US Patent No: 6,510,396

Number of patents in Portfolio can not be more than 2000

Symmetry compensation for encoder pulse width variation

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Importance

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Abstract

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A method of compensating for errors in the measurement of the kinematic properties of an electric power steering motor for an automobile is disclosed. The method comprises generating a set of M-ary signals; measuring the pulse width of the set of M-ary signals; and measuring the time between the edges of the set of M-ary signals. The motor velocity may be directly measured by a tachometer or other such device. The motor position signal can be used to estimate the angular velocity of the motor, by determining the change in angular position of the motor divided by the change in time.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GM GLOBAL TECHNOLOGY OPERATIONS, INC.DETROIT, MI1093
PACIFIC CENTURY MOTORS, INC.DETROIT, MI63

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Colosky, Mark Philip Vassar, MI 12 163

Cited Art Landscape

Patent Info (Count) # Cites Year
 
HONDA GIKEN KOGYO KABUSHIKI KAISHA (3)
5,029,466 System for detecting abnormality of steering angle sensor 16 1990
5,309,758 Steering angle sensor for automobile 14 1992
6,286,621 Electric power steering apparatus 12 2000
 
KABUSHIKI KAISHA TOKAI RIKA DENKI SEISAKUSHO (2)
4,955,228 Device for detecting rotation of steering wheel for automobiles 10 1989
5,088,319 Steering angle sensor 14 1990
 
KOYO SEIKO CO., LTD. (2)
6,250,417 Power steering apparatus 5 1999
6,244,372 Power steering apparatus 17 1999
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
4,838,074 Steering torque detecting device 10 1988
6,246,197 Electric power steering controller 18 1998
 
Nippondenso Co., Ltd. (2)
4,836,319 Steering control apparatus for motor vehicles 29 1987
5,828,973 Electric power steering apparatus 18 1996
 
SIEMENS AKTIENGESELLSCHAFT (2)
4,897,603 Arrangement for determining the speed and rotor position of an electric machine 12 1989
5,027,648 Method and device for measuring the angle of rotation of the steering shaft of a motor vehicle 22 1989
 
AKAI ELECTRIC CO., LTD. (1)
4,961,017 Stator for use in a brushless motor 24 1988
 
AlliedSignal Truck Brake Systems Co. (1)
5,736,852 Circuit and method for conditioning a wheel speed sensor signal 13 1995
 
ALPS ELECTRIC CO., LTD. (1)
6,155,106 Steering angle sensor unit 20 1998
 
CANON DENSHI KABUSHIKI KAISHA (1)
5,408,153 Index position detecting apparatus for an electromagnetic rotary machine 32 1994
 
DAIMLERCHRYSLER AG (1)
5,902,342 Detection of vibration in an AC traction system 7 1997
 
EATON CORPORATION (1)
4,922,197 High resolution proximity detector employing magnetoresistive sensor disposed within a pressure resistant enclosure 54 1988
 
GENERAL MOTORS CORPORATION (1)
4,924,696 Noncontacting position sensor for an automotive steering system 22 1989
 
HITACHI, LTD. (1)
5,218,279 Method and apparatus for detection of physical quantities, servomotor system utilizing the method and apparatus and power steering apparatus using the servomotor system 19 1991
 
Kollmorgen Technologies Corporation (1)
4,562,399 Brushless DC tachometer 44 1983
 
LAKE SHORE CRYOTRONICS, INC. (1)
5,293,125 Self-aligning tachometer with interchangeable elements for different resolution outputs 27 1992
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
4,437,061 Speed detector for sewing machines 10 1981
 
MERITOR HEAVY VEHICLE TECHNOLOGY, LLC (1)
5,223,760 Wheel speed sensor for drive axle 21 1991
 
NISSAN MOTOR CO., LTD. (1)
5,498,072 Anti-skid control system for automotive vehicles 23 1995
 
ORIENTAL MOTOR BOSTON TECHNOLOGY GROUP INCORPORATED (1)
5,329,195 Sensor motor 28 1992
 
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION (1)
5,717,268 Electric motor with tachometer signal generator 17 1996
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
6,244,373 Steering control apparatus for vehicle 10 1999
 
VICTOR COMPANY OF JAPAN, LTD. (1)
4,924,161 Position and speed detecting device 13 1989
 
XEROX CORPORATION (1)
4,803,425 Multi-phase printed circuit board tachometer 21 1987
 
Other [Check patent profile for assignment information] (3)
4,983,915 Device for determining the rotary angle position of rotary drives of electrical machines by evaluation of electrical voltages by sensors responding to rotary movements 22 1988
5,406,267 Method and apparatus for the monitoring of the operation of linear and rotary encoders 18 1992
5,503,421 Clutch and control mechanism for fifth wheel 9 1993

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
STEERING SOLUTIONS IP HOLDING CORPORATION (5)
7,307,416 Position sensor and assembly 1 2004
7,549,504 Quadrant dependent active damping for electric power steering 4 2006
7,543,679 Compensation of periodic sensor errors in electric power steering systems 1 2006
7,725,227 Method, system, and apparatus for providing enhanced steering pull compensation 7 2006
8,447,469 Electric power steering system control methods 0 2009
 
HUAWEI TECHNOLOGIES CO., LTD. (1)
7,245,725 Dual processor framer 10 2002
 
RPX CORPORATION (1)
7,936,854 Method and system of cycle slip framing in a deserializer 0 2008
 
WUYI FOUNDATION LIMITED LIABILITY COMPANY (1)
6,917,794 Phase compensation circuit 3 2001

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Jul 21, 2014
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00