Abstract
This paper describes an optimal design method for positioning control using a dc servomotor. The positioning control system, using velocity and position feed back data, sometimes becomes unstable due to mechanical resonance of the shaft connecting motor with detector. An appropriate cutoff in high frequency of velocity is effective not only for stabilizing system but also for high transient response. Namely, it causes a 30 percent decrease in settling time for step input and 1.3 to 3 times increase in stability criteria. Finally, the procedure for optimal design is described.
