共查询到20条相似文献,搜索用时 93 毫秒
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《振动、测试与诊断》2015,(6)
面向惯性传感与测量系统在超高过载、超高转速等极端应用环境下,介绍了几种典型的瞬态高量程与大动态范围条件下的惯性传感与测量系统技术。重点分析和讨论了极端环境下的超量程与大动态测试所需的特种传感方法与微纳集成制造技术,结合特殊的封装防护与系统集成方法,实现外部恶劣环境影响因子的衰减,以及新型的高过载、高旋运动载体惯性参数的传感与测量。 相似文献
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唐瑞 《仪器仪表与分析监测》2013,(4):14-16
将GPS技术引入到火箭橇试验速度测试中,为橇体的运动提供更精确的时空—位置数据,同时可以与现有的测速系统做对比测试,为测速系统的精度分析提供依据. 相似文献
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被誉为"亚洲第一轨"的火箭橇试验滑轨,可广泛应用于飞机弹射装置和导弹等试验对象全尺寸地面动态试验。提出了GPS技术在高速火箭橇滑轨试验中的应用,可在火箭橇滑跑过程中提供时统信号、火箭橇滑跑速度及飞机弹射装置轨迹等参数,是对目前测试手段的补充和提高。 相似文献
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智能断路器的电量测量与过载保护算法 总被引:4,自引:1,他引:4
智能断路器是一种以微处理器为核心的电路控制器.由于其实时性要求较高,因此需要有效的快速测量和过载保护计算方法支持.首先介绍了智能断路器的过载保护特性,然后讨论了交流电快速测量方法与过载保护算法,并给出了其实现方案. 相似文献
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讨论了颚式破碎机的常用过载保护方法,重点介绍了一种新型的液压过载保护装置,该装置结构简单、工作可靠、操作维护方便并便于实现自动化控制. 相似文献
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颚式破碎机的液压过载保护研究 总被引:2,自引:0,他引:2
该文讨论了颚式破碎机的常用过载保护方法,重点介绍了一种新型的液压过载保护装置,该装置结构简单、工作可靠、操作维护方便并便于实现自动化控制. 相似文献
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The Sliding Contact Condition in Stability Analysis of Stage Motion for a Rocket Sled Track Facility
S. I. Gerasimov V. G. Kamchatnyi I. A. Odzerikho 《Journal of Machinery Manufacture and Reliability》2018,47(3):221-226
Variations in the mechanical characteristics of a material, intense plastic deformations, and the ablation of the material of working surfaces during high-speed sliding of loads along the rails of a rocket sled track facility are studied. 相似文献
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为了降低试验成本,提高试验效率,开发了一种台车试验用的尺寸可调工装。将约束系统与车身连接点柔性化,通过调节涉及约束系统模块连接点的安装位置,快速实现与多项目平台车型布置坐标转换。在整车开发初期可提供约束系统匹配的台车试验条件,实现多个车型平台共用一个工装的目的;以某一车型为例,参考其布置参数并调整尺寸可调工装,进行台车100%正面碰撞模拟试验,结合客观评价(ORM)方法,对比安装不同工装台车试验中假人伤害值曲线。结果表明:安装尺寸可调工装的台车试验所获得的假人伤害值曲线与传统的车身固定点加固方法试验有较高的一致性,验证了尺寸可调工装的有效性与可靠性。 相似文献
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为了节约开发成本,减少实车碰撞试验次数,基于中国保险汽车安全指数(China Insurance Automotive Safety Index,C-IASI)中侧面碰撞试验规程,使用带有副台车的加速台车设备,通过主台车复现整车试验假人胸部中间肋骨位置对应车门内钣金Y方向加速度,副台车通过蜂窝铝调节复现车辆非被撞侧B柱Y方向加速度,以此实现台车侧碰模拟试验,并在某车型上进行验证。结果表明:SID-IIs假人躯干伤害与碰撞结果的接近度在90%以上,且仅一次即满足对标要求;基于加速台车和蜂窝铝调节开发的侧面台车试验方法,能够更好代替实车进行侧面约束系统开发试验。 相似文献
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Currently, child seats are widely used as a child restraint system (CRS). The effects of CRS are experimentally investigated
according to FMVSS213. In this paper, the dynamic simulation of a child seat is carried out using the LSDYNA software to develop
an advanced CRS. A sled test using an existing child seat is first carried out, and the computer simulations using the LS-DYNA
software are compared to the sled test to validate the dummy model and computer simulation. After matching the sled test and
computer simulation results of a three-point belt-type child seat, a new type of child seat is developed with the computer
simulation and optimization. For weight reduction, an optimization sequence is applied to determine the thickness of each
part. For the area of stress concentration, reinforced members are added. The comparison between the simulation and the sled
test shows good agreement, and the simulation results are proven useful for the further development of an advanced CRS. 相似文献
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在分析惯性仪器测试需求和基本功能的基础上,提出一种通用测试的理念和方法。针对惯性平台测试与故障诊断系统的特点和设计要求,给出了基于VXI总线的惯性平台自动测试与故障诊断系统的开发设计方法,重点探讨了VXI总线测试硬件与软件的组成和实现方法。所提出的系统成功应用于某些型号惯性仪器的性能测试过程,实现了测试过程的优化控制和优化运行,取得了明显的应用成效。 相似文献
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Ji-Yeul Bae Jong Ju Yi Sulki Park Ju Chan Bae Heecheol Ham Hyung Hee Cho 《Journal of Mechanical Science and Technology》2013,27(6):1713-1719
Thermal protection material (TPM) is used to protect rocket structures from extreme conditions created by the hot exhaust of the rocket. Designing TPM is an important step in the rocket design process. Considering that an increase in the system weight decreases the overall performance of a rocket, the amount of TPM is carefully determined during the design process. Therefore, the precise properties of TPM guarantee an accurate thermal analysis and the successful design of the rocket. Among the many properties of TPM, the kinetic constant and activation energy, which govern the thermochemical reaction of the TPM, are the most important. Thus, an experiment to measure the kinetic constant and activation energy is conducted as part of this research. A theoretical approach to deduce the properties from measured data is discussed, and a method to apply the theory to experimental data, termed the R2 method, is developed. Compared to a previous method which was difficult to apply, the R2 method reduces unclear selections of the reaction time and does not require intervention by an interpreter. The properties deduced by the R2 method show good agreement with the other method despite the limited number of experimental results. 相似文献