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Question

1. What is maximum force in the tow cable and when does it occur? Does this maximum force

occur when the submarine goes through its maximum acceleration? Explain your anwer.

2. What is the elongation in the tow cable due to the drag of the submarine at steady state?

3. What is the maximum velocity of the submarine and when does it occur?

You recommend that the senior officer should select a cable length that would minimize the value of

the peak force in the cable, while keeping the cable from being unnecessarily long. Therefore, you

suggest that the system should have a damping ratio = 0.707., 1, 1.3

1. Find the length of the cable for damping ratio = 0.707., 1, 1.3

2. Adjust the gain values of your block diagram to agree with this cable length.

3. Simulate and determine the maximum velocity and maximum cable force. Compare the results

with the 300 ft. cable.

4. What is the physical significance of = 0.707., 1, 1.3 in a dynamical system in relation to the shape

of the response? Why is it the advantage of the cable with = 0.707. over 1, 1.3?