The open-loop transfer function of a standard negative feedback control system is nominally (s) = 1 + 2 s(s + 1) , where > 0 is a time constant in seconds. Determine how many seconds loop delay > 0 can be tolerated if a phase margin of more than 75 is required in the presence of such delay. Derive an answer in terms of within the space provided below.

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Q2(ii) The open-loop transfer function of a standard negative feedback control system is nominally 71 +2 A(S) = s(ts + 1)' where t > 0 is a time constant in seconds. Determine how many seconds loop delay d > 0 can be tolerated if a phase margin of more than 75 is required in the presence of such delay. Derive an answer in terms of t within the space provided below! [3 marks] Q2(ii) The open-loop transfer function of a standard negative feedback control system is nominally 71 +2 A(S) = s(ts + 1)' where t > 0 is a time constant in seconds. Determine how many seconds loop delay d > 0 can be tolerated if a phase margin of more than 75 is required in the presence of such delay. Derive an answer in terms of t within the space provided below! [3 marks]