Driveshaft Harmonic Vibration Detection With Suspension Height Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vibrations in automotive vehicles, particularly caused by the driveline, can lead to discomfort for occupants and accelerated component wear, potentially resulting in early failure.
Innovation Solution
A system comprising sensors and a controller that convert vibration and angular velocity signals into frequency domains for comparison, diagnosing driveline vibrations, and adjusting the vertical height between the chassis and drive axle to mitigate these vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vibration detection and analysis system is implemented, then early detection of driveline vibrations is achieved, but device complexity increases
Solution Approach 1:
The controller performs multiple functions: it processes vibration signals from sensors, converts them to frequency domain, compares with driveshaft speed signals, diagnoses vibration causes, and controls air bellows suspension. This multi-functionality reduces the need for separate dedicated systems while achieving early vibration detection.
Solution Approach 2:
The system combines vibration sensing, frequency analysis, speed monitoring, and suspension control into an integrated architecture. The controller merges signal processing, diagnostic logic, and actuation control into a single coordinated system, reducing overall system complexity while maintaining detection capability.
2Measurement precision
If frequency domain conversion and comparison is performed, then vibration diagnosis precision is improved, but use of energy increases
Solution Approach 1:
The system performs frequency domain conversion and comparison only when vibration signals are detected above certain thresholds, rather than continuously processing all signals. This partial action approach maintains diagnostic precision for actual vibration events while reducing unnecessary energy consumption during normal operation.
3Object-affected harmful factors
If vertical height adjustment is implemented, then vibration mitigation is improved, but device complexity increases
Solution Approach 1:
The air bellows suspension system automatically adjusts vertical height based on controller commands without requiring manual intervention. The system monitors vibration levels and autonomously modifies suspension characteristics to mitigate harmful vibrations, making the complexity management self-contained.
Solution Approach 2:
The system mitigates vibrations by changing the vertical height parameter between chassis and drive axle through air bellows adjustment. This parameter change modifies the driveline geometry and vibration characteristics, providing a simple yet effective control mechanism without complex mechanical modifications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Early detection and mitigation of driveline vibrations reduce discomfort and extend component lifespan by addressing the root cause of vibrations.
Implementation Method 1
convert, in the frequency domain, both the one or more first signals and second signals received into respective first and second frequency values
Implementation Method 2
a suspension system which includes at least one suspension air bellows
Implementation Method 3
at least one suspension air bellows
Data Source
AI summary
System for detecting vibrations in an automotive vehicle, comprising, suitable to be mounted on board of the automotive vehicle: a controller, at least one sensor which transmits to the controller first signals indicative of vibrations possibly present onboard the automotive vehicle, and at least one speed sensor which transmits to the controller second signals indicative of values of the angular velocity of the rotating driveshaft of the automotive vehicle. The controller is configured to: convert in the frequency domain the first and second signals received into respective first and second frequency values, compare the first frequency values representing the converted possible vibrations onboard the automotive vehicle with the second frequency values representing the converted angular velocity values of the rotating driveshaft, and diagnose the presence of detected vibrations caused by the driveshaft when the first frequency value(s) is a harmonic of a corresponding one frequency of the second frequency values.