Piezoelectric Vibration Isolation Platform for Multi-DOF Fast Response
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Solution Overview
Problem
Traditional active vibration isolation platforms are heavy, complex, and slow, limiting their application in multi-degree-of-freedom and multi-modal vibration scenarios, necessitating a lightweight, compact, and fast-response solution.
Innovation Solution
A multi-modal and multi-degree-of-freedom piezoelectric active vibration isolation platform utilizing passive and active vibration isolation units, combined with piezoelectric ceramic plates for actuation, to achieve wide-frequency-band vibration isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional active vibration isolation platforms are used, then vibration isolation capability is provided, but the platform becomes heavy and complex
Solution Approach 1:
The patent replaces traditional mechanical vibration isolation components (springs, dampers, actuators) with piezoelectric materials that directly convert electrical energy to mechanical deformation. The piezoelectric ceramic plates are embedded within the vibration isolation platform structure, eliminating the need for separate heavy mechanical actuation systems while providing fast response and high precision vibration control.
Solution Approach 2:
The patent employs composite material structures combining piezoelectric ceramics with structural materials. The piezoelectric ceramic plates are integrated into the platform body, creating a composite structure that provides both structural support and active vibration isolation functionality, reducing overall weight compared to traditional separate-component systems.
2Reliability
If traditional active vibration isolation platforms are used, then vibration isolation is provided, but the structure becomes complex
Solution Approach 1:
The patent merges the structural components with vibration isolation functionality. The piezoelectric ceramic plates are embedded within the platform structure itself, combining the load-bearing structure and the active vibration isolation actuator into a single integrated component, thereby simplifying the overall system architecture.
Solution Approach 2:
The piezoelectric ceramic plates serve multiple functions simultaneously: they provide structural support as part of the platform body, act as sensors for detecting vibrations through the piezoelectric effect, and function as actuators for generating corrective vibrations. This multi-functionality reduces the number of separate components needed.
3Reliability
If traditional active vibration isolation platforms are used, then vibration isolation is provided, but the response speed becomes slow
Solution Approach 1:
The patent replaces slow-responding mechanical actuators with piezoelectric materials that exhibit extremely fast response characteristics. The piezoelectric effect occurs instantaneously when voltage is applied, enabling the platform to detect and counteract vibrations in real-time with microsecond-level response times, far exceeding traditional mechanical systems.
4Speed
If piezoelectric ceramic plates are used for actuation, then fast response and light weight are achieved, but the platform must handle polarization and wiring complexity
Solution Approach 1:
The patent applies different polarization directions to different sets of piezoelectric ceramic plates based on their local functional requirements. Some plates are polarized for vertical vibration control, others for horizontal control, with wiring arranged to match the specific vibration isolation needs of each location within the platform structure.
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 platform provides compact structure, rapid response, and effective vibration isolation across multiple modalities and degrees of freedom, resisting electromagnetic interference.
Implementation Method 1
through the inverse piezoelectric effect of the driving component, the active vibration isolation unit is actuated, and generates elongation or contraction deformation in an axial direction
Implementation Method 2
the first acceleration sensor is arranged on an end face of the upper connector, connected in series with the upper connector and the upper platform, and configured to sense a vibration signal of the upper platform
Implementation Method 3
the second acceleration sensor is arranged in an inner hole of the fixed beam, and configured to sense a vibration signal of the fixed beam
Implementation Method 4
the passive vibration isolation unit includes the Hooke hinge, which can generate bending deformation in any radial direction, and play a passive vibration isolation effect in high frequency disturbance. Relying on the structure of the Hooke hinge, the passive vibration isolation unit has the characteristic of reducing stiffness
Data Source
AI summary
Disclosed is a multi-modal and multi-degree-of-freedom piezoelectric active vibration isolation platform and a working method therefor. The piezoelectric active vibration isolation platform includes an upper platform, a lower platform, a control module, and four vibration isolation modules, where the vibration isolation module includes a passive vibration isolation unit and an active vibration isolation unit; the passive vibration isolation unit includes an upper connector, a lower connector, a cross Hooke hinge, and a first acceleration sensor; the active vibration isolation unit includes a fixed beam, a pre-tightening bolt, a second acceleration sensor, and a driving component; the platform can provide active vibration isolation for the longitudinal (axial) vibration and the bending vibration in any radial direction of a vibration isolation object, and has the advantages of fast response, resistance to electromagnetic interference, and light weight.