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A descent method for the Dubins traveling salesman problem with neighborhoods Research Articles

Zheng Chen, Chen-hao Sun, Xue-ming Shao, Wen-jie Zhao,z_chen@zju.edu.cn,mecsxm@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 5,   Pages 615-766 doi: 10.1631/FITEE.2000041

Abstract: In this study, we focus mainly on the problem of finding the minimum-length path through a set of circular regions by a fixed-wing unmanned aerial vehicle. Such a problem is referred to as the with neighborhoods (DTSPN). Algorithms developed in the literature for solving DTSPN either are computationally demanding or generate low-quality solutions. To achieve a better trade-off between solution quality and computational cost, an efficient gradient-free is designed. The core idea of the is to decompose DTSPN into a series of subproblems, each of which consists of finding the minimum-length path of a from a configuration to another configuration via an intermediate circular region. By analyzing the geometric properties of the subproblems, we use a bisection method to solve the subproblems. As a result, the can efficiently address DTSPN by successively solving a series of subproblems. Finally, several numerical experiments are carried out to demonstrate the in comparison with several existing algorithms.

Keywords： Dubins飞行器；坐标下降法；Dubins旅行商问题    

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Robot Pilot: A New Autonomous System Toward Flying Manned Aerial Vehicles Article

Zibo Jin, Daochun Li, Jinwu Xiang

Engineering 2023, Volume 27, Issue 8,   Pages 242-253 doi: 10.1016/j.eng.2022.10.018

Abstract:

The robot pilot is a new concept of a robot system that pilots a manned aircraft, thereby forming a new type of unmanned aircraft system (UAS) that makes full use of the platform maturity, load capacity, and airworthiness of existing manned aircraft while greatly expanding the operation and application fields of UASs. In this research, the implementation and advantages of the robot pilot concept are discussed in
detail, and a helicopter robot pilot is proposed to fly manned helicopters. The robot manipulators are designed according to the handling characteristics of the helicopter-controlling mechanism. Based on a kinematic analysis of the robot manipulators, a direct-driving method is established for the robot flight controller to reduce the time delay and control error of the robot servo process. A supporting ground station
is built to realize different flight modes and the functional integration of the robot pilot. Finally, a prototype of the helicopter robot pilot is processed and installed in a helicopter to carry out flight tests. The test results show that the robot pilot can independently fly the helicopter to realize forward flight, backward flight, side flight, and turning flight, which verifies the effectiveness of the helicopter robot pilot.

Keywords： Helicopter     Robot pilot     Flight control     Unmanned system    

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Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

Song Jian

Strategic Study of CAE 2000, Volume 2, Issue 10,   Pages 63-72

Abstract:

In this paper, the influence of thrust and air drag on rocket lateral vibration is studied, and the frequency reduction under the thrust and drag is analyzed. The formulas for evaluation of the changes of frequencies and vibration modes are obtained. The equations of transverse movement when nozzle connected rigidly with rocket and related boundary conditions form the basis for analyses. The conclusions obtained are applicable for active accelerating and passive decelerating parts of trajectory as well as the cruise flight when thrust and drag are balanced. The analyses show that for small thrust and small axial overload, the discrepancy resulted from different calculation methods is not big, whereas for the heavy overloaded case a more accurate solution is extremely necessary.

Keywords： aircraft     rocket     lateral vibration     thrust and drag     vibration mode and frequency    

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Study on modeling and simulation analysis for tailless configured V/STOL

Fan Yong,Zhu Jihong,Meng Xianyu,Liu Kai,Yang Xili

Strategic Study of CAE 2011, Volume 13, Issue 3,   Pages 107-112

Abstract:

The mathematical model was studied by mechanical analysis and CFD (computing fluid dynamics) computation. Besides, an intelligent adaptive based control law was proposed and the optimization approach is employed to solve the constrained control allocation problem. The results show good closed loop performance and validate the intelligent optimization approach of constrained control allocation for flight control.

Keywords： tailless configured aerial vehicle     V/STOL     dynamic modeling     flight control    

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Adaptive tracking control for air-breathing hypersonic vehicles with state constraints Article

Gong-jun LI

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 599-614 doi: 10.1631/FITEE.1500464

Abstract: We investigate the adaptive tracking problem for the longitudinal dynamics of state-constrained airbreathing hypersonic vehicles, where not only the velocity and the altitude, but also the angle of attack (AOA) is required to be tracked. A novel indirect AOA tracking strategy is proposed by viewing the pitch angle as a new output and devising an appropriate pitch angle reference trajectory. Then based on the redefined outputs (i.e., the velocity, the altitude, and the pitch angle), a modified backstepping design is proposed where the barrier Lyapunov function is used to solve the state-constrained control problem and the control gain of this class of systems is unknown. Stability analysis is given to show that the tracking objective is achieved, all the closed-loop signals are bounded, and all the states always satisfy the given constraints. Finally, numerical simulations verify the effectiveness of the proposed approach.

Keywords： Hypersonic vehicle     Constraints     Output redefinition     Barrier Lyapunov function    

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Application of phase change materials to thermal controlsystems for hypersonic vehicles

Wang Peiguang,Liu Yongji,Wang Jun

Strategic Study of CAE 2008, Volume 10, Issue 7,   Pages 188-192

Abstract:

To solve the problem of thermal barrier is one of the key technologies that restrict the development of hypersonic vehicles. Starting from the point that phase change materials could be used as additional heat sink, five thermal control system concepts using phase change materials are put forward based on characteristic of different vehicles. They are air cycle system, vapor cycle system, liquid loop system, open evaporation cooling system and direct phase change materials heat storage system. The key technologies for the concepts are selection of appropriate phase change materials and encapsulation design of the materials, which are discussed on the background of aeronautics and astronautics.

Keywords： phase change material     thermal control     hypersonic vehicle    

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Discussion on Integrated Environment Control Thermal Management System Concepts for Hypersonic Vehicle

Wang Peiguang,Liu Yongji, Wang Jun

Strategic Study of CAE 2007, Volume 9, Issue 2,   Pages 38-48

Abstract:

Hypersonic vehicle is nowadays a focus in the field of aeronautics and astronautics. It will encounter with severe aero-heating during hypersonic flight. As a result, a reliable integrated thermal management system is a necessity to ensure flight safety. Concept of integrated thermal management system was put forward respectively,based on the characteristics of hypersonic vehicles with different missions.For vehicle which is characterized by short flight time and quick change of velocity and altitude,a concept of thermal management system which uses liquid唱hydrogen as major heat sink and PCM material as supplementary heat sink was presented. For that with longer flight time and higher Mach number,a concept of thermal management system using endothermic fuels as heat sink was advanced.Key technologies concerning these concepts were discussed, and research focuses in the future were indicated.

Keywords： hypersonic     vehicle     thermal management    

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Structural Deformation Monitoring of Flight Vehicles Based on Optical Fiber Sensing Technology: A Review and Future Perspectives Review

Lianqing Zhu,Guangkai Sun,Weimin Bao,Zheng You,Fanyong Meng,Mingli Dong

Engineering 2022, Volume 16, Issue 9,   Pages 39-55 doi: 10.1016/j.eng.2021.02.022

Abstract:

Structural deformation monitoring of flight vehicles based on optical fiber sensing (OFS) technology has been a focus of research in the field of aerospace. After nearly 30 years of research and development, Chinese and international researchers have made significant advances in the areas of theory and methods, technology and systems, and ground experiments and flight tests. These advances have led to the development of OFS technology from the laboratory research stage to the engineering application stage. However, a few problems encountered in practical applications limit the wider application and further development of this technology, and thus urgently require solutions. This paper reviews the history of research on the deformation monitoring of flight vehicles. It examines various aspects of OFS-based deformation monitoring including the main varieties of OFS technology, technical advantages and disadvantages, suitability in aerospace applications, deformation reconstruction algorithms, and typical applications. This paper points out the key unresolved problems and the main evolution paradigms of engineering applications. It further discusses future development directions from the perspectives of an evolution paradigm, standardization, new materials, intelligentization, and collaboration.

Keywords： Optical fiber sensing technology     Deformation monitoring     Structural health monitoring     Flight vehicle     Aerospace    

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Flight control for air-breathing hypersonic vehicles using linear quadratic regulator design based on stochastic robustness analysis Article

Lin CAO, Shuo TANG, Dong ZHANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 7,   Pages 882-897 doi: 10.1631/FITEE.1601363

Abstract: The flight dynamics model of air-breathing hypersonic vehicles (AHVs) is highly nonlinear and multivariable cou-pling, and includes inertial uncertainties and external disturbances that require strong, robust, and high-accuracy controllers. In this paper, we propose a linear-quadratic regulator (LQR) design method based on stochastic robustness analysis for the longitudinal dynamics of AHVs. First, input/output feedback linearization is used to design LQRs. Second, subject to various system parameter uncertainties, system robustness is characterized by the probability of stability and desired performance. Then, the mapping rela-tionship between system robustness and LQR parameters is established. Particularly, to maximize system robustness, a novel hybrid particle swarm optimization algorithm is proposed to search for the optimal LQR parameters. During the search iteration, a Chernoff bound algorithm is applied to determine the finite sample size of Monte Carlo evaluation with the given probability levels. Finally, simulation results show that the optimization algorithm can effectively find the optimal solution to the LQR parameters.

Keywords： Air-breathing hypersonic vehicles (AHVs)     Stochastic robustness analysis     Linear-quadratic regulator (LQR)     Particle swarm optimization (PSO)     Improved hybrid PSO algorithm    

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Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Strategic Study of CAE 2003, Volume 5, Issue 3,   Pages 25-26

Abstract:

This paper discusses the development of aeronautics and astronautics with mechanics, reveals the development of new branches of interconnected sciences in mechanics, describes the relations of flight mechanics with aerodynamics, structure mechanics, general mechanics and automatic control, and introduces the new branch of flight mechanics—flight dynamics of elastic vehicle.

Keywords： aerodynamics     structure mechanics     general mechanics     automatic control     flight mechanics     flight dynamics of elastic vehicles    

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Active fault-tolerant tracking control of a quadrotorwith model uncertainties and actuator faults None

Yu-jiang ZHONG, Zhi-xiang LIU, You-min ZHANG, Wei ZHANG, Jun-yi ZUO

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 95-106 doi: 10.1631/FITEE.1800570

Abstract:

This paper presents a reliable active fault-tolerant tracking control system (AFTTCS) for actuator faults in a quadrotor unmanned aerial vehicle (QUAV). The proposed AFTTCS is designed based on a well-known model reference adaptive control (MRAC) framework that guarantees the global asymptotic stability of a QUAV system. To mitigate the negative impacts of model uncertainties and enhance system robustness, a radial basis function neural network is incorporated into the MRAC scheme for adaptively identifying the model uncertainties online and modifying the reference model. Meanwhile, actuator dynamics are considered to avoid undesirable performance degradation. Furthermore, a fault detection and diagnosis estimator is constructed to diagnose lossof-control-effectiveness faults in actuators. Based on the fault information, a fault compensation term is added to the control law to compensate for the adverse effects of actuator faults. Simulation results show that the proposed AFTTCS enables the QUAV to track the desired reference commands in the absence/presence of actuator faults with satisfactory performance.

Keywords： Model reference adaptive control     Neural network     Quadrotor     Fault-tolerant control     Fault detection and diagnosis    

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Interval type-2 fuzzy logic based radar task priority assignment method for detecting hypersonic-glide vehicles Research Articles

Fanqing MENG, Kangsheng TIAN,maoximengruizhi@126.com,tiankangsheng@sohu.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3,   Pages 488-501 doi: 10.1631/FITEE.2000560

Abstract: A radar task method based on was designed to solve the problem of resource management for to detect hypersonic-glide vehicles (HGVs). The mathematical model of the radar task and the motion and detection models of HGVs are described in detail. The target threat of an HGV is divided into maneuver, speed, azimuth, and distance threats. In the radar task method based on IT2FLS, the maneuver factor, speed, azimuth difference, distance, and initial priority are input variables. The radar task priority is the output variable. To reduce the number of fuzzy rules and avoid rule explosion, an IT2FLS with a hierarchical structure was designed. Finally, the feasibility of the task method was verified by simulations. Simulation results showed that the method based on IT2FLS has a higher precise tracking rate, mean initial priority, and target threat degree, and a shorter offset time.

Keywords： Hypersonic-glide vehicle (HGV)     Phased-array radar     Interval type-2 fuzzy logic system (IT2FLS)     Priority assignment    

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An Engineering Method to Calculate Transmitting Effect of Aero-optics for Hypersonic Interceptor

Yin Xingliang

Strategic Study of CAE 2006, Volume 8, Issue 11,   Pages 74-79

Abstract:

Transmitting effects of aero-optics is very important to optical imaging probing system of interceptor, as it may cause displacement, jitter and blurring of image to receive for the system. The optic transmitting characteristics is analyzed when target ray goes though turbulence flow. The engineering model for optical transmitting characteristics of flow is built up and empirical model for optical imaging system induced by aero-optic transmitting effects is described. The displacement, jitter and blurring are simulated. The numerical simulation results suggest that transmitting effect of aero-optics has powerful influence on the imaging probing system, which is related to flight parameters, imaging system parameters and integration periods of imaging probing system, etc.

Keywords： aerodynamics     turbulent flows     optics     aero-optics     transmitting effect    

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Safe navigation of quadrotorswith jerk limited trajectory None

Shu-peng LAI, Meng-lu LAN, Ya-xuan LI, Ben M. CHEN

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 107-119 doi: 10.1631/FITEE.1800719

Abstract:

Many aerial applications require unmanned aerial systems operate in safe zones because of the presence of obstacles or security regulations. It is a non-trivial task to generate a smooth trajectory satisfying both dynamic constraints and motion limits of the unmanned vehicles while being inside the safe zones. Then the task becomes even more challenging for real-time applications, for which computational efficiency is crucial. In this study, we present a safe flying corridor navigation method, which combines jerk limited trajectories with an efficient testing method to update the position setpoints in real time. Trajectories are generated online and incrementally with a cycle time smaller than 10 μs, which is exceptionally suitable for vehicles with limited onboard computational capability. Safe zones are represented with multiple interconnected bounding boxes which can be arbitrarily oriented. The jerk limited trajectory generation algorithm has been extended to cover the cases with asymmetrical motion limits. The proposed method has been successfully tested and verified in flight simulations and actual experiments.

Keywords： Quadrotor     Unmanned aerial vehicle     Motion planning    

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Strategic Research on Disruptive Technologies in the Field of Mechanical and Vehicle Engineering

Yang Yanming, Zhao Yun, Shao Zhufeng, Li Daochun, Gao Zenggui, Zhang Zilong, Shen Yue, Wang Linjun

Strategic Study of CAE 2018, Volume 20, Issue 6,   Pages 27-33 doi: 10.15302/J-SSCAE-2018.06.005

Abstract:

Through literature research and expert interviews, the existing or potential disruptive technologies in the field of mechanical and vehicle engineering were proposed: bionic intelligent technology, shaftless rim propulsion technology, intelligent unmanned aerial vehicle technology, ultra-loop train technology, and electromechanical systems (MEMS). The innovative and disruptive advantages of these five technologies were subsequently analyzed. Finally, the suggestions for the development of disruptive technologies in the field of mechanical and vehicle were proposed.

Keywords： mechanical and vehicle engineering     disruptive technologies     bionic intelligent technology     shaftless rim propulsion technology     intelligent unmanned aerial vehicle technology     ultra-loop train technology     MEMS    

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Title Author Date Type Operation

A descent method for the Dubins traveling salesman problem with neighborhoods

Zheng Chen, Chen-hao Sun, Xue-ming Shao, Wen-jie Zhao,z_chen@zju.edu.cn,mecsxm@zju.edu.cn

Journal Article

Robot Pilot: A New Autonomous System Toward Flying Manned Aerial Vehicles

Zibo Jin, Daochun Li, Jinwu Xiang

Journal Article

Lateral Vibration Analyses of Flying Vehicle under Thrust and Drag

Song Jian

Journal Article

Study on modeling and simulation analysis for tailless configured V/STOL

Fan Yong,Zhu Jihong,Meng Xianyu,Liu Kai,Yang Xili

Journal Article

Adaptive tracking control for air-breathing hypersonic vehicles with state constraints

Gong-jun LI

Journal Article

Application of phase change materials to thermal controlsystems for hypersonic vehicles

Wang Peiguang,Liu Yongji,Wang Jun

Journal Article

Discussion on Integrated Environment Control Thermal Management System Concepts for Hypersonic Vehicle

Wang Peiguang,Liu Yongji, Wang Jun

Journal Article

Structural Deformation Monitoring of Flight Vehicles Based on Optical Fiber Sensing Technology: A Review and Future Perspectives

Lianqing Zhu,Guangkai Sun,Weimin Bao,Zheng You,Fanyong Meng,Mingli Dong

Journal Article

Flight control for air-breathing hypersonic vehicles using linear quadratic regulator design based on stochastic robustness analysis

Lin CAO, Shuo TANG, Dong ZHANG

Journal Article

Dvelopment of Aeronautics and Astronautics With Mechanics

Chen Shilu

Journal Article

Active fault-tolerant tracking control of a quadrotorwith model uncertainties and actuator faults

Yu-jiang ZHONG, Zhi-xiang LIU, You-min ZHANG, Wei ZHANG, Jun-yi ZUO

Journal Article

Interval type-2 fuzzy logic based radar task priority assignment method for detecting hypersonic-glide vehicles

Fanqing MENG, Kangsheng TIAN,maoximengruizhi@126.com,tiankangsheng@sohu.com

Journal Article

An Engineering Method to Calculate Transmitting Effect of Aero-optics for Hypersonic Interceptor

Yin Xingliang

Journal Article

Safe navigation of quadrotorswith jerk limited trajectory

Shu-peng LAI, Meng-lu LAN, Ya-xuan LI, Ben M. CHEN

Journal Article

Strategic Research on Disruptive Technologies in the Field of Mechanical and Vehicle Engineering

Yang Yanming, Zhao Yun, Shao Zhufeng, Li Daochun, Gao Zenggui, Zhang Zilong, Shen Yue, Wang Linjun

Journal Article