Method and apparatus for controlling the acceleration trajectory

Details Method and apparatus for controlling the acceleration trajectory Method and apparatus for controlling the acceleration trajectory

1999-06-10

2000-10-31

Masih, Karen

Electricity: motive power systems

Positional servo systems

With compensating features

318560, 318704, 318715, 318721, 318832, G05D 23275

Patent

active

061407917

ABSTRACT:
A sinusoidal acceleration trajectory controller is used in positioning a transducer at high speed to minimize vibration and acoustic noise. The controller reduces vibration and acoustic noise without sacrifice of seeking time by using a sinusoidal waveform as the actuator input. This sinusoidal waveform is a function of target track position and the seeking terminal time. When the velocity of the read/write head on the transducer reaches a maximum velocity, the sinusoidal waveform becomes a segment sinusoidal waveform, including a zero value waveform between two half sinusoidal waveforms. The amplitude of the sinusoidal waveforms and the coast period are minimized to obtain the minimum harmonic content in the segment sinusoidal waveform.

REFERENCES:
patent: 5128813 (1992-07-01), Lee
patent: 5510939 (1996-04-01), Lewis
patent: 5841262 (1998-11-01), Tang

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