2 Lumped parameter system are those for which the hysical characteristics are assumed to be concentrated in one or more,and thus independent of any special distribution For example springs are massless and electrical leads resistanceless 3 A stationary or time-invariant system is one whose parameters do not vary with time 4 A single-variable system is defined as one with only one output for one reference or command input(siso) 5 A multivariable(MIMO)system has any number of inputs and outputs A continuous-variable system is one for which all the system variables are continuous functions of time 2022-2-11 62022-2-11 6 2 Lumped parameter system are those for which the physical characteristics are assumed to be concentrated in one or more “lumps” and thus independent of any special distribution .For example springs are massless and electrical leads resistanceless. 3 A stationary or time-invariant system is one whose parameters do not vary with time. 4 A single-variable system is defined as one with only one output for one reference or command input (SISO) 5 A multivariable (MIMO)system has any number of inputs and outputs. 6 A continuous-variable system is one for which all the system variables are continuous functions of time