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Method of SLAS's ground track manipulation based on tangential impulse thrust 基于切向脉冲推力的SLAS地面航迹操纵方法
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000125
Le Xinlong;Cao Xibin;Dai Yu;Wu Fan
Satellites with altitudes below 400 km are called super low altitude satellites (SLAS), often used to achieve responsive imaging tasks. Therefore, it is important for the manipulation of its ground track. Aiming at the problem of ground track manipulation of SLAS, a control method based on tangential impulse thrust is proposed. First, the equation of the longitude difference between SLAS and the target point on the target latitude is derived based on Gauss's variational equations. On this basis, the influence of the tangential impulse thrust on the ground track's longitude is derived. Finally, the method for ground track manipulation of SLAS under the tangential impulse thrust is proposed. The simulation results verify the effectiveness of the method, after manipulation, the satellite can visit the target point and revisit it for multiple days.
高度低于400公里的卫星被称为超低空卫星(SLAS),通常用于实现响应成像任务。因此,对其地面轨迹的操纵具有重要意义。针对SLAS地面航迹操纵问题,提出了一种基于切向脉冲推力的控制方法。首先,基于高斯变分方程,推导了SLAS与目标纬度上目标点的经度差方程。在此基础上,推导了切向脉冲推力对地面轨道经度的影响。最后,提出了在切向脉冲推力作用下SLAS地面轨迹操纵的方法。仿真结果验证了该方法的有效性,操纵后卫星可以访问目标点并重访多日。
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引用次数: 0
Strategy dominance mechanism of autonomous collaboration in unmanned swarm within the framework of public goods game 公共产品博弈框架下无人集群自主协作的策略主导机制
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000131
Pan Li;Wu Zhonghong;Yu Minggang;Liu Jintao;Mei Dan
The key advantage of unmanned swarm operation is its autonomous cooperation. How to improve the proportion of cooperators is one of the key issues of autonomous collaboration in unmanned swarm operations. This work proposes a strategy dominance mechanism of autonomous collaboration in unmanned swarm within the framework of public goods game. It starts with the requirement analysis of autonomous collaboration in unmanned swarm; and an aspiration-driven multiplayer evolutionary game model is established based on the requirement. Then the average abundance function and strategy dominance condition of the model are constructed by theoretical derivation. Furthermore, the evolutionary mechanism of parameter adjustment in swarm cooperation is revealed via simulation, and the influences of the multiplication factor r, aspiration level a, threshold $m$ and other parameters on the strategy dominance conditions were simulated for both linear and threshold public goods games (PGGs) to determine the strategy dominance characteristics; Finally, deliberate proposals are suggested to provide a meaningful exploration in the actual control of unmanned swarm cooperation.
无人集群操作的关键优势在于其自主协作。如何提高协作者的比例是无人机群自主协作的关键问题之一。本文在公共产品博弈的框架下,提出了无人集群中自主协作的策略主导机制。首先对无人集群中的自主协作进行了需求分析;并在此基础上建立了基于愿望驱动的多人进化游戏模型。然后通过理论推导,构造了该模型的平均丰度函数和策略优势条件。此外,通过仿真揭示了群体合作中参数调整的演化机制,并在线性和阈值公共产品博弈中模拟了乘数r、期望水平a、阈值$m$等参数对策略优势条件的影响,以确定策略优势特征;最后,提出了一些有意义的建议,为无人集群协作的实际控制提供了有意义的探索。
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引用次数: 0
Radar emitter signal recognition method based on improved collaborative semi-supervised learning 基于改进的协同半监督学习的雷达辐射源信号识别方法
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000126
Jin Tao;Zhang Xindong
Rare labeled data are difficult to recognize by using conventional methods in the process of radar emitter recognition. To solve this problem, an optimized cooperative semisupervised learning radar emitter recognition method based on a small amount of labeled data is developed. First, a small amount of labeled data are randomly sampled by using the bootstrap method, loss functions for three common deep learning networks are improved, the uniform distribution and cross-entropy function are combined to reduce the overconfidence of softmax classification. Subsequently, the dataset obtained after sampling is adopted to train three improved networks so as to build the initial model. In addition, the unlabeled data are preliminarily screened through dynamic time warping (DTW) and then input into the initial model trained previously for judgment. If the judgment results of two or more networks are consistent, the unlabeled data are labeled and put into the labeled data set. Lastly, the three network models are input into the labeled dataset for training, and the final model is built. As revealed by the simulation results, the semi-supervised learning method adopted in this paper is capable of exploiting a small amount of labeled data and basically achieving the accuracy of labeled data recognition.
在雷达辐射源识别过程中,使用常规方法很难识别出稀有的标记数据。为了解决这个问题,提出了一种基于少量标记数据的优化协同半监督学习雷达辐射源识别方法。首先,使用bootstrap方法对少量标记数据进行随机采样,改进了三种常见深度学习网络的损失函数,将均匀分布和交叉熵函数相结合,减少了softmax分类的过度自信。随后,采用采样后获得的数据集对三个改进的网络进行训练,以建立初始模型。此外,通过动态时间扭曲(DTW)对未标记的数据进行初步筛选,然后输入到先前训练的初始模型中进行判断。如果两个或多个网络的判断结果一致,则对未标记的数据进行标记,并将其放入标记的数据集中。最后,将三个网络模型输入到标记的数据集中进行训练,并建立最终的模型。仿真结果表明,本文采用的半监督学习方法能够利用少量的标记数据,基本上达到了标记数据识别的准确性。
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引用次数: 0
Research on strategic risk identification method of equipment system development based on system dynamics 基于系统动力学的装备系统开发战略风险识别方法研究
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000124
Wang Xinfeng;Wang Tao;Zhou Xin;Wang Yanfeng
Strategic management of equipment system development must attach importance to effective strategic risk management. Aiming at the identification of strategic risk of equipment system development, firstly, the source of strategic risk of equip-ment system development is analyzed and classified. Based on this, a causal loop diagram of strategic risk of equipment system development based on system dynamics is established. The system dynamics analysis software Vensim PLE is used to carry out the risk influencing factors analysis, risk consequences analysis, risk feedback loop identification and corresponding pre-control measures, and achieves a good risk identification effect.
装备系统开发的战略管理必须重视有效的战略风险管理。针对装备系统开发的战略风险识别,首先对装备系统开发战略风险的来源进行了分析和分类。在此基础上,建立了基于系统动力学的装备系统开发战略风险因果循环图。系统动力学分析软件Vensim PLE用于进行风险影响因素分析、风险后果分析、风险反馈回路识别和相应的预控措施,取得了良好的风险识别效果。
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引用次数: 0
Attention mechanism based multi-scale feature extraction of bearing fault diagnosis 基于注意机制的轴承故障诊断多尺度特征提取
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000129
Lei Xue;Lu Ningyun;Chen Chuang;Hu Tianzhen;Jiang Bin
Effective bearing fault diagnosis is vital for the safe and reliable operation of rotating machinery. In practical applications, bearings often work at various rotational speeds as well as load conditions. Yet, the bearing fault diagnosis under multiple conditions is a new subject, which needs to be further explored. Therefore, a multi-scale deep belief network (DBN) method integrated with attention mechanism is proposed for the purpose of extracting the multi-scale core features from vibration signals, containing four primary steps: preprocessing of multi-scale data, feature extraction, feature fusion, and fault classification. The key novelties include multi-scale feature extraction using multiscale DBN algorithm, and feature fusion using attention mechanism. The benchmark dataset from University of Ottawa is applied to validate the effectiveness as well as advantages of this method. Furthermore, the aforementioned method is compared with four classical fault diagnosis methods reported in the literature, and the comparison results show that our proposed method has higher diagnostic accuracy and better robustness.
有效的轴承故障诊断对旋转机械的安全可靠运行至关重要。在实际应用中,轴承通常在不同的转速和负载条件下工作。然而,多工况下的轴承故障诊断是一个新的课题,需要进一步探索。因此,提出了一种结合注意力机制的多尺度深度信念网络(DBN)方法,用于从振动信号中提取多尺度核心特征,包括四个主要步骤:多尺度数据的预处理、特征提取、特征融合和故障分类。关键的创新包括使用多尺度DBN算法的多尺度特征提取和使用注意力机制的特征融合。应用渥太华大学的基准数据集验证了该方法的有效性和优点。此外,将上述方法与文献中报道的四种经典故障诊断方法进行了比较,比较结果表明,我们提出的方法具有更高的诊断精度和更好的鲁棒性。
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引用次数: 0
Reliability analysis for wireless communication networks via dynamic Bayesian network 基于动态贝叶斯网络的无线通信网络可靠性分析
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000130
Yang Shunqi;Zeng Ying;Li Xiang;Li Yanfeng;Huang Hongzhong
The dynamic wireless communication network is a complex network that needs to consider various influence factors including communication devices, radio propagation, network topology, and dynamic behaviors. Existing works focus on suggesting simplified reliability analysis methods for these dynamic networks. As one of the most popular modeling methodologies, the dynamic Bayesian network (DBN) is proposed. However, it is insufficient for the wireless communication network which contains temporal and non-temporal events. To this end, we present a modeling methodology for a generalized continuous time Bayesian network (CTBN) with a 2-state conditional probability table (CPT). Moreover, a comprehensive reliability analysis method for communication devices and radio propagation is suggested. The proposed methodology is verified by a reliability analysis of a real wireless communication network.
动态无线通信网络是一个复杂的网络,需要考虑各种影响因素,包括通信设备、无线电传播、网络拓扑和动态行为。现有工作的重点是为这些动态网络提出简化的可靠性分析方法。作为最流行的建模方法之一,提出了动态贝叶斯网络(DBN)。然而,对于包含时间和非时间事件的无线通信网络来说,这是不够的。为此,我们提出了一种具有两状态条件概率表(CPT)的广义连续时间贝叶斯网络(CTBN)的建模方法。此外,还提出了一种针对通信设备和无线电传播的综合可靠性分析方法。通过对实际无线通信网络的可靠性分析,验证了所提出的方法。
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引用次数: 0
Robust dual-channel correlation algorithm for complex weak target detection with wideband radar 宽带雷达复杂弱目标检测的鲁棒双通道相关算法
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000138
Dai Yan;Liu Dan;Li Chuanming;Wei Shaopeng;Hu Qingrong
In the scene of wideband radar, due to the spread of target scattering points, the attitude and angle of view of the target constantly change in the process of moving. It is difficult to predict, and the actual echo of multiple scattered points is not fully matched with the transmitted signal. Therefore, it is challenging for the traditional matching filter method to achieve a complete matching effect in wideband echo detection. In addition, the energy dispersion of complex target echoes is still a problem in radar target detection under broadband conditions. Therefore, this paper proposes a wideband target detection method based on dual-channel correlation processing of rangeextended targets. This method fully uses the spatial distribution characteristics of target scattering points of echo signal and the matching characteristics of the dual-channel point extension function itself. The radial accumulation of wideband target echo signal in the complex domain is realized through the adaptive correlation processing of a dual-channel echo signal. The accu-mulation effect of high matching degree is achieved to improve the detection probability and the performance of wideband detection. Finally, electromagnetic simulation experiments and measured data verify that the proposed method has the advan-tages of high signal to noise ratio (SNR) gain and high detection probability under low SNR conditions.
在宽带雷达场景中,由于目标散射点的分布,目标在移动过程中姿态和视角不断变化。这很难预测,并且多个散射点的实际回波与发射信号并不完全匹配。因此,在宽带回波检测中,传统的匹配滤波器方法要实现完全的匹配效果是具有挑战性的。此外,在宽带条件下,复杂目标回波的能量色散仍然是雷达目标检测中的一个问题。因此,本文提出了一种基于测距目标双通道相关处理的宽带目标检测方法。该方法充分利用了回波信号目标散射点的空间分布特性和双通道点扩展函数本身的匹配特性。通过对双通道回波信号的自适应相关处理,实现了宽带目标回波信号在复域中的径向积累。实现了高匹配度的积累效果,提高了检测概率和宽带检测性能。最后,电磁仿真实验和实测数据验证了该方法在低信噪比条件下具有高信噪比增益和高检测概率的优点。
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引用次数: 0
LSTM-DPPO based deep reinforcement learning controller for path following optimization of unmanned surface vehicle 基于LSTM-DPPO的无人机路径跟踪优化深度强化学习控制器
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000113
Xia Jiawei;Zhu Xufang;Liu Zhong;Xia Qingtao
To solve the path following control problem for unmanned surface vehicles (USVs), a control method based on deep reinforcement learning (DRL) with long short-term memory (LSTM) networks is proposed. A distributed proximal policy optimization (DPPO) algorithm, which is a modified actorcritic-based type of reinforcement learning algorithm, is adapted to improve the controller performance in repeated trials. The LSTM network structure is introduced to solve the strong temporal correlation USV control problem. In addition, a specially designed path dataset, including straight and curved paths, is established to simulate various sailing scenarios so that the reinforcement learning controller can obtain as much handling experience as possible. Extensive numerical simulation results demonstrate that the proposed method has better control performance under missions involving complex maneuvers than trained with limited scenarios and can potentially be applied in practice.
为了解决无人水面车辆的路径跟踪控制问题,提出了一种基于长短期记忆网络的深度强化学习控制方法。分布式近端策略优化(DPPO)算法是一种改进的基于actor-critic的强化学习算法,适用于在重复试验中提高控制器性能。引入LSTM网络结构来解决强时间相关性USV控制问题。此外,还建立了一个专门设计的路径数据集,包括直线路径和曲线路径,以模拟各种航行场景,使强化学习控制器能够获得尽可能多的处理经验。大量的数值模拟结果表明,与在有限场景下训练的方法相比,该方法在复杂机动任务下具有更好的控制性能,并有可能在实践中应用。
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引用次数: 0
Research on agile space emergency launching mission planning simulation and verification method 敏捷空间应急发射任务规划仿真验证方法研究
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000067
Wu Feng;Liu Xiuluo;Wang Jia;Li Chao;Liu Ying;Su Jianbin;Zhang Ailiang;Wang Min
Space emergency launching is to send a satellite into space by using a rapid responsive solid rocket in the bounded time to implement the emergency Earth observation mission. The key and difficult points mainly include the business process construction of launching mission planning, validation of the effectiveness of the launching scheme, etc. This paper proposes the agile space emergency launching mission planning simulation and verification method, which systematically constructs the overall technical framework of space emergency launching mission planning with multi-field area, multi-platform and multi-task parallel under the constraint of resource scheduling for the first time. It supports flexible reconstruction of mission planning processes such as launching target planning, trajectory planning, path planning, action planning and launching time analysis, and can realize on-demand assembly of operation links under different mission scenarios and different plan conditions, so as to quickly modify and generate launching schemes. It supports the fast solution of rocket trajectory data and the accurate analysis of multi-point salvo time window recheck and can realize the fast conflict resolution of launching missions in the dimensions of launching position and launching window sequence. It supports lightweight scenario design, modular flexible simulation, based on launching style, launching platform, launching rules, etc., can realize the independent mapping of mission planning results to two-dimensional and three-dimensional visual simulation models, so as to achieve a smooth connection between mission planning and simulation.
太空紧急发射是利用快速响应的固体火箭在有限的时间内将卫星送入太空,以执行紧急地球观测任务。重点难点主要包括发射任务规划的业务流程建设、发射方案有效性验证等。本文提出了敏捷空间应急发射任务规划仿真验证方法,首次系统构建了在资源调度约束下,多领域、多平台、多任务并行的空间应急发射任务规划总体技术框架。支持灵活重构发射目标规划、轨迹规划、路径规划、行动规划、发射时间分析等任务规划流程,可实现不同任务场景、不同计划条件下操作环节的按需组装,从而快速修改和生成发射方案。它支持火箭弹道数据的快速求解和多点齐射时间窗口复核的精确分析,可以实现发射任务在发射位置和发射窗口序列维度上的快速冲突解决。支持轻量化场景设计、模块化柔性仿真,基于发射样式、发射平台、发射规则等,可以实现任务规划结果到二维、三维可视化仿真模型的独立映射,实现任务规划与仿真的平滑对接。
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引用次数: 0
Scene image recognition with knowledge transfer for drone navigation 基于知识转移的无人机导航场景图像识别
3区 计算机科学 Q3 AUTOMATION & CONTROL SYSTEMS Pub Date : 2023-10-01 DOI: 10.23919/JSEE.2023.000096
Du Hao;Wang Wei;Wang Xuerao;Zuo Jingqiu;Wang Yuanda
In this paper, we study scene image recognition with knowledge transfer for drone navigation. We divide navigation scenes into three macro-classes, namely outdoor special scenes (OSSs), the space from indoors to outdoors or from outdoors to indoors transitional scenes (TSs), and others. However, there are difficulties in how to recognize the TSs, to this end, we employ deep convolutional neural network (CNN) based on knowledge transfer, techniques for image augmentation, and fine tuning to solve the issue. Moreover, there is still a novelty detection problem in the classifier, and we use global navigation satellite systems (GNSS) to solve it in the prediction stage. Experiment results show our method, with a pre-trained model and fine tuning, can achieve 91.3196% top-1 accuracy on Scenes21 dataset, paving the way for drones to learn to understand the scenes around them autonomously.
在本文中,我们研究了无人机导航中具有知识转移的场景图像识别。我们将导航场景分为三个宏类,即室外特殊场景(OS)、从室内到室外或从室外到室内的过渡场景(TS)等。然而,在如何识别TS方面存在困难,为此,我们采用了基于知识转移的深度卷积神经网络(CNN)、图像增强技术和微调来解决这个问题。此外,分类器中仍然存在一个新颖的检测问题,我们在预测阶段使用全球导航卫星系统(GNSS)来解决这个问题。实验结果表明,我们的方法通过预先训练的模型和微调,可以在Scenes21数据集上实现91.3196%的前1级准确率,为无人机学习自主理解周围场景铺平了道路。
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引用次数: 0
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Journal of Systems Engineering and Electronics
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