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Interactive Root Locus
1 + K[N(s)/D(s)] = 0
Numerator N(s) [e.g., 1]
Denominator D(s) [e.g., 1, 6, 8, 0 for s(s+2)(s+4)]
Calculate System & Plot
Vary Gain (K):
0.00
Closed-Loop Poles:
Calculate system first...
Marginal Stability (jω Crossings):
None
Key Concepts
Rule: # Branches
The number of root locus branches equals the number of open-loop poles.
Rule: Start & End
Branches start at open-loop poles (K=0) and end at open-loop zeros or infinity.
Stability Insight
System is stable while all closed-loop poles remain in the left-half s-plane.