To reduce amplitude, one normally uses an attenuator.
There may be specific circumstances where it can become slightly more complicated, but the approach you're proposing ("an extra Negative Step Signal") is very unusual.
I need the Step Signal for a certain time and then need to reduce it for a certain time and then once again so on... yes it is unusual. Is it possible to do something like this?
I tried using Pulse but then Pulse signal completely goes down to zero and its of no use to me. tried Step with Exponential Decrease, its not good as well... Is there a way?
I think the best way to deal with my problem is to use 1 step signal...
But What I need to achieve is for 10 secs i need Amplitude as 5 and then drop it down to 3. How do i achieve this?
Well ok. Since people here have the idea about the system. The desired result is to stop the piston before it reaches end position in the software. This allows to reduce the high pressure buildup in the system as the piston is completely closed. Or in simple words, stop the piston after .8m, as the stroke length is 1m
The System overview is as in attachment. The idea is to stop the piston before it reaches end position. Using just a Step Signal, it completely closes the piston....
What I am trying to do is in figure below, but then it still doesnt work. Is there a way to just completely shut off the Step Signal, once my piston reaches 0.8m.
Yes, Hopsan works like AMESIM....and downloaded by googling it, the first link is download for Hopsan.
Your program has a sum block. Put a sum block after your original step and make another step that has the timing you want only negative in polarity and wire it to the sum block.
Or put a multiply block in with your step as one input and another source that varies from 0-1 with 1 being full on.
Ok, this is what I did....When I use the second step as a +ve .8 value, the piston moves completely. But when I make it -ve 0.8 it just doesnt move....Screen shot below
