wip

Modelling/physics model.txt

@@ -1,5 +1,5 @@
-Pt = Ph + Pm = Pp + Pa + k*v + f*v²
+Pt = Ph + Pm = max(0, Pp + Pa + k*v + f*wv²)
-Pp = max(0, -m*g*vv)
+Pp = -m*g*vv
 Pa = 1/2*m*(vdt² - v0²)/dt = m*a*(v0 + 1/2*a*dt)
 
 Pt: total power, in W
@@ -9,8 +9,9 @@ Pp: potential power (in W, due to potential energy change)
 Pa: acceleration power (in W, due to kinetic energy change)
 k: kinetic friction coefficient (dry friction)
 f: fluid friction coefficient (air friction)
-v: velocity, in m/s
+v: velocity, in m/s, assumed to be always positive or zero
-vv: vertical velocity (in m/s, positive => going uphill)
+vv: vertical velocity (in m/s, positive when going uphill)
+wv: wind velocity, in m/s (velocity of the wind relatively to the vehicle, projected on the forward direction, can be approximated by wv = v)
 g: gravity constant (-9.8 m.s⁻²)
 m: mass in kg