Register
A train protection system automatically applies the brakes of a train if the speed limit for a segment of track is exceeded, or if the train enters a track segment that is currently signaled with a red
67.5k views
4 votes
A train protection system automatically applies the brakes of a train if the speed limit for a segment of track is exceeded, or if the train enters a track segment that is currently signaled with a red light (i.e., the segment should not be entered). Giving reasons for your answer, explain which reliability metric you would use to specify the required reliability for such a system.

User Wayne Maurer
by
3.9k points

1 Answer

4 votes

Answer:

The most effective metric to use is the Probability of Failure on Demand .

Step-by-step explanation:

The Probability of Failure on Demand is the probability that a system will respond correctly if a request is made for the service at a given point in time.

The metrics of the protection system is used when the demands for sparse, in other words not frequent.

There are five requirements:

  • system should check for light color between the two segments
  • color of the segment is red when brakes are applied
  • speed is higher than the speed limit
  • color, train speed limit are checked
  • if the train exceeds speed and the light is red

For instance, if there are 100 trains, each having 0.001 % chance, the probability of a train failing to stop is 0.0001

User Jeremy Roy
by
3.5k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

3.6m questions

4.6m answers

Other Questions

Implement this C program by defining a structure for each payment. The structure should have at least three members for the interest, principle and balance separately. And store all the payments in a structure
Solving for dominant strategies and the Nash equilibrium Suppose Andrew and Beth are playing a game in which both must simultaneously choose the action Left or Right. The payoff matrix that follows shows
The steady-state data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1200 K and 400 K, respectively. For each case, evaluate the net power developed by the cycle,
Name the author the "the journey to the centre of the earth"​
The fully corrected endurance strength for a steel rotating shaft is 42 kpsi, the ultimate tensile strength is 120 kpsi, the yield strength Sy=65 kpsi, and the fatigue stress correction factor Kf = 1.96.
Link Copied!