Oklahoma State University

Prabhakar Pagilla

Ryan Todd Ratliff

Aravind Seshadri

Md M Haque

Ken Hopcus

A method of adaptive guiding of a web on a roller is disclosed. The method includes computing an output of a reference model, reading an output of a sensor that indicates a web position, determining a difference between the output of the reference model and the output of the sensor, and updating a set off controller parameters for the roller based on the difference.

Method for adaptive guiding of webs

A web edge sensor is disclosed. The web edge sensor has a light source directing light incident to an edge of a web. The edge of the web scatters the light and a sensor array that detects a first portion of the light scattered from the edge of the web and rejects a second portion to determine a position of the web edge.

Fiber optic web edge sensor

An apparatus and method for loading and offloading a read/write head from a load ramp onto a disc are disclosed. The apparatus includes at least a basedeck supporting a spindle motor with an attached disc and an actuator assembly with a read/write head configured for communication with the disc, and a load ramp positioned adjacent the disc and configured for receipt of the read/write head. The actuator assembly includes at least an actuator motor magnet mounted to said basedeck, an actuator body attached to the basedeck and providing a voice coil configured for interaction with the actuator motor magnet, and a bias feature secured to said actuator body and configured for communication with the motor magnet such that when the read/write head is parked on the load ramp, the bias feature mitigates an unintentional engagement of the read/write head with the disc.

Commutational ramp loading apparatus and method

According to a preferred aspect of the instant invention, there is provided a system and method of moving a disc drive arm in the presence of nonlinear magnetic bias. Further, in another preferred embodiment the instant method will be adaptive and/or self-corrective and is especially useful when used with disc drive hardware other than the hardware that was used to model the control law.

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Stillwater, OK, United States of America

Prabhakar Pagilla