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公开(公告)号：US12124228B1
公开(公告)日：2024-10-22
申请号：US18731174
申请日：2024-05-31
Applicant: Harbin Institute of Technology
Inventor： Fazhi Song , Kaixin Liu , Shuaiqi Chen , Yang Liu , Jiubin Tan
CPC classification number: G05B13/0265 , G05B19/19 , G05B2219/34048 , G05B2219/41439 , G05B2219/41453
Abstract: A learning control system for a nano-precision motion stage comprises a closed-loop feedback section including a motion trajectory generator, a feedback controller, a motion stage, and a first Fourier transformer; and a feedforward section including a second Fourier transformer, a learning controller, an iteration backward shift operator, and a Fourier inverse transformer. An iteration experiment count j is initialized as j=1, and a j-th frequency domain feedforward signal is initialized to 0; the system is run to collect a frequency domain error signal and a frequency domain position measurement signal; a (j+1)-th frequency domain feedforward signal is updated; and an iteration experiment count j is incremented by 1. The present disclosure can effectively suppress the influence of external noise and disturbances, and improve convergence performance. Moreover, the present disclosure requires less computation, achieves simple determination of learning gains and strong robustness, and is convenient for engineering applications.
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公开(公告)号：US11709152B2
公开(公告)日：2023-07-25
申请号：US17552467
申请日：2021-12-16
Applicant: Harbin Institute of Technology
Inventor： Weijia Shi , Jiaxin Li , Bo Zhao , Jiubin Tan
CPC classification number: G01N29/26 , G01B17/00 , G01N29/07 , G01N2291/011 , G01N2291/023 , G01N2291/02827 , G01N2291/101
Abstract: Disclosed are a linkage device, a transceiver module and a plane stress field measuring device and method capable of achieving synchronous adjustment of distance and angle, and relates to the field of ultrasonic non-destructive testing. The existing technical means for measuring plane stress in the field of ultrasonic testing has the shortcomings that the same testing is only applicable for single materials and the deflection angles of transmitting and receiving transducers are inconsistent. In the application, the linkage device designed by comprising a distance adjusting screw, an angle adjusting screw, a left connecting rod, a right connecting rod, a shaft column and a column lock is adopted, and based on the linkage device, the transceiver module designed by comprising a receiving end wedge, a receiving probe, a transmitting end wedge and a transmitting probe is additionally arranged; based on the transceiver module, the measuring device designed by comprising a pulse transmitting device, an amplifying device and a data acquisition device is additionally arranged, and the stress measuring method applicable for the stress measuring device is provided; and the distance and deflection angle between the receiving probe and the transmitting probe of the detection are adjusted according to a tested part. The application applies to stress measurement in the manufacturing process of mechanical components.
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公开(公告)号：US20230228632A1
公开(公告)日：2023-07-20
申请号：US17704090
申请日：2022-03-25
Applicant: Harbin Institute of Technology
Inventor： Weijia Shi , Bo Zhao , Jiubin Tan
Abstract: The disclosure provides a method, system, device and medium for online monitoring of a plane stress field without baseline data based on a piezoelectric transducer array. Since Lamb waves have complex multi-mode characteristics, a suitable excitation frequency needs to be selected according to geometric dimensions of the structure to be measured, and then, only low-order mode Lamb waves are excited inside the measured structure to avoid serious waveform aliasing. For isotropic measured objects, anisotropic characteristics will be generated under the action of pre-stresses, that is, the propagation velocities of ultrasonic waves in all directions are different, but there is a linear relationship between velocity changes in different propagation directions and stresses. Therefore, there is still a linear relationship between the difference of velocity changes in different propagation directions and the stress. According to this characteristic, a characterization method of an absolute stress field without baseline data can be implemented. The method of the disclosure can make full use of the low attenuation characteristics of the Lamb waves to realize online monitoring of the plane stress field with a large coverage area.
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公开(公告)号：US20230120241A1
公开(公告)日：2023-04-20
申请号：US17552467
申请日：2021-12-16
Applicant: Harbin Institute of Technology
Inventor： Weijia Shi , Jiaxin Li , Bo Zhao , Jiubin Tan
Abstract: Disclosed are a linkage device, a transceiver module and a plane stress field measuring device and method capable of achieving synchronous adjustment of distance and angle, and relates to the field of ultrasonic non-destructive testing. The existing technical means for measuring plane stress in the field of ultrasonic testing has the shortcomings that the same testing is only applicable for single materials and the deflection angles of transmitting and receiving transducers are inconsistent. In the application, the linkage device designed by comprising a distance adjusting screw, an angle adjusting screw, a left connecting rod, a right connecting rod, a shaft column and a column lock is adopted, and based on the linkage device, the transceiver module designed by comprising a receiving end wedge, a receiving probe, a transmitting end wedge and a transmitting probe is additionally arranged; based on the transceiver module, the measuring device designed by comprising a pulse transmitting device, an amplifying device and a data acquisition device is additionally arranged, and the stress measuring method applicable for the stress measuring device is provided; and the distance and deflection angle between the receiving probe and the transmitting probe of the detection are adjusted according to a tested part. The application applies to stress measurement in the manufacturing process of mechanical components.
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公开(公告)号：US11539309B2
公开(公告)日：2022-12-27
申请号：US17079432
申请日：2020-10-24
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Weijia Shi , Xuyang Yu , Bo Zhao , Jiubin Tan
Abstract: A zero-voltage zero-current soft switching type driving method for an ultrasonic motor is provided, relating to the technical field of driving of a two-phase actuator. The disclosure solves the problems of high loss, high heat amount and the like in a traditional ultrasonic motor driving circuit. The method provided realizes resonance between series inductors and buffer capacitors by means of an optimal design of the inductance of matching inductors, the capacitance of buffer capacitors, a dead time value and a delay time value, thereby causing a power tube to realize zero-voltage and zero-current switching. Two signal input ends of a two-phase pseudo full bridge inverter are connected to a power grid, and two signal output ends of the two-phase pseudo full bridge inverter are respectively connected to two signal input ends of a matching circuit; and the output ends of the matching circuit are respectively connected to a two-phase ultrasonic motor.
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Patent Agency Ranking
公开(公告)号：US10794790B2
公开(公告)日：2020-10-06
申请号：US16375089
申请日：2019-04-04
Applicant: Harbin Institute of Technology
Inventor： Yongmeng Liu , Chuanzhi Sun , Jiubin Tan
Abstract: The present invention provides a large-scale high-speed rotary equipment measuring and neural network learning regulation and control method and device based on rigidity vector space projection maximization, belonging to the technical field of mechanical assembly. The method utilizes an envelope filter principle, a two-dimensional point set S, a least square method and a learning neural network to realize large-scale high-speed rotary equipment measuring and regulation and control. The device comprises a base, an air flotation shaft system, an aligning and tilt regulating workbench, precise force sensors, a static balance measuring platform, a left upright column, a right upright column, a left lower transverse measuring rod, a left lower telescopic inductive sensor, a left upper transverse measuring rod, a left upper telescopic inductive sensor, a right lower transverse measuring rod, a right lower lever type inductive sensor, a right upper transverse measuring rod and a right upper lever type inductive sensor. The method and the device can perform effective measuring and accurate regulation and control on large-scale high-speed rotary equipment.
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公开(公告)号：US09724791B2
公开(公告)日：2017-08-08
申请号：US15118803
申请日：2014-12-26
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Bo Zhao , Lei Wang , Jiubin Tan , Chuanzhi Sun
CPC classification number: B23P15/04 , F01D5/005 , F01D5/02 , F01D5/027 , F01D5/26 , F01D25/285 , F05D2220/323 , F05D2230/64 , F05D2250/31 , G01B5/205 , G01B5/207
Abstract: Aircraft engine rotors traditionally have low coaxiality after assembly. This is solved by the methods and devices described herein, having advantages that the rotors have high coaxiality after assembly, reduced vibration, easy installation, high flexibility, and improved engine performance. A measurement method and device use an air flotation rotary shaft system determining a rotary reference. An induction synchronizer determines angular positioning of a turntable. Using a four probe measurement device, a radial error of a rotor radial assembly surface and an inclination error of an axial mounting surface are extracted and an influence weight value of the rotor on the coaxiality of assembled rotors is obtained. All rotors required for assembly are measured and an influence weight value of each on the coaxiality of the assembled rotors is obtained. Vector optimization is performed on the weight value of each rotor and an assembly angle of each rotor is obtained.
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公开(公告)号：US09668391B2
公开(公告)日：2017-05-30
申请号：US15118815
申请日：2014-12-16
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Zhengang Lu , Jiubin Tan
CPC classification number: H05K9/0094 , G02B5/18 , G02B5/1866 , G02B27/0018 , G02B27/46 , G02B2207/121 , H05K9/0086
Abstract: An optical window based on an array of rings and sub-rings having a triangular and orthogonal mixed distribution is suited for electromagnetic shielding. The array has metal rings of the same diameter acting as basic rings closely arranged according to an equilateral triangular and two-dimensional orthogonal square mixed arrangement and is loaded on an optical window transparent substrate surface. Adjacent basic rings are connected externally tangentially. Metal sub-rings are arranged within each basic ring and connected thereto internally tangentially. Each basic ring and its sub-rings constitute a basic unit. At tangential connection locations of the rings, wires overlap or metal is provided to ensure reliable electrical connections between connected rings, thus all rings are conductive. The metal grid structure significantly reduces non-uniformity of grid high-order diffracted light intensity distribution, thereby causing stray light distribution caused by diffraction to be more uniform and imaging to be less affected.
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9.发明授权公开(公告)号：US09423000B2
公开(公告)日：2016-08-23
申请号：US14421610
申请日：2014-02-19
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiubin Tan , Junning Cui , Lei Wang
IPC: F16M13/00 , F16F15/03 , F16F15/023 , F16F15/00 , G01D5/20 , G01L19/00 , H02K41/035
CPC classification number: F16F15/03 , F16F15/002 , F16F15/0232 , G01D5/20 , G01L19/0061 , H02K41/0356
Abstract: A magnetically suspended vibration isolator with zero stiffness whose angle degree of freedom is decoupled with a joint ball bearing has a main body, in which a sleeve and a lower mounting plate are supported with a magnetically suspended thrust bearing, a piston cylinder and the sleeve are lubricated and supported with a cylinder air bearing surface, and the angle degree of freedom between a upper mounting plate and the lower mounting plate is decoupled with a joint ball bearing; a position close-loop control system comprising voice coil motors, displacement sensors, limit switches, a controller and a driver is introduced, and the relative position between the upper mounting plate and the lower mounting plate is precisely controlled.
Abstract translation: 具有零刚度的磁悬浮隔振器，其角度自由度用接头球轴承解耦具有主体，其中套筒和下安装板由磁悬浮推力轴承，活塞气缸和套筒支撑 通过气缸空气轴承表面进行润滑和支撑，上安装板和下安装板之间的角度自由度用接头球轴承分离; 引入了包括音圈电机，位移传感器，限位开关，控制器和驱动器的位置闭环控制系统，并且精确地控制了上安装板和下安装板之间的相对位置。
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10.发明授权Translation mirror based beam steering mechanism with ultrahigh frequency response and high sensitivity 有权具有超高频响应和高灵敏度的平移镜基光束转向机构公开(公告)号：US09383574B2
公开(公告)日：2016-07-05
申请号：US13980036
申请日：2012-09-28
Applicant: Harbin Institute of Technology
Inventor： Jiubin Tan , Fan Zhu , Jiwen Cui
CPC classification number: G02B26/0816 , G01S7/4817 , G01S17/42 , G02B26/0858 , G02B26/101 , H01S3/0071
Abstract: This invention relates to a beam steering mechanism with ultrahigh frequency response and high sensitivity, which is based on the translation of two mirrors. Beam steering is achieved by the translations of two mirrors in the X axial mirror group and Y axial mirror group. The two translation mirrors are located at the output ends of two PZT actuators, and are directly actuated by the two PZT actuators. The dynamic characteristics of the two translation mirrors are always exactly the same as the output characteristics of the PZT actuators. There is no mechanical translation loss in this beam steering mechanism, and so, the beam steering mechanism has an ultrahigh frequency response and high angular deflection sensitivity.
Abstract translation: 本发明涉及一种具有超高频响应和高灵敏度的光束转向机构，其基于两个反射镜的平移。 光束转向通过X轴反射镜组和Y轴反射镜组中的两个反射镜的平移来实现。 两个平移反射镜位于两个PZT执行器的输出端，并由两个PZT执行器直接驱动。 两个平移反射镜的动态特性总是与PZT执行器的输出特性完全相同。 在该光束转向机构中没有机械平移损耗，因此，光束转向机构具有超高频响应和高角度偏转灵敏度。
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