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Flow Field Simulation and Parameter Analysis of Hydraulic Unbalanced Bionic Self-recovery Actuator for Rotary Equipment

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Journal of Bionic Engineering 2024年第1期21卷 325-343页

作者： Wei Li Xin Pan Dehong Ge jinji gao Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of High-End Mechanical Equipment Health Monitoring and Self-Recovery Beijing University of Chemical TechnologyBeijing 100029China

The rotor is the most important component of rotating machinery,and the vibration produced by its mass unbalance has a serious influence on the secure and steady operation of the machine,so an effective online suppression technology is urgently needed.A new hydraulic unbalanced bionic self-recovery system is introduced,imitating the way of manually repairing faulty *** accomplish the effect of actuator mass redistribution,the technology employs pressurized air to drive the quantitative transfer of liquid in the reservoir cavity at opposite *** can complete the online adjustment of the equipment's balancing state and suppress the unbalanced vibration of equipment in real time,which gives the equipment the ability to maintain an autonomous health state and improve equipment *** composition and working principle of the system are introduced in detail,and the key performance parameters,such as the minimum running speed and the balancing liquid transfer speed,are analyzed *** fluid-solid coupling model of the actuator was established,and the two-phase flow from inside the hydraulic unbalanced bionic self-recovery actuator was simulated under multiple working conditions and the performance parameters were quantitatively analyzed.A balancing simulation test bed was built,and its effectiveness was verified by performance parameter tests and unbalanced bionic self-recovery *** experimental results show that the mass distribution adjustment of the balancing disk can be achieved using different viscosity balancing liquid,and the response of liquid viscosity 10 cSt is faster than that of liquid viscosity 100 cSt in the process of balancing liquid transfer,and the time is reduced by more than 75%;the system can reduce the simulated rotor amplitude from 18.3μm to 10.6μm online in real time,which provides technical support for the subsequent development of a new generation of bionic intelligent equipment.

关键词： Engineering self-recovery-Bionics Simulation analysis Self-recovery regulation

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Bionic Artificial Self-Recovery Enables Autonomous Health of Machine

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Journal of Bionic Engineering 2022年第6期19卷 1545-1561页

作者： gao jinji Key Laboratory of Beijing for High-End Mechanical Equipment Health Monitoring and Self-Recovery Beijing University of Chemical TechnologyBeijing100029China Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing100029China

This paper explores Engineering self-recoveries theory,which emerged from the research of Bionics to meet the great demand of modern high-risk process manufacturing and the development of aerospace *** opens a new era in which artefact s learn from natural *** the rapid development of the industrial Internet and Artificial intelligence technology,we have gained a deep understanding of the law of fault generation and development,which provides an opportunity for the emergence of Engineering self-recoveries *** self-recoveries expands the research field of Cybernetics and Engineering cybernetics,endows machines with the self-recovery mechanism,which is unique to humans and animals,and enables machines to store,supplement and activate self-recovery power to maintain body *** research on Artificial intelligence has greatly enhanced the function of imitating the human brain,but has ignored the important system and function of humans and animals to maintain their own health—the self-recovery system and self-recovery *** intelligence imitates the conscious thinking control behaviour of the human brain to realize automation and intellectualization,making machines *** self-recovery can imitate the self-recovery mechanism of human unconscious thinking,and prevent and suppress faults in operation to realize self-recovery,possibly making machines *** self-recovery technology includes self-repair,compensation,self-protection and self-recovery *** self-recoveries is the basis of the autonomous health of machines and even artificial systems,and a new research field of *** has broad application prospects in engineering.

关键词： Engineering self-recoveries Bionics Artificial self-recovery Artificial intelligence Fault self-recovery regulation

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微速差双转子信号分离方法精度研究

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流体机械 2024年第4期52卷 1-6,27页

作者：张梦潘鑫高金吉卢加乔马威龙北京化工大学发动机健康监控及网络化教育部重点实验室北京100029 北京化工大学化工安全教育部工程中心北京100029

针对提取频率相近信号特征的经典算法Zoom-FFT(ZFFT)在分离差频1 Hz以内的微速差信号时,需要足够的数据长度才能达到良好的信号分离效果的问题,为了在不增加数据长度的基础上提高信号频率分辨率,在ZFFT算法的基础上产生了ZFFT+FT算法。... 详细信息

针对提取频率相近信号特征的经典算法Zoom-FFT(ZFFT)在分离差频1 Hz以内的微速差信号时,需要足够的数据长度才能达到良好的信号分离效果的问题,为了在不增加数据长度的基础上提高信号频率分辨率,在ZFFT算法的基础上产生了ZFFT+FT算法。通过LabVIEW软件仿真试验研究了该算法对频率差1 Hz和0.5 Hz的微速差信号提取精度,并与chirp Z transform(CZT)算法、ZFFT算法以及FFT算法的提取精度作了对比,通过提取结果的相对误差及方差来衡量提取精度。在同轴微速差双转子试验台进行现场试验,利用FFT对微速差信号28 s数据集的提取结果与CZT,ZFFT及ZFFT+FT算法对4 s数据集的提取结果作对比,ZFFT+FT与FFT算法的提取结果最大相差0.56 μm,验证了ZFFT+FT的实时性和精确性。结果表明,ZFFT+FT算法能够实时精准提取频率差1 Hz以内的微速差信号。研究结果可为旋转机械微速差信号的提取提供参考。

关键词：微速差双转子 Zoom-FFT ZFFT+FT

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悬臂同轴双转子系统不平衡耦合振动抑制试验研究

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机电工程 2024年第6期41卷 1087-1094页

作者：卢加乔潘鑫高金吉张梦马威龙北京化工大学高端压缩机及系统技术全国重点实验室北京100029 北京化工大学高端机械装备健康监控与自愈化北京市重点实验室北京100029

针对悬臂同轴双转子系统不平衡耦合振动突出问题,以某开式转子发动机输出端双转子系统为研究对象,对悬臂双转子系统振动耦合机理进行了理论推导、仿真分析和试验研究。首先,采用有限元法(FEM)建立了双转子系统等效动力学模型和耦合动力... 详细信息

针对悬臂同轴双转子系统不平衡耦合振动突出问题,以某开式转子发动机输出端双转子系统为研究对象,对悬臂双转子系统振动耦合机理进行了理论推导、仿真分析和试验研究。首先,采用有限元法(FEM)建立了双转子系统等效动力学模型和耦合动力学方程,分析了悬臂同轴双转子系统耦合振动机理;然后,利用有限元软件对双转子系统进行了模态分析、临界转速分析以及不平衡响应分析,建立了自敏感系数概念以定量评价系统对不平衡振动的敏感度和耦合状态;最后,根据实际结构设计了悬臂同轴双转子实验台,进行了不同转速比下的不平衡振动抑制实验,并结合实验结果对仿真结果进行了验证。研究结果表明:模拟仿真提出的自敏感系数可作为双转子系统实际振动测点布置和不平衡振动抑制策略的理论依据;通过应用先平衡内转子后平衡外转子的不平衡振动分步抑振策略,可使双转子系统不平衡振动降幅达80%以上。该研究对双转子系统传感器测点布局和系统耦合振动抑制具有一定的指导意义。

关键词：机械振动耦合振动机理有限元方法动力学方程动力学特性稳态响应分析不平衡模态分析

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Design and experimental study of active balancing actuator driven by ultrasonic motor

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High Technology Letters 2022年第4期28卷 434-439页

作者：王洋洋 PAN Xin gao jinji WU Haiqi Beijing Key Laboratory of Health Monitoring and Selfrecovery for Highend Mechanical Equipment Beijing University of Chemical TechnologyBeijing 100029P.R.China Key Laboratory of Engine Health MonitoringControl and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing 100029P.R.China

The on-line active balancing system can suppress the vibration caused by unbalance of rotating equipment in real time,and is of great strategic significance for high-end equipment in machining,aviation and other *** the core equipment of the on-line active balancing system,the performance parameters of the active balancing actuator determine the overall performance of the balancing *** balancing method of the existing mechanical balancing actuator is improved,and a new active balancing actuator structure based on ultrasonic motor is *** stress distribution of the actuator is analyzed by establishing a three-dimensional model of the *** feasibility and effectiveness of the above structure are verified by the experimental research on the *** results show that the active balancing actuator based on ultrasonic motor can drive the counterweight to complete the required self-locking and stepping actions in the whole *** structural design scheme is *** the same time,it also shows that the actuator can suppress the unbalance vibration of the *** active balancing actuator based on ultrasonic motor drive studied in this paper lays a foundation for the industrial application of this kind of actuator in the future.

关键词： active balancing unbalance vibration control ultrasonic motor

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Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding machine spindles

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Frontiers of Mechanical Engineering 2023年第3期18卷 203-217页

作者： Xin PAN Haoyu ZHANG jinji gao Congcong XU Dongya LI Beijing Key Laboratory of Health Monitoring and Self-recovery for High-end Mechanical Equipment Beijing University of Chemical TechnologyBeijing 100029China Luoyang Bearing Research Institute Corporation Luoyang 471033China

Modern rotating machines,which are represented by high-end grinding machines,have developed toward high precision,intelligence,and high durability in recent *** the core components of grinding machine spindles,grinding wheels greatly affect the vibration level during *** unbalance vibration self-recovery regulation(UVSRR)system is proposed to suppress the vibration of grinding wheels during workpiece processing,eliminating or minimizing the ***,technical principles and the system composition are ***,the balancing actuator in the UVSRR system is analyzed in *** advanced nature of the improved structure is presented through structure introduction and advantage *** performance of the balancing actuator is mutually verified by the theoretical calculation of torque and software *** show that the self-locking torque satisfies the actual demand,and the driving torque is increased by 1.73 times compared with the traditional ***,the engineering application value of the UVSRR system is verified by laboratory performance comparison and actual factory *** balancing speed and effect of the UVSRR system are better than those of an international mainstream product and,the quality of the workpieces machined in the factory improved by 40%.

关键词： SUVSRRR system radial electromagnetic type vibration suppression performance simulation engineering application

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Method to deploy wireless relays in industrial wireless monitoring

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高技术通讯：英文版 2014年第2期20卷 161-165页

作者：翁浩 gao jinji Diagnosis and Self-Recovery Engineering Research Center University of Chemical Technology

In light of demands for wireless monitoring and the characteristics of wireless channel,a complete deployment method containing channel survey,path loss estimation,and gradient grade of wireless relay nodes is *** can be proved by experiments that under the premise of meeting the requirements of real-time and redundant-topology,the total number of relay nodes could be minimized by using the proposed method.

关键词：无线中继无线监控部署工业无线通道信道测量路径损耗余拓扑

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Experimental Investigation on Vibration Control of Rotor-bearing System with Active Magnetic Exciter

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Chinese Journal of Mechanical Engineering 2011年第6期24卷 1013-1021页

作者： WANG Weimin gao jinji HUANG Liquan XIN Zhengqiu Diagnosis and Self-recovery Engineering Research Center Beijing University of Chemical TechnologyBeijing 100029China

Vibration control is an efficient way to minimize a rotating machine’s vibration level so that its vibration fault-free can be ***,several factors,such as unbalance,misalignment and instability,contribute to the serious vibration of rotating *** is necessary that one apparatus can depress vibration caused by two or more *** fault self-recovery(FSR) mechanism is introduced and *** of vibration control are investigated theoretically using numerical method *** magneticelectric exciter(AME) are selected as the actuator of a FSR device because it can provide suitable force by varying the control current in the exciters depending upon a proportional and derivative control *** numerical study,it is indicate that only a small control force is needed to improve stability margins of the compressor and prevent subsynchronous vibration fault *** synchronous vibration,three control strategies,searching in whole circle,fast optimizing control(FOC),and none mistaking control,are investigated to show which of the control strategy can realize the fault self-recovery in the shortest *** study is conducted on a test rig with variable rotating *** of the test indicate that the non-mistake control strategy can minimize synchronous vibration in less than three *** proposed research can provide a new insight for subsynchronous and synchronous vibration restraining about centrifugal compressor.

关键词： vibration control rotor-bearing system active magnetic exciter subsynchronous

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A method to compress vibration signals using wavelet packet transformation combined with sub-band vector quantization

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High Technology Letters 2013年第4期19卷 443-448页

作者：翁浩 gao jinji Jiang Zhinong Diagnosis and Self-recovery Engineering Research Center Beijing University of Chemical Technology

A novel compression method for mechanical vibrating signals,binding with sub-band vector quantization(SVQ) by wavelet packet transformation(WPT) and discrete cosine transformation(DCT) is ***,the vibrating signal is decomposed into sub-bands by *** DCT and adaptive bit allocation are done per sub-band and SVQ is performed in each *** is noted that,after DCT,we only need to code the first components whose numbers are determined by the bits allocated to that *** an actual signal,our algorithm is proven to improve the signal-to-noise ratio(SNR) of the reconstructed signal effectively,especially in the situation of lowrate transmission.

关键词：机械振动信号小波包变换矢量量化压缩方法子带 DCT变换自适应比特分配离散余弦变换

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A Review on Self-Recovery Regulation(SR)Technique for Unbalance Vibration of High-End Equipment

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Chinese Journal of Mechanical Engineering 2020年第6期33卷 1-23页

作者： Xin Pan Jiaqiao Lu Jiaji Huo jinji gao Haiqi Wu Beijing Key Laboratory of Health Monitoring and Self-recovery for High-end Mechanical Equipment Beijing University of Chemical TechnologyBeijing100029China Key Laboratory of Engine Health Monitoring-Control and Networking(Ministry of Education) Beijing University of Chemical TechnologyBeijing100029China

The high-end equipment represented by high-end machine tools and aero-engines is the core component of the national intelligent manufacturing plan,and the mass unbalance is the main reason for its excessive vibration,that seriously impacts the operation efficiency and running life of the *** order to change the traditional way that the fault of equipment can only be repaired by human,the self-recovery mechanism of human and animal are given to the equipment in this paper,which forms the self-recovery regulation(SR)system for unbalance vibration of high-end *** system can online generate the self-recovery force to restrain the unbalance vibration of the equipment in operation,which is an important direction for the development of the equipment to the advanced intelligent *** on the basic principles of SR technique,the typical engineering application cases of this technique in the field of aeroengine and high-end machine tools are introduced,and four related studies promoting the development of this technique are summarized and analyzed in *** includes feature extraction,imbalance location,regulation method and balancing ***-recovery Regulation(SR)Technique is an important way to realize intelligent manufacturing and intelligent *** research can lay a technical foundation for the development of high-end equipment with self-health function.

关键词： Unbalance vibration Self-recovery regulation Active balancing High-end equipment Self-health

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