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Gyroscope Dynamic Balance Counterweight Prediction Based on Multi-Head ResGAT Networks
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作者 Wuyang Fan Shisheng Zhong 《Computer Modeling in Engineering & Sciences》 SCIE EI 2024年第6期2525-2555,共31页
The dynamic balance assessment during the assembly of the coordinator gyroscope significantly impacts the guidance accuracy of precision-guided equipment.In dynamic balance debugging,reliance on rudimentary counterwei... The dynamic balance assessment during the assembly of the coordinator gyroscope significantly impacts the guidance accuracy of precision-guided equipment.In dynamic balance debugging,reliance on rudimentary counterweight empirical formulas persists,resulting in suboptimal debugging accuracy and an increased repetition rate.To mitigate this challenge,we present a multi-head residual graph attention network(ResGAT)model,designed to predict dynamic balance counterweights with high precision.In this research,we employ graph neural networks for interaction feature extraction from assembly graph data.An SDAE-GPC model is designed for the assembly condition classification to derive graph data inputs for the ResGAT regression model,which is capable of predicting gyroscope counterweights under small-sample conditions.The results of our experiments demonstrate the effectiveness of the proposed approach in predicting dynamic gyroscope counterweight in its assembly process.Our approach surpasses current methods in mitigating repetition rates and enhancing the assembly efficiency of gyroscopes. 展开更多
关键词 gyroscope COUNTERWEIGHT ASSEMBLY small-sample ResGAT repetition rate
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Quasi-anti-parity–time-symmetric single-resonator micro-optical gyroscope with Kerr nonlinearity
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作者 耿靖童 徐书逸 +4 位作者 靳婷 丁舒林 杨柳 王颖 张勇刚 《Chinese Physics B》 SCIE EI CAS CSCD 2024年第1期436-440,共5页
Parity–time(PT) and quasi-anti-parity–time(quasi-APT) symmetric optical gyroscopes have been proposed recently which enhance Sagnac frequency splitting. However, the operation of gyroscopes at the exceptional point(... Parity–time(PT) and quasi-anti-parity–time(quasi-APT) symmetric optical gyroscopes have been proposed recently which enhance Sagnac frequency splitting. However, the operation of gyroscopes at the exceptional point(EP) is challenging due to strict fabrication requirements and experimental uncertainties. We propose a new quasi-APT-symmetric micro-optical gyroscope which can be operated at the EP by easily shifting the Kerr nonlinearity. A single resonator is used as the core sensitive component of the quasi-APT-symmetric optical gyroscope to reduce the size, overcome the strict structural requirements and detect small rotation rates. Moreover, the proposed scheme also has an easy readout method for the frequency splitting. As a result, the device achieves a frequency splitting 10~5 times higher than that of a classical resonant optical gyroscope with the Earth's rotation. This proposal paves the way for a new and valuable method for the engineering of micro-optical gyroscopes. 展开更多
关键词 optical gyroscopes quasi-anti-parity–time(quasi-APT)symmetric system exceptional point(EP) the Kerr nonlinearity
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Research on the strain gauge mounting scheme of track wheel force measurement system based on high-speed wheel/rail relationship test rig
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作者 Yuanwu Cai Bo Chen Chongyi Chang 《Railway Sciences》 2024年第4期503-513,共11页
Purpose-This paper aims to analyze the stress and strain distribution on the track wheel web surface and study the optimal strain gauge location for force measurement system of the track wheel.Design/methodology/appro... Purpose-This paper aims to analyze the stress and strain distribution on the track wheel web surface and study the optimal strain gauge location for force measurement system of the track wheel.Design/methodology/approach-Finite element method was employed to analyze the stress and strain distribution on the track wheel web surface under varying wheel-rail forces.Locations with minimal coupling interference between vertical and lateral forces were identified as suitable for strain gauge installation.Findings-The results show that due to the track wheel web’s unique curved shape and wheel-rail force loading mechanism,both tensile and compressive states exit on the surface of the web.When vertical force is applied,Mises stress and strain are relatively high near the inner radius of 710 mm and the outer radius of 1110mmof the web.Under lateral force,high Mises stress and strain are observed near the radius of 670mmon the inner and outer sides of the web.As the wheel-rail force application point shifts laterally toward the outer side,the Mises stress and strain near the inner radius of 710 mm of the web gradually decrease under vertical force while gradually increasing near the outer radius of 1110 mm of the web.Under lateral force,the Mises stress and strain on the surface of the web remain relatively unchanged regardless of the wheel-rail force application point.Based on the analysis of stress and strain on the surface of the web under different wheel-rail forces,the inner radius of 870 mm is recommended as the optimal mounting location of strain gauges for measuring vertical force,while the inner radius of 1143 mm is suitable for measuring lateral force.Originality/value-The research findings provide valuable insights for determining optimal strain gauge locations and designing an effective track wheel force measurement system. 展开更多
关键词 Track wheel High-speed wheel/rail relationship test rig Instrumented wheelset Strain gauge Finite element
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RIG-Ⅰ、USP5在卵巢上皮性癌组织中的表达水平及预后意义
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作者 齐曼 芦秋彤 +3 位作者 刘少卿 张娟 崔艳萍 刘咏梅 《中南医学科学杂志》 CAS 2023年第2期277-280,共4页
目的 探讨维甲酸诱导基因-Ⅰ(RIG-Ⅰ)、泛素特异性肽酶5(USP5)在卵巢上皮性癌组织中的表达水平及预后意义。方法 选取98例卵巢上皮性癌组织样本为病例组,同期98例正常卵巢组织为对照组。免疫组化法测定两组RIG-Ⅰ、USP5表达水平。单因... 目的 探讨维甲酸诱导基因-Ⅰ(RIG-Ⅰ)、泛素特异性肽酶5(USP5)在卵巢上皮性癌组织中的表达水平及预后意义。方法 选取98例卵巢上皮性癌组织样本为病例组,同期98例正常卵巢组织为对照组。免疫组化法测定两组RIG-Ⅰ、USP5表达水平。单因素及多因素Cox回归分析RIG-Ⅰ、USP5表达水平与卵巢上皮性癌患者临床预后的关系。结果 病例组RIG-Ⅰ、USP5表达阳性率均高于对照组(P<0.05)。卵巢上皮性癌患者RIG-Ⅰ、USP5表达与肿瘤最大径、TNM分期、肿瘤浸润、分化程度、淋巴结转移、复发率相关(P<0.05)。RIG-Ⅰ、USP5阳性的卵巢上皮性癌患者5年生存率均分别低于RIG-Ⅰ、USP5阴性的卵巢上皮性癌患者(P<0.05)。单因素分析显示:肿瘤最大径≥2 cm、TNM分期Ⅲ~Ⅳ期、浸润深度≥1 cm、分化程度高、淋巴结转移、复发、RIG-Ⅰ阳性、USP5阳性的卵巢上皮性癌患者5年生存率分别低于肿瘤最大径<2 cm、TNM分期Ⅰ~Ⅱ期、浸润深度<1 cm/无浸润、分化程度低、无淋巴结转移、无复发、RIG-Ⅰ阴性、USP5阴性的卵巢上皮性癌患者(P<0.05)。多因素Cox回归分析显示:TNM分期Ⅲ~Ⅳ期、分化程度高、RIG-Ⅰ和USP5表达阳性均是影响卵巢上皮性癌患者预后的独立危险因素(P<0.05)。结论 RIG-Ⅰ、USP5与卵巢上皮性癌患者临床病理特征相关;RIG-Ⅰ、USP5阳性表达是卵巢上皮性癌预后危险因素。 展开更多
关键词 维甲酸诱导基因Ⅰ 泛素特异性肽酶5 卵巢上皮性癌
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Model predictive control of rigid spacecraft with two variable speed control moment gyroscopes 被引量:3
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作者 Pengcheng WU Hao WEN +1 位作者 Ti CHEN Dongping JIN 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2017年第11期1551-1564,共14页
In this paper, an attitude maneuver control problem is investigated for a rigid spacecraft using an array of two variable speed control moment gyroscopes (VSCMGs) with gimbal axes skewed to each other. A mathematica... In this paper, an attitude maneuver control problem is investigated for a rigid spacecraft using an array of two variable speed control moment gyroscopes (VSCMGs) with gimbal axes skewed to each other. A mathematical model is constructed by taking the spacecraft and the gyroscopes together as an integrated system, with the coupling interaction between them considered. To overcome the singular issues of the VSCMGs due to the conventional torque-based method, the first-order derivative of gimbal rates and the second-order derivative of the rotor spinning velocity, instead of the gyroscope torques, are taken as input variables. Moreover, taking external disturbances into account, a feedback control law is designed for the system based on a method of nonlinear model predictive control (NMPC). The attitude maneuver can be realized fast and smoothly by using the proposed controller in this paper. 展开更多
关键词 integrated system variable speed control moment gyroscope (VSCMG) nonlinear model predictive control (NMPC)
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Online asymmetry estimation for whole angle mode coriolis vibratory gyroscopes by high frequency injection 被引量:1
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作者 Xiang-rui Meng Chong Li Yu-chen Wang 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2023年第6期314-325,共12页
The whole angle mode gyroscope(WAMG)is considered to be the next generation architecture,but it is suffered from the asymmetry errors to conduct real products.This paper proposes a novel high frequency injection based... The whole angle mode gyroscope(WAMG)is considered to be the next generation architecture,but it is suffered from the asymmetry errors to conduct real products.This paper proposes a novel high frequency injection based approach for the error parameters online identification for the WAMG.The significance is that it can separate physical and error fingerprints to enable online calibration.The nonlinear WAMG dynamics are discretized to meet the requirement of numerical precision and computation efficiency.The optimized estimation methods are then constructed and compared to track asymmetry error parameters continuously.In the validation part,its results firstly prove that the proposed scheme can accurately identify constant asymmetry parameters with an overall tracking error of less than 1 ppm and the extreme numerical convergence can reach 10^(-12)ppm.Under the dynamic asymmetry variation condition,the root mean square errors(RMSE)indicate that the tracking accuracy can reach the level of10^(-3),which shows the robustness of the proposed scheme.In summary,the proposed method can effectively estimate the WAMG asymmetry errors online with satisfied performance and practical values. 展开更多
关键词 Rate-integrating gyroscope(rig) Whole angle mode gyroscope(WAMG) Coriolis vibrating gyroscope(CVG) Online calibration Online identification Online estimation
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猪肠道组织RIG-I的表达及其在猪传染性胃肠炎病毒致病机制中作用的初步研究 被引量:4
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作者 王文哲 李亮 +2 位作者 何豪杰 薛美 冯力 《中国预防兽医学报》 CAS CSCD 北大核心 2023年第2期161-168,共8页
为探究天然免疫分子维甲酸诱导基因Ⅰ(RIG-I)在猪肠道组织中的表达情况,评价其在猪传染性胃肠炎病毒(TGEV)致病机制中的作用。本研究经原核表达重组RIG-I蛋白(rRIG-1)并采用SDS-PAGE切胶纯化该蛋白,将其免疫大白兔制备兔RIG-I多克隆抗体... 为探究天然免疫分子维甲酸诱导基因Ⅰ(RIG-I)在猪肠道组织中的表达情况,评价其在猪传染性胃肠炎病毒(TGEV)致病机制中的作用。本研究经原核表达重组RIG-I蛋白(rRIG-1)并采用SDS-PAGE切胶纯化该蛋白,将其免疫大白兔制备兔RIG-I多克隆抗体,采用间接ELISA检测抗体效价。结果显示获得了效价可达1∶64000的兔RIG-I多克隆抗体。利用该抗体经western blot检测SPF猪各肠道组织中RIG-I的表达。结果显示,制备的多克隆抗体可与猪各肠道中的RIG-I反应,且RIG-I在SPF猪空肠中的表达量最高。利用该抗体经western blot检测TGEV感染的ST细胞及猪空肠中RIG-I的表达水平。结果显示,TGEV感染后ST细胞中RIG-I的表达水平极显著高于空白对照细胞(P<0.01);与正常SPF猪空肠相比,TGEV感染的SPF猪空肠组织中RIG-I蛋白的表达水平明显提高。表明TGEV感染后能够刺激细胞内源性及感染猪肠道组织中RIG-I蛋白的表达水平。将本研究构建的重组质粒pCAGGS-RIG-I-flag和RIG-I干扰RNA(siRIG-I)分别转染ST细胞,采用western blot鉴定RIG-I的过表达和敲低效果后,再利用TGEV感染,24 h后采用qPCR检测RIG-I对上述ST细胞中IFN-β转录水平的影响;收集细胞上清,采用TCID50方法测定病毒滴度。qPCR及病毒滴度的测定结果显示,与转染空载体的对照组相比,RIG-I过表达的ST细胞中IFN-β的转录水平极显著升高(P<0.001),且细胞上清中的病毒滴度下降约75%;与转染NCsiRNA的对照组相比,敲低RIG-I的ST细胞中IFN-β的转录水平极显著下降(P<0.001),且细胞上清中的病毒滴度升高约4.8倍。表明,TGEV感染细胞中的RIG-I能够促进细胞中IFN-β的转录,提高宿主细胞的抗病毒免疫反应,从而抑制病毒的复制。本研究结果证实RIG-I在介导TGEV诱导宿主细胞产生IFN的过程中发挥重要作用,该结果为深入探究TGEV的致病机制奠定了实验基础。 展开更多
关键词 维甲酸诱导基因I(rig-I) 多克隆抗体 猪传染性胃肠炎病毒 干扰素Β 致病机制
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ZNF205通过靶向RIG-I正调控RLR抗病毒信号通路
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作者 钟霓 王晨 +1 位作者 翁光秀 许亮国 《免疫学杂志》 CAS CSCD 北大核心 2023年第8期708-713,共6页
目的探究ZNF205(zinc finger protein 205)对RIG-I(retinoic acid-inducible gene I)介导的RLR(RIG-I like receptors,RLRs)抗病毒信号通路的影响。方法采用免疫共沉淀、免疫印迹、非变性聚丙烯酰胺凝胶电泳、双荧光素酶报告基因实验、... 目的探究ZNF205(zinc finger protein 205)对RIG-I(retinoic acid-inducible gene I)介导的RLR(RIG-I like receptors,RLRs)抗病毒信号通路的影响。方法采用免疫共沉淀、免疫印迹、非变性聚丙烯酰胺凝胶电泳、双荧光素酶报告基因实验、实时荧光定量PCR、病毒空斑等实验探索ZNF205在RLRs信号通路中的作用。结果ZNF205与RIG-I相互作用。过表达ZNF205促进了SeV诱导的IRF3(interferon regulatory factor 3)的二聚化,也增强了RIG-I-N(aa1-284)介导或SeV诱导的IFN-β(interferon beta)启动子的活性,同时还增强了SeV诱导的IFN-β的转录。病毒空斑实验结果显示过表达ZNF205能够抑制病毒的复制。研究结果还表明,ZNF205促进RIG-I的泛素化修饰以及RIG-I的K63泛素化修饰。结论ZNF205在RLR抗病毒先天免疫信号通路中起正调控作用。 展开更多
关键词 ZNF205 rig-I 泛素化 RLR信号抗病毒信号通路
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Design and simulation of a silicon-based hybrid integrated optical gyroscope system
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作者 孙道鑫 张东亮 +4 位作者 鹿利单 徐涛 郑显通 周哲海 祝连庆 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第4期397-404,共8页
By combining a silicon-based lithium niobate modulator and a silicon-based Si3N4resonator with silicon-based photonics technology,a highly systematic design of a hybrid integrated optical gyroscope with enhanced recip... By combining a silicon-based lithium niobate modulator and a silicon-based Si3N4resonator with silicon-based photonics technology,a highly systematic design of a hybrid integrated optical gyroscope with enhanced reciprocity sensitivity and a dual micro-ring structure is proposed for the first time in this paper.The relationship between the device's structural parameters and optical performance is also analyzed by constructing a complete simulation link,which provides a theoretical design reference to improve the system's sensitivity.When the wavelength is 1550 nm,the conversion frequency of the dual-ring optical path is 50 MHz,the coupling coefficient is 0.2,and the radius R is 1000μm,the quality factor of the silicon-based Si_(3)N_(4)resonator is 2.58×10^(5),which is 1.58 times that of the silicon-on-insulator resonator.Moreover,the effective number of times the light travels around the ring before leaving the micro-ring is 5.93,which is 1.62 times that of the silicon-on-insulator resonator.The work fits the gyro dynamic output diagram,and solves the problem of low sensitivity at low speed by setting the phase offset.This results provide a basis for the further optimization of design and chip processing of the integrated optical gyroscope. 展开更多
关键词 silicon photonics integrated optical gyroscope micro-ring resonator Sagnac effect
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Development of a Test Rig for Axial Strains Measurement in Automobile Wheel
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作者 Samuel Onoriode Igbudu David Abimbola Fadare 《Open Journal of Applied Sciences》 2023年第10期1764-1777,共14页
In automobile wheel application, a test rig is vital and used to simulate conditions of the wheel in service in order to affirm the safety and reliability of the wheel. The present work designed a test rig for measuri... In automobile wheel application, a test rig is vital and used to simulate conditions of the wheel in service in order to affirm the safety and reliability of the wheel. The present work designed a test rig for measuring axial strains in automobile wheel. The wheel used was a five-arm wheel (6JX14H2;ET 42) and Tyre (175 × 65 R 14). Experimental (EXP) test was carried out, with a radial load of 4750 N and inflation pressure of 0.3 MPa, to measure the axil strains which were converted to maximum principal strain values and, compared with data from Finite Element Analysis (FEA) using Creo-Element/Pro 5.0 at wheel’s contact angles of 90 degree (FEA 90 deg), 40 degree (FEA 40 deg) and 30.25 degree (FEA 30.25 deg), respectively. Results show that at the wheel’s point of contact with the ground, maximum principal strain values were highest at the inboard bead seat with a value of about 5.69 × 10<sup>-4</sup> mm/mm, followed by the values at the well of about 5.66 × 10<sup>-4</sup> mm/mm. The value at the outboard bead seat was least at about 2.22 × 10<sup>-4</sup> mm/mm, which was due to the presence of spikes at this location that tends to resist imposed radial loads. However, the highest mean maximum principal strain values at the locations of inboard, well and outboard, were about 2.11 × 10<sup>-4</sup> mm/mm, 3.78 × 10<sup>-4</sup> mm/mm and .99 × 10<sup>-4</sup> mm/mm, respectively. With the highest single value of about 5.69 × 10<sup>-4</sup> mm/mm, the inboard bead seat was the most strained location of the wheel. Overall results showed that all values of maximum principal strains were below the threshold value of about 1 × 10<sup>-2</sup> mm/mm. The values obtained for EXP and FEA could be said to be in close agreement when compared with the threshold value. With this in mind, the rig is recommended for use in related experimental procedures. 展开更多
关键词 Test rig STRAIN Contact Angle Radial Load Inflation Pressure
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基于整车路面谱的副车架开裂台架试验及仿真 被引量:2
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作者 潘公宇 徐锐 杨晓峰 《郑州大学学报(工学版)》 北大核心 2024年第1期29-33,63,共6页
针对前悬架稳定杆与副车架连接处在整车试验场耐久测试过程中出现的疲劳破坏问题,通过对稳定杆进行贴片标定,获得了试验场环境下稳定杆的连杆力和稳定杆扭转相对位移的强化耐久路谱,设计搭建了稳定杆副车架系统的物理台架,并按照耐久性... 针对前悬架稳定杆与副车架连接处在整车试验场耐久测试过程中出现的疲劳破坏问题,通过对稳定杆进行贴片标定,获得了试验场环境下稳定杆的连杆力和稳定杆扭转相对位移的强化耐久路谱,设计搭建了稳定杆副车架系统的物理台架,并按照耐久性规范进行了台架试验。试验结果表明:该台架试验装置能良好地再现整车耐久路试下的断裂位置,疲劳寿命相对于整车耐久路试的疲劳寿命偏差仅为2.5%。在此基础上,建立了稳定杆与副车架多体的仿真模型,设定了与系统试验台架相同的约束边界,通过虚拟迭代的方法及准静态有限元疲劳寿命分析法对系统进行了仿真分析。仿真得到稳定杆连杆力和稳定杆扭转相对位移信号,与测试结果进行对比分析可以看出,时域下相位和幅值重合度良好,频域下的PSD谱重合度较高,穿级计数载荷统计基本一致,载荷相对损伤均在1附近,相关风险位置处的仿真疲劳寿命与整车耐久试验寿命偏差比为6.25%,获得了较高精度的风险位置载荷,实现了耐久风险位置的复现。最后,基于仿真模型对副车架风险位置处进行了结构优化设计,改进后的方案顺利通过了后续的台架试验和整车耐久路试。 展开更多
关键词 台架试验 耐久 虚拟迭代 疲劳仿真 相关性
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基于MEMS陀螺的高温随钻定向测斜仪研究 被引量:1
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作者 杨永友 底青云 +4 位作者 谢棋军 马良令 王京京 张露 任春华 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2024年第4期1669-1677,共9页
针对油气井测量时所面临的小孔径、超深井、温度范围广、温度变化率高、工作时间长等挑战,研究了基于MEMS陀螺仪的定向测斜仪,设计了MEMS陀螺定向测斜仪软硬件系统.为确保该环境下的测量精度提出了一种动态温度补偿方案,并采用基于小波... 针对油气井测量时所面临的小孔径、超深井、温度范围广、温度变化率高、工作时间长等挑战,研究了基于MEMS陀螺仪的定向测斜仪,设计了MEMS陀螺定向测斜仪软硬件系统.为确保该环境下的测量精度提出了一种动态温度补偿方案,并采用基于小波滤波多尺度分析的方法对动态温变环境下陀螺输出信号进行去噪滤波处理,以实现定向测斜仪系统的测量精度.论文给出了定向测斜仪硬件系统方案、定向测斜算法、小波多尺度滤波算法.测试结果表明:该系统在常温和动态温变环境下井斜方位角精度优于±2°,井斜角精度优于±0.1°,工作温度最高150℃,可适应我国深层油气井勘探开发的应用场景需求. 展开更多
关键词 定向测斜仪 动态温变环境 MEMS陀螺 零偏补偿
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基于改进自适应滤波的MEMS陀螺振动误差抑制研究 被引量:1
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作者 陈杰 侯帅康 +1 位作者 刘玉县 何春华 《传感器与微系统》 CSCD 北大核心 2024年第4期61-63,67,共4页
本文提出一种基于改进自适应滤波的MEMS陀螺随机振动误差的补偿算法。该算法采用简化Sage-Husa自适应滤波算法估计量测噪声,并通过协方差匹配技术引入收敛性判据抑制了滤波的发散,它提高了实时性且减少了计算量。实验结果表明:经过改进... 本文提出一种基于改进自适应滤波的MEMS陀螺随机振动误差的补偿算法。该算法采用简化Sage-Husa自适应滤波算法估计量测噪声,并通过协方差匹配技术引入收敛性判据抑制了滤波的发散,它提高了实时性且减少了计算量。实验结果表明:经过改进算法滤波后,MEMS陀螺随机振动误差的方差减少97.76%,与常规卡尔曼滤波相比,改进算法的方差减少了72.66%,验证了改进的自适应卡尔曼滤波算法可以有效地抑制MEMS陀螺因随机振动引起的输出误差。 展开更多
关键词 MEMS陀螺 简化Sage-Husa自适应滤波 时间序列模型
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Finite Element Analysis of Jumbo Rig Assembly for Tunneling
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作者 YAO Haiping 《International Journal of Plant Engineering and Management》 2023年第1期59-64,共6页
This paper describes the force acting the assembly of the jumbo rig for tunneling.The finite element analysis is used to calculate this machine structure on its different working states.
关键词 jumbo rig for tunneling fea STRESS DEFORMATION failure analysis
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The Correlation of Gyroscope Axial Velocities
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作者 Ryspek Usubamatov 《Journal of Mechanical Materials and Mechanics Research》 2023年第1期36-40,共5页
In engineering,all movable expanse revolving objects manifest gyroscopic effects.These effects are created by the action of the outer load on the revolving items whose rotating mass originates eight inertial torques a... In engineering,all movable expanse revolving objects manifest gyroscopic effects.These effects are created by the action of the outer load on the revolving items whose rotating mass originates eight inertial torques about two axes.Two torques of centrifugal forces,one torque of the Coriolis force originated by the rotating distributed mass,and the torque of the change in the angular momentum of the center mass act about each axis.The inertial torques activate rotations of the gyroscope by the determined correlation.Inertial torques depend on their geometry and orientation at the spatial coordinate system.The known analytical model for the rotation of the revolving disc about axes contains a mechanical error.This error was obtained by the incorrect integration of the centrifugal inertial torque.The corrected inertial torque yields the accurate expression for the interacted rotations of the revolving disc about axes. 展开更多
关键词 gyroscope theory Inertial torque Correlation of angular velocities
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量子传感(Ⅱ):关键技术与典型代表 被引量:1
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作者 郭弘 吴腾 +1 位作者 罗斌 刘院省 《物理》 CAS 北大核心 2024年第6期384-394,共11页
作为量子信息感知物理实现基础的量子传感技术是三大核心量子技术之一,也是发展历史最悠久、技术成熟度最高、实际应用范围最广、潜在应用最多的量子技术。文章是量子传感综述论文的第二部分,在第一部分的基础上,介绍了量子传感的关键... 作为量子信息感知物理实现基础的量子传感技术是三大核心量子技术之一,也是发展历史最悠久、技术成熟度最高、实际应用范围最广、潜在应用最多的量子技术。文章是量子传感综述论文的第二部分,在第一部分的基础上,介绍了量子传感的关键技术以及量子传感器的典型代表。其中,关键技术方面,结合量子态的制备、操控、探测,概括了量子传感具备颠覆性能力的核心原理及技术支撑;典型代表方面,详细介绍了频率、电、磁、重力、惯性等代表性量子传感器技术,以及各类量子传感器的基本原理、实现平台及发展现状。 展开更多
关键词 量子传感器 量子频标 量子电磁传感器 量子重力仪 量子陀螺仪
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基于改进EMD和ARMA的MEMS陀螺仪随机误差补偿方法 被引量:1
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作者 曾鑫 先苏杰 +2 位作者 王康 司鹏 吴志林 《兵工学报》 EI CAS CSCD 北大核心 2024年第9期3297-3306,共10页
微机电系统(Micro-Electro-Mechanical System,MEMS)陀螺仪的随机误差限制了其测量精度。为了降低MEMS陀螺仪的随机误差,提出一种基于改进的经验模态分解(Empirical Mode Decomposition,EMD)和优化的自回归滑动平均(Autoregressive Movi... 微机电系统(Micro-Electro-Mechanical System,MEMS)陀螺仪的随机误差限制了其测量精度。为了降低MEMS陀螺仪的随机误差,提出一种基于改进的经验模态分解(Empirical Mode Decomposition,EMD)和优化的自回归滑动平均(Autoregressive Moving Average,ARMA)模型的方法。该方法在传统EMD的基础上,结合Hausdorff距离和累积标准化模态均值以提取信号中的噪声和趋势项,对剩余信号进行ARMA建模和滤波。采用沙猫群优化算法优化建模的定阶过程,采用改进的自适应滤波补偿随机误差。试验结果表明:相较于传统EMD和传统ARMA方法,新方法在静态试验中得到的均方根误差分别降低52.5%和34.4%,在动态试验中得到的均方根误差分别降低50%和32.35%;新方法有效抑制了随机误差,提升了MEMS陀螺仪的使用精度。 展开更多
关键词 微机电系统 陀螺仪 改进经验模态分解 时间序列建模 HAUSDORFF距离 自适应滤波
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中国石油井下作业数字化监督发展问题与对策 被引量:2
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作者 张绍辉 黄伟和 +5 位作者 毕国强 张晓辉 张建利 文虎成 李海军 田涛 《石油工业技术监督》 2024年第5期1-7,共7页
阐述了中国石油井下作业数字化监督在监督人员数字化管理、施工队伍数字化监督、施工作业数字化监督、井场环境数字化监督4个方面的发展现状。分析了井下作业数字化监督发展面临数字化监督管理制度不健全、监督数据标准不统一、数字化... 阐述了中国石油井下作业数字化监督在监督人员数字化管理、施工队伍数字化监督、施工作业数字化监督、井场环境数字化监督4个方面的发展现状。分析了井下作业数字化监督发展面临数字化监督管理制度不健全、监督数据标准不统一、数字化智能监督技术不完善、缺少统一的数字化智能监督平台、监督数据价值挖掘不深入5个方面的主要问题。提出了制定井下作业数字化监督管理制度、建立井下作业监督数据标准、攻关数字化智能监督关键技术、研发井下作业数字化智能监督平台、提升监督大数据分析应用水平5项数字化监督发展对策。展望了井下作业数字化监督建设发展后在提升监督人员履职效率、降低监督人力资源成本、提升工程质量、保障施工安全与环保4个方面的预期成效。 展开更多
关键词 井下作业 数字化监督 数据标准 修井机 视频监控 监督平台
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光学陀螺旋转调制惯导系统及关键技术发展
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作者 查峰 卜浩宇 +1 位作者 戴海发 童余德 《弹箭与制导学报》 北大核心 2024年第5期25-37,共13页
面向长航时、高精度的自主导航技术需求,系统梳理光学陀螺旋转调制惯导系统的发展历程及关键技术现状具有重要的现实意义。首先,基于惯导系统误差特性,阐述了旋转调制技术的基本原理。其次,系统回顾和梳理欧美等西方国家旋转惯导系统发... 面向长航时、高精度的自主导航技术需求,系统梳理光学陀螺旋转调制惯导系统的发展历程及关键技术现状具有重要的现实意义。首先,基于惯导系统误差特性,阐述了旋转调制技术的基本原理。其次,系统回顾和梳理欧美等西方国家旋转惯导系统发展历程,分析了系统发展演变后的技术逻辑,总结了我国旋转惯导系统的研制现状。最后,立足于提高系统自主导航精度,从旋转策略优化、误差标校、初始对准3个方面分析了旋转惯导系统需解决的关键技术及研究现状。在总结光学陀螺旋转调制惯导系统及关键技术发展基础上,针对后续旋转惯导系统研究提出了几点思考,为高精度自主导航技术研究提供参考。 展开更多
关键词 激光陀螺 光纤陀螺 旋转调制 旋转惯导 旋转策略 惯性导航 误差补偿 在线标定
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热振子式Z轴MEMS角速度陀螺敏感机理的研究
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作者 朴林华 佟嘉程 +1 位作者 李备 张严 《传感技术学报》 CAS CSCD 北大核心 2024年第2期189-194,共6页
揭示了一种热振子式Z轴MEMS角速度陀螺的敏感机理。在给出工作原理、热振子的振动模态和陀螺效应的基础上,对敏感结构内的温度场进行了计算。结果表明:(1)开机1.8 s后在敏感结构内形成一个稳定的温度场。(2)热振子在Y方向建立驱动模态,... 揭示了一种热振子式Z轴MEMS角速度陀螺的敏感机理。在给出工作原理、热振子的振动模态和陀螺效应的基础上,对敏感结构内的温度场进行了计算。结果表明:(1)开机1.8 s后在敏感结构内形成一个稳定的温度场。(2)热振子在Y方向建立驱动模态,当沿着Z轴输入角速度时,在哥氏力的作用下热振子沿着X方向移动,造成温度场偏移,X方向上对称平行设置的两热线温差ΔT_(X)随着输入加速度az的加大呈现线性增长,温度灵敏度为125 mK/(°/s)。(3)根据输入-输出ω_(z)-V_(Xout)特性曲线,得到数学模型,揭示了该陀螺的敏感机理,陀螺灵敏度为0.095 mV/(°/s),非线性度为2.97%。本研究为优化结构奠定了实用理论基础。 展开更多
关键词 陀螺 敏感机理 陀螺效应 数学模型 微机械 热振子
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