bluuebunny/crossref_metadata_2025_split huggingface dataset:
General compensation control method of flexible manipulator driven by tendon-sheath mechanism
Authors: Zhang Cunxiang 
Published: November 2022

Abstract
Flexible manipulator has been widely used because of its flexibility. In addition, the tendon-sheath mechanism has the advantages of compact structure and strong flexibility, and it can be used as the driving transmission mode of the flexible manipulator. However, the nonlinear and hysteretic characteristics of the tendon-sheath mechanism directly affect the motion accuracy of the manipulator. Firstly, the kinematic and static models of the flexible manipulator are analyzed considering the influence of multi section coupling. In addition, the mechanical transmission process of the tendon-sheath mechanism is analyzed. On this basis, a general feedforward compensation method for the flexible manipulator is established. The proposed model-based compensation control method can be applied to all flexible manipulators, and it is of great significance to promote the practical application of the manipulator.
Design and optimization of booster gliding model guided rocket scheme
Authors: Zhang Yifan , Zhao Meng , Tao Zhengxin , Mao Wabu , Luo Shijin , Bai Xibin , Peng Ke 
Published: November 2022

Abstract
In order to meet the needs of rocket innovation practice learning that takes into account both low-cost and high-level engineering practical training, the design of flight mission of the model guided rocket is proposed and the technical index analysis is carried out in the present study. The design of the rocket thrust system is completed using two paralleled YSR-32 motor, whose total engine impulse is 296.14𝑵 ∙ 𝒔; The mathematical model of the integrated aerodynamic / ballistic design optimization problem of rocket is constructed, adopting the aerodynamic configuration of side strip wing and x-shaped tail rudder and using Boost-Glide trajectory. Take the farthest range as the objective function, the influence of 8 variables on it is analyzed; By using Astrolab, a rapid overall design optimization platform of the rocket, the integrated simulation process of the aerodynamic / ballistic performance of the rocket is established; The maximum range of the optimization results is 1.29 𝒌𝒎, the takeoff mass is 2.8 𝒌𝒈, the speed at the shutdown point is 93.6 𝒎/𝒔, and the maximum flight time is 28.4s; The single use cost of the guided rocket is not exceed 1300 yuan.
Active vibration control of a piezoelectric composite laminate
Authors: Chen Hongxia , Liu Wenguang 
Published: November 2022

AbstractAn active vibration control method of the piezoelectric composite laminated plate under the external disturbance is studied. Firstly, the dynamic model of the piezoelectric composite laminated plate is derived based on the classical laminated plate theory and the Hamilton's principle. And subsequently, a sliding mode observer is developed for the external disturbance, and the stability of the observer is verified by the Lyapunov equation, and also the LQR controller is designed based on the observed state. The particle swarm algorithm is adapted to optimize the weighting matrix. In the end, the impacts of the geometric parameters and the stacking sequences on the dynamic behavior of the piezoelectric composite material plate is analyzed. Results indicate that the sliding mode observer can accurately track the original state, and the vibration of the piezoelectric composite material plate can be suppressed effectively by the LQR control based on the particle swarm
Dynamic Response Analysis of the Aircraft Exposed to the Lateral Travelling Gust
Authors: Jing Zhiwei , Tang Chu 
Published: November 2022

Abstract
The travelling gust from detonation is an interesting and severe excitation for a flying aircraft, and it is characterized by high emanating speed and takes strong energy. Previous investigations on the dynamic response characteristics of the aircraft in the tail-on or head-on travelling gust have been carried out. This paper focuses on the lateral travelling gust and its influence on the dynamic response of the aircraft. Based on conventional flight dynamics equations, the dynamics modelling and simulation technique of the rigid aircraft exposed to the lateral travelling gust is established. By employing the static pressure distributions, one quasi-steady aerodynamics computation method is presented to determine the aerodynamic force and moment on the aircraft in the travelling gust. Simulation results show that the approach presented in this paper is effective and can deal with the engineering requirement. Results also indicate that the enveloping process of the travelling gust increases the aerodynamic moment of the x-axis significantly and subsequently influences the dynamic responses along the x-axis.
Design and Analysis of the Wing Functioning as a Ramp for a Spitfire Flight Simulator
Authors: Zhang Yichong 
Published: November 2022

Abstract
This paper designed and analysed the wing for a Spitfire Mk9 Flight Simulator using three-dimensional modeling, finite element analysis and fatigue analysis methodologies with 3D EXPERIENCE, ABAQUS/FE-SAFE software. The results demonstrated that by using the wing structure as the access ramp to the cockpit simulator, the accessibility, safety and structural integrity could be improved vastly in comparison with the existing Spitfire flight simulators.
Advances in Resilience Engineering for Air Traffic Management Applications
Authors: Yi Jianmin , Ma Cunbao , Zhao Jin 
Published: November 2022

Abstract
As an emerging safety perspective, resilience engineering is attracting increasingly attentions in aerospace industry. Numerous researches have been carried out to explore ATM resilience properties from different aspects. Nevertheless, there appear to be significant variations on the research objects, issues concerned, methods employed and indexes used. As far as we know, there seems to be an absence of a dedicated literature review to explore the application status of resilience in ATM area. To this end, our work is concentrated on the research situation and progress of resilience in ATM. A wide range of databases are retrieved to obtain an extensive coverage of the literature. Subsequently, the research works are reviewed on the basis of different classifications followed by a brief introduction of related findings and implications. Attempting to provide some reference for further studies, promising directions are pointed out in view of the challenges and requirements. It is desired that this work may throw some light on further explorations of ATM resilience.
Simulation of Combustion Performance of High Salinity Organic Waste Liquid Incinerator
Authors: Li Wen-Kai , Qian yong-kang , Qian Xin-yu 
Published: November 2022

Abstract
High-salinity organic waste liquid is one of the important industrial pollution sources and the main by-product of petrochemical enterprises in China. Incineration is the mainstream technology for treating this kind of waste liquid. A three-dimensional numerical simulation of a practical 18t/h waste liquid incinerator was carried out using Fluent. The velocity, temperature, component concentration and particle trajectory distribution in the incinerator were obtained, proposing a corresponding incinerator performance optimization scheme according to the simulation results. The results demonstrate that the numerical combustion model established in this paper can accurately simulate the distribution of flow, combustion and heat transfer in the incinerator, verifying the reliability of the numerical model; The overall temperature and flow field organization of this type of waste liquid incinerator is relatively reasonable, with heat exchange reported only in the flue corner and some heat exchange surfaces. The flow field and temperature field distribution in the incinerator can be effectively modified so as to improve the boiler operation and maintenance cycle by optimizing the corner flow line and furnace structure.
Comparative study on the performance of turbulence models in flow separation of large expansion ratio nozzle
Authors: Wang Le , Tian Zhengyu , Yu Hang , Zhang Ye , Li Hua 
Published: November 2022

Abstract
The asymmetry of flow separation inside the nozzle with large expansion ratio is the main factor for the generation of side-load in the engine, so the accurate prediction of the flow separation is of great significance. The turbulence model is the key to the prediction, but in different scenarios, the performance of the turbulence model can introduce huge uncertainties. In this paper, a typical thrust-optimized nozzle (VOLVO-S1) is simulated and analyzed for three widely used turbulence models: SST

k - ω 、
RNG k - ε
and Spalart-Allmaras model. The results show that all these models can effectively predict the mode of shock separation phenomenon. The comprehensive performance of SST k - ω
is the best; The Spalart-Allmaras model has better prediction performance under low pressure ratio, and the RNG k - ε
model has better prediction effect under high pressure ratio.
Design of mini airborne emergency power supply based on super capacitor
Authors: Li Jian , Li Guoxing , Guo Yonglin 
Published: November 2022

Abstract
In order to solve the problem that it is difficult to install emergency battery with limited space on some flight planes, a micro emergency power supply based on super capacitor was designed in combination with the good energy storage characteristics of super capacitor. The selection calculation of capacitor and the design process of main control module and charge and discharge module are discussed in detail. In the laboratory environment, a small airborne test system was built to carry out verification experiments. The results show that the device meets the basic requirements of the system for backup power supply, and has the advantage of taking up less space and avoiding maintenance, which provides a new choice for the backup power supply selection of the future in-flight test system.
Overall design and sensitivity analysis of solar aircraft based on feasible region planning method
Authors: Zhang Liang , Ma Dongli , Yang Muqing , Yao Yuan 
Published: November 2022

Abstract
Solar aircraft has the ability of 24-hour uninterrupted cruise, so it has become a research hotspot all over the world. The existing overall design method of solar aircraft generally obtains the design scheme through the iterative operation of the balance equations. However, the overall parameters satisfying the boundary conditions are not unique, but distributed in a specific interval. This paper presents a method to construct the radial feasible region of the overall parameters based on the balance equations, and studies the sensitivity of the feasible region to the task indicators and performance indicators respectively, which provides suggestions for the optimization direction of the subsystem in the overall design stage. Finally, based on the above methods and research conclusions, the design scheme of a 15m wingspan solar aircraft is introduced. This paper provides an intuitive overall design method for solar aircraft, and offers scientific basis for multidisciplinary collaborative optimization.
Bearing capacity analysis of large deflection thin plate for civil aircraft
Authors: Zhang Kaiwen , He Zhouli , Huang Longhui 
Published: November 2022

Abstract
At present, the analysis of thin plate structure with small deflection and linear deformation is very mature, but the thin plate structure with large deflection and nonlinear deformation is often used in practical engineering design. Aiming at the thin plate structure with large deflection under out of plane load, this paper studies the bearing capacity of thin plate structure with large deflection under out of plane load by combining theoretical analysis, finite element simulation analysis and experimental analysis. According to the research, it is found that the process of theoretical analysis is complex and the workload and difficulty are too large. In practical engineering, some analysis results can be obtained quickly by using empirical formula and looking up the chart, but the application scope of these analysis results is small, and only the local stress results can be obtained. At present, designers usually use finite element simulation analysis to get the stress distribution of the whole structure. It should be noted that the geometric nonlinearity must be considered in the finite element analysis. The simulation results can provide a certain reference for engineering research and can be applied in practical engineering.
A New Design of the 3D Deployable Solar Array in the Aerospace Field and Kinematic Analysis during Deployment
Authors: Sun Jiayi 
Published: November 2022

Abstract
The paper focuses on a new design of the 3D deployable solar array for spacecraft and landers. Compared with existing solar array designs, the main advantage of this new design is the further increase in the area of the solar array. The principles of spatial rings and domes are used for this new design. This design consists of a large dome and four smaller rings. The model is constructed using Solidworks, and different configurations during the deployment are shown. The kinematic analysis shows that the length ratios of elements are independent of the input angle θ. It proves that this deployable structure has only one mobility. The configuration can be determined by a specific input angle. When the input angle θ increases, the top-view area of the structure increases, while the maximum height of the structure decreases. The volume of the increases and then decreases with the increasing θ. The maximum volume occurs at θ = 110°. In addition, the shape of the top-view geometry for a particular design is determined by two design parameters. It is found that the length ratios of elements increase with the increasing value of two design parameters.
Numerical simulation of jet atomization process of swirl nozzle
Authors: Gao Na , Zhang Xiaobin 
Published: November 2022

Abstract
As the initial conditions of evaporative combustion, the jet atomization formed by the swirl nozzle has the characteristics of large distribution space and small atomization particle size, which is very important for the study of the jet atomization of the swirl nozzle. In this paper, the cross-scale VTD model is used to comprehensively consider the actual situation of multi-scale and multi-phase flow coupling in the atomization process. The evolution process and the breaking shape of the rotating cone liquid film during the atomization and crushing process are studied. The results show that the complete broken shape formed by the rotating cone liquid film can be divided into three areas along the axial direction: continuous liquid film, primary crushing, and secondary crushing. Among them, the appearance of irregularly distributed small holes is a significant feature of primary crushing. The sign of secondary crushing is that the liquid filaments are broken into small-scale droplet particles; after the primary and secondary crushing, the fully developed cone-shaped liquid film will appear to move up the position of the primary crushing cavity and reduce the scope. At the same time, the initial position of the secondary crushing will move up.
Formation of H2CO and CH3OH in the Protoplanetary Disks
Authors: Xiao Lin , Liu Xia , Zhang Li 
Published: November 2022

Abstract
It is known that the complex organic molecules in planetary systems may be formed by the organic chemistry of gases and particles in protoplanetary disks. Among these molecules, H2CO and CH3OH are potential precursors of essential organic compounds like glycolaldehyde. We calculate the physical and chemical structures of the protoplanetary disks around LkCa 15 and MWC 480 stars, compare the obtained column densities with the observed values. Our results mostly show reasonable agreements with observations. We identify the formation of H2CO to be through the both gas-phase and dust surface reactions, while CH3OH is dominantly formed by surface chemistry in the original astrolabe and then released into the gas-phase by surface exothermic chemical reactions in the LkCa 15 disk. We studied the synthesis of complex organic molecules (NH2CHO and CH3OCHO) in the protoplanetary disk to predict the observable species and Molecular abundance. In the disks around LkCa 15 and MWC 480 stars, we suggest that the strong spectral line observation of NH2CHO belonging to band 4 may obtain good results with ALMA, the observation of CH3OCHO may be challenging.
According transformer parameters to design a high voltage power
Authors: Zhang Junling , Jin Renbo 
Published: November 2022

Abstract
When the load is empty pulse width modulation high frequency and high voltage power’ stabilization depth can easily cause oscillation, and when the full load of the voltage regulation is too shallow the voltage regulation effect is not good, the reason for this phenomenon is because the equivalent ratio and load correlation. The first thing you need to do is to find out why you can avoid the problem early in the design. To find out the cause, should to know the influence of the high voltage rectifier circuit on the total gain of the circuit and the dispersed parameters of the high frequency and high voltage transformer.
Dynamic load identification based on piecewise fitting trend term and smooth curve
Authors: Gao Wei , Ren Zhuoyu 
Published: November 2022

Abstract

wilson – θ back analysis method is a good load identification method. However, there are some problems, such as unsatisfactory load identification results caused by acceleration measurement errors. By deriving the recurrence formula of cumulative acceleration error of velocity and displacement, the different situations of displacement and velocity error are summarized. This paper introduces an algorithm for identifying the extreme points of trend items. The correction speed and displacement are modified by subsection fitting. The midpoint smoothing fitting of the load data after the initial identification is proposed which can better improve the accuracy of the load identification wilson – θ back analysis method. Finally, a simulation example shows that the displacement, velocity and the identified load error level are well controlled.
The Numerical Simulation of Cavitation Phenomenon in a Venturi Tube
Authors: Zhou Zibo , Li Qinglian , Liang Tao , Gong Shaotian 
Published: November 2022

Abstract
Venturi tubes are an important component of the liquid rocket engine to achieve extensive thrust regulation. On the basis of the existing venturi tube model, the relevant numerical simulation is carried out by the Mixture model and the k – ε turbulence model. Elaborated the typical cavitation flow field structure, cavitation area length and critical pressure ratio and analyzed the influence of outlet pressure on cavitation flow field in cavitation tubes. It was found that cavitation is always produced against the wall, and there is a core area of Cavitation. Cavitation in the core area is the most severe and the temperature is the lowest. From the core area outward, the gas phase area shows a patchy distribution, and there exists a gradient. Also, the critical pressure ratio that can produce cavitation is calculated. It is concluded that under the condition that cavitation can occur, the decrease of outlet pressure will lead to the lengthening of the cavitation area and the larger maximum temperature difference in the Venturi tube.
The principle and state-of-art applications of Hawking radiation
Authors: Guo Chunyu 
Published: November 2022

Abstract
Hawking radiation, firstly discovered in 1974 by Stephen Hawking, is a crucial quantum phenomenon, which proves that a black hole has been losing its mass since its formation. In this paper, the method of information retrieval and literature analysis are fully applied to introduce the principle and state-of-art applications of Hawking radiation. Three parameters used to describe the evaporation of black holes are analyzed. Furthermore, the tunnelling effect of entangled pairs near event horizon is described to explain Hawking radiation from a microscopic perspective. Then, the evaporating black holes are observed under wave optical conditions by the Fourier transformation of the spatial correlation function and detected in Laboratory condition by equivalenting entangled pairs to surface wave packets with sum-zero energy. Finally, a prediction is made that the widely used of extra-dimensional theory and high-energy particle technology as well as numerical researches in laboratory conditions will be strongly pushing the observation of Hawking radiation. Overall, these results shed light on further exploring the universe in terms of Hawking radiation.
Design of INS/GNSS Precise Posture Measurement and Positioning System for Complex System
Authors: Han Rong , Yang Jianfen , Tang Yumin , Yang Liben 
Published: November 2022

Abstract
In this paper, aiming at the robustness of the UAV control system and the accuracy of positioning and mapping in complex situations, the visual odometry is used as the front end of the positioning and mapping system, and the data of the IMU inertial sensor is fused on the basis of the monocular camera. The analysis completes the loosely coupled initialization process; the back-end constructs the cost function to realize the tightly coupled optimization, and uses the loop closure detection relocation and the four degree of freedom graph optimization to realize the nonlinear optimization. It is verified by simulation that the algorithm can improve the visual robustness in time when the UAV moves quickly or the scene has wrong results, so that the trajectory captured by the camera and the real-time construction map maintain global consistency, effectively eliminating the integral drift of the IMU, and correcting The noise of the IMU improves its positioning accuracy.
Habitability of Exoplanets around Black Hole
Authors: Hu Zhe , Jiang Qingyao , Li Miao 
Published: November 2022

Abstract
Contemporarily, investigation for habitability of exoplanets around black hole remains a hot topic. In this paper, the state-of-art experimental results relevant to the topic as well as the basic principles will be summarized. To be specific, basic information about black holes will be introduced first, including the 4 categories and detection method. Based on several observations for the effect of black hole towards near-by planets, this paper mainly focuses on the effect of black hole radiation and infrared echo on the habitability of exoplanets and the subsequent impact from radioactive power on biological features. These result shed light on guiding further study about relationship between exoplanets and black holes.
Experimental study on ignition and lean blowout characteristics of high temperature rise combustor
Authors: Luo Rui , Fu Yi , Jiang Jintao , Shi Pengyu , Liu Penghui , Wang Zhisheng , Fan Wei 
Published: November 2022

Abstract
Ignition and lean blowout characteristics are an important performance index of the Aeroengine combustor, which is directly related to the reliability of the whole engine. The ignition process of the combustor was filmed by a CCD camera, and three stages of successful ignition were obtained. By changing the intake conditions, the variation of the minimum ignition energy in the fuel-air ratio (FAR) is tested. With the decrease of the FAR, the minimum ignition energy increases and there is a sudden increase process. As the room temperature and pressure conditions, the lean blowout (LBO) FAR is roughly 0.014, and Increasing kerosene temperature can improve the LBO performance in the combustor.