Diverse Signal Inputs Patents (Class 242/334.2)
  • Patent number: 10347282
    Abstract: Embodiments of the present invention provide a tape transport control system with enhanced regulation of tape tension and velocity over the entire length of the tape. The tape transport control system comprises of circuitry adapted to output and circuitry adapted to receive one or more signals representing a tape velocity, at least one radius of either the first tape reel or the second tape reel, and a tape tension, and based on the received signals, generate at least one control signal to control at least one of the first reel motor or the second reel motor so as to reduce a tension disturbance at a minimum, one frequency corresponding to a time-varying reel-rotation frequency, based on controller parameters that depend on the tape velocity and on the at least one radius of either the first tape reel or the second tape reel.
    Type: Grant
    Filed: June 23, 2017
    Date of Patent: July 9, 2019
    Assignee: International Business Machines Corporation
    Inventors: Angeliki Pantazi, Giovanni Cherubini, Tomoko Taketomi, Nhan X. Bui, Mark A. Lantz
  • Patent number: 10241490
    Abstract: Improvement of following performance about a target value is achieved in a control system, particularly a feedback control system. A command value correcting device corrects a current-control-cycle command value received with a feedback controller using a current-control-cycle controlled variable of a control target.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: March 26, 2019
    Assignee: OMRON Corporation
    Inventors: Masaki Namie, Mikiko Manabe, Takashi Fujii
  • Patent number: 8786219
    Abstract: A motor control device includes: a feedforward computing section for computing a motion reference value and a feedforward driving force based on a motion command; a deviation compensation computing section for outputting a deviation compensation driving force by a control computation for reducing a control deviation; a driving-force command synthesizing section for outputting a driving-force command based on the feedforward driving force and the deviation compensation driving force; a reaction-force compensation computing section for computing a motion correction value based on a predetermined reaction-force reference value and the deviation compensation driving force; and a control-deviation computing section for computing the control deviation based on a deviation between the motion reference value and a motor motion detection value, and the motion correction value.
    Type: Grant
    Filed: January 25, 2011
    Date of Patent: July 22, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hidetoshi Ikeda, Yoshihiro Marushita, Koichiro Ueda, Yuji Igarashi, Kiyoshi Maekawa
  • Patent number: 6871810
    Abstract: A magnetic tape is packed prior to removal from a tape drive. The tape is packed by completely unwinding the tape and then completely rewinding the tape without reading or writing to the tape. Completely unwinding the tape and then completely rewinding the tape reduces air entrainment and thereby reduces the susceptibility of the tape to damage after removal from the tape drive.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: March 29, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Richard D. Barndt, Erik Vaaler
  • Publication number: 20040079825
    Abstract: A tape medium running device which can more correctly detect erroneous detection of a winding diameter, prevent an approach from being made to the end of the magnetic recording tape at high running speed and causing a damage on the tape, and can shorten fast forwarding/rewinding time. In this device, a winding diameter change detecting unit detects a change in winding diameter, and a ratio of a detected change in diameter and a maximum value of changes in winding diameter having been detected previously is compared with a predetermined winding diameter change comparison reference to detect abnormality. Thus, it is possible to prevent any approach from being made to the end of the magnetic recording tape at a high running speed based on an erroneous detection to causing a damage on the tape, and to shorten time for fast forwarding and rewinding.
    Type: Application
    Filed: March 3, 2003
    Publication date: April 29, 2004
    Applicant: Matsushita Elec. Ind. Co. Ltd.
    Inventors: Naohisa Tanabe, Kenjiro Nakamura
  • Patent number: 6193183
    Abstract: A tape tension control apparatus for controlling tape tension by supplying a current to a reel motor for driving a reel in accordance with a diameter of a tape roll includes a rotational speed detector for detecting the rotational speed of the tape roll a; rotational speed comparator for comparing a rotational speed detected by the rotational speed detector and a standard rotational speed corresponding to the diameter of the tape roll; and a current corrector for correcting the value of the current supplied to the reel motor in accordance with a comparison result from the rotational speed comparator in such a manner that the speed of rotation of the reel motor becomes equal to the standard rotational speed.
    Type: Grant
    Filed: August 4, 1998
    Date of Patent: February 27, 2001
    Assignee: Sony Corporation
    Inventor: Masaki Yoshizawa
  • Patent number: 6186430
    Abstract: A sensing assembly for use in determining if magnetic tape within a single reel tape cartridge properly connects to a takeup reel within a tape drive during loading of the tape cartridge, so that the magnetic tape can be wound between the tape cartridge and the tape drive as data is transferred to or from the magnetic tape. The sensing assembly comprises at least one sensing apparatus for providing feedback on connection status to prevent connection failures from rendering the tape drive inoperable.
    Type: Grant
    Filed: April 16, 1999
    Date of Patent: February 13, 2001
    Assignee: Benchmark Tape Systems Corporation
    Inventor: James Zweighaft