Why is an RLC Circuit Considered a Dynamic System?

AI Thread Summary
An RLC circuit is considered a dynamic system because it exhibits time-dependent behavior, similar to a pendulum that constantly exchanges energy between kinetic and potential forms. In an RLC circuit, the inductor and capacitor store and transfer energy back and forth, resulting in oscillations of current and voltage. The presence of resistance (R) introduces damping, analogous to friction in mechanical systems, which affects the energy balance over time. This time dependence distinguishes dynamic systems from static ones, where outputs do not change with time. Understanding these principles highlights the dynamic nature of RLC circuits in contrast to simpler, time-independent systems.
omka
Messages
1
Reaction score
0
TL;DR Summary
why does a RLC circuit considered as dynamic system
Hi !
I'm trying to understand why does we say that RLC circuit is a dynamic system. An example of a dynamic system that i know is a pendulum. The swinging of a pendulum depends on the applied force but also on the past force. What about the output of RLC circuit ? What is the relation between the output of this circuit and his input?
Tank you
 
Engineering news on Phys.org
Basically - within the system, it changes state or the balance of energy "naturally". It is, in sense, a pendulum. A pendulum is constantly changing energy between Kinetic and Potential energy. There is also drag or friction in the system that will over time stop the pendulum.

In RLC - the Inductor stores energy in a magnetic field, and the Capacitor stores energy in an electric field- and then the two transfer energy back and forth, we see this as an oscillation of current and voltage.
 
  • Like
Likes omka
My understanding of what makes a system dynamic (or dynamical) is when there is time dependence.

For example a voltage divider made of two (ideal) resistors exhibits no time dependence on the generated divider voltage V=IR. Whereas the pendulum, mass-spring systems, LC circuits (the R is really a damping element which removes energy from the system, analogous to friction in the two mechanical examples) are all time dependent, there is always a d(something)/dt.
 
  • Like
Likes omka
Thread 'Weird near-field phenomenon I get in my EM simulation'
I recently made a basic simulation of wire antennas and I am not sure if the near field in my simulation is modeled correctly. One of the things that worry me is the fact that sometimes I see in my simulation "movements" in the near field that seems to be faster than the speed of wave propagation I defined (the speed of light in the simulation). Specifically I see "nodes" of low amplitude in the E field that are quickly "emitted" from the antenna and then slow down as they approach the far...
Hello dear reader, a brief introduction: Some 4 years ago someone started developing health related issues, apparently due to exposure to RF & ELF related frequencies and/or fields (Magnetic). This is currently becoming known as EHS. (Electromagnetic hypersensitivity is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed.) She experiences a deep burning sensation throughout her entire body, leaving her in pain and exhausted after a pulse has occurred...
Back
Top