Chemical Engineering Department University of Florida ECH 4323 Process Control Theory HOMEWORK No. 12 1. Indicate whether the following systems described by the transfer function Y’(s) = G(s) U’(s) are stable or unstable. i. G(s)=1s+2ii. G(s)=1s−2iii. G(s)=1siv. G(s)=1τs+1(indicate the range of values of τfor which the system is stable) v. G(s)=1s2−s−6vi. G(s)=s−3s2−s−6vii. G(s)=1τ2s2+2ςτs+1, τ>0 (indicate the range of values of ςfor which the system is stable) viii. G(s)=1s+2e−3six. G(s)=1τs+1e−3s(indicate the range of values of
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