Re: Blending function
- From: leo <e1e120032000@xxxxxxxxx>
- Date: Wed, 21 May 2008 23:23:48 -0700 (PDT)
On 21 Mai, 18:14, Helmut Wabnig <hwabnig@ .- --- -. dot .- t> wrote:
On Wed, 21 May 2008 05:28:58 -0700 (PDT),leo<e1e120032...@xxxxxxxxx>
wrote:
Hi friends
We have the portal robot with two axis X and Y. For each axis we have
the servo drive that we can write in the trajectory values every 2
msec.
From this trajectory the drive will calculate the velocity and
acceleration. If we have two points P1 with coordinates X1 and Y1 and
P2 with coordinates X2 and Y2 we have to find the blendig function
between these two points. It would be the function P(t) which is a
polynom of the 5th order with coeficients C0, C1, C2, C3 and C4. The
coeficients are known if we know the velocity, acceleration and
coordinates of the points P1 and P2.
My question is: How can I get values X(t) and Y(t) at the moment t if
I have the function P(t).
For example at the moment t=2msec the value of the polynom would be:
P(2msec) = C0 + C1*2msec + C2*(2msec)^2 + C3*(2msec)^3 + C4 *
(2msec)^4 + C5 * (2msec)^5
How can I get values X(2msec) and Y(2msec)?
Your function is defined in polar coordinates.http://home.scarlet.be/~ping1339/polar.htm#Polar-coordinates-of
http://www.maths.abdn.ac.uk/~igc/tch/ma1002/diff/node46.html- Zitierten Text ausblenden -
- Zitierten Text anzeigen -
Hi Helmut
Thanks for your answer. But please read on the Web site:
http://www.cim.mcgill.ca/~haptic/publications.html#Y1993
this publication:
Lloyd, J. E and Hayward, V. 1991. Real-Time Trajectory Generation
Using Blend Functions
Can you explain me on page 2 (785) what is X(t) on the graph? You can
read path displacemant. I think this is vector distance.
And how can I calculate for every axis distance if I have distance
for
vector?(in time)
Regards
.
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