Actuator Loop Fault Diagnosis Based on Chaotic Differential Evolution FCM Algorithm 基于混沌差分进化FCM算法的舵回路故障诊断
Therefore complete and exact analysis of every loop current of electric machine is needed when the internal fault takes place. 本文应用交流电机的多回路理论,建立了凸极同步电机定子绕组内部故障时的数学模型。
Large number of loop operation, especially the electromagnetic loop operation, has made the fault current excess the switch capacity. 由于大量的环网运行方式,尤其是电磁环网运行方式,造成电网短路电流超出开关设备容量。
Wave analysis of main loop of synchronous generator SCR exciting system in fault state; 发电机励磁系统对电力系统的电压控制和稳定控制具有重要作用。
Be the adoption of redundancy optimization, self-designed adjustable installation structure of loop coder, redundancy switching and fault warning functions of the loop coder were developed. 采用冗余优化,自行设计实施活套编码器可调式的安装结构,开发出活套编码器的冗余切换和故障报警功能。
It is shown that, when the power flow passing the power loop is strong, the tripping of line without fault causes more severe disturbance in power system than that of a SLG fault on the same UHV line. 研究表明,在电磁环网潮流较强的情况下,单回高一级电压线路电磁环网的无故障跳线比单永故障严重。
According to the influence of loop net on DC system fault detection, a new method based on wavelet entropy theory to detect grounding fault in loop net of DC power system is proposed in view of traditional low frequency signal injection method. 针对直流系统中环网对接地故障检测的影响,在传统低频信号注入法的基础上提出了一种新的基于小波熵理论的直流系统环网接地故障检测方法。
The power system typical radiant net fault chains and loop net fault chains are quantitatively analyzed. 定量分析了电力系统典型对称辐射网、不同负荷分布的环网结构的系统失效事故链;
Based on the principle of the actuator loop, a system is established to simulate and diagnose the fault. 根据舵回路的工作原理,建立实物系统进行故障模拟和诊断。
The characteristic of synchronous generator SCR excitation system for single close loop control is analysed and it's fault is pointed out in this paper. 本文分析了单闭环控制的同步发电机励磁系统的特点,指出了其存在的问题。
The resulting closed-loop nonlinear systems are stable after fault accommodation. 故障调节后闭环系统是稳定的。
Closed Loop Testing And Fault Diagnosis Of Brainpower Circuit Board 智能电路板的闭环测试与故障诊断
Based on performance of real-time and closed loop feedback flight control system, a set of robust adaptive observers are set up for sensor fault isolation and reconfiguration. 考虑到飞行控制系统闭环反馈及实时的特性,设计了多个鲁棒自适应观测器用于传感器的故障隔离与重构。
Based on the Fault Tree Analysis ( FTA), the main loop circuit of electrical life-test device is studied and its corresponding fault tree constructed. 在故障树分析理论的基础上,对电寿命试验设备的主回路进行了分析,并建立相应的故障树。
Loop net grounding fault diagnosis of DC system based on wavelet entropy 基于小波熵的直流系统环网接地故障诊断
In the process of constructing fault tree, this method also presents how components failure model is constructed, how child fault trees are connected, how control loop template is formed as well as the flow chart of the fault tree synthesis. 该方法给出了元件故障模式的建立、子故障树间的关联方法、控制回路模板的建立方法,以及故障树自动生成算法的流程图。
The Application of Encoder in Closed Loop Controlling Sstem in Ship Loader and Its Fault Analysis 编码器在装船机闭环控制系统中的应用及故障分析
This essay analyzes the impairment of insulation laminate for fault cable and introduces loop detect-ing skills with high environmental adaptability in view of high concealment and high-resistance fault by prac-tical experiences. 本文对故障电缆绝缘层的损伤进行了分析,根据实践经验,针对隐蔽性较强的高阻故障,提出了环境适应性较强的回线法探测技巧。
After a general introduction of the software/ hardware structure functions of the systems, the discussions are emphasized on the special considerations for closed loop operation and FTU with differential protection function at fault state. 在对配电网自动化系统的软硬件结构和功能进行全面介绍和分析的基础上,着重对闭环运行需特殊考虑的问题以及具有故障状态差动保护功能的FTU进行了论述。
Within the method, based on the analysis of the stability of every interior loop of a fault system, an algorithm of linear state feedback fault tolerant control is obtained by compensating for stability of the unstable interior loops. 它是在容错控制器的设计过程中,在故障系统的各内环稳定性分析的基础上,对失稳的内环进行稳定性补偿所得到的线性状态反馈容错控制策略。
Study on Dislocation Loop and Stack Fault in Plasma-nitrided Layer by Rare-earth Catalytic Penetration 离子渗氮层中γ′-Fe4N相内位错环和层错类型的研究
Simultaneously, the SAN based on Fiber Channel-Arbitrated Loop ( FC-AL) has convenience, expansibility, high fault tolerated ability, high reliability and agility of configuration. It can reduce total holding cost effectively. 并且它通过引入了光纤通道仲裁环技术(FC-AL),使其具有方便性、可扩展性、高容错能力、高可靠性和配置的灵活性,有效减少了总体拥有成本(TCO)。
By injecting low frequency signal and gathering state of loop net, wavelet entropy is calculated as system characteristic parameter and then the fault branch can be found. 通过低频信号注入,采集环网状态,计算小波熵作为系统的特征参数,以小波熵来识别不同情况的接地故障。
Step Plus Test Method's Investigation of Subscriber Loop Twisted-pair Cable Fault 用户环路双绞线电缆故障的阶跃测试方法研究
Reliability Analysis of Double Loop LAN with Double Fault Tolerant Technique 双环双容错功能局域网的可靠性分析
First, combination of hardware in the loop test technology, a fault simulation system of ABS has been established through simulating the sensor failures and actuator failures to provide evaluation environment for evaluating the capability of fault diagnosis and fault handling. 一是结合硬件在回路的测试技术,建立了ABS故障模拟系统。通过模拟可能出现的传感器故障和执行机构故障,为ABS故障诊断方法和故障处理方法提供评测环境。
The research results enable enterprises to quickly evaluate the control loop performance, locate the fault causes, guide the repair and maintenance activities, optimize performance of the plant. 论文研究成果使企业够从系统的角度迅速评价装置控制回路性能、定位故障原因、从而指导装置的检修维护、优化系统性能。
The concept of fault confirmation loop is introduced, which can be used to form the treatment measures of fault tolerance with the operation information of distance protection. 提出了故障确认环的概念,利用故障确认环与距离动作信息构成了容错性处理措施,并给出了广域保护的跳闸流程。
A reaching motion controller, which can be seen as a fault tolerant controller and can retain the stability of the closed loop system in the present of uncertainties, disturbances and actuator fault, is designed. 基于这个滑动平面,设计了一种可以作为容错控制的到达控制。该控制可使得带有模型不确定性、扰动输入和执行器故障的闭环系统保持二次稳定,具有容错功能。
When an encoder fault, using the model predicted value to replace the fault encoder output as feedback to controller, in order to realize the soft loop fault tolerant control. 当编码器发生故障时,通过设计的容错切换机制,用模型预测输出替换故障编码器的输出信号反馈至控制器,从而以软闭环的方式实现对编码器故障的容错控制。