MODEL REFERENCE CONTROL OF NONLINEAR SYSTEMS WITH RELATIVE ORDER TWO

Abstract

The design of a model reference nonlinear feedback controller is proposed for the control of nonlinear system &xdot; = f(x) + g(x)u + d(t), y = h(x) which has a relative order two. The controller design method is applied theoretically to the concentration control of a non-isothermal CSTR. Integral and derivative control actions are incorporated in the control law. Theoretical analysis on robustness of the proposed controller under process/model mismatch is provided.

KEYWORDS:

• Nonlinear control
• PID action
• Robust
• CSTR
• Relative order two

Additional information

Notes on contributors

Y.S.N. MALLESWARARAO

Author to whom correspondence is to be addressed at I.I.T. Madras 600 036, India.