承低频振动信号,且结构简单、成本低廉,易于加工装配,可用于轴承运行状态的监测与故障诊断领域. 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当,影响了仪表的正常使用,制造厂和用户应关注这类问题。 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率. 相似文献
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Modern methods of implementation of the rule of positive gradient of mechanical properties are considered; this rule was formulated by I.V. Kragelskii and its application serves to minimize the friction and wear of solids. The given methods include the application of coatings with the method of finishing antifricton abrasion-free treatment; application of new metal-cladding lubricating materials; and creation of a nanostructural state of the surface iron nitride layer by nitriding steel with a positive gradient of hardness normal to the surface. 相似文献
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针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。 相似文献
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一种涡旋压缩机径向随变机构的设计 总被引:1,自引:0,他引:1
详细介绍了运用随变原理设计的一种新型径向密封机构的结构特点,工作原理及主要参数的确定方法,该机构可补偿由于涡旋体加工精度不高而造成的功率损失,适用于涡旋压缩机的批量生产。 相似文献