Measuring and testing – Frictional resistance – coefficient or characteristics
Patent
1990-06-25
1992-05-26
Psitos, Aristotelis
Measuring and testing
Frictional resistance, coefficient or characteristics
360137, G01N 1902
Patent
active
051156644
ABSTRACT:
A system for measuring transient friction of a head-disk interface in a magnetic disk storage device employs a servo system for accurate measurements. A first movable member carries a slider simulating a magnetic head which rests on a disk when said disk is at rest. The movable member is movably mounted to a second fixed member. A frictionless detector detects a displacement of the movable member relative to a position of the fixed member produced by a force due to friction when the disk spins. A servo system maintains a fixed distance between first and second members in response to an output from the detector and moves the movable member in response thereto. The output is taken from the servo system and provides a signal proportional a force due to friction exerted on said movable member.
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patent: 4720676 (1988-01-01), Anderson et al.
patent: 4731579 (1988-03-01), Petersen et al.
Hatamura et al., A Measurement of Sliding Resistance Forces for Various Heads & Disks by High-Rigid Force Sensor, IEEE Trans. on Magnetics, vol. 24, No. 6, Nov. 1988 (pp. 2638-2640.
Hamaguchi et al., Measurement of Impulse Forces Arising from Flying Head/Disk Collision in Magnetic Disk Storage Systems, Proceedings of the International Conference on Advanced Mechatronics, May 21-24, 1989, pp. 257-261.
Hegde Suryanarayan G.
Praino Anthony P.
Root Steven J.
Sri-Jayantha Muthuthamby
IBM Corporation
Psitos Aristotelis
Robertson David L.
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