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公开(公告)号：US20210041403A1
公开(公告)日：2021-02-11
申请号：US17079427
申请日：2020-10-24
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Weijia SHI , Bingquan WANG , Bo ZHAO , Jiubin TAN
IPC: G01N29/26
Abstract: An ultrasonic phased array transducer device with a two-dimensional hinge array structure belongs to equipment in the technical field of ultrasonic detection. A connecting rod is fixedly connected to a fixed support and a two-dimensional hinge array respectively. Voice coil motors are symmetrically arranged in a shape of the British “Union Jack” with the connecting rod as a center, and are fixedly connected to the fixed support. Force output rods are respectively connected to voice coil motor coils and the upper surfaces of array units. Piezoelectric array elements are fixedly connected to the lower surfaces of all the array units. The numbers of the voice coil motors and the force output rods are 2N (N=4, 8, 12, 16, 20), the number of the piezoelectric array elements is 2N+1, and different N values are selected according to the sizes of workpieces to be detected. In the disclosure, by adjusting the current of each voice coil motor coil, the corresponding force output rod generates displacement to drive the two-dimensional hinge array unit to generate displacement, so as to push out and retract the hinge array unit and the piezoelectric array element fixedly connected below and drive the two-dimensional hinge array to generate deformation, so that the piezoelectric array elements fully fit with the surface of the workpiece to be detected. The disclosure can be applied to detection of the workpieces to be detected with flat surfaces, curved surfaces or spherical surfaces.
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2.发明申请公开(公告)号：US20210042454A1
公开(公告)日：2021-02-11
申请号：US17079428
申请日：2020-10-24
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Bo ZHAO , Xue QI , Weijia SHI , Jiubin TAN
Abstract: The disclosure provides a linearization identification method for a hysteresis model of piezoceramics based on Koopman operators, and belongs to the field of precision positioning. In order to solve the problem of hysteresis of a piezoelectric actuator in practical application, the disclosure further provides the linearization identification method for the hysteresis model of the piezoceramics based on Koopman operators. The method of the disclosure includes: Step I, building a structure of the hysteresis model of the piezoceramics; Step II, determining parameters of the hysteresis model of the piezoceramics; Step III, obtaining a great amount of simulation data by using simulation software; Step IV, performing deep learning training based on Koopman operators; and Step V, determining a linearization model for the hysteresis model of the piezoceramics based on Koopman operators. The disclosure is applicable to piezoelectric actuator control and precision positioning.
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公开(公告)号：US20200217223A1
公开(公告)日：2020-07-09
申请号：US16375204
申请日：2019-04-04
Applicant: Harbin Institute of Technology
Inventor： Jiubin TAN , Chuanzhi SUN , Yongmeng LIU
Abstract: The present invention provides a method for distributing relative gap parameters of large-scale high-speed rotary equipment components based on eccentricity vector following measurement and adjustment. According to the present invention, a propagation process of location and orientation errors of rotors and stators of an aero-engine during assembly are analyzed, a propagation relationship of eccentricity errors after n-stage rotor and stator assembly is determined, and a coaxiality prediction model after multi-stage rotor and stator assembly is obtained; and the relative concentricity and relative runout of the rotors and stators can be further obtained by using an offset of the rotors and stators, thereby implementing the calculation of a relative gap; thereafter, a dual-objective optimization model for multi-stage rotor and stator coaxiality and relative gap amount based on an angular orientation mounting position of all stages of rotors and stators is established, the angular orientation mounting position of all stages of rotors and stators is optimized by using a genetic algorithm, to obtain an optimal mounting phase of all stages of rotors and stators; and finally, relative gap parameters of the rotor and stator can be distributed by using a probability density method.
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4.发明申请公开(公告)号：US20170167866A1
公开(公告)日：2017-06-15
申请号：US15118312
申请日：2014-12-26
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Lei WANG , Bo ZHAO , Jiubin TAN , Chuanzhi SUN
CPC classification number: G01B21/24 , F01D5/02 , F01D5/027 , F01D5/30 , F01D25/285 , G01B7/30 , G01B7/312 , G01B9/02 , G01B21/02 , G01M15/02
Abstract: An aero engine rotor assembling method and device based on concentricity and verticality measurement belongs to mechanical assembly technology. The present invention effectively solves the problem of poor coaxality after the aero engine rotor is assembled and has the characteristics of high coaxality after the rotor is assembled, reduced vibration, mounting easiness, high flexibility and improved engine performance. The measurement and device is: determining rotary reference based on an air bearing rotary; determining the angular positioning of a rotary table according to a photoelectric encoder; extracting the radial error of the radial mounting plane and the inclination error of the axial mounting plane of the rotor based on the four-probe measuring device to obtain the influencing weight of this rotor to the assembled rotor on coaxality; measuring respectively all the rotors required for assembling to obtain the influencing weight of each rotor to the assembled rotor on coaxality; vector optimizing the weight of each rotor to obtain the assembling angle of each rotor.
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公开(公告)号：US20170050275A1
公开(公告)日：2017-02-23
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.
Abstract translation: 飞机发动机转子在组装后传统上具有低同轴度。 这通过本文所述的方法和装置来解决，其优点在于转子在组装之后具有高的同轴度，减少的振动，易于安装，高灵活性和改进的发动机性能。 测量方法和装置使用确定旋转参考的空气浮选旋转轴系统。 感应同步器确定转台的角度定位。 使用四探头测量装置，提取转子径向组件表面的径向误差和轴向安装表面的倾斜误差，并且获得转子对组装转子同轴度的影响重量值。 测量组装所需的所有转子，并且获得各组合转子的同轴度的影响重量值。 对每个转子的重量值执行向量优化，并获得每个转子的组装角度。
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Patent Agency Ranking
公开(公告)号：US20220090907A1
公开(公告)日：2022-03-24
申请号：US17417925
申请日：2019-04-18
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Pengcheng HU , Di CHANG , Jiubin TAN
IPC: G01B9/02
Abstract: Present disclosure relates to a heterodyne grating interferometric method and system for two-degree-of-freedom with high tolerance. The system comprises a separately modulated heterodyne laser (1), an optical prism (23) and a photoelectric detection and signal processing unit (4). The separately modulated heterodyne laser (1) simultaneously outputs two laser beams at different frequencies, which are incident in parallel to a first beamsplitting surface so as to be split, and then a part thereof is incident to a retro-reflector (233) to produce reference beams (53a, 53b), which are incident to a third beamsplitting surface, and the other part traverses a double-diffraction structure formed by a measured grating (3) and retro-reflectors (234a, 234b) to obtain two measured beams (59a, 59b), which are incident to a second beamsplitting surface and then are divided into two parts. Wherein one part is converged to form a first interference beam (61), and the other part is incident to the third beamsplitting surface and is converged with the corresponding reference beams (53a, 53b) to form second and third interference beams (62, 63). Photoelectric detection and signal processing is performed on the interference signals of the three interference beams (61, 62, 63), so as to calculate horizontal and vertical displacement of the grating (3). The present measurement method and system improve the angular tolerance of tip and tilt of the optical grating (3) while increasing the fold factors.
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公开(公告)号：US20210041404A1
公开(公告)日：2021-02-11
申请号：US17079430
申请日：2020-10-24
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Bo ZHAO , Jiaxin LI , Weijia SHI , Jiubin TAN
Abstract: The disclosure relates to a control method of a probe with ultrasonic phased array transducers in a hinge array, and belongs to the technical field of ultrasonic detecting. The control method includes the steps: firstly, fixing a part under test, making a central piezoelectric array element of piezoelectric array elements for the ultrasonic phased array transducers in the hinge array make contact with a surface of the part under test, and then fixing a fixed support; before detection is started, driving the hinge array through voice coil motors to make the piezoelectric array elements completely fit the surface of the part under test, wherein the number of the piezoelectric array elements is 2N+1 (N=1, 2, 3, 4 and 5), and different values of N are selected according to a size of the part under test; with the value of pressure of the central piezoelectric array element as a standard and difference values between values of pressures of other piezoelectric array elements and the value of pressure of the central piezoelectric array element as control signals of respective corresponding voice coil motor coils, controlling output rods to drive the hinge array; keeping the values of pressures of all the piezoelectric array elements consistent by means of an incremental digital PID control method; and then realizing deflecting and focusing of ultrasonic waves by means of a time delay rule for ultrasonic detecting, thereby detecting parts under test with planar or curved surfaces.
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公开(公告)号：US20200217738A1
公开(公告)日：2020-07-09
申请号：US16374926
申请日：2019-04-04
Applicant: Harbin Institute of Technology
Inventor： Yongmeng LIU , Jiubin TAN , Chuanzhi SUN
Abstract: The present invention provides a stage-by-stage measurement, regulation and distribution method for dynamic characteristics of multi-stage components of large-scale high-speed rotary equipment based on multi-biased error synchronous compensation and belongs to the technical field of mechanical assembly. Firstly, a single-stage rotor five-parameter circular contour measurement model is established, and the five-parameter circular contour measurement model is simplified by using a distance from an ith sampling point of an ellipse to a geometry center to obtain a simplified five-parameter circular contour measurement model. Then, actually measured circular contour data is taken into the simplified five-parameter circular contour measurement model to determine a relationship between dynamic response parameters after rotor assembly and eccentricity errors as well as the amount of unbalance of all stages of rotors. Finally, a rotor speed is set according to the relationship between the dynamic response parameters after rotor assembly and the eccentricity errors as well as the amount of unbalance of all stages of rotors to obtain a critical speed parameter objective function. The high-speed response critical speed parameters for n rotors assembly are optimized by adjusting assembly phases of all stages of rotors, so that a high-speed response to a multi-stage rotor of an aero-engine can be optimized.
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公开(公告)号：US20170276868A1
公开(公告)日：2017-09-28
申请号：US15503836
申请日：2016-03-02
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiwen CUI , Kunpeng FENG , Hong DANG , Shiyuan ZHAO , Junying LI , Jiubin TAN
IPC: G02B6/02
CPC classification number: G02B6/02209 , G01B11/18 , G02B6/02123 , G02B6/02185 , G02B6/04 , G11B11/00
Abstract: A fabrication method of the multi-core fiber Bragg grating (FBG) probe for measuring structures of a micro part based on the capillary self-assembly technique, wherein the diameter of the fiber (6) inscribed with FBG is reduced using a mechanical method or an etch method by the hydrofluoric acid; the fibers (6) inscribed with FBG, whose diameter has been reduced, are inserted into a tube (7) through its terminal with an inner taper angle; the FBG terminals of these fibers (6) are immersed into the UV adhesive (10) of a low viscosity and the UV adhesive (10) is raised in the gaps between the fibers (6); or the UV adhesive is dropped on the these fibers (6) and the capillary bridge between the fibers (6) is formed; a most compact structure of the fiber bundle is formed as a result of the capillary self-assembly; the fiber bundle is cured using a UV light and the multi-core FBG (11) is therefore formed; the terminal of the multi-core FBG (11) is polished with an optic fiber polishing machine and then a spherical tip is fabricated with the melting fiber method or the installation method of a micro ball; therefore, a multi-core FBG (11) probe can be achieved. The method features low crosstalk between signal of FBG, inexpensive and low insertion loss.
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10.发明申请MULTI-PERIOD MASTER-SLAVE NESTED RING ARRAY ELECTROMAGNETIC SHIELDING OPTICAL WINDOW HAVING CONCENTRIC RINGS 有权多段时间主从座环阵列电磁屏蔽具有集中环的光学窗公开(公告)号：US20170055381A1
公开(公告)日：2017-02-23
申请号：US15118820
申请日：2014-12-16
Applicant: HARBIN INSTITUTE OF TECHNOLOGY
Inventor： Jiubin TAN , Zhengang LU
IPC: H05K9/00
CPC classification number: H05K9/0094 , G02B5/1866 , G02B27/0018 , G02B27/46 , G02B2207/121 , H05K9/0086
Abstract: Optical windows based on a multi-period master-slave nested ring array of concentric rings are suited for electromagnetic shielding. A metal grid of the ring array has basic rings, concentric sub-ring pairs, secondary sub-rings, filling rings, concentric modulation ring pairs, and modulation sub-rings. Basic rings and concentric modulation ring pairs form a two-dimensional orthogonal array. External rings of concentric modulation ring pairs are externally tangentially connected to basic rings. Concentric sub-ring pairs and filling rings are arranged within basic rings, secondary sub-rings are arranged within concentric sub-ring pairs, and modulation sub-rings are arranged within concentric modulation ring pairs. Where rings are tangentially connected, wires overlap or metal ensures 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, causing stray light distribution caused by diffraction to be more uniform and imaging to be less affected.
Abstract translation: 基于多周期主从嵌套环形阵列的同步环的光学窗口适用于电磁屏蔽。 环形阵列的金属栅格具有基本环，同心子环对，次级子环，填充环，同心调制环对和调制子环。 基本环和同心调制环对形成二维正交阵列。 同心调制环对的外部环外部切向连接到基本环。 同心子环对和填充环布置在基本环内，次级子环布置在同心子环对内，调制子环布置在同心调制环对内。 当环切向连接时，电线重叠或金属确保连接环之间的可靠电连接，因此所有环都是导电的。 金属栅格结构显着降低了栅格高阶衍射光强度分布的不均匀性，导致衍射引起的杂散光分布更均匀，成像受到的影响较小。
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