Journals >Electronics Optics & Control
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2013
Volume: 20 Issue 3
22 Article(s)
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Research Article
Fast and Optimal Three Dimensional Trajectory Planning with Obstacle Avoidance Performance
LIU Heming, HUANG Changqiang, HUANG Hanqiao, and DING Dali
A “man-in-the-loop” task planning strategy was proposed to satisfy the growing autonomous need for Unmanned Combat Aircraft Vehicles (UCAVs).A fast trajectory planning scheme was put forward based on Gauss Pseudospectral Method (GPM) considering the requirement of UCAVs.In the scheme the UCAV aerodynamic characteristicA “man-in-the-loop” task planning strategy was proposed to satisfy the growing autonomous need for Unmanned Combat Aircraft Vehicles (UCAVs).A fast trajectory planning scheme was put forward based on Gauss Pseudospectral Method (GPM) considering the requirement of UCAVs.In the scheme the UCAV aerodynamic characteristics the thrust characteristics and the influence of atmosphere environments were taken into consideration based on which a UCAV model with high accuracy was built up.A trajectory planning model was built up based on optimal control theory and analysis to various complicate constraints such as the UCAV flight envelop in real environment and three dimensional obstacle battlefields.Finally the basic principle of using GPM to solve the optimal control problem for UCAV trajectory planning was analyzed.Simulation results show that GPM can generate a continuous viable and optimal trajectory satisfying various complicated constraints..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 1 (2013)
A UAV TT&C System for One Station Controlling Several Vehicles
YANG Liuqing, and XIAO Qiangui
Based on principle of multi-functional miniaturization and low cost we designed a kind of UAV TT&C system adaptive for autonomous operation and multi-aircraft cooperative combat.The system is based on Time Division Duplex (TDD)and Time Division Multiple Access(TDMA) and selects the data radio as the hardware platfoBased on principle of multi-functional miniaturization and low cost we designed a kind of UAV TT&C system adaptive for autonomous operation and multi-aircraft cooperative combat.The system is based on Time Division Duplex (TDD)and Time Division Multiple Access(TDMA) and selects the data radio as the hardware platform.Moreover the system uses the CF card as the storage medium and integrates telemetry data recording and playback functions.It can realize semi-real-time and non-real-time measurement and control function when communication link breaks..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 6 (2013)
Detailed Planning of Fighter Based on Legendre Pseudospectral Method
CHEN Zhongqi, ZHOU Zhongliang, HUANG Jun, and GOU Xinyu
The main reason to realize detailed planning is to combine flight control with fire control.In the paper one theoretical framework for realizing detailed planning is given.Firstly the threat constraints and fire control border constraints models are built up a 6-DOF motion equation of the fighter was given and the detaThe main reason to realize detailed planning is to combine flight control with fire control.In the paper one theoretical framework for realizing detailed planning is given.Firstly the threat constraints and fire control border constraints models are built up a 6-DOF motion equation of the fighter was given and the detailed planning problem was changed into an optimal control problem based on the constrains by taking the motion equation as the state equation.Secondly Legendre Pseudospectral Method (LPM) was introduced to convert the optimal control problem into a Nonlinear Programming (NLP) problem with constrains.By improving the C Code Feasible Sequential Quadratic Programming (CFSQP) algorithm optimal results of the NLP problem could be quickly obtained.Simulation studies show that this framework works very well..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 10 (2013)
Moving Target Detection Based on Level Set Framework Model Solved by Split Bregman Iteration
XU Guoqiang, WANG Dengwei, and SHI Wenjun
A moving target detection method was proposed based on the piecewise constant Mumford-Shah model (also known as the C-V model) solved by the Split Bregman iteration.In the method the Gaussian mixture model was used for background modeling and then the background was subtracted to obtain the moving regions of the image A moving target detection method was proposed based on the piecewise constant Mumford-Shah model (also known as the C-V model) solved by the Split Bregman iteration.In the method the Gaussian mixture model was used for background modeling and then the background was subtracted to obtain the moving regions of the image sequence (the handling objects of our method).As a result of the introduction of the Split Bregman iteration scheme we could use a rather large time step while maintaining the stability of the evolution process.The experimental results demonstrated that for real infrared image sequences the Split Bregman iteration scheme can accelerate the evolution of the curve and significantly reduce the number of iterations which proved the validity of our method..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 16 (2013)
Tactical Decision-Making Method Based on Receding Horizon Control for Air Combat
FU Zhaowang, LI Zhanwu, QIANG Xiaoming, and XU An
Based on the Receding Horizon Control (RHC)model a tactical decision-making method was proposed for the air combat.Firstly the set description of detecting superiority and attacking superiority was given based on combat situation and operational capability of the fighter.The quantitative evaluation function was establiBased on the Receding Horizon Control (RHC)model a tactical decision-making method was proposed for the air combat.Firstly the set description of detecting superiority and attacking superiority was given based on combat situation and operational capability of the fighter.The quantitative evaluation function was established and the tactical decision-making object set was acquired.Then an index function for decision-making was constructed taking the tactic superiority maneuvering time and control cost into consideration.After that a numerical solution was given based on the direct multiple shooting method.The simulation result shows that tactical decision-making model based on RHC can effectively reach the attack condition while avoiding the threats and the solution can satisfy the real-time requirement..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 20 (2013)
Operational Decision-Making Synchronization from Viewpoint of Time
ZOU Zhigang, LIU Fuxian, and XIA Lu
Considering that it is difficult to study quantitatively the operational decision-making synchronization we proposed a method on operational decision-making synchronization from time viewpoint.Firstly the process of operational decision-making synchronization was analyzed from the viewpoint of time and time-consuming mConsidering that it is difficult to study quantitatively the operational decision-making synchronization we proposed a method on operational decision-making synchronization from time viewpoint.Firstly the process of operational decision-making synchronization was analyzed from the viewpoint of time and time-consuming measure indexes of operation communication were proposed.Secondly the time lag coupling model of operational decision-making synchronization was established.Finally the case analysis showed that the shortcomings that the opinion of the operation systems can not reach unification could be solved with the proposed model.Some methods such as adjusting links in network and shifting the target decision node were given to improve the capability of decision-making synchronization which supplied a new way for quantitative study on decision-making synchronization..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 25 (2013)
Active Fault-Tolerant Control for Missile Actuators Based on Fault Compensation Idea
CAO Xiangyu, HU Changhua, QIAO Junfeng, and MA Qingliang
In order to enhance the reliability of missile attitude control system an approach of active fault-tolerant control method for missile actuators based on fault compensation idea was proposed.The structure and function characteristics of cross-type rocket engine′s actuator was studied thoroughly and the failure modes anIn order to enhance the reliability of missile attitude control system an approach of active fault-tolerant control method for missile actuators based on fault compensation idea was proposed.The structure and function characteristics of cross-type rocket engine′s actuator was studied thoroughly and the failure modes and their effects were analyzed.Then an active fault-tolerant control scheme was proposed,and fault-tolerant control algorithms based on fault compensation idea for deadlock fault and constant deflection fault were derived.Simulation results show that the proposed approach is effective and overcomes the applicability limitation of traditional passive fault-tolerant control method..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 30 (2013)
Fuzzy Adaptive Controller Design for Nonlinear Singularly Perturbed Systems
LI Li, and SUN Fuchun
We proposed a new approach of the adaptive fuzzy control to solve the tracking problem of the MIMO NSPS with unknown models.The NSPS was decomposed into slow and fast subsystems.For the slow-subsystem a direct adaptive fuzzy controller with adjustable parameters was designed to make the slow variables follow desired trWe proposed a new approach of the adaptive fuzzy control to solve the tracking problem of the MIMO NSPS with unknown models.The NSPS was decomposed into slow and fast subsystems.For the slow-subsystem a direct adaptive fuzzy controller with adjustable parameters was designed to make the slow variables follow desired trajectory.As for the fast-subsystem a fuzzy controller was used to guarantee the fast variables stable.The whole controller was the composition of the slow and fast control.Lyapunov synthesis approach could guarantee the stability of the whole system provided that the perturbation parameter is small enough.Simulations illustrate the effectiveness of the proposed approach..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 35 (2013)
A Method for SURF Feature Point Matching Based on Fusion of Ratio and Correlation Methods
ZHOU Yang, WU Dewei, TAI Nengjian, and DU Jia
In order to satisfy the requirements of UCAVs in cognitive navigation on high matching score and low error rate for feature point matching a fused matching method for SURF feature points was proposed.Analysis was made to the performance of purifying matching pairs for the ratio method and correlation method based on whIn order to satisfy the requirements of UCAVs in cognitive navigation on high matching score and low error rate for feature point matching a fused matching method for SURF feature points was proposed.Analysis was made to the performance of purifying matching pairs for the ratio method and correlation method based on which the two methods were fused together and the matching pairs were purified by partitioning the threshold intervals.Simulation results show that the fused method can obtain matched feature points with high matching score and low error rate and can effectively compensate the deficiency that can’t choose the threshold clearly without prior knowledge..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 40 (2013)
Attitude Decoupling Control for Quadrotor Aircraft Based on Active Disturbance Rejection Control Technique
LI Jie, QI Xiaohui, and HAN Shuaitao
An active disturbance rejection attitude controller was designed to control its attitude based on the nonlinear and coupled model of small quadrotor aircraft.The active disturbances rejection attitude control technique was introduced and the structure of the active disturbance rejection controller was described includiAn active disturbance rejection attitude controller was designed to control its attitude based on the nonlinear and coupled model of small quadrotor aircraft.The active disturbances rejection attitude control technique was introduced and the structure of the active disturbance rejection controller was described including the arranging transitional process extended state observer and nonlinear law state error feedback.Simulation was carried out based on Simulink.The parameter tuning and simulation results indicate that the designed controller has strong robustness and anti-disturbance performance and the system has good dynamic performance and steady state performance which can control the nonlinear and coupled system effectively..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 44 (2013)
A Summary on Integrated Sensor System of EO and RF for UAVs
CUI Jianpeng, GONG Guanfeng, WANG Gang, and ZHU Yuhu
The history of airborne integrated sensor system is introduced and the fulfill methods and characteristics of the system are presented.The architecture of the integrated sensor system onboard “Global Hawk” is analyzed.Finally some suggestions are given about the domestic development of the integrated sensor system baseThe history of airborne integrated sensor system is introduced and the fulfill methods and characteristics of the system are presented.The architecture of the integrated sensor system onboard “Global Hawk” is analyzed.Finally some suggestions are given about the domestic development of the integrated sensor system based on Electro-Optical (EO) and Radio Frequency (RF) sensors for UAVs..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 49 (2013)
Summarization of Testing Systems for Low-Background Infrared Cryogenic Chamber
SHI Xuehu, WU Xiaoyang, and WANG Yingrui
In order to test and evaluate the performance of the infrared system in low-background a cryo-chamber system is needed for simulating the low-background environment.First the general situation of the cryo-chamber technologies abroad is presented.Then the development of the Kinetic Kill Vehicle Hardware-in-the-Loop VacuIn order to test and evaluate the performance of the infrared system in low-background a cryo-chamber system is needed for simulating the low-background environment.First the general situation of the cryo-chamber technologies abroad is presented.Then the development of the Kinetic Kill Vehicle Hardware-in-the-Loop Vacuum Cold Chamber (KVACC) and the functions of each part are introduced including the chambers the cooling system the vacuum system the cryogenic optical system the cryogenic radiometer system the clean room environment and the monitoring system.The key technologies of the cryo-chamber system are summarized including the cryogenic optical technology the cryogenic electromechanical technology and the cryogenic resistor array technology.In the end the development and design characteristics of KVACC are summarized and a suggestion to the development of the cryo-chamber technologies at home is put forward..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 53 (2013)
Big Screen Multi-Channel Visual Flight Simulation Technique for Unmanned Helicopters
XUAN Hao, ZHEN Ziyang, WANG Xinhua, GONG Huajun, and CHEN Qi
In order to better demonstrate the simulation results of the unmanned helicopter flight control a multi-channel visual simulation platform was developed for unmanned helicopter flight control.This platform used three channels to demonstrate the simulation results on a big screen.Visual C++6.0 was used for programming oIn order to better demonstrate the simulation results of the unmanned helicopter flight control a multi-channel visual simulation platform was developed for unmanned helicopter flight control.This platform used three channels to demonstrate the simulation results on a big screen.Visual C++6.0 was used for programming of the software Creator was used to establish unmanned helicopter models and flight scenes and Vega was used to display the visual effect.The system consisted of three computers three projectors and two joysticks which could realize the transmitting and synchronizing of multi-channel visual simulation data.Unmanned helicopter flight on this platform proved that the multi-channel visual simulation system is better than the traditional display of the visual system on visual effect..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 57 (2013)
Fast Hologram Generation Based on Parallel Computing
FU Shenghao, WANG Yuanqing, BAO Xuliang, and FAN Kefeng
Fast hologram generation is the key for the study on Computer Generated Hologram (CGH).In order to accelerate the generation speed of CGH a fast scheme based on Cuda parallel computing was proposed.Firstly the objects were sampled by means of OpenGL depth buffer and objects points set was acquired.Then with the optimizFast hologram generation is the key for the study on Computer Generated Hologram (CGH).In order to accelerate the generation speed of CGH a fast scheme based on Cuda parallel computing was proposed.Firstly the objects were sampled by means of OpenGL depth buffer and objects points set was acquired.Then with the optimization of traditional look-up table algorithm storage space was reduced a short look-up table was produced offline and stored in the GPU texture memory.Finally a reasonable parallel computing program was designed to generate CGH.The experimental results showed that the algorithm was effective and feasible and the speed was increased by about forty times with the parallel computing technology.At the same time the use of OpenGL provided an idea for computer-generated interactive holograms..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 61 (2013)
Design of a Compact Catadioptric Optical System for HMDs
ZHOU Liang, KANG Mingwu, LI Xiaoxia, and LI Wenqiang
The Helmet-Mounted Displays (HMDs) are becoming compact and lightweight in recent years.To meet the requirement of it a compact catadioptric optical system was designed.The prism was thinner than before by reducing the obliquity of beam splitter.Doublet and aspheric surface were introduced into the system to correct thThe Helmet-Mounted Displays (HMDs) are becoming compact and lightweight in recent years.To meet the requirement of it a compact catadioptric optical system was designed.The prism was thinner than before by reducing the obliquity of beam splitter.Doublet and aspheric surface were introduced into the system to correct the chromatic aberration and other aberrations effectively.All the elements were agglutinated to make it compact and easy for assembly and adjustment.The designed technical specifications of the optical system are:FOV of 27°×20.4° exit pupil distance of 25 mm exit pupil diameter of 12 mm back focal length more than 5 mm Modulation Transfer Function (MTF) higher than 0.5 at the frequency of 40 lp/mm and the distortion was less than 0.5%.The results show that the optical system has a fine performance and can meet the aberration characteristics demands of eyepieces.The system can be widely used in various fields of virtual reality..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 65 (2013)
Fluent/Simulink Collaborative Simulation for Missile Separating from Cavity
TANG Shangqin, HUANG Changqiang, and YONG Mingyuan
In order to solve the dynamic and kinematic tight coupled problem existed during missile separating from cavity and in order to acquire accurate trajectory parameters for control system a parallel collaborative simulation platform was established based on Fluent and Simulink.The Journal file of Fluent and S-function ofIn order to solve the dynamic and kinematic tight coupled problem existed during missile separating from cavity and in order to acquire accurate trajectory parameters for control system a parallel collaborative simulation platform was established based on Fluent and Simulink.The Journal file of Fluent and S-function of Simulink were adopted and the data interface between Fluent and Simulink was developed by sharing data file.The missile′s rudder control model was established.The aerodynamic characteristics and trajectory characteristics during missile separating from cavity were simulated under uncontrolled and closed-loop controlled conditions.The simulation results verify the feasibility of parallel collaborative simulation and show that rudder control method can effectively improve the ballistic trajectory characteristics when missile separating from cavity..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 69 (2013)
Flight Recording System of Civil Aircraft
WANG Wei, and FEI Yi
From the viewpoint of application of Flight Recording System (FRS) on civil aircraft an introduction is given to constitution configuration requirements of function and so on of FRS and the basic principle of FRS design and installation is presented as well.A detail description is made on the new generation of FRS for From the viewpoint of application of Flight Recording System (FRS) on civil aircraft an introduction is given to constitution configuration requirements of function and so on of FRS and the basic principle of FRS design and installation is presented as well.A detail description is made on the new generation of FRS for civil aircrafts and it is indicated that the development trend of FRS on future civil aircraft is integrating and synthesizing..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 73 (2013)
A Long-Wave Infrared Dual-FOV Scanning Optical System
QIAO Mingxia, and ZENG Wei
A long-wave infrared (LWIR) dual-field scanning optical system is introduced.The design model of dual-field scanning optical system is depicted.Through the oscillating mirror scanning the field of view (FOV) is enlarged.By inserting vertically a set of lens in the system the dual-FOV design for 2.5 zoom ratio is realizA long-wave infrared (LWIR) dual-field scanning optical system is introduced.The design model of dual-field scanning optical system is depicted.Through the oscillating mirror scanning the field of view (FOV) is enlarged.By inserting vertically a set of lens in the system the dual-FOV design for 2.5 zoom ratio is realized.The F number is 1.67 and the scanning angle of the oscillating mirror is ±6.5°.The optical system is designed by using two common optical materials Ge and ZnS.The aberration can be well corrected by use of non-spherical technology.The MTF approaches the diffractive limit and the system has fine image quality in the temperature range from -40 ℃ to 60 ℃.It can be used in the electro-optical system onboard the aircrafts and ground vehicles..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 77 (2013)
On the Request Routing Algorithm in Onboard Video-on-Demand Service
WAN Jianxiong, XIANG Xudong, and CHEN Xin
In this paper we investigate the request routing problem in the onboard Video-on-Demand (VoD) service which is a key to provide good user experience. We model the system as a controlled queuing system including a dispatcher and several VoD servers. The system is formulated by Markov Decision Process (MDP). Since the MDIn this paper we investigate the request routing problem in the onboard Video-on-Demand (VoD) service which is a key to provide good user experience. We model the system as a controlled queuing system including a dispatcher and several VoD servers. The system is formulated by Markov Decision Process (MDP). Since the MDP formulation suffers from the so-called “the curse of dimensionality” problem we then develop a greedy heuristic approximate algorithm which is simple and can be implemented online.The effectiveness of the approximation algorithm is evaluated through extensive simulations..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 81 (2013)
Application of Time-Optimal and Fuzzy PID Control in Double Wedge Prism Scanning
SUN Huihui, RAN Chengping, and SHI Guangyu
In order to change the line of sight and enlarge the detection scope the double wedge prism scanning system requires to rotate a large angle rapidly.A control strategy combining time-optimal control with fuzzy PID (Proportional Integral Differential) control was proposed.The time-optimal control was used for eliminatinIn order to change the line of sight and enlarge the detection scope the double wedge prism scanning system requires to rotate a large angle rapidly.A control strategy combining time-optimal control with fuzzy PID (Proportional Integral Differential) control was proposed.The time-optimal control was used for eliminating the large angle deviation in the shortest time; and fuzzy PID control which has high precision and small overshoot was used for improving the static and dynamic performance of the system.Experimental results show that the controlled system has high performance robustness which can realize fast and accurate positioning on the double wedge prism and improve the anti-jamming capability.At the same time the control scheme can be extended to apply to other servo systems with the characteristics easy to handle..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 84 (2013)
Iterative Learning Control of Electric Controlled Loading System of Flight Simulator
DUAN Yongsheng, LU Ying, REN Beibei, and YAN Liang
The purpose of this paper is to enhance the tracking accuracy and dynamic performance of electric controlled loading system.Firstly the composition and working principle of electric controlled loading system were described and the system mathematical model was established.An Iterative Learning Control (ILC) & feed-The purpose of this paper is to enhance the tracking accuracy and dynamic performance of electric controlled loading system.Firstly the composition and working principle of electric controlled loading system were described and the system mathematical model was established.An Iterative Learning Control (ILC) & feed-forward compensation composite control strategy was proposed on the basis of the dual loops of current and velocity.At last step response and sinusoidal response signals were used to test the control strategy.The results indicated that the compound control method can improve the system tracking accuracy and improve the dynamic performance which can find application in practical load control systems..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 89 (2013)
On Protocol of the ARINC 659 Backplane Data Bus
ZHANG Ximin
ARINC 659 backplane data bus is a fault tolerant cabinet backplane bus with high level reliability.It is a key component of the integrated modular avionics as defined in ARINC Report 651.The requirements of the integrated modular avionics to the backplane data bus are presented.The ARINC Specification 659 is expatiatedARINC 659 backplane data bus is a fault tolerant cabinet backplane bus with high level reliability.It is a key component of the integrated modular avionics as defined in ARINC Report 651.The requirements of the integrated modular avionics to the backplane data bus are presented.The ARINC Specification 659 is expatiated including the system architecture the media access protocol synchronization and bus coding.The analysis of the determinism the fault tolerance and the coding characteristics are given.ARINC 659 supports robust time and space partition and has perfect fault tolerant performance.It is of great benefit for the development and the certification of the integrated modular avionics..
Electronics Optics & Control
- Publication Date: Mar. 27, 2013
- Vol. 20, Issue 3, 93 (2013)
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