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Thermal Error Compensation of the Wear-Depth Real-Time Detecting of Self-Lubricating Spherical Plain Bearings 被引量:1
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作者 Zhan-Qi Hu Wei Li +2 位作者 Yu-Lin Yang Bing-Li Fan Hai-Li Zhou 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2018年第5期35-47,共13页
The spherical plain bearing test bench is a necessary detecting equipment in the research process of self?lubricating spherical plain bearings. The varying environmental temperatures cause the thermal deformation of t... The spherical plain bearing test bench is a necessary detecting equipment in the research process of self?lubricating spherical plain bearings. The varying environmental temperatures cause the thermal deformation of the wear?depth detecting system of bearing test benches and then a ect the accuracy of the wear?depth detecting data. However, few researches about the spherical plain bearing test benches can be found with the implementation of the detect?ing error compensation. Based on the self?made modular spherical plain bearing test bench, two main causes of ther?mal errors, the friction heat of bearings and the environmental temperature variation, are analysed. The thermal errors caused by the friction heat of bearings are calculated, and the thermal deformation of the wear?depth detecting sys?tem caused by the varying environmental temperatures is detected. In view of the above results, the environmental temperature variation is the main cause of the two error factors. When the environmental temperatures rise is 10.3 °C, the thermal deformation is approximately 0.01 mm. In addition, the comprehensive compensating model of the thermal error of the wear?depth detecting system is built by multiple linear regression(MLR) and time series analysis. Compared with the detecting data of the thermal errors, the comprehensive compensating model has higher fitting precision, and the maximum residual is only 1 μm. A comprehensive compensating model of the thermal error of the wear?depth detecting system is proposed, which provides a theoretical basis for the improvement of the real?time wear?depth detecting precision of the spherical plain bearing test bench. 展开更多
关键词 self?lubricating spherical plain bearing wear depth Bearing test bench Thermal error Error compensation
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Self Adjusting Feedforward Compensation Tracking Control for Proportional Valve Controlled Motor 被引量:1
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作者 彭熙伟 王渝 王向周 《Journal of Beijing Institute of Technology》 EI CAS 1999年第3期282-287,共6页
Aim Aiming at the position tracking control for valve controlled motor electrohydraulic proportional servo systems mainly driving the static load torque, the tracking performance was studied in the presence of the v... Aim Aiming at the position tracking control for valve controlled motor electrohydraulic proportional servo systems mainly driving the static load torque, the tracking performance was studied in the presence of the variable gain and deadzone. Methods On the basis of conventional composite control with the deadzone compensation method, a comprehensive control approach with the deadzone and self adjusting feedforward compensation was proposed. Results Experimental results showed that the good tracking performance was achieved for the sinusoidal and constant velocity position tracking under a wide variations of load torque. Conclusion The position tracking accuracy for valve controlled motor electrohydraulic proportional servo systems has been solved by using the comprehensive control approach with the deadzone and self adjusting feedforward compensation. 展开更多
关键词 self adjusting feedforward compensation deadzone compensation tracking control electrohydraulic proportional servo system
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ONLINE GRINDING WHEEL WEAR COMPENSATION BY IMAGE BASED MEASURING TECHNIQUES 被引量:10
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作者 WAN Daping HU Dejin +1 位作者 WU Qi ZHANG Yonghong 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2006年第4期509-513,共5页
Automatic compensation of grinding wheel wear in dry grinding is accomplished by an image based online measurement method. A kind of PC-based charge-coupled device image recognition system is schemed out, which detect... Automatic compensation of grinding wheel wear in dry grinding is accomplished by an image based online measurement method. A kind of PC-based charge-coupled device image recognition system is schemed out, which detects the topography changes of the grinding wheel surface. Profile data, which corresponds to the wear and the topography, is measured by using a digital image processing method. The grinding wheel wear is evalualed by analyzing the position deviation of the grinding wheel edge. The online wear compensation is achieved according to the measure results. The precise detection and automatic compensation system is integrated into an open structure CNC curve grinding machine. A practical application is carried out to fulfil the precision curve grinding. The experimental results confirm the benefits of the proposed techniques, and the online detection accuracy is less than 5 um. The grinding machine provides higher precision according to the in-process grinding wheel error compensation. 展开更多
关键词 Grinding wheel wear compensation Online measurement Charge-coupled device (CCD)
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Self-calibration and Compensation of Setting Errors for Surface Profile Measurement of a Microstructured Roll Workpiece 被引量:3
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作者 GAO Wei XU Bin +2 位作者 TAKEISHI Toshiki SHIMIZU Yuki ITO So 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第1期14-22,共9页
Microstructured roll workpieces have been widely used as functional components in the precision industries. Current researches on quality control have focused on surface profile measurement of microstructured roll wor... Microstructured roll workpieces have been widely used as functional components in the precision industries. Current researches on quality control have focused on surface profile measurement of microstructured roll workpieces, and types of measurement systems and measurement methods have been developed. However, low measurement efficiency and low measurement accuracy caused by setting errors are the common disadvantages for surface profile measurement of microstructured roll workpieces. In order to shorten the measurement time and enhance the measurement accuracy, a method for self-calibration and compensation of setting errors is proposed for surface profile measurement of microstructured roll workpieces. A measurement system is constructed for the measurement, in which a precision spindle is employed to rotate the roll workpiece and an air-bearing displacement sensor with a micro-stylus probe is employed to scan the microstructured surface of the roll workpiece. The resolution of the displacement sensor is 0.14 nm and that of the rotary encoder of the spindle was 0.15r~. Geometrical and mathematical models are established for analyzing the influences of the setting errors of the roll workpiece and the displacement sensor with respect to the axis of the spindle, including the eccentric error of the roll workpiece, the offset error of the sensor axis and the zero point error of the sensor output. Measurement experiments are carded out on a roll workpiece on which periodic microstructures are a period of 133 i^m along the circumferential direction. Experimental results demonstrate the feasibility of the self-compensation method. The proposed method can be used to detect and compensate the setting errors without using any additional accurate artifact. 展开更多
关键词 measurement profile setting error self-CALIBRATION compensation microstructure roll workpiece
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The Friction and Wear Properties of the Spherical Plain Bearings with Self-lubricating Composite Liner in Oscillatory Movement 被引量:8
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作者 郭强 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2004年第B10期86-91,共6页
A test method based on the condition simulation and a friction and wear test machine featuring in oscillatory movement were set up for self-lubricating spherical plain bearings (SPB). In the machine the condition para... A test method based on the condition simulation and a friction and wear test machine featuring in oscillatory movement were set up for self-lubricating spherical plain bearings (SPB). In the machine the condition parameters such as load, angle and frequency of oscillation and number of test cycles can be properly controlled. The data relating to the tribological properties of the bearing, in terms of friction coefficient, linear wear amount, temperature near friction surface and applied load, can be monitored and recorded simultaneously during test process by a computerized measuring system of the machine. Efforts were made to improve the measurement technology of the friction coefficient in oscillating motion. In result, a well-designed bearing torque mechanism was developed, which could reveal the relation between the friction coefficient and the displacement of oscillating angle in any defined cycle while the curve of friction coefficient vs number of testing cycles was continuously plotted. The tribological properties and service life of four kinds of the bearings, i.e, the sampleⅠ-Ⅳ with different self-lubricating composite liners, including three kinds of polytetrafluoroethylene (PTFE) fiber weave/epoxy resin composite liners and a PTFE plastic/copper grid composite liner, were evaluated by testing, and the wear mechanisms of the liner materials were analyzed. 展开更多
关键词 spherical plain bearing dry friction self-lubricating liner wear resistant composite oscillatory tester
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On-line metallic wear diagnosis of unlubricated contacts by using self-generated voltage
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作者 翟文杰 高云峰 齐毓霖 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2000年第4期12-15,共4页
On a specially designed ball on disc type tribometer, both the friction coefficients and the self generated voltages (SGVs) for SUJ2/Al and SUJ2/Cu dry rubbing pairs were measured; and the correlation between SGV and ... On a specially designed ball on disc type tribometer, both the friction coefficients and the self generated voltages (SGVs) for SUJ2/Al and SUJ2/Cu dry rubbing pairs were measured; and the correlation between SGV and friction coefficient was ascertained during test. The relationship between the SGVs and the tribological characteristics shows that monitoring SGVs of rubbing pairs can be used as a new on line means for evaluating wear of metallic materials. Moreover, this method has an advantage over the electrical resistance method, which needs externally applied voltage and may introduce some influences on the surface states. 展开更多
关键词 self GENERATED voltage (SGV) friction wear
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Friction-reducing,Anti-wear and Self-repairing Properties of Sulfonated Graphene 被引量:2
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作者 付秀丽 WANG Yong +1 位作者 PAN Yongzhi WANG Xiangyu 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第2期272-277,共6页
The friction reducing properties of sulfonated graphene as a lubricating additive were investigated using a four-ball machine tester with high carbon chromium bearing steels GCr15(SAE52100) friction pairs. The micro... The friction reducing properties of sulfonated graphene as a lubricating additive were investigated using a four-ball machine tester with high carbon chromium bearing steels GCr15(SAE52100) friction pairs. The microscopic morphology, elemental composition, and self-repairing properties were observed and analyzed by using scanning electronic microscopy(SEM), X-ray diffraction(XRD) and digital microscopy. The relationships among sulfonated graphene ethanol solution concentration, friction coefficient, and abrasion loss were revealed. It was found that the optimal concentration of ethanol solution with the addition of sulfonated graphene was 0.15g/m L and the coefficient of friction was only 0.105 under certain condition. Then the stable chemical properties and good anti-corrosion properties of the metal-graphene layer were further confirmed using salt spray corrosion test. In summary, sulfonated graphene can be used as a new kind of self repairing additive, and it has excellent wear-resistant and self-repairing performances. 展开更多
关键词 sulfonated graphene anti-wear self-repairing GCr15
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Code synchronization based on lumped time-delay compensation scheme with a linearly chirped fiber Bragg grating in all-optical analog-to-digital conversion
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作者 王涛 康哲 +4 位作者 苑金辉 田野 颜玢玢 桑新柱 余重秀 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第10期180-185,共6页
We propose a novel lumped time-delay compensation scheme for all-optical analog-to-digital conversion based on soliton self-frequency shift and optical interconnection techniques. A linearly chirped fiber Bragg gratin... We propose a novel lumped time-delay compensation scheme for all-optical analog-to-digital conversion based on soliton self-frequency shift and optical interconnection techniques. A linearly chirped fiber Bragg grating is optimally designed and used to compensate for the entire time-delays of the quantized pulses precisely. Simulation results show that the compensated coding pulses are well synchronized with a time difference less than 3.3 ps, which can support a maximum sampling rate of 151.52 GSa/s. The proposed scheme can efficiently reduce the structure complexity and cost of all-optical analog-to-digital conversion compared to the previous schemes with multiple optical time-delay lines. 展开更多
关键词 all-optical analog-to-digital lumped time-delay compensation soliton self-frequency shift lin-early chirped fiber Bragg grating
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复合纳米自润滑金刚石砂轮磨削SiC陶瓷的试验研究
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作者 汤熊 张松辉 +2 位作者 张晓红 李伟 郭兵 《宇航材料工艺》 CAS CSCD 北大核心 2024年第1期56-66,共11页
提出一种复合纳米自润滑金刚石砂轮的制备方法,并对制备的砂轮进行SiC陶瓷的磨削试验,分析砂轮表面不同质量分数的复合纳米颗粒对磨削性能的影响。使用MoS2、TiO2纳米颗粒作为自润滑砂轮基底的填充材料,采用复合纳米自润滑金刚石砂轮和... 提出一种复合纳米自润滑金刚石砂轮的制备方法,并对制备的砂轮进行SiC陶瓷的磨削试验,分析砂轮表面不同质量分数的复合纳米颗粒对磨削性能的影响。使用MoS2、TiO2纳米颗粒作为自润滑砂轮基底的填充材料,采用复合纳米自润滑金刚石砂轮和传统金刚石砂轮进行磨削对比试验,研究复合纳米自润滑金刚石砂轮的润滑机制。研究结果表明,复合纳米自润滑金刚石砂轮自释放的纳米颗粒有效地参与了磨削区间的润滑,砂轮的法相力、切向力降低,提升了工件表面质量。在磨削深度为2~8μm内,复合纳米自润滑金刚石砂轮的具体表现为法向磨削力降低18.6%~38.7%、切向磨削力降低11.2%~28.6%,工件表面粗糙度降低13.9%~41.5%。根据本试验所得数据,当砂轮表面复合纳米颗粒质量分数为8%时,润滑性能和工件表面质量最佳。 展开更多
关键词 纳米颗粒 自润滑 磨削力 表面质量 砂轮磨损
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立式自吸泵前口环几何参数对其自吸性能的影响
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作者 赵伟国 强欢欢 +1 位作者 许强 刘明建 《排灌机械工程学报》 CSCD 北大核心 2024年第4期333-341,共9页
为探究立式自吸泵前口环几何参数对其自吸性能的影响,以350WFB-1200-50型外混式无密封立式自吸泵为研究对象,在保证自吸泵其他参数不变的情况下,通过改变前口环间隙δ和前口环长度l的数值大小,共设计20种方案.利用数值计算和试验验证相... 为探究立式自吸泵前口环几何参数对其自吸性能的影响,以350WFB-1200-50型外混式无密封立式自吸泵为研究对象,在保证自吸泵其他参数不变的情况下,通过改变前口环间隙δ和前口环长度l的数值大小,共设计20种方案.利用数值计算和试验验证相结合的研究方法,通过定常数值计算得到不同方案外特性曲线图及前口环进出口压差图;通过非定常数值计算得到不同方案不同时刻中间截面气体体积分布云图、不同方案自吸泵出口含气率变化图及不同方案自吸完成时间曲线图来研究立式自吸泵前口环几何参数与其自吸性能的关系.研究发现:前口环间隙δ和前口环长度l对自吸泵自吸性能均有影响,适当减小前口环间隙δ和增大前口环长度l均能提高自吸泵自吸性能,且当前口环间隙δ过大时,其对自吸泵自吸性能的影响大于前口环长度l对自吸泵自吸性能的影响. 展开更多
关键词 立式自吸泵 前口环间隙 前口环长度 自吸性能 自吸时间
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电压自校准的高精度多通道应变信号采集模块
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作者 王浩 王红亮 +1 位作者 王铮 林宏 《仪表技术与传感器》 CSCD 北大核心 2024年第4期24-28,89,共6页
针对现有应变采集设备存在采集精度低、测量范围窄、通道数较少、校准繁琐等问题,设计了一种具备电压自校准的高精度多通道应变信号采集模块,模块以高精度模拟调理转换电路为核心,结合电子线路噪声理论仿真与分析,由自校准电路对采集通... 针对现有应变采集设备存在采集精度低、测量范围窄、通道数较少、校准繁琐等问题,设计了一种具备电压自校准的高精度多通道应变信号采集模块,模块以高精度模拟调理转换电路为核心,结合电子线路噪声理论仿真与分析,由自校准电路对采集通道进行校准,通过补偿远端传输线的激励电压,实现了48通道大应变信号与差分电压信号的高精度测量。测试结果表明:应变信号测量范围可达±100000με,测量精度优于0.05%FS;电压信号测量范围可达±15 V,测量精度优于±(0.025%RD+500μV),准确度高,具备较好的稳定性和通用性。 展开更多
关键词 应变信号采集 自校准 高精度 多通道 补偿远端激励
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锚框校准和空间位置信息补偿的街道场景视频实例分割
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作者 张印辉 赵崇任 +2 位作者 何自芬 杨宏宽 黄滢 《电子学报》 EI CAS CSCD 北大核心 2024年第1期94-106,共13页
街道场景视频实例分割是无人驾驶技术研究中的关键问题之一,可为车辆在街道场景下的环境感知和路径规划提供决策依据.针对现有方法存在多纵横比锚框应用单一感受野采样导致边缘特征提取不充分以及高层特征金字塔空间细节位置信息匮乏的... 街道场景视频实例分割是无人驾驶技术研究中的关键问题之一,可为车辆在街道场景下的环境感知和路径规划提供决策依据.针对现有方法存在多纵横比锚框应用单一感受野采样导致边缘特征提取不充分以及高层特征金字塔空间细节位置信息匮乏的问题,本文提出锚框校准和空间位置信息补偿视频实例分割(Anchor frame calibration and Spatial position information compensation for Video Instance Segmentation,AS-VIS)网络.首先,在预测头3个分支中添加锚框校准模块实现同锚框纵横比匹配的多类型感受野采样,解决目标边缘提取不充分问题.其次,设计多感受野下采样模块将各种感受野采样后的特征融合,解决下采样信息缺失问题.最后,应用多感受野下采样模块将特征金字塔低层目标区域激活特征映射嵌入到高层中实现空间位置信息补偿,解决高层特征空间细节位置信息匮乏问题.在Youtube-VIS标准库中提取街道场景视频数据集,其中包括训练集329个视频和验证集53个视频.实验结果与YolactEdge检测和分割精度指标定量对比表明,锚框校准平均精度分别提升8.63%和5.09%,空间位置信息补偿特征金字塔平均精度分别提升7.76%和4.75%,AS-VIS总体平均精度分别提升9.26%和6.46%.本文方法实现了街道场景视频序列实例级同步检测、跟踪与分割,为无人驾驶车辆环境感知提供有效的理论依据. 展开更多
关键词 街道场景 视频实例分割 锚框校准 空间信息补偿 无人驾驶
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Use Single-chip  Computer to Realize Automatic Compensation for Optical Fiber Sensors
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作者 ① WANG Shouyu,TIAN Guangyun,YIN Guiliang (Yanshan University,Qinhuangdao 066004,CHN) 《Semiconductor Photonics and Technology》 CAS 1996年第4期36-38,57,共4页
Being directed against two kinds of noise in optical fiber sensors,a simple and effective method of automatic compensation for optical fiber sensors is presented.Not only the unstability effect of light source,but als... Being directed against two kinds of noise in optical fiber sensors,a simple and effective method of automatic compensation for optical fiber sensors is presented.Not only the unstability effect of light source,but also zero drift of photoelectronic devices,can be eliminated or enormously restrained with the aid of this method.In another way,by using single-chip microcomputer,the optical fiber sensor system fabricated is connected to a computer network to realize an automatic compensation. 展开更多
关键词 AUTOMATIC compensation COMPUTER Network self-correction OPTICAL FIBER SENSORS
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更道德抑或更社会:绿色消费的自我建构机制
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作者 柴民权 刘可欣 靳菲 《心理科学进展》 CSSCI CSCD 北大核心 2024年第10期1726-1735,共10页
消费者的绿色消费行为不仅出于环境关切的目的,还兼具构建自我身份的功能导向。本文通过梳理绿色消费动机的相关研究,发现个体通过绿色消费进行自我建构的双重机制:发挥道德补偿作用,消弭道德失调状态,重塑个体的内在道德身份;充当社会... 消费者的绿色消费行为不仅出于环境关切的目的,还兼具构建自我身份的功能导向。本文通过梳理绿色消费动机的相关研究,发现个体通过绿色消费进行自我建构的双重机制:发挥道德补偿作用,消弭道德失调状态,重塑个体的内在道德身份;充当社会地位、权力、声望和财富的信号表征体系,彰显个体的外在社会身份。本文进而基于自我建构的理论视角,提出了绿色消费心理动力机制的整合模型。未来研究可从绿色消费自我建构的路径模式、关系机制、研究领域和对象等方面进行深入探讨。 展开更多
关键词 绿色消费 自我建构 道德补偿 信号表征
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石墨烯含量对铜铁基自润滑摩擦材料组织结构及摩擦性能的影响
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作者 付传起 耿奥 +1 位作者 丁亚东 汪滦 《表面技术》 EI CAS CSCD 北大核心 2024年第15期88-99,共12页
目的改善石墨烯与铜铁基摩擦材料的结合方式,探究不同含量的石墨烯对铜铁基摩擦材料组织结构的影响,研究加入不同含量石墨烯时摩擦材料的摩擦性能和摩擦机理。方法采用粉末冶金冷压法制备铜铁基摩擦材料,利用SEM、XRD等分析方法和手段,... 目的改善石墨烯与铜铁基摩擦材料的结合方式,探究不同含量的石墨烯对铜铁基摩擦材料组织结构的影响,研究加入不同含量石墨烯时摩擦材料的摩擦性能和摩擦机理。方法采用粉末冶金冷压法制备铜铁基摩擦材料,利用SEM、XRD等分析方法和手段,探究不同含量石墨烯对摩擦材料的组织结构、综合力学性能和摩擦性能的影响规律,确定最佳工艺参数。结果在铜铁基摩擦材料中加入石墨烯时,其密度和抗压强度随着石墨烯含量的增加呈下降趋势,硬度呈先上升后降低的趋势。在相同转速下,随着石墨烯含量的增加,其摩擦材料的摩擦因数呈下降趋势,磨损率呈现先下降后上升的趋势。在石墨烯的质量分数为0.5%时,摩擦材料的摩擦率最小,为2.52×10^(-9)mm^(3)/(N·m),此时摩擦材料的磨损机理为黏着磨损及少量磨粒磨损。结论在铜铁基摩擦材料中,石墨烯作为润滑组元,与基体的结合性能表现优异,对比石墨烯对铜铁基摩擦材料的影响规律可知,在石墨烯的质量分数为0.5%时,摩擦材料的性能最佳。 展开更多
关键词 铜铁基 石墨烯 自润滑摩擦材料 摩擦性能 磨损率
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织物衬垫磨损对自润滑关节轴承动力学的影响
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作者 郝秀红 田润威 +1 位作者 焦伟 朱恒辉 《华南理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第4期88-94,共7页
自润滑关节轴承在服役过程中,衬垫的磨损导致自润滑关节轴承内外圈之间产生间隙,自润滑运动副间隙的存在加速了内外圈之间的碰撞以及衬垫的进一步磨损,对自润滑关节轴承的动力学特性产生较大的影响。此外,衬垫的磨损还会导致各构件非线... 自润滑关节轴承在服役过程中,衬垫的磨损导致自润滑关节轴承内外圈之间产生间隙,自润滑运动副间隙的存在加速了内外圈之间的碰撞以及衬垫的进一步磨损,对自润滑关节轴承的动力学特性产生较大的影响。此外,衬垫的磨损还会导致各构件非线性特性的恶化,降低自润滑关节轴承的稳定性。为研究织物衬垫磨损对自润滑关节轴承动力学响应的影响,文中建立了带间隙的自润滑关节轴承运动副矢量模型。首先,通过修正Lankarani-Nikravesh(L-N)法向接触力模型和改进的库仑摩擦力模型,对内外圈间隙处的碰撞力进行建模;然后,基于牛顿第二定律建立了含间隙的刚柔耦合动力学方程;最后,分析讨论不同织物衬垫磨损量和不同摩擦因数条件下含间隙的自润滑关节轴承传动系统的动力学特性,并利用相图和Poincare映射图分析了自润滑关节轴承的非线性特性。结果表明:随着织物衬垫磨损量的增加,自润滑关节轴承内圈和外圈的动力学行为表现出非线性特性;衬垫磨损量一定时,随着衬垫摩擦因数的增加,系统稳定性得到提高,抑制了混沌现象的发生。 展开更多
关键词 自润滑关节轴承 衬垫磨损 刚柔耦合动力学 动态特性
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基于双折射晶体透镜的自干涉全息成像系统
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作者 许灿华 薛孔松 +3 位作者 王雅婷 毛梦瑶 周田 曾志平 《实验技术与管理》 CAS 北大核心 2024年第8期88-95,共8页
该文介绍了采用α–BBO双折射晶体透镜进行分光和光程差补偿方法,以及使用偏振相机进行单次采集的自干涉全息成像方法。该方法不需要使用额外器件补偿共轴干涉光路的光程差,适用于非相干白光照明情况下日常物体的全息图采集与图像重建... 该文介绍了采用α–BBO双折射晶体透镜进行分光和光程差补偿方法,以及使用偏振相机进行单次采集的自干涉全息成像方法。该方法不需要使用额外器件补偿共轴干涉光路的光程差,适用于非相干白光照明情况下日常物体的全息图采集与图像重建。该文推导了再现距离与放大率等重要参数,并在此基础上,搭建了单发成像系统,还进行了实验验证。实验通过单次曝光采集了LED灯组的四幅不同偏振态全息图,并用四步相移法得到复振幅全息图,最后通过图像重建算法反演计算获得准确的再现图像。实验验证了基于α–BBO双折射晶体透镜的单次曝光自干涉全息成像方法的三维成像能力。 展开更多
关键词 自干涉全息 双折射晶体透镜 单发成像 光程差补偿
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压差式流量计误差自动化修正算法研究
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作者 黄秀娟 《自动化仪表》 CAS 2024年第5期45-49,共5页
针对在多干扰源扰动下压差式流量计测量结果面临输出不稳、误差较大的问题,提出多源扰动下的压差式流量计误差自动化修正算法。考虑全补偿气体可膨胀性系数、压缩系数、密度系数和流出系数等因素,研究压差式流量计误差自动化修正算法。... 针对在多干扰源扰动下压差式流量计测量结果面临输出不稳、误差较大的问题,提出多源扰动下的压差式流量计误差自动化修正算法。考虑全补偿气体可膨胀性系数、压缩系数、密度系数和流出系数等因素,研究压差式流量计误差自动化修正算法。利用均值滤波滤除信号中的高斯噪声,结合一阶滞后滤波优化卡尔曼滤波算法,修正多源扰动误差。引入自组织算法和Volterra神经网络进一步改进卡尔曼滤波算法,并优化卡尔曼滤波算法的先验模型参数,以实现多源扰动误差的自动化修正。试验结果表明,经该算法控制后:当参考流量为900 m^(3)/h时,示值误差绝对值为0.203%;当参考流量为700 m^(3)/h时,流量计重复性为0.06%。该研究可以有效识别并修正由于多源扰动造成的流量异常值,且流量测量精度较高。 展开更多
关键词 多源扰动 压差式流量计 误差数据 误差自动化修正 卡尔曼滤波 误差补偿 自组织算法 Volterra神经网络
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食品协作机器人动态目标抓取控制方法研究 被引量:2
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作者 程鹏飞 刘明堂 孙晨 《食品与机械》 CSCD 北大核心 2024年第1期95-100,共6页
目的:解决目前协作机器人在食品动态目标抓取中存在的准确性较低问题。方法:基于协作机器人体系结构,提出将模糊自整定PID控制和鲁棒自适应补偿器相结合用于协作机器人食品动态目标抓取。PID结合模糊控制完成参数自整定,鲁棒算法与自适... 目的:解决目前协作机器人在食品动态目标抓取中存在的准确性较低问题。方法:基于协作机器人体系结构,提出将模糊自整定PID控制和鲁棒自适应补偿器相结合用于协作机器人食品动态目标抓取。PID结合模糊控制完成参数自整定,鲁棒算法与自适应算法相结合用于系统不确定性补偿。通过试验分析了所提方法的性能,验证了该方法的可行性。结果:所提方法在协作机器人动态目标抓取中具有较好的效果,提高了协作机器人动态抓取的准确性,在传送带速度100 mm/s时,动态抓取成功率达到99.50%,对食品动态目标抓取具有一定的应用价值。结论:通过优化现有目标抓取控制方法,可有效提高协作机器人的抓持精度。 展开更多
关键词 协作机器人 动态目标抓取 模糊自整定PID控制 鲁棒自适应补偿器 抓取控制方法
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