Layout Schematic

Step 4 Use the schematic to obtain a mathematical model, such as a block diagram.
Step 5 Reduce the block diagram.
Step 6 Analyze and design the system to meet specified requirements and specifica- tions that include stability, transient response, and steady-state performance.
In the next chapter we continue through the analysis and design sequence and learn how to use the schematic to obtain a mathematical model.

Review Questions

1. 
   Name three applications for feedback control systems.
   
2. 
   Name three reasons for using feedback control systems and at least one reason for not using them.
   
3. 
   Give three examples of open-loop systems.
   
4. 
   Functionally, how do closed-loop systems differ from open-loop systems?
   
5. 
   State one condition under which the error signal of a feedback control system would not be the difference between the input and the output.
   
6. 
   If the error signal is not the difference between input and output, by what general name can we describe the error signal?
   
7. 
   Name two advantages of having a computer in the loop.
   
8. 
   Name the three major design criteria for control systems.
   
9. 
   Name the two parts of a system’s response.
   
10. 
    Physically, what happens to a system that is unstable?
    
11. 
    Instability is attributable to what part of the total response?
    
12. 
    Describe a typical control system analysis task.
    
13. 
    Describe a typical control system design task.
    
14. 
    Adjustments of the forward path gain can cause changes in the transient response. True or false?
    
15. 
    Name three approaches to the mathematical modeling of control systems.
    
16. 
    Briefly describe each of your answers to Question 15.