5. Analysis by state variables

5.1 State variables

The state variables of a system are a set of n independent parameters x ₁ (t), x ₂ (t),...x _n (t) such that the single data x ₁ (t ₀ ), x ₂ (t ₀ ),...x _n (t ₀ ) suffice to describe, exhaustively, the state of the system at time t = t ₀ . This means that any quantity of the system can then be determined, at time t...