公开(公告)号：US20210095993A1

公开(公告)日：2021-04-01

申请号：US17013741

申请日：2020-09-07

Applicant: Harbin Engineering University

Inventor： Jianhua CHENG ,  Ping LIU ,  Guangdi LUO ,  Li YANG ,  Xiangyu SUN ,  Wenhuan FU ,  Mingtao DONG ,  Ping DONG

IPC: G01C25/00 ,  G01C19/5776

Abstract: The disclosure provides an experimental calibration method of a redundant inertial measurement unit including, step (1), establishing an installation angle model using a cone descriptive scheme, and obtaining a relationship of an angular speed of a carrier and an angular speed measured by each gyroscope, step (2), establishing a standard calibration model of the redundant inertial measurement unit based on a relationship between a sensor coordinate system and a carrier coordinate system, step (3), establishing a state equation and a measurement equation of a filter, step (4), performing a row amplification of measurement amounts based on the measurement equation established in step (3), and obtaining an amplificated measurement equation for improving observability, and step (5), obtaining a Jacobi matrix and a Hessian matrix based on the amplificated measurement equation, and estimating error parameters by an extended Kalman filtering algorithm based on a second-order Taylor expansion.

公开(公告)号：US10439594B2

公开(公告)日：2019-10-08

申请号：US15519823

申请日：2014-12-01

Applicant: Yuxin Zhao ,  HARBIN ENGINEERING UNIVERSITY

Inventor： Yuxin Zhao ,  Chang Liu ,  Xuefeng Zhang ,  Liqiang Liu ,  Gang Li ,  Feng Gao ,  Ning Li ,  Zhifeng Shen ,  Zhenxing Zhang ,  Zhao Qi

IPC: G06F17/50 ,  H03H17/02

Abstract: The present invention provides an actually-measured marine environment data assimilation method based on sequence recursive filtering three-dimensional variation. The method includes: preprocessing actually-measured marine environment data; calculating a target function value; calculating a gradient value of a target function; calculating a minimum value of the target function; extracting space multi-scale information from the actually-measured data; and updating background field data to form a final data assimilation analysis field. The present invention improves the traditional recursive filtering three-dimensional variation method, and sequentially assimilates information with different scales, thereby effectively overcoming the problem that multi-scale information cannot be effectively extracted by a traditional three-dimensional variation method. A high-order recursive Gaussian filter is used, and a cascaded form of the high-order recursive filter is converted into a parallel structure, so that the recursive filtering process of the recursive Gaussian filter can be executed in parallel, and many problems caused by a cascaded filter are overcome.

公开(公告)号：US12297847B1

公开(公告)日：2025-05-13

申请号：US18942128

申请日：2024-11-08

Applicant: Harbin Engineering University

Inventor： Yipeng Cao ,  Shaoran Du ,  Chen Liu ,  Yao Song ,  Jie Yang ,  Xiaochen Zhao ,  Jie Guo ,  Xinyu Zhang

IPC: F04D29/66 ,  F04D17/10 ,  F04D29/28

Abstract: A noise-reducing and nonuniform tip clearance structure of centrifugal compressor is provided, which includes a compressor impeller body and a compressor impeller shroud. The compressor impeller shroud is circumferentially wrapped outside the compressor impeller body, and multiple impeller blade bodies are uniformly arranged in a circumferential direction of the compressor impeller body. A clearance between an impeller tip meridian line of the impeller blade body and an impeller shroud meridian line on the compressor impeller shroud is an impeller tip clearance. The impeller tip clearance gradually decreases in a direction from a leading edge to a trailing edge of the impeller blade body, and a change rate of the impeller tip clearance in the direction from the leading edge to the trailing edge of the impeller blade body also gradually decreases.

公开(公告)号：US20250052642A1

公开(公告)日：2025-02-13

申请号：US18519040

申请日：2023-11-26

Applicant: Harbin Engineering University

Inventor： Quan Dong ,  Chao Chen ,  Min Wang ,  Xiaoyan Wang ,  Daijun Wei

IPC: G01M15/04 ,  F02M65/00 ,  G01D5/14

Abstract: A non-invasive device for simultaneous testing dynamic characteristics and injection law of a gas needle valve and a method therefor are disclosed. The device includes a tested injector, a pressure sensor, a temperature sensor, an eddy current displacement sensor, a constant volume sealed container, and a controller. A nozzle of the tested injector is inserted into a constant volume cavity of the constant volume sealed container; the eddy current displacement sensor is arranged at a lower part of a gas needle valve of the tested injector; the pressure sensor and the temperature sensor are inserted into the constant volume cavity; and the controller is configured to receive displacement data, pressure data, and temperature data, and calculate the injection law of the tested injector based on the pressure data and the temperature data, achieving multi parameters testing of the needle valve lift and injection law in the same time and space.

公开(公告)号：US12106015B2

公开(公告)日：2024-10-01

申请号：US18618218

申请日：2024-03-27

Applicant: HARBIN ENGINEERING UNIVERSITY

Inventor： Genglei Xia ,  Yuandong Zhang ,  Chenyang Wang ,  Minjun Peng ,  Bowen Zhang ,  Jilin Sun

IPC: G06F30/13 ,  G06F30/20

CPC classification number: G06F30/13

Abstract: A method and a system for evaluating and simulating a nuclear power plant based on a model are provided, which includes a plant top-level demand module, a function realization module, a logical architecture construction module, an evaluation and simulation configuration module, a function evaluation module, an overall performance evaluation module, a data information communication module and a model base module.

公开(公告)号：US12061087B2

公开(公告)日：2024-08-13

申请号：US17846128

申请日：2022-06-22

Applicant: Harbin Engineering University

Inventor： Yuxin Zhao ,  Tingxiao Wei ,  Yueyang Ben ,  Lei Wu ,  Qian Li ,  Guangtao Zhou ,  Qianqian Gao ,  Xiaofeng Wei ,  Shuaiyang Li

IPC: G01C21/20 ,  G01C21/16

CPC classification number: G01C21/203 ,  G01C21/16

Abstract: A strapdown inertial navigation heave measurement method using multiple low-pass filter units includes: firstly, collecting data of a gyroscope and an accelerometer by a system, obtaining attitude information of a carrier by using initial alignment, and then, obtaining a relationship matrix between a body coordinate system and a geographic coordinate system by using the attitude information; obtaining a relationship matrix between the geographic coordinate system and a reference coordinate system according to a geographic position, and obtaining a rough vertical acceleration by using a direction cosine matrix, output information of the accelerometer and gravity information; then, filtering out low-frequency signals by using a first filter unit and integration to obtain a relatively accurate velocity signal; and furthermore, enabling the vertical acceleration to be subjected to a second filter unit and integration to obtain an accurate heave displacement.

公开(公告)号：US12050449B2

公开(公告)日：2024-07-30

申请号：US17691191

申请日：2022-03-10

Applicant: Harbin Engineering University

Inventor： Yongkuo Liu ,  Xin Ai ,  Longfei Shan ,  Xueying Huang

IPC: G05B19/05

CPC classification number: G05B19/058 ,  G05B2219/161

Abstract: The present disclosure relates to an online monitoring method of a nuclear power plant system based on an isolation forest method and a sliding window method. An isolation forest method used in the present disclosure is an abnormal detection model based on the idea of binary tree division, and has no requirements on the dimension and linear characteristics of monitoring data. In view of the characteristics of strong nonlinearity and high dimension of operation data of the nuclear power plant system, in the process of state monitoring, system abnormalities can be detected more quickly and accurately. In the present disclosure, a sliding window method is used to improve an isolation forest model, so that the improved isolation forest model has the functions of model online updating and real-time state monitoring, and the usability of an isolation forest state monitoring method is enhanced.

公开(公告)号：US12049936B2

公开(公告)日：2024-07-30

申请号：US18307072

申请日：2023-04-26

Applicant: Harbin Engineering University

Inventor： Fuzhen Pang ,  Haichao Li ,  Cong Gao ,  Xueren Wang ,  Yuan Du ,  Yang Tang ,  Shengyao Gao ,  Changwei Su ,  Yuxuan Qin ,  Ran Liang ,  Yuhang Tang ,  Xin Li

IPC: F16F15/023 ,  F16F15/02 ,  F16M5/00 ,  F16M11/22

CPC classification number: F16F15/023 ,  F16F15/022 ,  F16M5/00 ,  F16M11/22 ,  F16F2222/12 ,  F16F2230/007 ,  F16F2232/08 ,  F16M2200/08

Abstract: The present disclosure provides an efficient vibration reduction and isolation base supported by a chained panel fluid bladder, including a chained panel, the vibration reduction fluid bladder, vertical limiting devices and a bottom plate. The chained panel is a discontinuous structure formed by connecting chained substructure panels in series by panel hinge devices. The vibration reduction fluid bladder and the vertical limiting devices are fixedly installed between the chained panel and the bottom plate. The chained panel is constructed based on the impedance mismatch principle and provided with a mechanical device. Mechanical vibration energy is dissipated twice by the chained panel and the vibration reduction fluid bladder, thereby greatly reducing influences of mechanical device operation on a hull structure. The present disclosure abandons a traditional base design of a continuous panel, is simple in structure and good in vibration reduction performance, and has good economy and wide application prospects.

公开(公告)号：US20240242001A1

公开(公告)日：2024-07-18

申请号：US18618218

申请日：2024-03-27

Applicant: HARBIN ENGINEERING UNIVERSITY

Inventor： Genglei XIA ,  Yuandong ZHANG ,  Chenyang WANG ,  Minjun PENG ,  Bowen ZHANG ,  Jilin SUN

IPC: G06F30/13

CPC classification number: G06F30/13

Abstract: A method and a system for evaluating and simulating a nuclear power plant based on a model are provided, which includes a plant top-level demand module, a function realization module, a logical architecture construction module, an evaluation and simulation configuration module, a function evaluation module, an overall performance evaluation module, a data information communication module and a model base module.

公开(公告)号：US20240192088A1

公开(公告)日：2024-06-13

申请号：US17801178

申请日：2022-06-28

Applicant: HARBIN ENGINEERING UNIVERSITY

Inventor： Zhitao Wang ,  Jian Li ,  Liang Ming ,  Shuying Li ,  Jiayi Ma ,  Tianhao Guan ,  Jiafan Luo

IPC: G01M15/14 ,  G01M15/02

CPC classification number: G01M15/14 ,  G01M15/02

Abstract: The present disclosure provides a semi-physical simulation test bench and test method for a multi-machine parallel operation device of gas turbines. The gas turbines are all connected with gearbox shafts through SSS clutches, torque meters and couplers, and then a hydraulic dynamometer, an electric turbine dynamometer and a generator are independently or jointly driven through couplers and torque meters so as to charge a storage battery. Multi-shaft gearboxes comprise parallel operation gearboxes, and are connected with a bridging gearbox through couplers, electromagnetic clutches, supports, torque meters and couplers. The gas turbines can drive an electric dynamometer and the electric turbine dynamometer independently or cooperatively, so that the system has good operation characteristics under different working conditions. Meanwhile, the storage battery is additionally arranged, the flexibility of the test bench is improved, and the energy utilization rate is increased.