Disk-Drive Suspension Pseudo Feature for Vibration Damping
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Solution Overview
Problem
Current disk-drive suspensions face challenges in operating effectively under extreme conditions, requiring improved performance and reliability with high storage capacity and low-latency access times.
Innovation Solution
A pseudo feature for disk-drive suspensions is introduced, comprising a first constraining layer, a damper layer, and a second constraining layer, which is configured to enhance stiffness, minimize vibration, and reduce the number of piezoelectric motors, thereby improving operational characteristics and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional disk-drive suspension designs are used, then the structure is simple, but the suspension cannot effectively operate under extreme conditions with high storage capacity and low-latency access times
Solution Approach 1:
The suspension structure is divided into multiple functional layers including a baseplate, loadbeam, and multiple pseudo-features with different material properties. Each layer performs a specific function: the constraining layers provide structural support while the viscoelastic damper layer provides vibration damping, allowing the system to meet extreme operating conditions without excessive overall complexity
Solution Approach 2:
The patent employs composite material construction by combining a viscoelastic damper layer between two constraining layers. This composite structure integrates the damping properties of viscoelastic materials with the structural integrity of constraining layers, enabling reliable operation under extreme conditions while maintaining a manageable structural complexity
2Reliability
If more piezoelectric motors are added to improve suspension performance, then the operational characteristics improve, but the cost increases
Solution Approach 1:
The patent extracts the vibration damping function from the piezoelectric motor system and implements it through dedicated pseudo-features with viscoelastic damper layers. This separates the damping function from the actuation function, allowing the suspension to achieve better operational characteristics without requiring additional piezoelectric motors, thereby reducing manufacturing cost
Solution Approach 2:
The pseudo-features serve multiple functions: they provide structural support, vibration damping, and stiffness tuning simultaneously. By making these components multi-functional, the patent reduces the need for additional specialized components like extra piezoelectric motors, thus improving operational characteristics while controlling manufacturing costs
3Strength
If the suspension stiffness is increased to improve performance, then the operational characteristics improve, but the vibration is amplified
Solution Approach 1:
The patent applies local quality by creating regions of different stiffness and damping properties within the suspension structure. The constraining layers provide localized stiffness where needed for structural integrity, while the viscoelastic damper layer provides localized vibration damping in regions where vibration control is critical, thus achieving both high stiffness and vibration reduction
4Object-generated harmful factors
If a multi-layer pseudo feature structure is implemented, then the vibration damping improves, but the manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated pseudo-feature component. The multi-layer structure combining constraining layers and viscoelastic damper layer is manufactured as one integrated unit rather than separate components, which simplifies the assembly process and reduces manufacturing complexity despite the improved vibration damping capabilities
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 pseudo feature effectively tunes the suspension for better operation, reduces vibration, and decreases the number of piezoelectric motors, enhancing reliability and lowering costs while maintaining performance.
Implementation Method 1
a damper layer (404) arranged between the first constraining layer (402) and the second constraining layer (406)
Data Source
AI summary
A pseudo feature for a suspension and method of manufacture are described. The pseudo feature for a suspension includes a first constraining layer; a second constraining layer; and a damping layer arranged between the first constraining layer and the second constraining layer.