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公开(公告)号：US20210156314A1
公开(公告)日：2021-05-27
申请号：US16770801
申请日：2019-11-05
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Nan DING , Yanhua MA , Yanlei GAO , Xian DU , Rui WANG
Abstract: A method for active fault tolerant control of a turbofan engine control system designs a linear parameter varying gain scheduling robust tracking controller with good dynamic performance. Adaptive estimation of fault amplitude of a sensor and an actuator is realized according to the change of the operating state of the turbofan engine to accurately reconfigure a fault signal. An active fault tolerant control strategy based on a virtual actuator is designed according to a fault estimation result. Without redesigning the controller, through the designed active fault tolerant control strategy, on the premise of ensuring the stability of the control system, a control effect similar to that of the control system without fault is obtained.
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132.发明申请公开(公告)号：US20210155837A1
公开(公告)日：2021-05-27
申请号：US17042462
申请日：2019-05-07
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Jinlong SONG , Liu HUANG , Xin LIU , Xuyue WANG , Yuwen SUN
IPC: C09K3/18
Abstract: A superhydrophobic hemispherical array which can realize droplet pancake bouncing phenomenon is provided. The superhydrophobic hemispherical array shows an arc-shape structure which is narrow at the top and wide at the bottom, where a is the angle that substrate-gas interface goes across the gas and reaches substrate-hemisphere interface, d refers to the diameter of the contact area between hemispherical structure and substrate, s represents the space between two adjoining hemispheres, h denotes the vertical height from the top of hemisphere to substrate surface, and 70°≤a≤90°, 900 μm≤d ≤1700 μm, s≤550 μm, 600 μm≤h≤1100 μm, respectively. The superhydrophobic hemispherical array has a water contact angle larger than 150° and roll-off angle lower than 10°.
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133.发明申请公开(公告)号：US20210154721A1
公开(公告)日：2021-05-27
申请号：US16937660
申请日：2020-07-24
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhubin HE , Yanan LI , Yanli LIN , Xinyu HU , Linwei LENG , Shijian YUAN
IPC: B21D26/041 , B21D26/045 , B21D26/049
Abstract: A method and device for manufacturing a large-sized thin-walled tubular part by gas-liquid internal high pressure forming (IHPF). A gas and a liquid are filled at a certain volume ratio into a thin-walled blank. The pressure of the gas-liquid mixed fluid is mainly determined by the gas pressure. During the deformation of the thin-walled blank, due to a large compression ratio of the gas, the gas-liquid pressure will not basically change with the change of the volume of a blank cavity. A support pressure on the cavity of the thin-walled blank is stable in the entire forming process. In addition, even if there is a slight leakage of the liquid or gas during the forming process, the medium pressure inside the blank will not fluctuate largely. In this way, embodiments lower the requirements for the sealing effect during the tubular part forming process.
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134.发明申请公开(公告)号：US20210148114A1
公开(公告)日：2021-05-20
申请号：US16968782
申请日：2019-09-20
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Xing FU , Hongnan LI , Wenlong DU , Xifeng ZHONG
Abstract: A self-resetting tuned mass damper is based on eddy current and shape memory alloy technology. The self-resetting tuned mass damper comprises a hollow box, a cover plate, a bolt, a mass block, gears a, gears b, gears c, copper sheets, permanent magnet groups, partition boards, balls, pins, levers, shape memory alloys, rotating shafts a, rotating shafts b, a supporting plate and rotating shafts c. The movement of the mass block causes the copper sheets to rotate and generate eddy current for energy consumption. The copper sheets are rotated and amplified by adjusting the sizes of the gears. The displacement of a small mass block can cause rotation of the copper sheets by a large angle, which greatly increases energy consumption efficiency. The elongation of the shape memory alloys is amplified by adjusting the ratio of long and short force arms of the levers.
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公开(公告)号：US11003738B2
公开(公告)日：2021-05-11
申请号：US16090911
申请日：2018-02-12
Applicant: Dalian University of Technology
Inventor： Tinghua Yi , Haibin Huang , Hongnan Li
Abstract: The present invention belongs to the technical field of health monitoring for civil structures, and a dynamically non-Gaussian anomaly identification method is proposed for structural monitoring data. First, define past and current observation vectors for the monitoring data and pre-whiten them; second, establish a statistical correlation model for the whitened past and current observation vectors to obtain dynamically whitened data; then, divide the dynamically whitened data into two parts, i.e., the system-related and system-unrelated parts, which are further modelled by the independent component analysis; finally, define two statistics and determine their corresponding control limits, respectively, it can be decided that there is anomaly in the monitoring data when each of the statistics exceeds its corresponding control limit. The non-Gaussian and dynamic characteristics of structural monitoring data are simultaneously taken into account, based on that the defined statistics can effectively identify anomalies in the data.
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Patent Agency Ranking
公开(公告)号：US20210116404A1
公开(公告)日：2021-04-22
申请号：US17061536
申请日：2020-10-01
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhenyu ZHANG , Qun ZHANG , Quan SHI
Abstract: The present invention discloses a multi-screen supporting device in a high-temperature adiabatic calorimeter, and belongs to a calorimeter device in calorimetry. The multi-screen supporting device comprises a vacuum tank, three layers of protecting screens, two layers of thermal insulation screens, a protecting screen supporter for supporting and fixing the protecting screens, a thermal insulation screen supporter for supporting and fixing the thermal insulation screens, and a connecting piece for connecting and fixing the protecting screen supporter and the thermal insulation screen supporter. The multi-screen supporting mode in the high-temperature calorimeter solves the problems of time consumption for disassembling and assembling, low multi-screen assembling coaxiality and reduced experimental repeatability caused by many parts moved in each disassembling and assembling in the existing high-temperature calorimeter. The multi-screen supporting mode is easy in part processing, high in disassembling and assembling efficiency and convenient in operation, and effectively improves the experimental repeatability.
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公开(公告)号：US20210108986A1
公开(公告)日：2021-04-15
申请号：US17044773
申请日：2019-08-09
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Guiyong ZHANG , Yuyan JIANG , Zhi ZONG , Zhe SUN , Hao WANG , Biye YANG , Zhihong YIN , Ning LIU
Abstract: The present disclosure discloses a method of ship ice resistance model experiment based on non-refrigerated model ice, including the following steps: determining the overall length L1, breadth B and scale ratio λ of a selected ship model; determining the size A1 of an experimental area for placing broken ice in the ship ice resistance model experiment; determining the characteristic length of model ice; determining the quantitative proportion of the model ice for each size under the target coverage ratio c of the model; obtaining the number of the model ice for each size under the target coverage ratio according to the quantitative proportion of the model ice for each size under the target coverage ratio c and the total area A2 of the model ice; determining the geometrical shape and parameters of each size under the target coverage ratio c of the model ice. The present disclosure solves the problems of poor economy and poor operability in a freezing model ice experiment of an ice basin, and provides a design method for carrying out a ship ice resistance model experiment in a towing tank.
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公开(公告)号：US20210107109A1
公开(公告)日：2021-04-15
申请号：US17023012
申请日：2020-09-16
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Fuji WANG , Jianbo YAN , Meng ZHAO , Boyu ZHANG , Rao FU , Wei LIU , Jianwei MA , Zhenyuan JIA
IPC: B24B3/32
Abstract: A method for machining a drill with tilting blade slot structures for composite machining is provided. In the machining method, a face of the drill produces a downward component force for the inlet material to inhibit the inlet material from turning up; and a cutting edge inclination of an end surface at an outer turning point in a corner region of the drill is a positive value. The face and a flank are firstly partially ground in the corner region of the drill. The face at the outer turning point is ground with a grinding wheel to obtain two tilting blade slot structures. After grinding, a new face and a new cutting edge are obtained; and the cutting edge inclination on the end surface formed by the new cutting edge and a reference plane is a positive angle.
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公开(公告)号：US10976146B2
公开(公告)日：2021-04-13
申请号：US16321315
申请日：2017-05-03
Applicant: Dalian University of Technology
Inventor： Qingchao Sun , Jue Wang , Xin Liu , Wei Sun , Yingjie Jiang , Jiaqi Suo
Abstract: Disclosed is a system for shape error in-situ measurement of large-scale torus, which comprises an attitude adjusting part, a rotating part and a measuring part. The attitude adjusting part comprises an attitude adjusting platform, an attitude adjusting platform motor and an adapter panel, wherein the attitude adjusting platform can adjust the rotation angles along z-axis and x-axis, the angle adjusted is controlled by the attitude adjusting platform motor, and the attitude adjusting part is connected with the rotating part through the adapter panel; the rotating part comprises a rotating index plate base and a high-precision rotating index plate which is released from fixation by a lever for rotating, rotated manually for a required angle, and then fixed again by restoring the lever; the measuring part comprises a sensor clamp, sensor holders, contact sensors and associated equipment, wherein the sensor clamp is positioned with the rotating index plate by a mandrel and then fixed by two bolts and nuts; and the sensor clamp has four groups of sensor jacks in total, with at least three jacks in each group, and a sensor holder is installed in each sensor jack and used for fixing each sensor.
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公开(公告)号：US10974442B2
公开(公告)日：2021-04-13
申请号：US16303556
申请日：2018-02-05
Applicant: Dalian University of Technology
Inventor： Dazhi Wang , Kai Li , Tongqun Ren , Junsheng Liang
IPC: B29C64/112 , B33Y10/00 , B33Y30/00 , B33Y50/02 , B29C64/295 , B29C64/209 , B29C64/393 , B29C64/227 , B81C1/00
Abstract: The present invention belongs to the field of advanced manufacturing technology and relates to one set-up and method of electrohydrodynamic jet 3D printing based on resultant effect of electric field and thermal field. This method is used to fabricate micro/nano 3D structure, under the resultant effects of electro hydrodynamic force and thermal field. First of all, the ink reaches needle orifice at a constant speed under the resultant effect of fluid field and gravity field. Then a high voltage electric field is applied between needle and substrate. And the ink is dragged to form stable micro/nano scale jet which is far smaller than the needle size using the electric field shear force generated at needle orifice. The solvent evaporation rate of ink increases combined with the radiation of thermal field at the same time. Finally, the micro/nano scale 3D structure is fabricated on substrate with the accumulation of jet layer by layer. Compared with liquid jet printing technology, this method describing in present invention owns many advantages, including wide adaptability of material and manufacturing complex micro/nano scale 3D structures.
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