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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

22
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
22
Root-Locus Method01:19

Root-Locus Method

110
A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
This system can be represented by a block...
110
Plotting and Calibrating the Root Locus01:19

Plotting and Calibrating the Root Locus

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Root loci often diverge as system poles shift from the real axis to the complex plane. Key points in this transition are the breakaway and break-in points, indicating where the root locus leaves and reenters the real axis. The branches of the root locus form an angle of 180/n degrees with the real axis, where n is the number of branches at a breakaway or break-in point.
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
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Adjusting a Traverse01:12

Adjusting a Traverse

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In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...
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Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

40
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
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Multimachine Stability01:25

Multimachine Stability

100
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
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Updated: May 7, 2025

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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基于自适应性错误定位数组算法的自动列车运行故障定位.

Yanpeng Zhang1, Yuxiang Cao2

  • 1School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China. zhangyanpeng@lzjtu.edu.cn.

Scientific reports
|January 3, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的故障定位方法,用于高速铁路信号系统. 它有效地识别了自动列车操作 (ATO) 系统中的最小故障图 (MFS),减少了测试案例并提高了准确性.

关键词:
适应性错误定位数组数组适应性粒子小群优化优化自动列车运行自动列车运行组合测试试验 组合测试试验错误局部化 错误局部化 错误局部化掩盖效应是一种掩盖效应.

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科学领域:

  • 铁路运输工程 铁路运输工程
  • 软件测试和验证软件测试和验证
  • 在安全关键系统中的人工智能.

背景情况:

  • 组合测试对于高速铁路信号提供至关重要,但面临着测试案例爆炸和故障掩盖等挑战.
  • 准确的故障定位对于确保复杂系统的可靠性和安全性至关重要,例如自动列车操作 (ATO).

研究的目的:

  • 为高速铁路ATO系统提出一个高效准确的故障定位方法.
  • 在组合测试中解决试验案例爆炸和故障掩盖的问题.
  • 为了有效地识别最小故障方案 (MFS).

主要方法:

  • 为ATO设计一个适应性故障定位模型和测试参数表.
  • 使用部分可变强度覆盖阵列 (PVICA) 算法生成初始测试案例.
  • 通过使用自适应粒子集群优化 (APSO) 算法来识别MFS,优先生成额外的测试案例.

主要成果:

  • 拟议的方法在北京-沈阳高速铁路模拟平台上实现了高完整性 (100%),平均准确性 (91.07%) 和平均C-评估 (84.56%).
  • 与主流自适应算法相比,对多个故障掩盖效应的敏感性有所降低.
  • 需要比比较方法更少的试验案例.

结论:

  • 开发的故障定位方法准确有效地识别了高速铁路ATO系统中的最小故障方案 (MFS).
  • 这种方法有效地减轻了测试案例爆炸和故障掩盖问题.
  • 为验证ATO完整性和加强铁路运输安全提供了有价值的指导.