公开(公告)号：US11170786B1

公开(公告)日：2021-11-09

申请号：US17334790

申请日：2021-05-30

Applicant: Harbin Institute of Technology (Shenzhen) (Shenzhen Institute of Science and Technology Innovation, Harbin Institute of Technology)

Inventor： Qing Liao ,  Yangqian Wang ,  Yang Liu ,  Lin Jiang ,  Xuan Wang ,  Ye Wang

IPC: G10L17/06 ,  G06N20/00 ,  G10L17/04 ,  G10L17/02

Abstract: The present disclosure proposes a federated speaker verification method based on differential privacy, including: 1. performing, by a server, UBM pre-training to obtain an initial UBM; 2. receiving, by the client, the pre-trained initial UBM, and performing initial UBM learning based on local private speech data; 3. performing, by the client, differential privacy protection based on learned statistics; 4. aggregating, by the server, statistics uploaded by multiple clients, and updating the initial UBM; and 5. receiving, by the client, the updated UBM, performing adjustment based on the local private speech data to obtain a GMM for a user of the client, and determining, based on the updated UBM and the GMM, whether a to-be-verified speech is generated by the user of the client.

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

IPC: G05B13/02 ,  G05B19/19

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.

公开(公告)号：US09989973B2

公开(公告)日：2018-06-05

申请号：US14892778

申请日：2014-05-06

Applicant: Harbin Institute of Technology

Inventor： Xinglin Chen ,  Yang Liu ,  Cong Li ,  Weifeng Wang ,  Chuan Liu

IPC: G05D3/12 ,  G05B19/27 ,  F16M11/26 ,  F16F15/00 ,  F16M11/12 ,  F16M11/18 ,  F16M11/32 ,  G05B15/02

CPC classification number: G05D3/12 ,  F16F15/00 ,  F16F15/002 ,  F16M11/121 ,  F16M11/18 ,  F16M11/26 ,  F16M11/32 ,  G05B15/02 ,  G05B19/27 ,  G05B2219/49276

Abstract: A measurement control system for a multi-shaft supported air floatation platform, the system comprising a load feedback unit (5), an execution unit (6), a position measurement unit (7), a safety protection unit (8), a controller (9), a rotating motor (10), and a linear light source 11; the load feedback unit comprises M pressure sensors (5-1) and four differential sensors (5-2); the execution unit comprises M servo voice coil motors (6-1) and M servo voice coil motor drivers (6-2); the position measurement unit comprises a plane grating (7-1), M linear gratings (7-2) a linear array CCD (7-3), a tilt sensor (7-4), M electronic levels (7-5), and an indoor GPS (7-6); the safety protection unit comprises 2M proximity sensors (8-1) and M temperature sensors (8-2); and the linear array CCD consists of no few then six CCDs. The system solves the problems of leveling limitations and narrow application range of existing supporting platforms.

公开(公告)号：US11831256B2

公开(公告)日：2023-11-28

申请号：US17676888

申请日：2022-02-22

Applicant: Harbin Institute of Technology

Inventor： Yang Liu ,  Qian Miao ,  Ning Cui

IPC: H02N2/06 ,  G01D5/14 ,  G01D5/20 ,  G05D23/19 ,  H02N2/02

CPC classification number: H02N2/062 ,  G01D5/142 ,  G01D5/20 ,  G05D23/1917 ,  H02N2/023

Abstract: A short-travel nanoscale motion stage and a method for measuring thermally-related hysteresis data are provided. A stator unit of a left two-pole electromagnet and stator units of two inchworm motors are fixed on a right side surface of a left foundation frame, and an active unit of the left two-pole electromagnet and actives of the two inchworm motors are fixed on a left side surface of a stage moving component. An active unit of a right two-pole electromagnet is fixed on a right side surface of the stage moving component, while a stator unit of the right two-pole electromagnet is fixed on a left side surface of a right foundation frame. The stage moving component is fixedly mounted on a guide sleeve of an aerostatic guideway. Each of the stator units of the left and right two-pole electromagnets has an eddy current sensor and a hall sensor fixed therein.