Dynamics and control of quasirational systems

  title={Dynamics and control of quasirational systems},
  author={S. Ramanathan and Rane L. Curl and Costas Kravaris},
  journal={Aiche Journal},
Systems having transfer functions of the form where P1(s), P2(s) and Q(s) are polynomials, are called quasirational distributed systems (QRDS). They are encountered in processes modeled by hyperbolic partial differential equations. QRDS can have an infinity of right half-plane zeros which causes large phase lags and can result in poor performance of the closed-loop system with PID controllers. Theory on the asymptotic location of zeros of quasipolynomials is used to predict the… Expand
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