公开(公告)号：US11342825B2

公开(公告)日：2022-05-24

申请号：US16741777

申请日：2020-01-14

Applicant: Guangdong University of Technology

Inventor： Zhijun Yang ,  Shengqiang Wei ,  Hao Peng ,  Youdun Bai ,  Guanxin Huang

IPC: G05B19/29 ,  H02K24/00 ,  H02K11/21 ,  G05B19/19 ,  H02K7/08 ,  H02K7/12 ,  H02K21/14

Abstract: A rigid-flexible coupling high-accuracy galvo scanning motor comprises: a stator, a rotor rotating relative to the stator, bearing seats and at least two groups of encoders. The rigid-flexible coupling bearings are installed on the rotating shaft of the rotor; each of the rigid-flexible coupling bearings comprises: a rigid bearing and a flexible hinge ring which is elastically deformable, and the flexible hinge ring is fixed in an inner ring of the rigid bearing; the at least two groups of encoders comprise: a first group of encoders and a second group of encoders; the first group of encoders is used to measure a rotation angle of the rotating shaft; and the second group of encoders is used to measure a rotation angle of the inner ring of the rigid bearing. A friction dead zone is avoided through the elastic deformation of the flexible hinge ring, thereby reducing a disturbance bandwidth.

公开(公告)号：US20170124249A1

公开(公告)日：2017-05-04

申请号：US15375174

申请日：2016-12-12

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Jian Gao ,  Xindu Chen ,  Yunbo He ,  Yun Chen ,  Chengxiang Li ,  Jianglong Wang

IPC: G06F17/50

CPC classification number: G06F17/5086 ,  G06F17/5009 ,  G06F17/5095

Abstract: A high-speed platform motion parameter self-tuning method based on model identification and equivalent simplification is provided, comprising: establishing a test of a motion state of a high-speed platform, identifying model parameters, and optimizing motion parameters of an equivalent simplified model; selecting any motion function from a pre-set parameterized curve, setting initial parameters, and driving the high-speed platform to move under the action of a controller and an actuator; collecting dynamic response information of the platform, calculating dynamic characteristic information of the platform such as stiffness, frequency, damping and the like; establishing a dynamic response equivalent simplified model by using the acquired dynamic characteristic information, and performing the optimization constrained by meeting motion precision and targeting at shorter execution time for the motion parameters in the selected parameterized motion function to obtain the optimum parameters. The method of the present invention gives consideration to the dynamic characteristic requirement of the platform and the comprehensive requirement of the parameter identification and optimization on the industrial site, facilitates the implementation of an algorithm in a motion control card, and is suitable for rapidly acquiring the optimum motion parameters of the actual high-speed platform on site.

公开(公告)号：US10236762B2

公开(公告)日：2019-03-19

申请号：US15375178

申请日：2016-12-12

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Xin Chen ,  Zhijun Yang ,  Youdun Bai ,  Jian Gao ,  Hanxiong Li ,  Haidong Yang ,  Yisheng Guan ,  Xindu Chen

IPC: H02K41/02 ,  B23Q1/44 ,  B23Q5/28 ,  H02K11/22 ,  H01L41/09

Abstract: A common-stator macro/micro integrated precision motion one-dimensional linear motor assembly, includes a base, linear guide rails, slide blocks, a U-shaped linear motor stator, a macro motion rotor, a micro motion rotor and a macro/micro integrated platform. A macro and micro motion platforms are connected to form an integrated platform through an elastic member, an outer frame of the macro/micro integrated platform is mounted on the linear guide rails and the slide blocks, the U-shaped linear motor stator is arranged on the base, rotors are respectively mounted on the macro and micro motion platforms, and large-scale overall high-speed motion can be realized when macro and micro rotors are simultaneously driven, and when a motion deviation occurs, the micro motion platform realizes precise displacement output by virtue of elastic deformation due to small inertia and zero friction, and high-frequency motion deviation compensation can be realized by virtue of individual drive.

公开(公告)号：US10232477B2

公开(公告)日：2019-03-19

申请号：US15376658

申请日：2016-12-13

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Jian Gao ,  Xindu Chen ,  Yunbo He ,  Yun Chen ,  Ruiqi Li ,  Chaoran Chen

IPC: B23Q1/25 ,  B25H1/02 ,  B23Q1/34 ,  B23Q11/00

Abstract: The present invention proposes a macro-micro integrated compound platform with adjustable dynamic characteristics. When a macro platform mover and a micro platform mover are driven at the same time, the whole large-scale high-speed motion can be realized; when a motion deviation occurs, a micro motion platform can be driven separately to realize the high-frequency motion deviation compensation, because the micro motion platform has small inertia and zero friction and achieves precision displacement output through elastic deformation. The macro-micro integrated compound platform can realize high-speed precision motion through compound motion control, is mounted and used in a manner consistent with the traditional platform, and is convenient to be popularized and applied; a stiffness and frequency adjustment mechanism and a variable damper are arranged, so that the micro motion platform can transfer the motion of a macro motion platform and isolate the vibration at any frequency, and realize high-precision displacement compensation; meanwhile, damping of the variable damper is matched with the stiffness and frequency parameters to ensure the high-precision displacement compensation at any frequency and increase the range of working frequency.

公开(公告)号：US09945698B2

公开(公告)日：2018-04-17

申请号：US15114087

申请日：2014-09-24

Applicant: Guangdong University of Technology

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Jian Gao ,  Haidong Yang ,  Meng Wang

IPC: G01D5/347

CPC classification number: G01D5/34707 ,  G01D5/34746

Abstract: The present disclosure relates to a macro-micro composite grating ruler measuring system based on conversion and amplification in vertical and horizontal directions. The macro-micro composite grating ruler includes a grating ruler, a macro-micro reading system moving with respect to the grating ruler, and a counting and image processing module. The macro-micro reading system faces grating strip datum and is parallel to the grating ruler. The system further includes a measuring reference line. The measuring reference line obtained by the image sensor together with grating strips forms an image overlap in the counting and image processing module. The measuring reference line and the grating strip jointly include an angle θ. With the foregoing configuration, the present invention is compatible with the existing incremental grating rulers and absolute grating rulers, so is highly applicable.

公开(公告)号：US09746123B2

公开(公告)日：2017-08-29

申请号：US15376654

申请日：2016-12-12

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Chaoran Chen ,  Chengxiang Li

IPC: F16M13/00 ,  F16M7/00 ,  F16F15/02 ,  F16F15/073

CPC classification number: F16M7/00 ,  F16F3/10 ,  F16F15/02 ,  F16F15/022 ,  F16F15/073 ,  F16F15/08 ,  F16F15/085 ,  F16F2224/02 ,  F16F2228/04 ,  F16F2228/066 ,  F16F2228/08 ,  F16F2230/34

Abstract: A composite frequency-adjustable shock absorber is provided, comprising a motion main machine stand bar and a shock absorption device, which are arranged on a foundation carrier platform; the shock absorption device is divided into an upper shock absorption device and a lower shock absorption device, the shock absorption device is arranged on a base with an inner cavity, and the upper shock absorption device for suppressing the low-frequency vibration and the lower shock absorption device for absorbing additional high-frequency vibration are connected in series; the upper shock absorption device comprises an elastic component based on a flexible hinge group and a prestress adjusting device, the flexible hinge group is arranged in the inner cavity of the base, the prestress adjusting device for adjusting the inherent frequency of the flexible hinge group is connected with the flexible hinge group, and the motion main machine stand bar is fixed on a load bearing portion of the flexible hinge group. The inherent frequency of the whole flexible hinge group is changed, so the high frequency band and the low frequency band of vibration systems with different masses and different excitation frequencies are effectively isolated, the structure is simple, the adjustment is convenient, and the cost is not high.

公开(公告)号：US20170089505A1

公开(公告)日：2017-03-30

申请号：US15376654

申请日：2016-12-12

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Chaoran Chen ,  Chengxiang Li

IPC: F16M7/00 ,  F16F15/073 ,  F16F15/02

CPC classification number: F16M7/00 ,  F16F3/10 ,  F16F15/02 ,  F16F15/022 ,  F16F15/073 ,  F16F15/08 ,  F16F15/085 ,  F16F2224/02 ,  F16F2228/04 ,  F16F2228/066 ,  F16F2228/08 ,  F16F2230/34

Abstract: A composite frequency-adjustable shock absorber is provided, comprising a motion main machine stand bar and a shock absorption device, which are arranged on a foundation carrier platform; the shock absorption device is divided into an upper shock absorption device and a lower shock absorption device, the shock absorption device is arranged on a base with an inner cavity, and the upper shock absorption device for suppressing the low-frequency vibration and the lower shock absorption device for absorbing additional high-frequency vibration are connected in series; the upper shock absorption device comprises an elastic component based on a flexible hinge group and a prestress adjusting device, the flexible hinge group is arranged in the inner cavity of the base, the prestress adjusting device for adjusting the inherent frequency of the flexible hinge group is connected with the flexible hinge group, and the motion main machine stand bar is fixed on a load bearing portion of the flexible hinge group. The inherent frequency of the whole flexible hinge group is changed, so the high frequency band and the low frequency band of vibration systems with different masses and different excitation frequencies are effectively isolated, the structure is simple, the adjustment is convenient, and the cost is not high.

公开(公告)号：US20170001275A1

公开(公告)日：2017-01-05

申请号：US15114090

申请日：2014-09-24

Applicant: GUANGDONG UNIVERSITY OF TECHNOLOGY

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Jian Gao ,  Haidong Yang ,  Meng Wang ,  Hui Tang

IPC: B23Q1/34 ,  B23Q5/28 ,  B23Q1/62

CPC classification number: B23Q1/34 ,  B23Q1/62 ,  B23Q5/28 ,  B23Q2210/002 ,  B23Q2230/004

Abstract: The present disclosure involves occasions where precise two-dimensional motion takes place, and is applicable to XY motion stages for precise displacement compensation. The present disclosure particularly involves a stiffness-frequency adjustable XY micromotion stage based on stress stiffening, which includes X-direction and Y-direction motion sub-stages and corresponding drivers and a micromotion working table. The micromotion stage uses membrane sets that have tension levels thereof adjusted by bolts as a flexible hinge, so as to achieve independent adjustment of the vibration frequency of the XY micromotion stage. The present disclosure implements the foregoing configuration based on prestressed membrane, so the frequency is adjustable. The inherent frequency of the micromotion stage can be adjusted before or during operation according to various working conditions and driving frequency. The two feed motion direction are perpendicular so as to prevent the micromotion working table from coupling during two-dimensional motion.

Abstract translation: 本公开涉及发生精确二维运动的场合，并且适用于用于精确位移补偿的XY运动台。 本公开特别涉及基于应力硬化的刚度 - 频率可调XY微动平台，其包括X方向和Y方向运动子级以及相应的驱动器和微动作工作台。 微动阶段使用具有通过螺栓调节的张力水平的膜组作为柔性铰链，以便实现XY微动阶段的振动频率的独立调整。 本公开实现了基于预应力膜的上述构造，因此频率是可调节的。 可以根据各种工作条件和驱动频率在操作前或操作期间调整微动阶段的固有频率。 两个进给运动方向是垂直的，以防止微动工作台在二维运动期间耦合。

公开(公告)号：US11157024B2

公开(公告)日：2021-10-26

申请号：US16558207

申请日：2019-09-02

Applicant: Guangdong University of Technology

Inventor： Zhijun Yang ,  Qian Li ,  Hao Peng ,  Youdun Bai

IPC: G05D3/12 ,  F16H25/22 ,  G05B19/40 ,  G05D13/62 ,  F16H25/20

Abstract: A rigid-flexible coupling motion platform driven by a ball screw includes a base, a linear guide rail fixed to the base, a rigid-flexible coupling platform, a servo motor, a ball screw, a guide rail sliding block, a displacement sensor and a driving controller. The rigid-flexible coupling platform includes a frame and a workbench. The frame and the workbench are connected through a flexible hinge; the servo motor is configured to drive the ball screw; the workbench is connected with the ball screw; the frame is connected with the linear guide rail by the guide rail sliding block; the displacement sensor is configured to feed back the position of the workbench; and the driving controller controls the ball screw to drive the workbench to move according to different control modes. The advantages of the ball screw drive and the rigid-flexible coupling motion platform are fully combined, and the positioning precision of the platform is greatly improved.

公开(公告)号：US10239167B2

公开(公告)日：2019-03-26

申请号：US15114090

申请日：2014-09-24

Applicant: Guangdong University of Technology

Inventor： Zhijun Yang ,  Youdun Bai ,  Xin Chen ,  Jian Gao ,  Haidong Yang ,  Meng Wang ,  Hui Tang

IPC: B23Q1/34 ,  B23Q1/62 ,  B23Q5/28

Abstract: The present disclosure involves occasions where precise two-dimensional motion takes place, and is applicable to XY motion stages for precise displacement compensation. The present disclosure particularly involves a stiffness-frequency adjustable XY micromotion stage based on stress stiffening, which includes X-direction and Y-direction motion sub-stages and corresponding drivers and a micromotion working table. The micromotion stage uses membrane sets that have tension levels thereof adjusted by bolts as a flexible hinge, so as to achieve independent adjustment of the vibration frequency of the XY micromotion stage. The present disclosure implements the foregoing configuration based on prestressed membrane, so the frequency is adjustable. The inherent frequency of the micromotion stage can be adjusted before or during operation according to various working conditions and driving frequency. The two feed motion direction are perpendicular so as to prevent the micromotion working table from coupling during two-dimensional motion.