TTK4130: Modelling and Simulation
# Energy-based methods and passivity
When designing systems we often are dependent on dividing the system into smaller sub-sections and study them seperately. Energy-based methods is a practical way of examining the stability
properties of the whole system with respect to its sub-systems. Here is the general motivation:
> The interconnection of stable systems is not necessarily stable, however the interconnection of **passive** systems is passive
> and passive systems are stable