- Nyquist Diagram 0 0 5 Imaginary Axis 1 5 2 2 5 3 6 5 2 1 0 3 Real Axis Figure 4 Rajah 41 A Based On The 1 (17.69 KiB) Viewed 35 times
- Nyquist Diagram 0 0 5 Imaginary Axis 1 5 2 2 5 3 6 5 2 1 0 3 Real Axis Figure 4 Rajah 41 A Based On The 2 (70.74 KiB) Viewed 35 times
(a) Based on the Nyquist Plots in Figure 4, determine: [Berdasarkan lakaran Nyquist dalam Rajah 4, tentukan:) (i) What is the order of the system? (Apakah tertiba sistem tersebut?] (C2 / 5 Marks / Markah) (ii) Does the system have any zero? [Adakah sistem tersebut mempunyai sebarang sifar?] (C27 5 Marks / Markah) (iii) What is the number of integrators in the system? [Berapakah bilangan pengamir dalam sistem tersebut?) (C2 / 5 Marks / Markah) (iv) Is the system stable? [Adakah sistem tersebut stabil?] (C2/ 5 Marks / Markah) Note: Give justification for your answers. [Nota: Berikan justifikasi bagi jawaban anda. (b) The loop transfer function of a control system is given as: [Fungsi pindah gelung suatu sistem kawalan diberikan seperti berikut: K G(s)H(8) = s(s2 + 8s + 25) (1) If K = 50, draw the Nyquist plot for G(jo)H(jo), for 0 = 0) to w=00. [Jika K = 50, lukiskan plot Nyquist untuk G(jw) H(jw), bagi 0 = 0 ke 0 = 0.1 (C4/60 Marks / Markah) (ii) What is the gain margin of the system based on the Nyquist plot in (i). Apakah jidar untung untuk sistem tersebut berdasarkan plot Nyquist dalam (1).) (C4/10 Marks / Markah) (iii) Determine the stability of the closed loop system based on the Nyquist plot in (i). Justify your answer.