Solve the puzzle

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Across
  1. 2. measure of the rate of change of position of an object with respect to time
  2. 5. time taken to reach the desired peak value
  3. 10. conventional controller required to improve the transient response
  4. 11. a system with damping ratio is zero
  5. 12. a response of a control system with respect to time
  6. 15. system with damping factor equal to one
Down
  1. 1. a system where the output has no influence or effect on the control action
  2. 3. the number of poles at origin is known as
  3. 4. system uses feedback to adjust its behavior
  4. 6. a control system that automatically adjusts its behavior based on the input and feedback
  5. 7. time taken to reach 90% of final value
  6. 8. a system with damping ratio is less than one
  7. 9. the highest power of the characteristic equation is known as
  8. 13. graphical representation of the frequency response of a system
  9. 14. the time when transient response is completely vanish