Test Bench Vibration Control via Adjustable Resonance Elements
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Solution Overview
Problem
Current test bench arrangements struggle to accurately simulate real-world vibration conditions, leading to unrealistic test results and potential unexpected errors or malfunctions in vehicle components, necessitating improved correlation between engine components in real vehicles and test benches.
Innovation Solution
A control device adjusts vibration-relevant properties of an element between the test bench and test object to match predetermined vibration courses, allowing for adaptive changes in resonance frequencies and simulation of specific vibration states, using adjustable elements like metal mesh or electro-rheological fluids to influence vibrations and avoid resonance issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fixed vibration properties are used in test bench arrangements, then the structure is simple and stable, but the ability to simulate real-world vibration conditions is insufficient
Solution Approach 1:
The patent applies the dynamics principle by making the vibration properties of support structure elements adjustable during operation. Elements such as bearings or mounting structures can change their stiffness or damping characteristics dynamically to match real-world vibration conditions, transforming a static test bench into an adaptive system that simulates varying operational environments.
Solution Approach 2:
The patent implements parameter changes by modifying vibration-relevant properties (such as stiffness, damping, or resonance frequency) of support structure elements during testing. This allows the test bench to adapt its mechanical characteristics to match different real-world operating conditions, enabling more realistic vibration simulation without requiring multiple fixed-configuration test benches.
2Reliability
If resonance frequencies are not adjusted, then the test bench operation is simple, but unexpected errors and malfunctions occur due to resonance issues
Solution Approach 1:
The patent applies feedback by using sensors to detect actual vibration conditions and resonance phenomena, then feeding this information back to a control device that adjusts the vibration properties of support elements. This closed-loop control system automatically detects resonance issues and modifies system parameters to avoid malfunction, ensuring reliable testing under varying conditions.
Solution Approach 2:
The patent implements preliminary action by pre-programming or pre-configuring the control device with target vibration profiles and resonance avoidance parameters. Before actual testing begins, the system can pre-adjust support element properties to optimal values, preventing resonance issues before they occur rather than reacting to them during testing.
3Measurement precision
If real-world vibration conditions are not accurately simulated, then the test bench design is simple, but test results do not correlate with real vehicle performance
Solution Approach 1:
The patent applies copying by using sensors and control systems to replicate real-world vibration profiles and operating conditions on the test bench. Instead of physically transporting vehicles to test locations, the system creates accurate copies of real-world vibration environments through controlled excitation and adaptive support structures, enabling realistic component testing in a laboratory setting.
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
This solution enables precise simulation of real driving conditions on a test bench, shifting resonance frequencies out of critical ranges and ensuring optimal vibration states, thereby enhancing the design and durability of vehicle components by providing more realistic and reliable test results.
Implementation Method 1
the vibrations between at least one pair of elements of the test bench arrangement and/or of the test object that can oscillate relative to one another can be influenced
Implementation Method 2
to permanently shift resonance frequencies into a non-critical range
Implementation Method 3
a damper whose damping constant can be influenced by using an electrorheological fluid in order to avoid resonance
Data Source
Figure 1~2b
Figure 3a~4
AI summary
A test bench arrangement for at least one specimen (1) comprising at least one actuator for acting on the specimen, at least one sensor for recording measurement values, and a support structure (2) for the specimen. In order to improve the correlation between the ratios of engines, components or the like when using, for example, in a real vehicle and alternatively in a test bench arrangement, at least one element (4), which can be set by a control device in at least one vibration-relevant characteristic, is interconnected between at least one pair of elements of the test bench arrangement which can resonate against each other and/or the specimen (1).