Explain Relay with Dead zone
Answers
Let us recall the basic definition of linear system. Linear systems are those where principle of superposition (if the two inputs are applied simultaneously, then output will be the sum of two outputs) is applicable but in case of highly non linear system we cannot apply principle of superposition. Analysis of different non linear system is very difficult because of non linear behavior. Also we cannot use pole zero method in order to analyse non linear systems because pole zero method is strictly restricted to linear systems. Instead of these disadvantages, there are some advantages of having non linear systems and they are written below:
Non linear systems can perform better than the linear systems.
Non linear systems are less costly than the linear systems.
They are usually small and compact in size as compared to linear system.
In practice, all physical systems have some kind of non linearity. Sometimes it may even be desirable to introduce a non linearity deliberately in order to improve the performance of a system and making its operation safer. At it result, the system is more economical than linear system. One of the simplest examples of a system with an intentionally introduced non linearity is a relay controlled or ON/OFF system. For instance, in a typical home heating system, a furnace is turned ON when the temperature falls below a certain specified value and OFF when the temperature exceeds another given value. Here we are going to discuss two different types of analysis or method for analyzing the non linear systems. The two methods are written below and briefly discussed with the help of example.