Vehicle Noise Analysis via Dynamic Parameter Conversion
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Solution Overview
Problem
Conventional electromagnetic noise analysis methods for power electronic apparatuses in vehicles and railroad vehicles fail to accurately predict noise levels during continuous changes in operating conditions, leading to potential equipment malfunctions.
Innovation Solution
An electromagnetic noise analyzing apparatus and controlling method that considers the continuous changes in vehicle operating states by converting driving parameters into noise parameters, analyzing electromagnetic noise, and adjusting operation to reduce noise levels through a vehicle running control section, signal converting section, and electromagnetic noise analyzing section.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If SiC power devices are used to improve efficiency and reduce size, then power efficiency is improved and device size is reduced, but electromagnetic noise increases leading to higher probability of equipment malfunction
Solution Approach 1:
The patent applies dynamics by transitioning from static, constant operation mode analysis to dynamic, continuous running state analysis. The system continuously monitors and analyzes electromagnetic noise during actual vehicle operation where running states change continuously, rather than assuming fixed operating conditions. This enables the system to adapt to varying noise levels as the vehicle operates under different conditions.
Solution Approach 2:
The patent implements feedback by analyzing electromagnetic noise during actual operation and using this analysis to control apparatus operation. The system creates a closed-loop control mechanism where noise analysis results feed back into operational decisions, allowing the system to adjust and optimize performance while maintaining acceptable noise levels.
2Ease of operation
If conventional noise analysis methods are used with predetermined operation modes, then analysis simplicity is maintained, but accuracy of noise prediction during actual running deteriorates
Solution Approach 1:
The patent transforms the static analysis approach into a dynamic one by continuously analyzing electromagnetic noise during actual vehicle operation. Instead of relying on predetermined operation modes, the system adapts to continuous changes in running states, significantly improving noise prediction accuracy while maintaining practical operability through automated analysis.
Solution Approach 2:
The system performs self-analysis by automatically monitoring and analyzing electromagnetic noise during its own operation. The vehicle's control apparatus analyzes its own electromagnetic emissions in real-time, eliminating the need for separate, complex external measurement systems and achieving high accuracy without proportionally increasing operational complexity.
3Measurement precision
If electromagnetic noise analysis is performed during continuous running state changes, then noise prediction accuracy is improved, but system complexity increases
Solution Approach 1:
The control apparatus performs multiple functions: it controls vehicle operation, analyzes electromagnetic noise, and uses the analysis results to optimize performance. By integrating noise analysis functionality into the existing control apparatus, the system achieves high measurement precision without adding separate, complex dedicated measurement systems.
Solution Approach 2:
The system analyzes its own electromagnetic emissions using its own control apparatus, eliminating the need for external measurement equipment. This self-service approach reduces overall system complexity while maintaining high analysis accuracy, as the control apparatus already possesses the computational and sensing capabilities needed for noise analysis.
Data Source
AI summary
Provided is an electromagnetic noise analyzing apparatus, a controlling apparatus, and a controlling method in each of which the continuous change of the running state of a vehicle or a railway vehicle is considered. The controlling apparatus includes: a vehicle running control section which outputs, on the basis of operation information of a vehicle, a vehicle driving parameter as a driving state of the vehicle; a signal converting section which converts the vehicle driving parameter into a noise parameter as an electric parameter; and an electromagnetic noise analyzing section which calculates, on the basis of the noise parameter, the amount of electromagnetic noise propagating in the vehicle.