Abstract
Characteristics of two time constants in a control system of a magnetic suspension and balance system (MSBS) are investigated in detail in this study. Influences of the time constants on control performance are also investigated and a performance index to optimize the time constants is proposed. The performance index includes deviation of step response and influence of disturbance, then the time constants can be optimized in consideration of the system stability and the disturbance response. Furthermore, a weight coefficient in the performance index can be used as a criterion between the stability performance and the disturbance rejection performance.
