Resources Contact Us Home
Motor control device

Image Number 18 for United States Patent #5872439.

A motor control device for controlling a swing motor which moves a head is provided with a disturbance observer and an operation suspending unit. The disturbance observer outputs a compensating signal for compensating a driving voltage V for driving the swing motor. The operation suspending unit suspends an operation of the disturbance observer, based on a detection signal supplied by a velocity sensor which detects an angular velocity of the swing motor and the driving voltage signal V for driving the swing motor. The operation suspending unit operates when the signal voltage in the disturbance observer exceeds a reference level. This arrangement solves the following problem arising when the disturbance observer is employed for controlling a motor: when the motor comes into collisions with a stopper at an edge of the motion space, the disturbance observer further drives the motor so as to oppose a motion caused by the collisions, thereby exacerbating the collision.

  Recently Added Patents
Method of and apparatus for image denoising
Memory circuit and method of forming the same using reduced mask steps
Avirulent oncolytic herpes simplex virus strains engineered to counter the innate host response
Distributed multicast packet replication with centralized quality of service
Tiger paw stationary tab
Tag-based apparatus and methods for neural networks
Digital signal processing apparatus, liquid crystal display apparatus, digital signal processing method and computer program
  Randomly Featured Patents
Endoscope system provided with low-pass filter for moire removal
Transfer of AZO dyes
Two stage automobile steering lock
Equivalent circuit for coil incorporated in circuit simulator, circuit simulator and method of preparation of same, and storage medium of circuit simulator program
Mineral-insulated electrical cable
Particle detector with particle trapping device
Calcium carbonate granulation
Correlation of video data between two display formats
Method of purifying nanotubes and nanofibers using electromagnetic radiation
Pharmaceutical dosage form for pulsatile delivery of methylphenidate