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This paper develops the control system of a piezoelectric micropositioner with an optimal PID control approach. In the control system development, the piezoelectric micropositioner is actuated by a voltage amplifier which is implemented by a linear operational amplifier with a compensator cascaded and the optimal PID control approach for trajectory tracking is developed from an approximated second-order...
In recent works, it has been shown that the damping of a linear time invariant system relates to the so-called characteristic ratios (/spl alpha//sub k/, k = 1,/spl middot//spl middot//spl middot/,n - 1) which are defined by coefficients of the denominator of the transfer function. However, the exact relations are not yet fully understood. For the purpose of exploring the issue, this paper presents...
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