Special Issue / Special Column

Interfacial microstructure and mechanical properties of TiB

CAI Xiaoqiang, WANG Dongpo, WANG Ying, YANG Zhenwen

doi:10.7527/S1000-6893.2021.25006

2022, (2): 625006-625006.

Abstract

Ti-Ni brazing alloy is successfully used to braze the TiB2-TiC-SiC (TTS) composite ceramic. The influence of change in Ti-Ni brazing alloy composition and brazing time on the interface microstructure ...

Interface microstructure and formation mechanism of oscillating laser brazed ...

LI Haoyue¹, LIU Yongjiang³, ZHAO Zhenxing³, LI Xueran³, JIANG Junjun², WU Laijun^1,2, TAN Caiwang^1,2, SONG Xiaoguo^1,2

doi:10.7527/S1000-6893.2020.25020

2022, (2): 625020-625020.

Abstract

The sensing element is the core component of the avionics sensing system, and the pin of the element is often needed to be welded to wires when in use. To further improve the stability and reliability...

Effect of adding boron element on microstructure and shear strength of Ni-25a...

LI Xiaopeng¹, HAN Rui¹, QIAN Xusheng¹, ZHANG Binggang², WANG Kehong¹

doi:10.7527/S1000-6893.2021.25069

2022, (2): 625069-625069.

Abstract

The Ti-Zr-Ni-Cu amorphous brazing filler metal with added boron element was used to braze high temperature titanium alloy and self eutectic silicon nickel alloy, and the effects of boron element conte...

Microstructure and mechanical properties of Hastelloy N superalloy joints bra...

LU Chuanyang^1,2, CHEN Gangqiang¹, TANG Xiatao³, HE Yanming¹, YANG Jianguo¹, ZHENG Wenjian¹, MA Yinghe¹, LI Huaxin¹, GAO Zengliang¹

doi:10.7527/S1000-6893.2021.25040

2022, (2): 625040-625040.

Abstract

A high-quality Hastelloy N alloy brazed joint is achieved using boron-free BNi71CrSi filler alloy. The microstructure and composition of Hastelloy N alloy joints brazed at different brazing temperatur...

Finite element analysis of fatigue crack growth of linear friction welded sup...

YANG Xiawei¹, PENG Chong¹, MA Tiejun¹, WEN Guodong², WANG Yanying¹, CHAI Xiaoxia¹, XU Yaxin¹, LI Wenya¹

doi:10.7527/S1000-6893.2021.25004

2022, (2): 625004-625004.

Abstract

To characterize the fatigue crack initiation and growth of linear friction welded superalloy joints in the fatigue environment and reveal the effect of crack growth on joint failure, this study invest...

Vortex- friction stir welding process based on internal friction between iden...

LIU Xiaochao^1,2, ZHEN Yunqian², HE Xinyuan², CHEN Haiyan², SHEN Zhikang²

doi:10.7527/S1000-6893.2021.25012

2022, (2): 625012-625012.

Abstract

Vortex- Friction Stir Welding (VFSW) is a newly proposed modified process, which uses a stir bar made by the material identical with the workpiece and a non-consumable holder as the friction stir tool...

Mechanical performance of friction self-piercing riveted joint for 2A12-T4 al...

YANG Bingxin¹, MA Yunwu¹, SHAN He¹, YANG Tianhao², SUN Jing², LI Yongbing¹

doi:10.7527/S1000-6893.2021.25111

2022, (2): 625111-625111.

Abstract

To solve the problem of low joining efficiency caused by the prefabricated hole process in interference fit riveting, the friction self-piercing riveting (F-SPR) process is adopted. By using the frict...

Microstructure characteristics of Ti/Al lap joints with pinless friction stir...

LIU Hao, CHEN Yuhua, ZHANG Wentao

doi:10.7527/S1000-6893.2020.24680

2022, (2): 624680-624680.

Abstract

The dissimilar metals of Ti6Al4V titanium alloy and 2A12 aluminum alloy were joined by pinless friction stir lap spot welding. After welding, the low melting point aluminum alloy was melted by frictio...

Hybrid welding of riveting/friction stir lap joining of aluminum alloy to res...

JIANG Chunyang^1,2, WU Lihui², CHANG Yunlong¹, XUE Peng², NI Dingrui², XIAO Bolv², MA Zongyi²

doi:10.7527/S1000-6893.2021.25190

2022, (2): 625190-625190.

Abstract

Lightweight has become a significant development direction in aerospace, rail transportation and other fields because of its advantages in such as reducing fuel consumption, improving efficiency and r...

Effect of laser textured dual-scale structure on microstructure and mechanica...

XU Mengjia, LIU Bosheng, BI Xiaoyang, WANG Zhenmin

doi:10.7527/S1000-6893.2020.24620

2022, (2): 624620-624620.

Abstract

Non-polarity of the PEEK matrix makes it difficult to directly join metal and the carbon-fiber-reinforced-PEEK by friction lap joining. Laser surface texturing is proposed to assist the friction lap j...

Performance analysis of carbon fiber reinforced thermalsetting composite-tita...

ZOU Qi^1,2, YE Yiyun², JIAO Junke³, WU Zhisheng¹, XU Zifa², ZHANG Wenwu^2,4

doi:10.7527/S1000-6893.2022.25037

2022, (2): 625037-625037.

Abstract

Carbon Fiber Reinforced Thermalsetting (CFRTS) composites and TC4 titanium alloy have high specific strength and rigidity and have obvious lightweight effect, and are widely used in aerospace and new ...

Acoustic-electric characteristics and process of ultrasonic-arc MIG welding o...

LI Hongliang¹, CUI Zhanxiang¹, LIU Shixiong¹, MA Qiang¹, YAO Yiqiang², LEI Yucheng¹

doi:10.7527/S1000-6893.2021.24969

2022, (2): 624969-624969.

Abstract

The arc-ultrasonic welding technology is an effective method to refine the weld grain and improve the mechanical properties of joints. To study the excitation and function mechanism of ultrasonic in t...

Microstructure and properties of welding-rolling composite forming for 6061-T...

SONG Gang^1,2, LIU Zhenfu^1,2, CHENG Jiwen^1,2, LIU Liming^1,2

doi:10.7527/S1000-6893.2021.25880

2022, (2): 625880-625880.

Abstract

Aiming at the problem that the mechanical properties of 6061-T6 heat-treat aluminum alloy are seriously decreased after welding due to "joint softening", the laser-induced arc filler wire welding and ...

Future wireless communication assisted by intelligent reflecting surface: Sta...

ZHU Zhengyu^1,2, WANG Zixuan^1,3, XU Jinlei², WANG Zhongyong^1,2, WANG Ning¹, HAO Wanming¹

doi:10.7527/S1000-6893.2021.25014

2022, (2): 25014-025014.

Abstract

With the further development of related research on metamaterials and metasurfaces, the concept of Intelligent Reflecting Surface (IRS) was proposed. IRS uses a large number of passive reflective elem...

A method for separation of monopole and dipole sources based on phased microp...

ZHOU Wei¹, YANG Mingsui², MA Wei^3,4

doi:10.7527/S1000-6893.2020.24901

2022, (2): 124901-124901.

Abstract

As an acoustic field visualization technology, beamforming based on the monopole assumption has been widely applied in identifying acoustic sources. However, in practical engineering applications, com...

Numerical errors of high-order WENO schemes under specific conditions

LIU Jun, HAN Fang, WEI Yanxin

doi:10.7527/S1000-6893.2021.24940

2022, (2): 124940-124940.

Abstract

This paper compares the numerical results obtained from simulation of moving shock discontinuity, contact discontinuity, uniform flow in the curvilinear coordinate system and shock regular reflection ...

Experimental research on characteristics of pressure and heat flux fluctuatio...

LI Qiang¹, WAN Bingbing¹, YANG Kai², ZHU Tao²

doi:10.7527/S1000-6893.2020.24956

2022, (2): 124956-124956.

Abstract

High-frequency heat flux fluctuation is important in shock tunnel tests for experimental investigation of hypersonic boundary layer transition. A cone model is applied to test the self-innovated Atomi...

Influence of labyrinth seal volume packing effect on transient characteristic...

WANG Lei¹, MAO Junkui^1,2, WANG Longfei¹, PAN Jin¹, QIU Changbo³, YE Dahai³, CAI Kexin¹

doi:10.7527/S1000-6893.2021.24989

2022, (2): 124989-124989.

Abstract

To investigate the transient response of the air system in aero-engine, transient calculation analysis of the air system is carried out considering the volume packing effect of labyrinth seals in a mu...

Effect of dihedral wings on hypersonic performance of double swept waverider

MENG Xufei, BAI Peng, LI Dun, WANG Rong, LIU Chuanzhen

doi:10.7527/S1000-6893.2020.24998

2022, (2): 124998-124998.

Abstract

The waverider design with a given 3D leading edge is developed from the osculating-cone treatment, and customizing the leading edge curves generates double swept waveriders with dihedral and anhedral ...

Simulation of two-phase filling characteristics of storable propellant in pip...

REN Xiaowen¹, LI Ping², CHEN Hongyu¹, ZHOU Chenchu¹

doi:10.7527/S1000-6893.2021.25047

2022, (2): 125047-125047.

Abstract

The two-phase filling characteristics of the storable propellant in the pipeline are difficult to predict due to the interaction of gas and liquid. To expand the simulation capabilities of the modular...

Flight trip fuel volume prediction based on random forest with adjustment to ...

WU Zixuan¹, ZHANG Ning¹, GAO Kaiye^2,3, PENG Rui⁴

doi:10.7527/S1000-6893.2021.24933

2022, (2): 224933-224933.

Abstract

Aviation fuel cost is one of the most important cost expenditures for airline companies, exerting huge impact on the profit margin. Trip fuel accounts for the highest proportion of aviation fuel; ther...

Optimization of active vibration damping structure for transonic wind tunnel ...

ZENG Kaichun¹, KOU Xiping^1,2, YANG Xinghua¹, YU Li¹, ZHA Jun¹

doi:10.7527/S1000-6893.2021.24944

2022, (2): 224944-224944.

Abstract

To solve the vibration problem of the model support system in high-speed wind tunnel tests, we embed piezoelectric stack actuators into the sting to form an integrated active vibration damping structu...

Performance improvement of variable speed tail rotors by passively extendable...

WAN Haoyun, HAN Dong, ZHANG Yuhang

doi:10.7527/S1000-6893.2021.24981

2022, (2): 224981-224981.

Abstract

To study the performance improvement potential of variable speed tail rotors by the passively extendable chord, we establish a helicopter flight performance analysis model, including a comprehensive r...

UAV communication coverage model based on pheromone map

REN Shaorui¹, LU Zhongmei^1,2, SHI Yuanming³, LI Lixin⁴, CHEN Wei¹

doi:10.7527/S1000-6893.2021.24939

2022, (2): 324939-324939.

Abstract

Due to the high flexibility and good coverage capability of UAV, it is popular to choose multi-UAV for efficient communication coverage in practical applications. However, the requirements for the mul...

A smeared spectrum interference suppression method based on twinwaveform desi...

LIU Zhidong¹, ZHANG Qun^1,2, LUO Ying^1,2, LI Rui¹

doi:10.7527/S1000-6893.2020.24947

2022, (2): 324947-324947.

Abstract

The SMeared SPectrum (SMSP) jamming is an effective jamming method against Linear Frequency Modulation (LFM) pulse compression radar. Based on the time-frequency characteristics of the jamming signal,...

Simulation on antenna servo control system based on DUEA

LI Ning^1,2, LIU Zhiyong¹, WANG Na¹, YANG Lei^1,2

doi:10.7527/S1000-6893.2021.24986

2022, (2): 324986-324986.

Abstract

The large aperture radio telescope is vulnerable to exogenous disturbances such as gusts,systemic uncertainties, and difficulty in achieving high pointing accuracy. To realize the high-performance obj...

Predefined-time attitude stabilization control of receiver aircraft

WU Cihang¹, YAN Jianguo¹, QIAN Xianyun², GUO Yiming¹, QU Yaohong¹

doi:10.7527/S1000-6893.2021.24996

2022, (2): 324996-324996.

Abstract

Considering the time-varying rotational inertia, uncertain rotational inertia and wind disturbance of the receiver aircraft, a predefined-time attitude stabilization control strategy for the receiver ...

Prescribed performance control for morphing aerospace vehicle under mismatche...

LI Xinkai¹, ZHANG Hongli¹, FAN Wenhui²

doi:10.7527/S1000-6893.2020.25008

2022, (2): 325008-325008.

Abstract

The semi-tilt-rotor morphing aerospace vehicle is susceptible to mismatched disturbances and subject to performance constraints. To overcome these problems, a mismatched/matched disturbance observer b...

Fast guidance law identification approach for incoming missile based on GRU n...

WANG Yinhan¹, FAN Shipeng¹, WU Guang², WANG Jiang¹, HE Shaoming¹

doi:10.7527/S1000-6893.2021.25024

2022, (2): 325024-325024.

Abstract

To identify the guidance law of enemy interceptor missile, a fast guidance law identification method is proposed based on the Gate Recurrent Unit (GRU). A model for the relative motion of the intercep...

Dynamic-priority-decoupled UAV swarm trajectory planning using distributed se...

XU Guangtong^1,2, WANG Zhu³, CAO Yan^1,2, SUN Jingliang^1,2, LONG Teng^1,2

doi:10.7527/S1000-6893.2021.25059

2022, (2): 325059-325059.

Abstract

In this paper, a Dynamic-Priority-Decoupled Sequential Convex Programming method (DPD-SCP) is proposed to alleviate the high-computational complexity burden for UAV swarm trajectory planning caused by...

Anti-blind estimation transmission method for chaotic DSSS signals

LIU Fang, CHENG Mowen, CHEN Lizhi

doi:10.7527/S1000-6893.2021.25108

2022, (2): 325108-325108.

Abstract

The chaotic Direct Sequence Spread Spectrum (DSSS) has become a research focus in the communication field because of its high capacity, low interception rate and excellent security in the physical lay...

Coordinated stabilization control for dual-arm space robot capturing a non-co...

XIA Pengcheng^1,2, LUO Jianjun^1,2, WANG Mingming^1,2, TAN Longyu³

doi:10.7527/S1000-6893.2021.25398

2022, (2): 325398-325398.

Abstract

Due to the uncertain target inertia parameters and the internal stress at grasping points, excessive contact wrenches may be applied to the target at grasping points during the stabilization of the no...

Research progress on dissimilar materials joining

FENG Jicai

doi:10.7527/S1000-6893.2021.26413

2022, (2): 626413-626413.

Abstract

Dissimilar material structures could realize the combination of dissimilar materials with excellent performance, which improves the flexibility in design and production and meets the demand for functi...

Research progress in steel/Al-alloys dissimilar metals spot welding

XIE Zehao, LI Jianyu, CHEN Shuhai, HUANG Jihua, YANG Jian

doi:10.7527/S1000-6893.2021.25118

2022, (2): 625118-625118.

Abstract

Hybrid structures of Steel/Al-alloys dissimilar metals have wide applications in fields of aircraft, aerospace and vehicle body industries because of their lightweight and excellent structural propert...

Contribution evaluation of aviation armament system-of-systems based on opera...

ZHOU Chen, SHANG Bolin, SONG Bifeng, KE Erqin, WANG Yaozu

doi:10.7527/S1000-6893.2020.24958

2022, (2): 224958-224958.

Abstract

The operation loop method is improved and introduced into the solution to the evaluation problem of the effectiveness and equipment contribution rate of high confrontation armament system-of-systems i...

A novel algorithm for reference signal purification in non-cooperative passiv...

YING Tao¹, WANG Xuebao², TIAN Wei¹, ZHOU Cheng¹, HOU Xiaoyang¹

doi:10.7527/S1000-6893.2021.25025

2022, (2): 325025-325025.

Abstract

The non-cooperative passive detection system obtains the reference signal by purifying the direct-path signal, and the purity of the reference signal will make a difference to the performance of targe...