Segmented Tape Head with Independent Skew Compensation
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Solution Overview
Problem
Tape deformation due to factors like changes in tension, temperature, and humidity causes misregistration between transducers of the tape head and data tracks, leading to read errors in magnetic tape storage systems.
Innovation Solution
A segmented tape head module with pivotally coupled beam substrate segments and a controllable actuator to adjust skew angles, allowing independent control of skew angles for each segment to align transducers with data tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single rigid tape head is used, then the structure is simple and manufacturing is easier, but it cannot compensate for nonlinear tape deformations causing misregistration
Solution Approach 1:
The tape head is divided into multiple independently controllable segments that can pivot relative to each other. Each segment can be adjusted to have a different skew angle, allowing the head to accommodate nonlinear tape deformations across different regions of the tape width.
Solution Approach 2:
The tape head transitions from a static rigid structure to a dynamic segmented structure with movable joints. actuators enable real-time adjustment of segment positions and skew angles to compensate for tape deformation during operation.
2Reliability
If tension is increased to reduce tape deformation, then track registration improves, but tape breakage risk increases
Solution Approach 1:
Instead of changing tape tension to maintain registration, the invention changes the geometric parameters of the tape head itself by adjusting segment skew angles. This allows registration compensation without subjecting the tape to harmful tension changes.
3Measurement precision
If a single skew angle is applied to the entire tape head, then the control mechanism is simpler, but it cannot accurately compensate for varying deformations across different tape regions
Solution Approach 1:
Different segments of the tape head are assigned different skew angles tailored to the specific deformation characteristics of their corresponding tape regions. This local customization of skew angles improves compensation accuracy for varying deformations across the tape width.
Solution Approach 2:
The tape head is divided into multiple independently controllable segments that can pivot relative to each other. Each segment can be adjusted to have a different skew angle, allowing the head to accommodate nonlinear tape deformations across different regions of the tape width.
Data Source
AI summary
Provided are a computer program product, device, system, and method for compensating for a nonlinear deformation field of a tape of a tape storage system. In one embodiment, a head beam of a tape head module of a tape drive employing active skew-based TDS compensation, is segmented into linear segments which are pivotally coupled to each other. Each linear beam segment carries a portion of the transducer array of the tape head module to form a tape head module segment. The pivot angle between a pair of pivotally coupled head module segments of the tape head may be controlled by a controllable pivot actuator to provide an independently adjustable skew angle for each module segment with respect to the direction of travel of tape. As a result, it is believed that registration between the transducers of each module segment and data tracks of the tape may be improved.