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International Journal of Control, Vol.69, No.6, 819-836, 1998
A simple method to guarantee closed-loop stability when continuous-time systems are discretized
Sophisticated techniques fail to guarantee closed loop stability of discretized continuous-time systems. The simple, foolproof approach of mapping eigenvalues under z = e(sT) is explored here. The result has a partial fraction type solution, implementable by such common teaching aids as Program CC. An increase in controller order may be necessary, but guidance on extra pole locations is given based on elementary measures such as gain and phase margin.
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