Detection Technology for Catenary Stagger Value Based on Acceleration Signals
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 3
Abstract
［Objective］ To address the inefficiency and high operational requirements of existing detection methods for catenary stagger value in electrified railways, special research on catenary stagger value detection method is conducted. ［Method］ A detection method combining continuous wavelet transform (CWT) and random forest (RF) is proposed to effectively detect catenary stagger value across different speed levels. CWT is applied to the blowing acceleration signals at both ends of the pantograph contact strip, enabling time-frequency decomposition to reveal the distribution of time-domain signals across various frequency intervals. The power within relevant frequency ranges is calculated, and an indicator correlated with the trend of stagger values is developed based on these power values. The variation of this indicator is analyzed under different conditions in terms of pantograph head mass, pantograph head suspension stiffness, height, and operating speed, revealing that operating speed has a significant impact. Subsequently, the computed indicator and operating speed are used as input features to train, test, and validate an RF model. ［Result & Conclusion］ The proposed method accurately detects catenary stagger values across various operating speeds, achieving a root mean square error as low as 5.84, outperforming other existing algorithms. In brief, the study effectively enhances the measurement efficiency of catenary stagger values, avoiding the limitations imposed by previous methods on operational environmental conditions, and provides a novel approach for catenary stagger value detection.
Authors and Affiliations
Hongming CHEN, Ning ZHOU, Wenwei LU, Zixian YANG, Yao CHENG, Dong WANG, Weihua ZHANG
Keywords
Related Articles
- EP ID EP760164
- DOI 10.16037/j.1007-869x.2025.03.044
- Views 25
- Downloads 0
Analysis and Countermeasures of Bolt Fracture Issues in EMU Passenger Compartment Seat Backs
［Objective］ The fracture of seat back bolts in high-speed railway EMU (electric multiple units) trains results in the back support performance failure and the angle adjustment feature malfunction. A high frequency of b...
Intelligent Management-control Method and Platform Application for Rail Transit EPC Projects
Objective Targeting the technical challenges including difficult implementation of refined management, lagged progress control information, heavy safety supervision tasks, and difficulties in achieving digital handover i...
Rapid Diagnostic Method for ZDJ9 Switch Machine Circuit Faults
Objective The existing diagnostic methods for ZDJ9 switch machine circuit faults have multiple steps, complex operations, and low efficiency, seriously affecting the fault repair efficiency. Thus, it is necessary to deve...
Anti-Fusing Measures for Urban Rail Transit Trains Stopping within the Catenary Insulated Overlap Section
[Objective] The contact wire fusing failures frequently occur when pantographs of urban rail transit trains stop within the insulated overlap section of the catenary system. To prevent such failures and improve the safe...
Optimization Design of Metro Vehicle Air Compressor Frame Structure Based on Adaptive Response Surface Method
Objective A finite element model of metro vehicle air compressor frame is established and verified through modal testing and vibration testing. It is found that the vertical bending modal frequency of the dryer frame coi...