- #1
sicro
- 8
- 0
1. Homework Statement
If you could please tell me the "fall" laws for displacement, velocity and acceleration for a cam with constant acceleration.
3. The Attempt at a Solution
Could only manage to find the laws for the rising part, in a 1996 book.
Didnt find the laws on google either. Just mentions of the existence of the constant acceleration motion law.
The fall is opposite to the rise, but I don't know how to "mirror" the laws.
For ex: Displacement: Xe= (Xemax/((1-ki)*(Xi)1^2))*(-ki*(Xi)1^2+2*(Xi)1*Xi-Xi^2)
Xe=movement[rad], Xemax=max value for Xe [rad], Xi=current angle of rotation [rad], Xi1=total angle of rotation for rise/dwell or fall. (in this case Rise), k1=point where the "bend" of the curve-in the chart- changes- in my case it is Xemax/2;
So, to reverse that, I don't know what I must do...
Thank you! And I am sorry if my English isn't very good.. I am from Eastern Europe.
If you could please tell me the "fall" laws for displacement, velocity and acceleration for a cam with constant acceleration.
3. The Attempt at a Solution
Could only manage to find the laws for the rising part, in a 1996 book.
Didnt find the laws on google either. Just mentions of the existence of the constant acceleration motion law.
The fall is opposite to the rise, but I don't know how to "mirror" the laws.
For ex: Displacement: Xe= (Xemax/((1-ki)*(Xi)1^2))*(-ki*(Xi)1^2+2*(Xi)1*Xi-Xi^2)
Xe=movement[rad], Xemax=max value for Xe [rad], Xi=current angle of rotation [rad], Xi1=total angle of rotation for rise/dwell or fall. (in this case Rise), k1=point where the "bend" of the curve-in the chart- changes- in my case it is Xemax/2;
So, to reverse that, I don't know what I must do...
Thank you! And I am sorry if my English isn't very good.. I am from Eastern Europe.