Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Patent
1996-06-19
1998-08-04
Nguyen, Tan Q.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
701102, 318603, 318608, 318696, 388805, 388911, 388912, G05B 1106
Patent
active
057909717
ABSTRACT:
A frequency-locked stepping position control servo (FLSPS) system for driving a stepping motor. It essentially comprises a means for driving the stepping motor to move an object toward a target according to a driving signal, a means for detecting position of the object, a position-to-frequency converter to feedback the position information and a microprocessor-based slope-varied frequency-controlled oscillator (.mu.P-SVFCO) to generate the driving frequency. The .mu.P-SVFCO includes a microprocessor to ease the implementation of the control law and utilizes the slope-varied technique to adaptively pump the pulse train frequency of the driving signal. In addition, a one-bit clock is provided to dynamically maintain the position of the object when the target position is reached. The FLSPS system is capable of achieving similar system acquisition times for different target commands among a wide-range of positioning control commands.
REFERENCES:
patent: 4644749 (1987-02-01), Somes
patent: 4810941 (1989-03-01), Ohishi et sl.
patent: 4999558 (1991-03-01), Onodera et al.
patent: 5548455 (1996-08-01), Sato
National Science Council
Nguyen Tan Q.
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