LEI Kai, ZOU Li-xin, ZHANG Yao-ming, XIA Shao-jian, DONG Jian . Subdivision control technique in synchronic radiation beam position monitoring system[J]. Editorial Office of Optics and Precision Engineering, 2003,(3): 276-280
LEI Kai, ZOU Li-xin, ZHANG Yao-ming, XIA Shao-jian, DONG Jian . Subdivision control technique in synchronic radiation beam position monitoring system[J]. Editorial Office of Optics and Precision Engineering, 2003,(3): 276-280DOI:
The PWM subdivision driving technique based on a single chip machine control is used to achieve the high-precision movement and location of the detection and adjustment mechanism. The application of different currents to the two-phase windings of the stepper motor causes the constant amplitude uniform rotation of resultant current vector to realize the 32 subdivision microstep driving. The nonlinear error of stepper motor windings results in the nonuniformity of step angle after subdivision
and the maximum error goes up to 24.8%. After the error is corrected by lagrange polynominal fitting
the subdivision accuracy is improved
and the maximum error is 8.1%.
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references
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