|
|
| Re: South Ferry Inner Loop Station. (1385631) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: South Ferry Inner Loop Station. |
|
|
Posted by Jace on Mon Feb 15 14:14:54 2016, in response to Re: South Ferry Inner Loop Station., posted by Stephen Bauman on Mon Feb 15 12:17:16 2016. I agree that you can design in tolerance to reduce the chance of a fault or failure. However, if you tie in the door system to another system that determines train location, now you have two systems that need that same level of redundancy. If the systems are in series, you also need a reduction of failure rates on each system by half to get to the reliability of one on its own (if parallel, the reliability of each will also have to go up but not by as much). Either way, the costs (initial and maintenence) and complexity will go up, likely significantly.If instead you go the manual route by having the crew responsible then you'd probably need a panel for them to key in a code to tell the train to limit the number of doors to open (more hardware...) at a particular station. Do you think this will be 100% effective? What are the risks if it isn't? Hint: take a look at the signs in the conductor's position at the outer loop of South Ferry for answers to both. As for the L, I'm assuming you mean keeping one panel, not one whole door opening shut. The latter would be a terrible idea. But even with one panel opening, you will take a hit on dwell time in peak periods as the ends of the train fill up at Lorimer and Bedford in particular. Not a good idea in my opinion if you're trying to maximize throughput. A better idea would have been designing a slightly shorter car to allow 9 car trains. And by the way, limiting the doors like this can be done on the present system without too much difficulty by changing the software (assuming all the stations are the same). There already is something similar (partial close command). The problem with propulsion has to do with the timing between brake release and powering up the motors. If the two steps happen in series you get bucking, if you start to power the motors before the brakes are fully released, no bucking. |
|
|
|