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AMC
| Question | Answer |
|---|---|
| Recall the definition of a dynamic, finite dimensional, time invariant system, in both continuous and discrete time. | . |
| Recall the definition of stability according to Lyapunov, in both continuous and discrete time. Moreover, state which element this property belongs to, according to the mathematical structure of the system. | . |
| State when an equilibrium is isolated. | . |
| Recall the definition of region of attraction. | . |
| Recall the linearisation method and its drawbacks. | . |
| What is the phase plane? Depending on the position of the eigenvalues on the Gauss-Argand plane, illustrate all possible trajectories for a linear system. How is it used in case of a nonlinear one? | . |
| Consider a scalar function V(x), continuous with its first derivatives (C^1). Define all possible properties that it might have locally, and express the condition which makes them global. | . |
| Consider the values of x such that V(x)=V_bar, where V_bar is a positive value. What do they define? | . |
| State the Lyapunov theorem and try to prove it for both continuous and discrete time systems. | . |
| State the Krasowski-La Salle theorem. | . |
| State the necessary and sufficient condition for the asymptotic stability in linear systems. | . |
| What is the backstepping method? When and how is it used? | . |
| Recall the small gain theorem for both SISO and MIMO systems. | . |
| State the circle criterion. | . |
| Talk about control synthesis in SISO systems and make a comparison with the MIMO ones. | . |
| Recall the formal definition of poles and zeros for MIMO systems. | . |
| State the blocking property of zeros and explain its meaning in a MIMO context. | . |