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Course 2 : Construction of robot model overview; Projects specification (application);. Modeling. Modeling. Modeling. Modeling.
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Course 2: Construction of robot model overview; Projects specification (application);
Modeling • A particular phenomenon is represented through the model. The model is a particular knowledge assembly, obtained by approximation process, that aspire to become operational; • Scientific knowledge must be validated continuously by the experiment; • It has as aim the a priori knowledge, more precisely we wish to know how will ensuing the phenomenon before the experimentation (voire pour prevoire).
Modeling • The art of modeling: • Oaccam (1285–1349) razor: “Entities should not be multiplied unnecessarily.” “When you have two competing theories which make exactly the same predictions, the one that is simpler is the better” • KISS: kipped smart and simple
Modeling Output Input S Output Perturbation
Modeling: NM Effects Causes Black Box
(x,y,z)i1…im qm-1 (x,y,z)D j=m-1 q2 q1 j=2 j=1 q0 j=0 (x,y,z)i1…im (x,y,z)D NM: Case study
u Modeling Desires and results…an all time story y y= effects y= DESIRE u= cause What are the causes which can produce my desire?
Modeling: The feedback r y Perturb y e 0 e + r Plant Controler + + - Feedback Senzor The control system
Modeling:J. Watt governor Desire: constant angular speed for the shaft
link i y y u - C r + link i-1 link i-1 Modeling: The robot
Ac Tk Tr MSt Modeling: the robot q(t) T(t) (t) x(t) V(t)
1 2 q1 3 q2 Modeling: the robot Pr qp qd qo v q e q + + E P C S MR + - q