Electromagnetic-Piezoelectric Vibration Control via Self-Adaptive Damping
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Solution Overview
Problem
Existing vibration control technologies, particularly semi-active control methods like SSDV, require an external voltage source and large inductance elements, leading to complex and heavy circuit systems that are difficult to apply in practice.
Innovation Solution
An electromagnetic-piezoelectric composite vibration control device using synchronized switch damping technology, which includes a load platform, piezoelectric cantilever beams, an electromagnetic mechanism, and a simplified circuit system that generates a self-adaptive voltage source through electromagnetic induction, eliminating the need for an external voltage source and reducing circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SSDV technology is used to achieve complete vibration abatement, then vibration control effect is improved, but device complexity and weight increase due to external voltage source and large inductance elements
Solution Approach 1:
The patent combines the electromagnetic mechanism and piezoelectric cantilever beams into a single integrated vibration control device. The electromagnetic mechanism generates voltage through electromagnetic induction during vibration, which directly drives the piezoelectric elements to produce damping force, eliminating the need for separate external voltage sources and complex circuit systems while achieving effective vibration control
Solution Approach 2:
The electromagnetic mechanism serves as a self-powered voltage source by utilizing the vibration energy of the system itself to generate the required voltage through electromagnetic induction. This self-service approach eliminates dependency on external power supplies and complex circuit regulation, reducing device complexity while maintaining effective vibration damping
2Reliability
If SSDV technology is used to achieve complete vibration abatement, then vibration control effect is improved, but device weight increases due to external voltage source and large inductance elements
Solution Approach 1:
The patent combines the electromagnetic mechanism and piezoelectric cantilever beams into a single integrated vibration control device. The electromagnetic mechanism generates voltage through electromagnetic induction during vibration, which directly drives the piezoelectric elements to produce damping force, eliminating the need for separate external voltage sources and complex circuit systems while achieving effective vibration control
Solution Approach 2:
The electromagnetic mechanism serves as a self-powered voltage source by utilizing the vibration energy of the system itself to generate the required voltage through electromagnetic induction. This self-service approach eliminates dependency on external power supplies and complex circuit regulation, reducing device complexity while maintaining effective vibration damping
3Device complexity
If passive control is used with piezoelectric materials, then system simplicity is improved, but control effect deteriorates due to energy dissipation through external circuits
Solution Approach 1:
The patent combines the electromagnetic mechanism and piezoelectric cantilever beams into a single integrated vibration control device. The electromagnetic mechanism generates voltage through electromagnetic induction during vibration, which directly drives the piezoelectric elements to produce damping force, eliminating the need for separate external voltage sources and complex circuit systems while achieving effective vibration control
Solution Approach 2:
The patent replaces the traditional passive electrical circuit energy dissipation method with a direct electromechanical coupling approach. The electromagnetic mechanism converts vibration energy directly into electrical energy that immediately actuates the piezoelectric elements to produce mechanical damping force, eliminating the need for external circuit energy dissipation and significantly improving control effectiveness
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
The device achieves effective vibration damping with enhanced reliability and simplicity, as the electromagnetic mechanism stores induced electricity, providing a proportional voltage source that adapts to system vibrations, and the piezoelectric cantilever beams ensure a robust damping effect even if the circuit system fails.
Implementation Method 1
the electromagnetic mechanism is used for storing electricity generated by electromagnetic induction into the circuit system to serve as a voltage source
Implementation Method 2
the application of piezoelectric materials in vibration control mainly includes three conditions such as passive control, active control and semi-active control
Data Source
AI summary
An electromagnetic-piezoelectric composite vibration control device based on a synchronized switch damping technology is provided. An upper guiding component is installed inside the upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper idler wheel mechanism and a lower idler wheel mechanism are fixedly sleeved on the guide rod and are positioned between the upper guiding component and the lower guiding component respectively, an electromagnetic mechanism is fixedly sleeved outside the guide rod, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, and the piezoelectric cantilever beams and the electromagnetic mechanism are connected with a circuit system respectively.