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MotionDesigner Reference & User Interface > Motion Laws >
A Traditional Motion-Law
The Ramp. has three phases:
Phase 1: Acceleration : first ½ wave of a Sine function (see Segment-Parameters)
Phase 2: Zero Acceleration : Constant Velocity
Phase 3: Deceleration : last ½ wave of a Sine function : (see Segment-Parameters)
You can design an Asymmetric Segment, in which the Acceleration phase is longer or shorter than the Deceleration phase.
A motion with continuous Velocity and Acceleration, from start to end, The Jerk is finite at its start and end.
You CAN specify the:
The Start-Position usually flows from the End-Position of the Previous-Segment.
You CANNOT specify the:
Start Velocity & End Velocity
Start Acceleration & End Acceleration
Start Jerk & End Jerk
Start-Fraction × 100 = % of Segment-Width to accelerate from zero-velocity* to maximum-velocity
End-Fraction × 100 = % of Segment-Width to decelerate from maximum-velocity to zero-velocity**
Start-Fraction + End Fraction 1
Constant-Velocity % = 1- Start-Fraction – End-Fraction
* assuming Start-Range is zero
** assuming End-Range is zero
Start-Range - remove the start of the Ramp Motion-Law
End- Range- remove the end of the Ramp Motion-Law
0 ≤ Start-Range < End-Range ≤ 1
See also : Tutorial 5: Edit the Start of a Traditional Motion-Law
See also : Tutorial 9: Asymmetrical Motions
1 x Ramp Segment, Symmetrical
Asymmetric Segments, in which the Acceleration phase is longer or shorter than the Deceleration phase.
Motion with a long displacement, in which the maximum-velocity is less than other motion-laws.
EXAMPLE (see image below)
•Start-Fraction ≠ End-Fraction
•Start-Fraction = 0.7
•End-Fraction = 0.3
•Start-Fraction + End-Fraction = 1
Constant-Velocity % = 0%
E.g.: RAMP Segment: Start-Fraction = 0.7, End-Fraction = 0.3
(Constant-Velocity Fraction = 0)