2. Time-varying system, in which one or more parameter values change with time, so that the whole characteristic also changes with time.
For linear continuous systems, when one or more parameters in the system change with time (that is, as a function of time), its mathematical model is a linear differential equation with variable coefficients. For linear discrete systems, when one or more parameters in the system change with time (that is, the function of time), its mathematical model is a linear difference equation with variable coefficients.
Extended data:
According to the characteristics of the system, the system can be divided into the following categories:
1, linear system and nonlinear system
2. Stable (time-invariant) systems and time-varying systems
3. Continuous time systems and discrete time systems
4. Causal system and non-causal system
The system can be divided into lumped parameter system and distributed parameter system according to whether its parameters are lumped or distributed. According to whether the system contains source or not, it can be divided into passive system and active system. According to whether the system contains memory elements, it can be divided into real-time system and dynamic system.
Baidu Encyclopedia-Constant System
Baidu Encyclopedia-Time-varying System