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Remaining useful life prediction of aircraft lithium-ion batteries based on F-distribution particle filter and kernel smoothing algorithm

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Chinese Journal of Aeronautics 2020年第5期33卷 1517-1531页

作者： Kai ZHANG Peng ZHAO Canfei SUN youren wang Zewang CHEN College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China Aviation Industry Corporation Leihua Electronic Technology Research Institute Wuxi 214000China Testing and Verification Center Aviation Key Laboratory of Science and Technology on Fault Diagnosis and Health ManagementShanghai 201601China

As an emergency and auxiliary power source for aircraft,lithium(Li)-ion batteries are important components of aerospace power *** Remaining Useful Life(RUL)prediction of Li-ion batteries is a key technology to ensure the reliable operation of aviation power *** Filter(PF)is an effective method to predict the RUL of Li-ion batteries because of its uncertainty representation and management ***,there are problems that particle weights cannot be updated in the prediction stage and particles *** settle these issues,an innovative technique of F-distribution PF and Kernel Smoothing(FPFKS)algorithm is *** the prediction stage,the weights of the particles are dynamically updated by the F kernel instead of being fixed all the ***,a first-order independent Markov capacity degradation model is ***,the kernel smoothing algorithm is integrated into PF,so that the variance of the parameters of capacity degradation model keeps *** based on NASA battery data sets show that FPFKS can be excellently applied to RUL prediction of Liion batteries.

关键词： F-distribution Kernel smoothing Lithium-ion batteries Markov model Particle filter Prediction Remaining useful life

A self-healing strategy with fault-cell reutilization of bio-inspired hardware

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Chinese Journal of Aeronautics 2019年第7期32卷 1673-1683页

作者： Zhai ZHANG Yao QIU Xiaoliang YUAN Rui YAO Yan CHEN youren wang College of Automation Engineering Nanjing University of Aeronautics and Astronautics

The self-healing strategy is a key component in designing the bio-inspired embryonics circuit with the structure of cell arrays. However, the existing self-healing strategies of embryonics circuits mainly focus on permanent faults inside the modules of cells such as the function module and the configuration register, while little attention is paid to transient faults. From the point of view of obtaining high efficiency of hardware utilization, it would be a huge waste of hardware resources by permanent elimination when a cell only suffers a transient fault which can be repaired by a configuration mechanism. A new self-healing strategy, the Fault-Cell Reutilization Self-healing Strategy(FCRSS) which presents a method for reusing transient fault cells, is proposed in this paper. The circuit structures of all the modules in the cells are described in detail. In the new strategy, two processes of elimination and reconfiguration are combined. Within the process of fault-cell elimination, cells with transient faults in the embryonics circuit array could be reused simultaneously to replace the functions of the cells on their left side in the same row. Therefore, transient fault-cells in a transparent state can be reconfigured to realize the fault-cell reutilization. Finally,a circuit simulation, resource consumption, a reliability analysis and a detailed normalization analysis are presented. The FCRSS can improve the hardware utilization rate and system reliability at the expense of a small amount of hardware resources and reconfiguration time. Following the conclusion, the method of determining the optimal self-healing strategy is presented according to the environmental conditions.

关键词： Bio-inspired hardware Embryonics Fault-cell reutilization Reliability analysis Self-healing strategy Transient fault

A Vague Decision Method for Analog Circuit Fault Diagnosis Based on Description Sphere

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Chinese Journal of Aeronautics 2011年第6期24卷 768-776页

作者： LUO Hui wang youren CUI Jiang College of A utomation Engineering Nanjing University of A eronauties and Astronautics Nanjing 210016 China

This paper proposes a vague decision method for analog circuit fault diagnosis based on description sphere. Firstly, the proposed method uses the wavelet transform as the preprocessor to extract fault features from the output voltages of the circuit un- der test （CUT）. And then, each class sample is trained to produce a minimum description sphere. Finally, the test samples are detected by a defined vague decision rule, which is based on the vague weight distance between the test data and the center of description sphere. The defined decision rule fuses the truth and false membership degrees of the test sample and the weight of the description sphere, and it can effectively deal with the uncertain information. The reliability of the defined decision rule is proved theoretically. This new diagnostic method is first applied to testing two actual circuits, and then it is compared with other two diagnostic methods. The experimental results show that the proposed technique can achieve good performance and reduce the diagnostic time.

关键词： analog circuits fault detection description sphere vague set multi-class classification

Dynamically Reconfigurable Encryption System of the AES

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1569-1572页

作者： wang youren wang Li YAO Rui ZHANG Zhai CUI Jiang College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 Jiangsu China

Reconfigurable computing has grown to become an important and large field of research, it offers advantages over traditional hardware and software implementations of computational algorithms. The Advanced Encryption Standard （AES） algorithm is widely applied in government department and commerce. This paper analyzed the AES algorithms with different cipher keys, adopted a novel key scheduler that generated the round key real-time, proposed a dynamically reconfigurable encryption system which supported the AES algorithm with different cipher keys, and designed the architecture of the reconfigurable system. The dynamically reconfigurable AES system had been realized on FPGA. The result proves that the reconfigurable AES system is flexible, lower cost and high security level.

关键词： dynamically reconfigurable hardware field programmable gate array (FPGA) advanced encryption standard (AES) algorithm cipher key

Testing Cross-Talk Induced Delay Faults in Digital Circuit Based on Transient Current Analysis

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Wuhan University Journal of Natural Sciences 2006年第6期11卷 1445-1448页

作者： wang youren DENG Xiaoqian CUI Jiang YAO Rui ZHANG Zhai College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 Jiangsu China

The delay fault induced by cross-talk effect is one of the difficult problems in the fault diagnosis of digital circuit. An intelligent fault diagnosis based on IDDT testing and support vector machines （SVM） classifier was proposed in this paper. Firstly, the fault model induced by cross-talk effect and the IDDT testing method were analyzed, and then a delay fault localization method based on SVM was presented. The fault features of the sampled signals were extracted by wavelet packet decomposition and served as input parameters of SVM classifier to classify the different fault types. The simulation results illustrate that the method presented is accurate and effective, reaches a high diagnosis rate above 95%.

关键词： delay fault cross-talk fault localization digital circuit IDDT SVM

Design of Embryo-electronic Systems Capable of Self-diagnosing and Self-healing and Configuration Control

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Chinese Journal of Aeronautics 2009年第6期22卷 637-643页

作者： Xu Guili Xia Zhenghao wang Haibin Zhang Zhai wang youren College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

As aerospace vehicles travel in a hellish environment, the reliability of the measuring and controlling systems has played a critical role in the credibility of a whole airborne system. Embryo-electronic system is a bionic hardware capable of self-diagnosing and self-healing. This article presents a new approach to design embryo-electronic systems and introduces their bionic principles, system structures and fanlt-tolerant mechanism. As the current methods cannot meet the requirements for large-scale embryo-electronic systems, this article advances a new shift-register-based configuration memory of embryonic system to solve the problem by using the inter-cell communication to reduce the gene storage capacity of a single cell. The article designs an overall structure of the shift-register-based configuration memories of the embryonic system and connects them into a chain structure. The article also designs an inner circuit of the cell, the control of shift-register-based configuration memory and the way of runtime dynamic configuration. The simulation of field programmable gate array （FPGA） evidences the realizability of the proposed design. Compared to the SRAM-based one, this memory can save 90% of the area when constructing embryonic systems larger than 128× 128 under the same condition.

关键词： aerospace vehicle embryonic systems configuration control dynamic reconfiguration fault-tolerant

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一种低功耗多功能开关电流型FPAA的设计

仪器仪表学报 2013年第12期34卷 2722-2729页

作者：王友仁任晋华南京航空航天大学自动化学院南京210016

针对现有的开关电流型FPAA功耗大、电路性能不高、功能有限和灵活性不足等问题,设计了一种基于class AB栅极接地开关电流存储电路的FPAA。设计的class AB结构克服了偏置电流必须高于输入信号电流的限制,可以减少阵列的功耗;栅极接地技... 详细信息

针对现有的开关电流型FPAA功耗大、电路性能不高、功能有限和灵活性不足等问题,设计了一种基于class AB栅极接地开关电流存储电路的FPAA。设计的class AB结构克服了偏置电流必须高于输入信号电流的限制,可以减少阵列的功耗;栅极接地技术有利于消除输入-输出跨导比误差,提高阵列性能。设计了具有可编程电流缩放单元的可重构模拟单元,提高了阵列的灵活性,扩展了阵列功能。在3×2规模的FPAA上,重构实现了模拟滤波器和可编程FIR滤波器,仿真实验结果证明了所设计开关电流型FPAA是有效可行的。与传统开关电流型FPAA相比,实现相同功能电路的功耗降低了50%以上。对FPAA中CAB进行了物理验证,成功重构实现一种电流放大器,结果表明放大器增益可调。

关键词：低功耗 class AB栅极接地 FPAA 可编程FIR滤波器

基于可靠性优化的芯片自愈型硬件细胞阵列布局方法

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航空学报 2014年第12期35卷 3392-3402页

作者：张砦王友仁南京航空航天大学自动化学院江苏南京210016

以提高可靠性为目标,研究芯片自愈型硬件细胞阵列布局的新结构和新方法。针对传统可靠性模型无法体现细胞内部模块随布局结构动态变化的不足,通过细胞单元电路资源消耗分析,面向二维阵列结构进行了新的可靠性建模。根据新模型,在分析布... 详细信息

以提高可靠性为目标,研究芯片自愈型硬件细胞阵列布局的新结构和新方法。针对传统可靠性模型无法体现细胞内部模块随布局结构动态变化的不足,通过细胞单元电路资源消耗分析,面向二维阵列结构进行了新的可靠性建模。根据新模型,在分析布局结构参数对可靠性影响程度的基础上,提出了一种先分块再分层的细胞布局新结构。用实例验证了新布局结构对可靠性提高的有效性,给出了不同设计任务和细胞电路设计方法情况下确定最佳布局方式的计算方法,并总结出了新布局结构中分块、分层参数选择规律,最终论证了最佳布局方式计算方法和参数选择规律的一般适用性。

关键词：芯片自愈型硬件可靠性细胞阵列布局结构优化可重构设计准则

应用设计过程的胚胎硬件细胞单元粒度优化方法

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航空学报 2016年第11期37卷 3502-3511页

作者：张砦王友仁南京航空航天大学自动化学院南京210016

胚胎硬件的高可靠性主要由新颖的硬件体系和细胞电路结构来保障,缺乏应用设计过程的可靠性提高方法研究。分析了在应用设计过程中可调的胚胎硬件可靠性影响因素,针对细胞单元粒度不同会导致细胞面积变化从而影响细胞阵列可靠性的实际情... 详细信息

胚胎硬件的高可靠性主要由新颖的硬件体系和细胞电路结构来保障,缺乏应用设计过程的可靠性提高方法研究。分析了在应用设计过程中可调的胚胎硬件可靠性影响因素,针对细胞单元粒度不同会导致细胞面积变化从而影响细胞阵列可靠性的实际情况,对传统可靠性模型无法体现细胞面积变化的不足进行了改进,建立了新的可靠性模型。通过实例分析,总结出不同细胞单元粒度情况下的细胞阵列可靠性变化规律,进而给出细胞单元粒度优化选择方法,设计者基于该方法不需设计完整电路就能确定自身设计能力范围内获得最大可靠性的细胞单元粒度。

关键词：胚胎硬件可靠性分析电路优化细胞单元粒度可重构