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A. Consider the characteristic equations below, comment on their system stability? 1. D(s)=s4 +253 +852 + 4s + 3 2. D(s)=s5 +
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A 2 s+ 253 +85² + 4st 3 =0 ܟܙܠܐ Rh Table 3 s4 + 8 - 53 + 2 4 6 + O + 3 + 3 in the R- curray no All the elements in Ist columم (۱ 55 +s4+ 383 +352 +65 +420 + 1 3 6 4 Sa+ 1 3 o 2 tot sic sa 36 - 2 4 E 2136-3) -46 3E-2 C 4 sº + small no. Replace o in sகு GO RUS) s(8245 +1) (+3)(+4) CoE a Sis?+s+1) ts+3)(4+4) +K=0 3) S (52+75 +12)|s2+8+1)+K=0 = S154 +853 + 2052+195+12) + K =0be stable if Ist column Clement will be posllave Csome sign) system will Hence kyo and 238.8759+k 1418 >0 Ky - 23,8.75 and (1

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