检索结果-南通市图书馆

Progress in reentry trajectory planning for hypersonic vehicle

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2014年第4期25卷 627-639页

作者： Jiang Zhao Rui Zhou Xuelian Jin School of Automation Science and Electrical Engineering Beihang University Beijing Microelectronics Technology Institute

The reentry trajectory planning for hypersonic vehicles is critical and challenging in the presence of numerous nonlinear equations of motion and path constraints, as well as guaranteed satisfaction of accuracy in meeting all the specified boundary conditions. In the last ten years, many researchers have investigated various strategies to generate a feasible or optimal constrained reentry trajectory for hypersonic vehicles. This paper briefly reviews the new research efforts to promote the capability of reentry trajectory planning. The progress of the onboard reentry trajectory planning, reentry trajectory optimization, and landing footprint is summarized. The main challenges of reentry trajectory planning for hypersonic vehicles are analyzed, focusing on the rapid reentry trajectory optimization, complex geographic constraints, and coop- erative strategies.

关键词： hypersonic vehicle reentry trajectory planning on-board planning reentry trajectory optimization footprint.

Typical adaptive neural control for hypersonic vehicle based on higher-order filters

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2020年第5期31卷 1031-1040页

作者： ZHAO Hewei LI Rui Shore Guard Institute Naval Aviation UniversityYantai 264001China Wenjing College Yantai UniversityYantai 264005China

A typical adaptive neural control methodology is used for the rigid body model of the hypersonic vehicle. The rigid body model is divided into the altitude subsystem and the velocity subsystem. The proportional integral differential(PID) controller is introduced to control the velocity track. The backstepping design is applied for constructing the controllers for the altitude *** avoid the explosion of differentiation from backstepping, the higher-order filter dynamic is used for replacing the virtual controller in the backstepping design steps. In the design procedure,the radial basis function(RBF) neural network is investigated to approximate the unknown nonlinear functions in the system dynamic of the hypersonic vehicle. The simulations show the effectiveness of the design method.

关键词： hypersonic vehicle adaptive neural control higher-order filter differential explosion

Numerical and experimental investigation of aerodynamic heat control of leading edge of hypersonic vehicle's flexible skin

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2022年第10期65卷 211-224页

作者： Xiaozhou Lü Chao YUAN Weimin BAO Guanghui BAI Fancheng MENG School of Aerospace Science and Technology Xidian University Science and Technology on Space Physics Laboratory College of Materials Science and Engineering Chongqing University of Technology

In this paper, a flexible skin inspired by the sudoriferous gland structure of human skin is developed for ultra-thermal protection of hypersonic morphing vehicles. The effect of different coolants and cooling flow rates on the cooling performance of the leading edge is studied using finite element analysis.A wind tunnel experiment is conducted at high temperatures with the heat flux Q = 700 k W/m2, and the results indicate the following:(1) the flexible skin can effectively reduce the surface temperature of hypersonic vehicles;(2) when using liquid water instead of argon as the cooling medium, the cooling efficiency of flexible skin performs better;(3) when liquid water is used as the cooling medium, the cooling effect peaks at a flow rate of 0.01 m/s, and further increasing the flow rate will not benefit cooling efficiency significantly;(4) the flexible skin can withstand extreme thermal environments, demonstrating its feasibility in applications of over-limit thermal protection for hypersonic morphing vehicles. This study aims at optimizing the cooling performance of the flexible skin for ultra-thermal protection. The proposed skin can overcome the heat-resistance limit of flexible materials with morphing properties, laying a theoretical and experimental foundation for its future applications in hypersonic morphing vehicles.

关键词： hypersonic vehicle flexible skin ultra-thermal protection micro-channel transpiration cooling

同方期刊数据库

Control-Oriented Modeling and Simulation on Rigid-Aeroelasticity Coupling for hypersonic vehicle

在线全文

学校读者我要写书评

暂无评论

Transactions of Nanjing University of Aeronautics and Astronautics 2015年第1期32卷 70-80页

作者：肖莉萍张勇陆宇平 UAV Research Institute Nanjing University of Aeronautics and Astronautics School of Automation Engineering Nanjing University of Aeronautics and Astronautics

Since the subsystems of aerodynamics,propulsion,structure and so on in hypersonic vehicles involve characteristics of nonlinearity,strong coupling and uncertainty,and typical hypersonic vehicles adopt slender-body and wave-rider layout with widely-used lightweight materials,the accuracy of the modeling with a conventional rigid-body assumption is ***,a nonlinear mathematical longitudinal model of a hypersonic vehicle is established with its geometry provided to estimate aerodynamic force and thrust using hypersonic aerodynamics and quasi-one-dimensional flow with heat added and capture vehicle aeroelasticity using a single free-free Bernoulli-Euler beam *** the static and dynamic properties of the rigid and rigid-aeroelasticity coupling model are compared via theoretical analysis and numerical simulation under the given flight ***,a LQR controller for rigid model is designed and the comparable results are obtained to explain the aerolasticity influence on the control *** simulation results show that the aeroelasticity mode of slender-body hypersonic vehicles affects short period mode significantly and it cannot be simply neglected.

关键词： hypersonic vehicle wave-rider aeroelasticity modeling dynamic properties

Mahalanobis distance-based fading cubature Kalman filter with augmented mechanism for hypersonic vehicle INS/CNS autonomous integration

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2022年第5期35卷 114-128页

作者： Bingbing GAO Wenmin LI Gaoge HU Yongmin ZHONG Xinhe ZHU School of Automation Northwestern Polytechnical UniversityXi’an 710072China School of Engineering RMIT UniversityBundooraVIC 3083Australia

Inertial Navigation System/Celestial Navigation System(INS/CNS)integration,especially for the tightly-coupled mode,provides a promising autonomous tactics for hypersonic vehicle(HV)in military ***,INS/CNS integration is a challenging research task due to its special characteristics such as strong nonlinearity,non-additive noise and dynamic *** paper presents a novel nonlinear filtering method for INS/CNS integration by adopting the emerging Cubature Kalman Filter(CKF)to handle the strong INS error model nonlinearity caused by HV's high *** combines the state-augmentation technique into the nonlinear CKF to decrease the negative effect of non-additive noise in inertial ***,a technique for the detection of dynamic model uncertainty is developed,and the augmented CKF is modified with fading memory to tackle dynamic model uncertainty by rigorously deriving the fading factor via the theory of Mahalanobis distance without artificial *** results and comparison analysis prove that the proposed method can effectively curb the adverse impacts of non-additive noise and dynamic model uncertainty for inertial measurements,leading to improved performance for HV navigation with tightly-coupled INS/CNS integration.

关键词： Autonomous integration Fading factor hypersonic vehicle Inertial navigation systems Kalman filters Mahalanobis distance

Clutter suppression for hypersonic vehicle-borne radar with frequency diverse array

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2017年第3期28卷 481-492页

作者： Xuzi Wu Zheng Liu Rong Xie National Key Laboratory of Radar Signal Processing Xidian UniversityXi’an 710071China

The seriously range-ambiguous clutter is one of the main problems in clutter suppression for hypersonic vehicle-borne forward-looking radar. An approach based on the frequency diverse array (FDA) technique is proposed to mitigate the range ambiguous clutter. The frequency increment is designed to distinguish the clutter at ambiguous ranges and suppress the clutter by using a subspace projection algorithm. On the platform with high altitude or limited array antennas, the proposed method performs better for its independence of the elevation degrees-of-freedom (DOF). Finally, simulation results verify the effectiveness of the proposed method.

关键词： hypersonic vehicle forward-looking array radar clutter suppression frequency diverse array

Adaptive learning-based optimal tracking control system design and analysis of a disturbed nonlinear hypersonic vehicle model

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2024年第6期67卷 1893-1906页

作者： AN Kai WANG ZhenGuo HUANG Wei hypersonic Technology Laboratory National University of Defense TechnologyChangsha410073China

We propose an adaptive learning-based optimal control scheme for height-velocity control models considering model uncertainties and external disturbances of hypersonic winged-cone *** longitudinal nonlinear model is first established and transformed into the control-oriented error equations,and the control scheme is organized by a steady-compensation *** overcome and eliminate the impact of model uncertainties and external disturbances,an adaptive radial basis function neural network(RBFNN)is designed by a q-gradient *** the height-velocity error system with estimated uncertainties into account,the adaptive learning-based optimal tracking control(ALOTC)scheme is proposed by combining the critic-only adaptive dynamic programming(ADP)framework and parameter optimization of system settling ***,a novel weight update law is proposed to satisfy the online iteration requirements,and the algorithm convergence and closedloop stability are discussed by the Lyapunov ***,four simulation cases are provided to prove the effectiveness,accuracy,and robustness of the proposed scheme for the hypersonic longitudinal control system.

关键词： optimal tracking control adaptive dynamic programming RBFNN hypersonic vehicle

A power and thermal management system for long endurance hypersonic vehicle

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第2期36卷 29-40页

作者： Liang GUO Liping PANG Xiaodong YANG Jingquan ZHAO Desheng MA School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China Institute of Artificial Intelligence Beihang UniversityBeijing 100191China

Due to the pneumatic heating and combustion effect,the scramjet engine of hypersonic vehicle faces high temperature *** is necessary to comprehensively consider its thermal management and power generation together.A new Power and Thermal Management System(PTMS)combined with Supercritical Carbon Dioxide(SCO_(2))closed Brayton cycle and fuel vapor turbine is proposed and discussed in this *** new PTMS can meet the cooling requirement of hypersonic vehicle at Mach number 6–7,and avoid the coking and scrapping in the scramjet cooling *** with the PTMS only based on fuel vapor turbine,the new PTMS utilizes the waste heat of scramjet to generate more *** addition,it can reduce the use of fuel sink for cooling,and the additional weight penalty can be compensated for long endurance hypersonic flight.

关键词： Fuel vapor turbine hypersonic vehicle Power and thermal management system Scramjet Supercritical carbon dioxide

Reentry Attitude Tracking Control for hypersonic vehicle with Reaction Control Systems via Improved Model Predictive Control Approach

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2020年第1期122卷 131-148页

作者： Kai Liu Zheng Hou Zhiyong She Jian Guo 无 School of Aeronautics and Astronautics Dalian University of TechnologyDalian116024China Key Laboratory of Advanced Technology for Aerospace vehicles Dalian116024China Beijing Institute of Aerospace Technology Beijing100074China

This paper studies the reentry attitude tracking control problem for hypersonic vehicles(HSV)equipped with reaction control systems(RCS)and aerodynamic *** attitude dynamical model of the hypersonic vehicles is established,and the simplified longitudinal and lateral dynamic models are obtained,***,the compound control allocation strategy is provided and the model predictive controller is designed for the pitch ***,considering the complicated jet interaction effect of HSV during RCS is working,an improved model predictive control approach is presented by introducing the online parameter estimation of the jet interaction coefficient for dealing with the uncertainty and ***,considering the strong coupling effect between the yaw channel and roll channel,a coupled model predictive controller is designed by introducing the feedback of sideslip angle into the roll control channel to eliminate the coupling ***,the comparison simulations using the classical control method,MPC and IMPC approach are given to demonstrate the effectiveness and efficiency of the presented IMPC scheme.

关键词： hypersonic vehicle reentry attitude control mode predictive control jet interference factor reaction control systems