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

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Analysis of hydraulic servo loading system for high-speed bearing in ultra-low temperature environment 超低温环境下高速轴承液压伺服加载系统分析
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7829034
L. Yongguang, Hu Hui, Zhang Hengzhen
In ultra-low temperature environment, the mechanical properties of bearing rotating in high speed change a lot, which has a great influence on the operation of machinery. To test the fatigue properties of air bearing, a hydraulic servo loading system for high-speed bearing in ultra-low temperature is designed and analyzed. According to the requirements of loading environment, this paper first designs a hydraulic servo loading system which could overcome the influence of high frequency disturbance. Then the components are selected with the related parameters in the hydraulic system calculated. Finally the simulation and analysis of the hydraulic system are carried out to verify the feasibility of the design by the AMESim software. All the research results above could provide reference for tests of aerospace high-speed bearing and designs of some other relevant hydraulic systems.
在超低温环境下,高速旋转的轴承的力学性能变化很大,对机械的运行有很大的影响。为了测试空气轴承的疲劳性能,设计并分析了超低温下高速轴承液压伺服加载系统。根据加载环境的要求,本文首先设计了一种能够克服高频干扰影响的液压伺服加载系统。然后选择元件,并计算液压系统的相关参数。最后利用AMESim软件对液压系统进行了仿真分析,验证了设计的可行性。上述研究成果可为航空航天高速轴承的试验及其它相关液压系统的设计提供参考。
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引用次数: 0
Entry trajectory optimization for hypersonic vehicle based on time-scales separation guidance with waterweeds algorithm 基于水草算法时标分离制导的高超声速飞行器进入弹道优化
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7828785
Xudong Liu, Lin Cheng, Qingzhen Zhang, Lingtong Jiang
This paper focuses on the hypersonic vehicle in consideration of oscillation and aerodynamic heating problems during reentry process, for trajectory optimization, penalty function method and ε level comparison are introduced for transforming the unconstrained waterweeds algorithm into constrained algorithm to solve multi-objective optimization problems, in which a novel and more precise criterion based on time-scales separation guidance for oscillation optimization is put forward indicating waterweeds algorithm to get a better optimal result. The algorithm transformed is successfully applied to trajectory design.
针对高超声速飞行器在再入过程中考虑振荡和气动加热问题,采用罚函数法和ε水平比较法将无约束水草算法转化为约束算法,求解多目标优化问题。提出了一种新的基于时标分离制导的振动优化准则,表明水草算法能获得更好的优化结果。将变换后的算法成功地应用于轨迹设计。
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引用次数: 3
Integral sliding mode controller design for near space vehicle with input constraints 带输入约束的近空飞行器积分滑模控制器设计
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7828781
Wu Qi, Wang Changqing, Li Aijun, Huang Bin
Near space vehicle (NSV) is a nonlinear, multivariable and strongly coupled system. During the arbitrary trajectory tracking of NSV, the employment of conventional sliding mode variable structure control often results in steady-state errors, if there is some certain external disturbance. In this paper, an integral sliding mode variable structure controller is designed to eliminate the steady state error. Since the inputs of most actuators are restricted, the control performance will deteriorate or fail when the control signals are input directly into the controlled object. Therefore, the saturation limit is introduced to the controller design process to limit the input. Finally the proposed control scheme is applied to the attitude motion mode of the NSV and the simulation results confirmed its effect.
近空飞行器是一个非线性、多变量、强耦合的系统。在非源车辆的任意轨迹跟踪过程中,如果存在一定的外部干扰,采用传统的滑模变结构控制往往会导致稳态误差。本文设计了一种积分滑模变结构控制器来消除稳态误差。由于大多数执行器的输入是受限的,当控制信号直接输入被控对象时,控制性能会变差或失效。因此,在控制器设计过程中引入饱和限制来限制输入。最后将所提出的控制方案应用于非对称车的姿态运动模式,仿真结果验证了其效果。
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引用次数: 1
Parameters identification of gyroplane longitudinal/lateral model from flight test 旋翼机纵向/横向飞行试验模型参数辨识
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7828801
Xiaoqian Cheng, Ran Xin, Guoning Bao, D. Luo, Zhiming Guo, Liaoni Wu
This paper presents the linear modelling of the gyroplane by the parameters identificaton method using the flight test data of a gyroplane. In recent years, unique advantages of gyroplanes have just been discovered, making it valuable in military or civilian fields. The research about unmanned gyroplanes has been initiated recently. The difficulty, which greatly impedes the research of unmanned gyroplanes, is the nonexistence of dynamic model. To solve this problem, the aerodynamic parameters indentification, based on actual flight test data in the manned gyroplane, is required. In order to get aerodynamic parameters of the linear dynamic model of the gyroplane, flight synchronous acquisition system was designed and established. Repeated flight tests based on excitation signal 211, was conducted. Through operation excitation, sufficient information was obtained to estimate parameters. Equation error method in frequency-domain was used to identify gyroplane aerodynamic parameters. The fitting degree between the flight test data and the responses of identified model proves the reliability of the the identified model. The degree of dispersion of multiple identification results characterizes recognition accuracy. Finally, based on the analysis of object properties, control law design was then carried out and the transformation from manned to unmanned control of gyroplane was therefore completed.
利用某型旋翼机的飞行试验数据,采用参数辨识方法对旋翼机进行了线性建模。近年来,旋翼机独特的优点被人们发现,使其在军事和民用领域都有很大的应用价值。关于无人旋翼机的研究是近年来才开始的。动力学模型的不存在是阻碍无人旋翼机研究的一大难点。为了解决这一问题,需要基于载人旋翼机实际飞行试验数据进行气动参数辨识。为了获得旋翼机线性动力学模型的气动参数,设计并建立了飞行同步采集系统。基于211激励信号进行了多次飞行试验。通过运行激励,获得足够的信息进行参数估计。采用频域方程误差法辨识旋翼机气动参数。飞行试验数据与识别模型响应的拟合程度证明了识别模型的可靠性。多个识别结果的离散程度决定了识别的准确性。最后,在分析目标特性的基础上,进行控制律设计,完成旋翼机由有人控制向无人控制的转变。
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引用次数: 2
Improved digital model of parafoil-unmanned aerial vehicle accurate recycling system 改进的伞-无人机精确回收系统数字模型
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7829072
Mingjun Li, Jianguo Yan, Yuan Liu
Using parachute to recycle the air-mid load is widely adopted by medium-sized unmanned air vehicles to landing, however the uncontrolled landing location results in lower recovery efficiency. By using Parafoil-UAV recovery system, UAV can land at a smaller scope around the target location accurately. The theoretical research foundation of control block and digital validation platform of Parafoil-UAV system are based on the digital model of the system. This paper presents an improved method to build the digital model: the method to calculating the apparent mass and rotational inertial of the parafoil; Based on the CFD method, aerodynamic coefficients of specified parafoil can be obtained by aerodynamic performance tests; Using infinitesimal method to calculate the aerodynamic forces and moment of the canopy accurately. For Parafoil-UAV system, forces analysis is conducted to the overall system first and then to the single block, and according to kinematic equations, the 9-DOF digital model is established in Matlab/Simulink platform. Through the digital model, the major forms of motions such as gliding, turning and flared landing can be simulated successfully, and the trajectory of the system under the control inputs can also be obtained.
利用降落伞回收空中载荷是中型无人机广泛采用的着陆方式,但着陆位置不受控制导致回收效率较低。利用伞翼-无人机回收系统,无人机可以在目标位置周围较小范围内精确着陆。降落伞-无人机系统的控制模块和数字验证平台的理论研究基础是基于系统的数字模型。本文提出了一种建立数字模型的改进方法:计算翼伞的表观质量和旋转惯性的方法;基于CFD方法,通过气动性能试验获得指定翼伞的气动系数;采用无穷小法精确计算了伞盖的气动力和弯矩。对于伞伞-无人机系统,首先对整个系统进行受力分析,然后对单个块体进行受力分析,根据运动学方程,在Matlab/Simulink平台上建立9自由度数字模型。通过数字模型,成功地模拟了滑翔、转弯、喇叭降落等主要运动形式,并得到了系统在控制输入下的运动轨迹。
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引用次数: 4
Design of real-time measurement system with Vision/IMU for close-range semi-physical rendezvous and docking simulation 基于Vision/IMU的近距离半物理交会对接仿真实时测量系统设计
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7829149
Zhenshen Qu, X. Chu, Mengyu Fu, Xiaokai Liu, Weinan Xie, Changhong Wang
Design of a real-time measurement system based on information fusion of Vision Measurement Unit (VMU) and Inertial Measurement Unit (IMU) is proposed for a semi-physical simulation system. Main contributions of the paper are the design and application of VMU-IMU integration to the real-time simulation of close-range rendezvous and docking (RVD) in lunar orbit. Structure and each component of the system are presented. The pose (position and attitude) filters utilized for information fusion within Kalman filter (KF) framework are designed, which regard Hill equations and quaternion differential equations as process models respectively and choose relative pose of two spacecraft as measure variables. Capabilities of the real-time measurement system are demonstrated by semi-physical closed-loop simulations, which show the proposed system yields more precise navigation result and more effective preservation of energy than an independent VMU.
针对半物理仿真系统,提出了一种基于视觉测量单元(VMU)和惯性测量单元(IMU)信息融合的实时测量系统设计。本文的主要贡献是VMU-IMU集成在月球轨道近距离交会对接(RVD)实时仿真中的设计和应用。介绍了系统的结构和各组成部分。设计了在卡尔曼滤波(KF)框架内用于信息融合的位姿(位置和姿态)滤波器,分别以希尔方程和四元数微分方程为过程模型,以两个航天器的相对位姿为测量变量。通过半物理闭环仿真验证了实时测量系统的功能,结果表明该系统比独立的VMU具有更精确的导航结果和更有效的能量保存。
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引用次数: 2
The top-level design study for the automatic carrier landing system 航母自动着舰系统顶层设计研究
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7829047
Lu Keke, Yu Jinyong, Kou Kunhu
This paper focused on the top-level design of the automatic carrier landing system. The carrier platform and carrier-based aircraft landing technology in China have been mature and stable now, in this case, to develop the automatic carrier landing system and to put it into use will greatly enhance the operational capability of the aircraft carrier. In this paper, based on the researches related on automatic carrier landing system that the United States has been proven, the needs of carrier-based aircraft automatic landing technology is analyzed, then the top-level research and design for the system functions and composition are made based on the system requirements. The contents of this paper will provide a reference for the subsequent development of the automatic landing system.
本文重点研究了航母自动着舰系统的顶层设计。目前中国的航母平台和舰载机起降技术已经成熟稳定,在这种情况下,研制航母自动起降系统并投入使用,将大大提高航母的作战能力。本文在借鉴美国对舰载机自动着舰系统相关研究成果的基础上,分析了舰载机自动着舰技术的需求,并根据系统需求对系统功能和组成进行了顶层研究和设计。本文的研究内容将为后续自动着陆系统的开发提供参考。
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引用次数: 0
Dipolar field based 3-dimensional homing guidance algorithm for autonomous underwater vehicles 基于偶极场的自主水下航行器三维寻的制导算法
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7828946
Yong Li, Weisheng Yan, Jian Gao, Beibei Qi
In this paper, a dipolar field-based 3-dimensional homing guidance method is presented to solve the intelligent docking problem of an autonomous underwater vehicle (AUV). The AUV obtains its coordinates in the global coordinate frame by using the measured locations of transponders fixed in the dock station. The desired yaw and pitch angles based on the dipolar field are calculated to guide the AUV to the dock station along the direction of the entrance central axis. The adaptive non-singular terminal sliding mode control is employed for the yaw control and the pitch control, which ensures the robustness and adaptability in the presence of the control system uncertainties. Simulation results are provided to validate the effectiveness of the proposed homing guidance strategy.
针对自主水下航行器(AUV)的智能对接问题,提出了一种基于偶极场的三维寻的制导方法。AUV利用固定在船坞站的应答器的测量位置获得其在全球坐标系中的坐标。基于偶极场计算所需的偏航角和俯仰角,引导水下航行器沿入口中轴线方向到达码头站。偏航和俯仰控制采用自适应非奇异终端滑模控制,保证了控制系统存在不确定性时的鲁棒性和自适应性。仿真结果验证了所提寻的制导策略的有效性。
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引用次数: 2
Unconventional roll axis response-type Nonlinear Dynamic Inversion flight control law design 非常规横摇轴响应型非线性动态反演飞行控制律设计
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7828939
Youguang Guo, Ting Yue, Lixin Wang
To avoid the singular problems in the roll axis of Nonlinear Dynamic Inversion (NDI) flight control law with common roll axis response-type, the design of a NDI flight control law with the roll axis response-type of wind-axis roll rate is discussed. Furthermore, a new slow dynamics is used inside the outer loop controller. Reference model and PI compensator are used to generate the command for outer loop controller. The control law and its performance are evaluated on a nonlinear dynamic model of an F-16 aircraft. And the new response-type is shown to yield better tacking performance by comparing with the two conventional response-types in a combined maneuver of Split-S and Cobra.
为避免普通横摇响应型非线性动态反演(NDI)飞行控制律的横摇轴奇异性问题,讨论了以风轴横摇率为横摇响应型的NDI飞行控制律的设计。此外,外环控制器内部还采用了一种新的慢动态控制器。采用参考模型和PI补偿器生成外环控制器指令。在F-16飞机的非线性动力学模型上对控制律及其性能进行了评价。在Split-S和Cobra的联合机动中,与传统的两种响应类型进行了比较,结果表明该响应类型具有更好的跟踪性能。
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引用次数: 4
A method for predicting aviation equipment failures based on degradation-track similarity 基于退化航迹相似度的航空设备故障预测方法
Pub Date : 2016-08-01 DOI: 10.1109/CGNCC.2016.7829006
Zhao Xin, Xiao Ming-qing, Xie Yi-wang-lang, Huang Han-qiao, Cao Wei
The framework of similarity-based prognostics was presented, which takes advantage of system 's training instances' degradation trajectory and run-to-failure time to predict the remaining useful life(RUL) of test instances. Degradation models are extracted from time series data of training instances. Similarity between time series data of test instance and degradation model is calculated by likelihood function. RUL value according to the degradation model is then estimated at the best matched time stamp. RUL values weighted by similarities are fused by kernel density estimation to form the final probability density of the RUL of test instance. Results of aviation equipment simulation experiments show that the similarity-based RUL prediction performs better in accuracy and convergency.
提出了基于相似性的预测框架,利用系统训练实例的退化轨迹和运行失效时间来预测测试实例的剩余使用寿命。从训练实例的时间序列数据中提取退化模型。利用似然函数计算测试实例的时间序列数据与退化模型的相似度。然后根据退化模型在最佳匹配的时间戳处估计RUL值。通过核密度估计对相似度加权后的RUL值进行融合,形成测试实例RUL的最终概率密度。航空装备仿真实验结果表明,基于相似度的RUL预测具有较好的精度和收敛性。
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引用次数: 3
期刊
2016 IEEE Chinese Guidance, Navigation and Control Conference (CGNCC)
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