Disk Drive Emulator Vibration Validation
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Solution Overview
Problem
Disk drive testing systems face challenges in accurately validating test slots due to vibration issues, which can lead to unreliable results and increased manufacturing costs, as existing methods are cumbersome and expensive, and limited by the sensitivity of modern disk drives to vibrations.
Innovation Solution
A disk drive emulator with a stiff emulator body made of high-tensile modulus material, equipped with vibration sensors and weight receivers, is used to simulate a real disk drive, allowing for precise vibration measurement and validation of test slots without contributing to vibration noise, thereby ensuring accurate testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gold drive is used to validate test slots, then the test slot functionality can be verified, but the validation process becomes cumbersome and expensive
Solution Approach 1:
The patent creates a simplified copy (emulator) of a real disk drive that replicates its mechanical and electrical characteristics. The emulator includes a body with similar mass, center of gravity, and vibration properties, along with interface connectors that match the test slot expectations. This copy enables validation without requiring expensive gold drives, resolving the contradiction between reliable validation and process complexity.
Solution Approach 2:
The emulator allows adjustment of key parameters such as mass, center of gravity position, and vibration characteristics through configurable components like weights and springs. This parameter adjustability enables the same emulator to validate multiple test slot configurations, reducing the need for multiple specialized validation devices and simplifying the overall validation process.
2Productivity
If multiple disk drives are tested simultaneously in batches, then manufacturing efficiency is improved, but vibration cross-talking between drives increases
Solution Approach 1:
The emulator serves as an intermediary device between the test slot and the testing system. When placed in a test slot, it acts as a vibration buffer that absorbs and isolates vibrations, preventing cross-talk to adjacent drives. The emulator's designed mechanical properties allow it to dampen vibrations while maintaining electrical connectivity, enabling batch testing without the harmful vibration propagation that would otherwise occur.
3Quantity of substance
If modern high-capacity disk drives with smaller head clearance are used, then storage capacity and speed are improved, but sensitivity to vibration increases
Solution Approach 1:
The emulator replicates the mass, center of gravity, and vibration characteristics of modern high-capacity disk drives without containing actual sensitive components. By copying only the mechanical properties needed for vibration testing, the emulator enables thorough vibration validation of test slots and fixtures without the risk of damaging actual high-capacity drives with their small head clearances.
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 emulator effectively validates test slots by accurately measuring vibrations and simulating real disk drive conditions, reducing the risk of vibration-related errors and lowering manufacturing costs through efficient and reliable testing.
Implementation Method 1
at least one vibration sensor disposed on the emulator body... monitoring a vibration level of at least one region of the disk drive emulator
Implementation Method 2
The emulator body comprises a material having a tensile modulus of at least 40×10^6 Psi
Data Source
AI summary
A disk drive emulator for testing a test slot of a disk drive testing system includes an emulator body, an interface connecter disposed on the emulator body, and at least one vibration sensor disposed on the emulator body. The emulator body comprises a material having a tensile modulus of at least 40×10^6 Psi.