Search results for: Weimin Bao

Items from 1 to 20 out of 46 results

article

Class metric regularized deep belief network with sparse representation for fault diagnosis

Jie Yang, Weimin Bao, Yanming Liu, Xiaoping Li

International Journal of Intelligent Systems > 37 > 9 > 5996 - 6022

This paper proposes a joint class metric and sparse representation regularized deep belief network (J‐DBN) method for intelligent fault diagnosis of the rotary equipment. In this novel method, the joint class metric and sparse representation regularized DBN is considered as a pretraining method to extract data features. It combines advantages of both class metric and sparse representation, which can...

article

A loaded technique for modeling oblique wire in finite‐difference time‐domain method

Dongyang Sun, Congguang Mao, Chuanbao Du, Weimin Bao, more

Microwave and Optical Technology Letters > 62 > 10 > 3151 - 3156

When the thin wire whose orientation cannot be parallel to Cartesian axis is modeled by the finite‐difference time‐domain method, the staircasing introduce numerical errors and nonphysical phenomenon. In order to reduce the influence on the induced current, a loaded technique is proposed. The lumped elements are matched at the grid corner based on the contour‐path model. All the electromagnetic difference...

article

Investigation of GaN with Low Threading Dislocation Density Grown on Graphene/Sputtered AlN Composite Substrate

Yachao Zhang, Kai Su, Rui Guo, Shengrui Xu, more

physica status solidi (RRL) – Rapid Research Letters > 13 > 8 > n/a - n/a

High‐quality GaN film is grown on graphene with the underneath sputtered AlN modified layer using metal organic chemical vapor deposition. Due to the modulation effect of sputtered AlN on the surface potential and the chemical reactivity of graphene, the nucleation probability of GaN is significantly improved. The GaN epitaxial layer shows excellent crystal quality and surface morphology, and has...

article

Three-Dimensional Diving Guidance for Hypersonic Gliding Vehicle via Integrated Design of FTNDO and AMSTSMC

Yuxin Liao, Huifeng Li, Weimin Bao

IEEE Transactions on Industrial Electronics > 2018 > 65 > 3 > 2704 - 2715

The three-dimensional multiple constrained guidance problem for a hypersonic gliding vehicle (HGV) against a stationary ground target in dive phase is investigated. A coupled nonlinear dynamic model is established on account of the bank-to-turn control scheme adopted by the HGV, which formulates the relation between line-of-sight angles and trajectory control variables. On this basis, a finite-time...

article

Entry trajectory generation without reversal of bank angle

Ruizhi He, Luhua Liu, Guojian Tang, Weimin Bao

Aerospace Science and Technology > 2017 > 71 > C > 627-635

A rapid entry trajectory planning algorithm for hypersonic glide vehicles is presented in this paper, and the avoidance of no-fly zones with large cross-range is achieved. The highly-constrained entry trajectory generation mission is accomplished using an adjustable angle of attack and bank, instead of a nominal angle of attack and reversal logic of bank angle. In this way, the maneuvering capability...

article

Trajectory generation of heat load test based on gauss pseudospectral method

YuanLong Zhang, LuHua Liu, GuoJian Tang, WeiMin Bao

Science China Technological Sciences > 2018 > 61 > 2 > 273-284

A new trajectory generation for heat load test is proposed based on gauss pseudospectral method within limit range. Firstly, with multiple path constraints and flight task requirements taken into consideration, heat load parameters are introduced into the dynamics equations. In order to solve the problem of generating such a trajectory within limit range rapidly, the dynamics equations have been normalized...

chapter

Extended differential geometric guidance law with extended state observer

Jingshuai Huang, Hongbo Zhang, Guojian Tang, Weimin Bao

2017 8th International Conference on Mechanical and Aerospace Engineering (ICMAE) > 648 - 655

2017 8th International Conference on Mechanical and Aerospace Engineering (ICMAE)

No restrictions are imposed on the motion states of missile and target and the line of sight rotation coordinate system is introduced into the derivation of differential geometric guidance law. Then, the extended differential geometric guidance law is achieved whose scope of application is largely extended. In order to realize the derived law, instead of the complex computation of torsion command,...

chapter

Footprint determination for entry vehicles based on three-dimensional acceleration profile

Ruizhi He, Luhua Liu, Guojian Tang, Weimin Bao

2017 36th Chinese Control Conference (CCC) > 5754 - 5759

2017 36th Chinese Control Conference (CCC)

In this paper, a footprint determination algorithm for entry vehicles based on three-dimensional acceleration profile is proposed, which solves the problem of fast determination of the entry coverage with complex multi-constraints. The aerodynamic adjustment capability is greatly improved since both the angle of attack and bank are regarded as primary variables, and in this way larger entry footprint...

article

Sun sensor using a nanosatellites solar panels by means of time-division multiplexing

Xiaozhou Lü, Yebo Tao, Kai Xie, Xiaoping Li, more

IET Science, Measurement & Technology > 2017 > 11 > 4 > 489 - 494

The solar vector, which defines the angle between the satellite and the Sun, is an important parameter for attitude control of a nanosatellite. It is highly desirable to enable accurate attitude control of a nanosatellite without increasing size and mass. To solve this issue, this study presents a novel sun sensor based on solar panel time-division multiplexing. The mathematical relationship between...

chapter

Maneuver trajectory design for hypersonic glide vehicles in dive phase

Ruizhi He, Luhua Liu, Guojian Tang, Weimin Bao

2017 29th Chinese Control And Decision Conference (CCDC) > 802 - 807

2017 29th Chinese Control And Decision Conference (CCDC)

In this paper, a planning approach of maneuver trajectory based on dynamic inversion is proposed, which can greatly improve the penetrability of hypersonic glide vehicles in dive phase. Maeuvering and guiding overloads are combined using a weight coefficient, which is designed as the function of altitude. Enough adjust ability is guranteed at the end of dive phase, and more complex maneuver trajectories...

chapter

Radar tracking for hypersonic glide vehicle based on aerodynamic model

Jingshuai Huang, Hongbo Zhang, Guojian Tang, Weimin Bao

2017 29th Chinese Control And Decision Conference (CCDC) > 1080 - 1084

2017 29th Chinese Control And Decision Conference (CCDC)

In order to achieve hit-to-kill in terms of intercepting the hypersonic glide vehicle, the first task is to accurately track the flight state and predict the trajectory. In this paper, a radar tracking approach for hypersonic glide vehicles is proposed based on a novel aerodynamic model. The extended motion equations are derived on basis of the established aerodynamic acceleration, and the measurement...

article

Three-Dimensional Interfacial Stress Decoupling Method for Rehabilitation Therapy Robot

Xiaozhou Lu, Weimin Bao, Songlin Wang, Yebo Tao, more

IEEE Transactions on Industrial Electronics > 2017 > 64 > 5 > 3970 - 3977

Robot-assisted therapy can provide effective rehabilitation training for stroke patients. The interfacial stress between the manipulator and the grasped patient's body is very important for a rehabilitation therapy robot. This paper presents a measurement method, which is able to decouple the measurement of the three-dimensional (3-D) interfacial stress components. To implement the method, interfacial...

article

Second-Order Dynamic Sliding-Mode Control for Nonminimum Phase Underactuated Hypersonic Vehicles

Zhi Wang, Weimin Bao, Huifeng Li

IEEE Transactions on Industrial Electronics > 2017 > 64 > 4 > 3105 - 3112

This paper deals with the second-order dynamic sliding-mode control (SODSMC) problem for nonminimum phase underactuated hypersonic vehicles. First, the underactuated hypersonic vehicle attitude control model is introduced. The normal form and the nonminimum phase nature for the vehicle are discussed. Thus, the nonminimum phase system is divided into the minimum phase subsystem and the nonminimum phase...

article

A semi-physical sediment yield model for estimation of suspended sediment in loess region

Wei Si, Weimin Bao, Peng Jiang, Liping Zhao, more

International Journal of Sediment Research > 2017 > 32 > 1 > 12-19

Sediment yield is a complex function of many environmental factors including climate, hydrology, vegetation, basin topography, soil types, and land cover. We present a new semi-physical watershed sediment yield model for the estimation of suspended sediment in loess region. This model is composed by three modules in slope, gully, and stream phases. For slope sediment yield, a balance equation is established...

article

Effect of X-ray energy band on the X-ray pulsar based navigation

Haifeng Sun, Weimin Bao, Haiyan Fang, Lirong Shen, more

Aerospace Science and Technology > 2016 > 58 > C > 150-155

The X-ray energy band, which has a direct impact on the detector configuration and the estimation accuracy of the pulse time of arrival (TOA), is an important physical parameter for X-ray pulsar based navigation (XPNAV). Despite nearly five decades of work, there is still no convincing quality analysis for the effect of the X-ray energy on the XPNAV. In this paper, the impacts of the X-ray energy...

chapter

Integrated diving guidance strategy with multiple constraints

Jianwen Zhu, Luhua Liu, Guojian Tang, Weimin Bao

2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC) > 1823 - 1828

2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC)

A multiple constrained diving guidance law which can satisfy terminal angle and velocity constraints for hypersonic vehicle is studied in this paper. The relative motion equations between a vehicle and a moving target are constructed, and pseudo control strategy is introduced to simplify the original nonlinear equations. In addition, it employs optimal control with minimum energy consumption to design...

chapter

Analyses and reflection of intelligent autonomous technology for Chinese manned deep space exploration

Kunfeng Lu, Zhenqiang Qi, Jiarun Liu, Weimin Bao

2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC) > 1033 - 1038

2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC)

Chinese manned deep space exploration (CMDSE) will make outstanding contributions to the progress of human civilization, and make human beings understand the origin, evolution and status of the universe in a wider and deeper level. Intelligent autonomous technology, which has the ability of automatic acquisition and application of knowledge, thinking and reasoning, problem solving and automatic learning,...

article

An efficient wavefront parallel algorithm for structured three dimensional LU-SGS

Chunye Gong, Weimin Bao, Jie Liu, Guojian Tang, more

Computers & Fluids > 2016 > 134-135 > C > 23-30

Parallel computing is a useful technology for scientific and engineering algorithms/applications. LU-SGS (lower-upper Symmetric-Gauss–Seidel method) is an efficient and robust scheme for CFD (Computational fluid dynamics) and has strong data dependence in its computation. In this paper, we present an efficient wavefront parallel algorithm for 3D (three dimensional) LU-SGS with structured meshes. The...

chapter

Application of fractional-order calculus in sliding mode control for hypersonic vehicles

Haidong Liu, Weimin Bao, Huifeng Li, Chunye Gong, more

2016 35th Chinese Control Conference (CCC) > 936 - 940

2016 35th Chinese Control Conference (CCC)

In this paper, fractional-order calculus (FC) is applied in the sliding mode control of a generic hypersonic vehicle (GHV). In the design of the controller, dynamic inversion is applied to deal with strong couplings among pitch angle, yaw angle and roll angle. The effect of FC is evaluated in a sliding mode controller. Simulation results demonstrate that sliding mode controller becomes more robust...

chapter

Rapid generation of multi-target entry trajectory for hypersonic glide vehicles

Ruizhi He, Luhua Liu, Guojian Tang, Weimin Bao

2016 35th Chinese Control Conference (CCC) > 5307 - 5312

2016 35th Chinese Control Conference (CCC)

An entry trajectory planning algorithm that generates multi-target trajectories satisfying path and terminal constraints is investigated in this paper. The entry trajectory is divided into the initial and glide phase, and a switch condition is used to ensure a smooth connection of these two phases. A nominal angle of attack is used in the whole trajectory and then the bank angle is the main control...

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INFONA - science communication portal

Search results for: Weimin Bao

Class metric regularized deep belief network with sparse representation for fault diagnosis

A loaded technique for modeling oblique wire in finite‐difference time‐domain method

Investigation of GaN with Low Threading Dislocation Density Grown on Graphene/Sputtered AlN Composite Substrate

Three-Dimensional Diving Guidance for Hypersonic Gliding Vehicle via Integrated Design of FTNDO and AMSTSMC

Entry trajectory generation without reversal of bank angle

Trajectory generation of heat load test based on gauss pseudospectral method

Extended differential geometric guidance law with extended state observer

Footprint determination for entry vehicles based on three-dimensional acceleration profile

Sun sensor using a nanosatellites solar panels by means of time-division multiplexing

Maneuver trajectory design for hypersonic glide vehicles in dive phase

Radar tracking for hypersonic glide vehicle based on aerodynamic model

Three-Dimensional Interfacial Stress Decoupling Method for Rehabilitation Therapy Robot

Second-Order Dynamic Sliding-Mode Control for Nonminimum Phase Underactuated Hypersonic Vehicles

A semi-physical sediment yield model for estimation of suspended sediment in loess region

Effect of X-ray energy band on the X-ray pulsar based navigation

Integrated diving guidance strategy with multiple constraints

Analyses and reflection of intelligent autonomous technology for Chinese manned deep space exploration

An efficient wavefront parallel algorithm for structured three dimensional LU-SGS

Application of fractional-order calculus in sliding mode control for hypersonic vehicles

Rapid generation of multi-target entry trajectory for hypersonic glide vehicles

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