Quote:
Originally Posted by GearsOfFury
Roboman: Why do we think the GDC has this rule in place?
|
Stored pressure in a pneumatic system is inherently dangerous. If a part happens to fail, one must have a reliable method of quickly venting the system pressure, preferably from a single point. Requiring a single release valve is a much easier way of making sure all teams have this, rather than judging a pneumatic system's safety on a case-by-case basis. I actually believe this rule is a good one. However, I also believe that the GDC should allow a broader range of pneumatic devices, such as check valves, for next year.
Quote:
|
Originally Posted by PAR_WIG13500
I understand, and always have understood, that you were describing a different system. I just didn't want people to perceive either system as being more complex (or confusing) than it really was by trying to match the system I proposed to the system you provided a diagram of, since that is impossible due to the fact the systems are far from similar.
Also, 'simpler' is a matter of opinion, I consider mine to be simpler due to the fact that it doesn't require very much attention in the code, all you need to do is set the regulator and let it find equilibrium with the spring on its own. Also, it isn't very complex physically either. I will draw a diagram and post it for clarity.
|
I understand your system, however, it seems a little jury-rigged, to be frank. Keep in mind that the force exerted by springs changes based on how much they are extended or compressed, unless you use a constant-force spring (obviously). Also, you're relying on a relieving regulator to vent excess pressure in the cylinder. While these are more common than non-relieving regulators, the latter are certainly not rare, and could easily be confused with a pressure-relieving regulator.
In addition, to implement your system, you would need to figure out some way of controlling the regulator. You mentioned hobby servos, which could work, but they are confined to <180 degrees. Sail winch servos are not allowed, and still would not rotate enough to open and close the regulator entirely. They are also much more coarse in their movements, which could limit your true control over the cylinder.
Your system would have a variable force in addition to the variable stroke, since you're varying the pressure, rather than the amount of air in either end. As you should know, reducing the pressure also reduces the force exerted, and the spring on the end that counteracts the cylinder's rod will cause the net force to be near zero, since it's stopping the travel mid-stroke. This is obviously not good for actuating an arm, or anything that will be exerting any sort of force.