公开(公告)号：US20170044928A1

公开(公告)日：2017-02-16

申请号：US15304238

申请日：2014-12-26

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Jiubin TAN ,  Jingzhi HUANG ,  Wei GU ,  Zhongpu WEN

IPC: F01D21/00 ,  G01B21/00

CPC classification number: F01D21/003 ,  B25B27/00 ,  F01D25/285 ,  F05D2220/323 ,  F05D2240/10 ,  F05D2240/24 ,  F05D2250/35 ,  F05D2260/83 ,  G01B21/00 ,  Y02T50/671

Abstract: A five-degree-of-freedom adjustment and positioning method and apparatus for assembly/measurement of rotor and stator of an aircraft engine; said method comprises adjusting a plane motion and a rotation of a tested piece through composite motion comprising five degrees of freedom: a 360° rotatory motion around a Z axis, a plane motion along an X axis and a plane motion along a Y axis, a rotatory motion around the X axis and a rotatory motion around the Y axis; said apparatus comprises: a clamping mechanism (1), a turning platform component (A), a translational platform component (B) and a rotational platform component (C). The present invention designs a five-degree-of-freedom adjustment and positioning method and apparatus having properties of large load bearing, high precision and high stiffness, thus improving assembly efficiency and measurement accuracy of the aircraft engine.

Abstract translation: 一种用于飞机发动机转子和定子的装配/测量的五自由度调节和定位方法和装置; 所述方法包括通过包括五个自由度的复合运动调整被测件的平面运动和旋转：围绕Z轴的360°旋转运动，沿X轴的平面运动和沿着Y轴的平面运动， 围绕X轴的旋转运动和围绕Y轴的旋转运动; 所述装置包括：夹紧机构（1），转动平台部件（A），平移平台部件（B）和旋转平台部件（C）。 本发明设计一种具有承载力大，精度高，刚度高等特点的五自由度调节定位方法和装置，提高飞机发动机的组装效率和测量精度。

公开(公告)号：US20240202394A1

公开(公告)日：2024-06-20

申请号：US18450421

申请日：2023-08-16

Applicant: Harbin Institute of Technology

Inventor： Yang LIU ,  Zhenyu CHEN ,  Fazhi SONG ,  Jiubin TAN

IPC: G06F30/20

CPC classification number: G06F30/20 ,  G06F2111/10

Abstract: A method for dynamic output force distribution of a multi-degree-of-freedom over-actuated motion stage includes: establishing a mathematical model G(s) of a motion stage based on a modal representation; setting a time delay interval parameter Δτ and an instruction shaper order nCS, and calculating each pulse time delay parameter τi; calculating matrices Tb and Vb; initializing q=1; defining Hq; calculating intermediate variable {tilde over (T)}jq, {tilde over (V)}, ΦHq, YHq, TΦHq, VΦHq, and βq; calculating an estimated value Ĥq of Hq; obtaining an amplitude Aikq of an instruction shaper; q=q+1, until calculation is completed for all logical axis channels; calculating α(s) by using Aikq; and obtaining a dynamic output force distribution matrix Tf(s). Zero-residue vibration suppression in all controllable flexible modalities can be realized with finite actuator redundancies.

公开(公告)号：US20230409920A1

公开(公告)日：2023-12-21

申请号：US17875453

申请日：2022-07-28

Applicant: Harbin Institute of Technology

Inventor： Chuanzhi SUN ,  Qing LU ,  Yongmeng LIU ,  Jiubin TAN

IPC: G06N3/08

CPC classification number: G06N3/086 ,  G06N3/084

Abstract: A GA-PSO-BP neural network is provided for performing a measurement of a coaxiality error of parts of a rotary equipment and predicting a coaxiality of parts of the rotary equipment in order to solve a problem that a coaxiality error of saddle surface parts is difficult to calculate by building a traditional mathematical model based on a three-dimensional coordinate system transformation due to serious deformation of fitting surfaces of spigots. The GA-PSO-BP neural network method includes the steps of analyzing an influence source of the coaxiality error of multi-stage parts after assembly; then taking an error source as an input and the coaxiality error of the multi-stage parts after assembly as an output; and introducing a genetic algorithm to optimize an initial weight and threshold of a BP neural network, and introducing a particle swarm optimization to find optimal solutions of hyperparameters.

公开(公告)号：US20230061358A1

公开(公告)日：2023-03-02

申请号：US17706343

申请日：2022-03-28

Applicant: Harbin Institute of Technology

Inventor： Hongxing YANG ,  Ziqi YIN ,  Pengcheng HU ,  Jiubin TAN

IPC: G01B9/02001 ,  G02B27/28 ,  G02B5/30 ,  G02F1/11

Abstract: The present disclosure provides a multi-frequency hybrid heterodyne laser tracker system based on a single light source. According to the laser tracking system proposed in the present disclosure, multi-frequency laser is obtained by conducting multi-acousto-optic frequency shift on a dual-longitudinal-mode laser unit, and an absolute ranging precision gauge is constructed by using a dual-longitudinal-mode interval of a light source. With the frequency shift difference of a multi-acousto-optic frequency shifter, an absolute ranging roughness gauge is constructed, and the relative displacement measurement of dual-frequency light interference is achieved. Meanwhile, by utilizing the reflection of multiple reflectors and light splitting and combining of polarization prisms, synchronous measurement of multi-wavelength absolute distance, relative displacement and PSD position is achieved, resolving the problem that an existing laser tracker uses multiple light sources, which leads to difference in measurement datum, and consequently to the difficultly in traceback.

公开(公告)号：US20210044220A1

公开(公告)日：2021-02-11

申请号：US17079432

申请日：2020-10-24

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Weijia SHI ,  Xuyang YU ,  Bo ZHAO ,  Jiubin TAN

IPC: H02N2/14 ,  H02N2/00

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.

公开(公告)号：US20170363417A1

公开(公告)日：2017-12-21

申请号：US15555028

申请日：2016-03-04

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Jiwen CUI ,  Shiyuan ZHAO ,  Kunpeng FENG ,  Hong DANG ,  Junying LI ,  Jiubin TAN

IPC: G01B11/00 ,  G02B6/02 ,  H01S3/16 ,  H01S3/067

CPC classification number: G01B11/007 ,  G01B5/012 ,  G01B11/18 ,  G02B6/02042 ,  H01S3/06791 ,  H01S3/1608

Abstract: A method and equipment for dimensional measurement of a micro part based on fiber laser with multi-core fiber Bragg grating probe are provided, wherein a multi-core FBG probe with FBGs (12,29) inscribed in the core or cores out of the center of the multi-core fiber is used to transform the two-dimensional or three-dimensional contact displacement into the spectrum shifts with a high sensitivity. At the meantime, the FBGs in the multi-core FBG probe (12,29) work as the wavelength selection device of the fiber laser, the wavelength of the fiber laser will change thereby. So the contact displacement is finally converted into the wavelength change of the fiber laser. The method and equipment have the advantage of high sensitivity, low probing force, compact structure, high inspecting aspect ratio and immunity to environment interference.

公开(公告)号：US20170055380A1

公开(公告)日：2017-02-23

申请号：US15118815

申请日：2014-12-16

Applicant: HARBIN INSTITUTE OF TECHNOLOGY

Inventor： Zhengang LU ,  Jiubin TAN

IPC: H05K9/00

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.

Abstract translation: 基于具有三角形和正交混合分布的环阵列和子环的光学窗口适用于电磁屏蔽。 该阵列具有与根据等边三角形和二维正交正方形混合布置紧密排列的基本环的相同直径的金属环，并被装载在光学透明基板表面上。 相邻的基本环相切地从外部连接。 金属子环布置在每个基本环内并与内部相切地连接。 每个基本环及其子环构成基本单位。 在环的切向连接位置，电线重叠或金属被提供以确保连接的环之间可靠的电连接，因此所有的环是导电的。 金属栅格结构显着降低栅格高阶衍射光强分布的不均匀性，从而使由衍射引起的杂散光分布更均匀，成像受影响较小。

公开(公告)号：US20240133844A1

公开(公告)日：2024-04-25

申请号：US18115790

申请日：2023-03-01

Applicant: Harbin Institute of Technology

Inventor： Bingquan WANG ,  Jiubin TAN ,  Bo ZHAO ,  Weijia SHI

IPC: G01N29/04 ,  G01L1/25 ,  G01N29/07

CPC classification number: G01N29/041 ,  G01L1/255 ,  G01N29/07

Abstract: An air-coupled ultrasonic plane stress detection method for a composite material based on dual-modal sound-time ratios of a Lamb wave includes: S1: assembling a detection device; S2: based on the detection device and the dual-modal sound-time ratios of the Lamb wave in S1, using unidirectionally loaded stress to obtain different stress coefficient relations; S3: based on the stress coefficient relations in S2, solving stress coefficients; S4: based on the stress coefficients in S3, acquiring three sound-time ratios; S5: based on the sound-time ratios in S4, describing a stress state of a detection point; and S6: repeating S4 and S5 till completing detection and scanning. The method improves the accuracy of stress coefficient calibration and air-coupled ultrasonic stress representation of a composite material panel greatly.

公开(公告)号：US20210203121A1

公开(公告)日：2021-07-01

申请号：US17022343

申请日：2020-09-16

Applicant: Harbin Institute of Technology

Inventor： Hongxing YANG ,  Yun ZOU ,  Ziqi YIN ,  Jing LI ,  Pengcheng HU ,  Jiubin TAN

IPC: H01S3/131 ,  G01K1/02 ,  H05B1/02 ,  H01S3/13

Abstract: The disclosure provides a high-frequency-reproducibility laser frequency stabilization method and device based on multi-point acquisition of laser tube temperature. The laser frequency stabilization device includes: a frequency stabilization control circuit. The frequency stabilization control circuit includes a polarizing beam splitter, an optical power conversion circuit, an A/D conversion circuit, a temperature measuring circuit, a microprocessor, a D/A converter and a heating film driver. The polarizing beam splitter is disposed outside any one of laser transmitting holes. The optical power conversion circuit is disposed on reflection and refraction optical paths of the polarizing beam splitter. The optical power conversion circuit, the A/D conversion circuit, the microprocessor, the D/A converter, the heating film driver and a plurality of groups of heating films are sequentially in one-way connection. Temperature sensors, the temperature measuring circuit and the microprocessor are sequentially in one-way connection. The method of the disclosure can increase the frequency reproducibility of a laser device from 10−8 to 10−9. The device of the disclosure can effectively avoid the drift of a final frequency stabilization temperature point.

公开(公告)号：US20200217739A1

公开(公告)日：2020-07-09

申请号：US16375089

申请日：2019-04-04

Applicant: Harbin Institute of Technology

Inventor： Yongmeng LIU ,  Chuanzhi SUN ,  Jiubin TAN

IPC: G01M1/24 ,  G01M1/20 ,  G06N3/08 ,  G06N3/04 ,  G06F17/16 ,  F01D25/28

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.