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11.发明公开公开(公告)号：US20230341547A1
公开(公告)日：2023-10-26
申请号：US18120609
申请日：2023-03-13
Applicant: Harbin Engineering University
Inventor： Shengchun PIAO , Yunjia SHI , Junyuan GUO , Minghui ZHANG
Abstract: The present disclosure belongs to the field of underwater target detection, and in particular, to a method for detecting a moving target based on spatial slices of transformed spatio-temporal frequency space. The method includes: segmenting a target radiated acoustic signal received by an M-element horizontal line array in an underwater acoustic environment with a low signal-to-noise ratio (SNR); performing N-point discrete Fourier transform (DFT) on the received signal on each array element in each period of time; performing frequency domain beamforming on an array signal after each section of DFT, and performing stacking after compensating a phase difference between arrays brought by an azimuth of each primitive element; performing coordinate transformation on a frequency-azimuth-time three-dimensional (3D) matrix space obtained; taking a slice from the obtained frequency-azimuth-time 3D space subjected to the coordinate transformation; and performing segmented Radon transform on the spatial slice obtained to detect the target.
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12.发明公开公开(公告)号：US20230287851A1
公开(公告)日：2023-09-14
申请号：US17958933
申请日：2022-10-03
Applicant: HARBIN ENGINEERING UNIVERSITY
Inventor： Jianhui ZHAO , Xiangdong LU , Heng ZHANG , Yu XU , Weilong LIU
IPC: F02M51/06
CPC classification number: F02M51/0621 , F02M51/0635
Abstract: The present invention provides a permanent magnet-electromagnet synergistic coupling-based high-speed solenoid valve with a high dynamic response and a low rebound, including a shell and an iron core. The iron core is installed in the shell, an axial center through hole is formed in a middle of the iron core, a spring limiting sleeve is installed in the axial center through hole, an armature and a reset spring cavity are sequentially formed below the iron core, an upper portion of a valve rod is located in the spring limiting sleeve, an upper disc permanent magnet, a lower disc permanent magnet and a spring washer are arranged in the spring limiting sleeve, and a giant magnetostrictor is installed between the upper disc permanent magnet and the lower disc permanent magnet. By means of the present invention, electromagnetic force generated during pickup of the armature can be effectively improved.
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13.发明申请公开(公告)号：US20220326016A1
公开(公告)日：2022-10-13
申请号：US17843451
申请日：2022-06-17
Applicant: Harbin Engineering University
Inventor： Yuxin Zhao , Bo Xu , Yu Guo , Lei Wu , Junmiao Hu , Chong Chen , Lianzhao Wang , Shengxin Li , Xiaoyu Wang , Zhaoyang Wang
IPC: G01C21/16
Abstract: The disclosure belongs to the technical field of integrated navigation under non-ideal conditions, and in particular relates to a robust filtering method for integrated navigation based on a statistical similarity measure (SSM). In view of the situation that there are normal beam measurement information of the DVL and beam measurement information with a large error simultaneously in a SINS/DVL tightly integrated system, and aiming at the problem that the existing robust filters of an integrated navigation system process the measurement information in a rough manner and are likely to lead to loss of normal measurement information, the disclosure proposes a novel robust filtering method based on decomposition of multi-dimensional measurement equations and the SSM. The disclosure introduces the SSM theory while decomposing the multi-dimensional measurement equations of the SINS/DVL tightly integrated navigation system, and assists the measurement noise variance of each beam to complete respective adaptive update in case of a large measurement error, finally ensuring independence of processing of the measurement information of each beam. The disclosure can be used in the field of integrated navigation of underwater vehicles under non-ideal conditions.
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公开(公告)号：US11454203B2
公开(公告)日：2022-09-27
申请号：US17564589
申请日：2021-12-29
Applicant: Harbin Engineering University
Inventor： Long Liu , Shihai Liu , Dai Liu , Jian Zhang , Yue Wu , Chen An , Qihao Mei , Wang Yang
Abstract: The present disclosure provides an apparatus for testing spray and combustion performance of an internal-combustion engine based on a rapid compression-expansion machine, which belongs to the testing field of internal-combustion engines. It includes a driving mechanism, a transmission mechanism, an engine cylinder, an air intake system and an exhaust system. The engine cylinder includes a piston, a cylinder block, a dual-fuel cylinder head and a multi-injector assembly. The piston is disposed in the cylinder block. The driving mechanism is connected with the piston through the transmission mechanism and drives the piston to linearly move back and forth along a vertical direction of the cylinder block. The dual-fuel cylinder head is connected to an upper part of the cylinder block. The multi-fuel injection assembly includes a plurality of injectors. The plurality of injectors are of the same type and are all disposed on the dual-fuel cylinder head.
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公开(公告)号：US11421586B2
公开(公告)日：2022-08-23
申请号：US17565531
申请日：2021-12-30
Applicant: Harbin Engineering University
Inventor： Long Liu , Chen An , Zhichun Xu , Yuanheng Tang , Hao Zhao , Xiao Han , Junjie Liu , Qihao Mei
Abstract: The present disclosure provides a six-cylinder opposed free piston internal combustion engine generator. The generator comprises two free piston internal combustion engine sets, one opposed piston internal combustion engine set and two linear generator sets. Air entering cylinders is subjected to first-stage compression in low-pressure cylinder sets in the free piston internal combustion engine sets and the opposed piston internal combustion engine set and then subjected to second-stage compression in high-pressure cylinder sets, and a high pressure gas produced after the combustion is subjected to first-stage expansion in the high-pressure cylinder sets and then subjected to second-stage expansion in the low-pressure cylinder sets.
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Patent Agency Ranking
公开(公告)号：US11215138B1
公开(公告)日：2022-01-04
申请号：US17121951
申请日：2020-12-15
Applicant: Harbin Engineering University
Inventor： Jie Guo , Xinyu Zhang , Wenping Zhang , Ye Wang
Abstract: A low-noise main bearing cap for an internal combustion engine is designed that includes a main bearing cap body, wherein the main bearing cap body is connected to an engine body main bearing seat. The main bearing cap body is provided with a vibration isolator A vibration isolation structure is provided between the main bearing cap body and the vibration isolator The main bearing cap body is connected with the vibration isolator through a connector The vibration isolation structure comprises an S-shaped structure and an oil film gap, and the vibration isolator is provided with an oil inlet passage which is communicated with the oil film gap. The present design solves the control problem of the main bearing vibration source caused by the main bearing load.
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公开(公告)号：US20210373855A1
公开(公告)日：2021-12-02
申请号：US17236220
申请日：2021-04-21
Applicant: Harbin Engineering University
Inventor： Qian SUN , Ya ZHANG , Zicheng Wang , Hongze Gao , Guochang Zhang , Qingxin Wang , Jiachong Chang , Shiwei Fan
Abstract: The present disclosure designs a rotation matrix-based factor graph cooperative localization algorithm. Firstly, the reasons of sudden increase in an error in an operation process of a conventional factor graph cooperative localization algorithm are analyzed; secondly, a rotation matrix is designed, and the size of a rotation angle is determined; then, a rotation matrix-based cooperative localization algorithm factor graph model is constructed, and a specific algorithm flow is designed; and finally, filtering fusion estimation is performed on position status information of a slave boat. Therefore, coordinate values of master and slave boats can be transformed within a factor graph in real time without changing the measurement accuracy of an inertial device in a system to cause the coordinates of the master and slave boats that participate in the calculation of the factor graph to be inconsistent, thereby solving the problem of sudden increase in a localization error of the conventional factor graph cooperative localization algorithm, and improving the robustness of the cooperative localization system.
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公开(公告)号：US11110513B2
公开(公告)日：2021-09-07
申请号：US16641176
申请日：2017-12-12
Inventor： Fengchun Jiang , Yuanping Chen , Ding Yuan , Dacheng Hua , Chunhuan Guo
Abstract: A combined ultrasonic micro-forging device and a related additive manufacturing method for improving the microstructure and mechanical properties of additive manufactured metal part. The device comprises a transducer, a pneumatic sliding table, a pneumatic sliding table connecting frame, an amplitude transformer, a tool head and a roller, wherein the transducer is provided in a transducer housing, a socket connector and a pipeline connector are provided on the transducer housing, the amplitude transformer is connected under the transducer, the tool head is connected under the transducer, the roller is located between the tool head and workpiece, and the pneumatic sliding table is connected to the transducer housing and the amplitude transformer via the pneumatic sliding table connecting frame. The ultrasonic micro-forging device of high frequency ultrasonic impact and larger deformation produced by mechanical rolling, thereby generating a composite action of ultrasonic impact and continuous rolling micro-forging.
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公开(公告)号：US11034424B2
公开(公告)日：2021-06-15
申请号：US16801346
申请日：2020-02-26
Applicant: Harbin Engineering University
Inventor： Liyun Fan , Zhaohui Xiao , Chao Xu , Yaowen Lu , Hengxi Zhang
Abstract: An object of the present disclosure is to provide a gas-electric parallel-serial hybrid marine power train system with LNG cooling, including a gas engine, an electric generator, a motor, a natural gas storage supplier. The gas engine is connected to the shaft belt motor through a gearbox, the motor is connected to the gearbox through a clutch, propellers are connected to the motor, and an engine cooling system and a fuel cell cooling system are connected to an LNG vaporization heat exchange apparatus; the electrical energy sources are the fuel cell, the electric generator and a storage battery. The arrangement of multiple power sources according to the present disclosure can meet ship requirements under various environments and circumstances, improve operating efficiencies of the gas engine, the shaft belt motor and the electric motor.
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20.发明申请公开(公告)号：US20210117796A1
公开(公告)日：2021-04-22
申请号：US17136409
申请日：2020-12-29
Applicant: Harbin Engineering University
Inventor： Qian SUN , Zhong Tang , Qianhui Dong , Yibing Li , Fang Ye , Yuan Tian , Fei Yu
Abstract: The disclosure discloses a ship motion prediction method based on long short-term memory network and Gaussian process regression. The method includes: normalizing acquired ship motion historical data under a certain degree of freedom to form a ship motion original time series; dividing the original time series into a training set and a test set; reconstructing a data set according to the training set and the test set, and establishing a long short-term memory (LSTM) network model for prediction to obtain prediction results of the first ship motion; reconstructing a data set, and establishing a Gaussian process regression (GPR) model for prediction to obtain prediction results of the second ship motion; and denormalizing the prediction results obtained by the Gaussian process regression model to obtain final ship motion prediction results. Aiming at highly non-linear ship motion, the disclosure can obtain ship motion interval prediction results with probability distribution significance while obtaining high-accuracy point prediction results.
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