CDR

ThrustDef.jl

@@ -5,39 +5,59 @@ using NumericalIntegration
 
 theme(:juno)
 
-rate = 180u"°/s"
+function impulse_calc(max_deflection = 15u"°")
-
+    if max_deflection == 0
-max_deflection = 15u"°"
+        return 0u"N*s"
+    end
 
+    servo_speed = 180u"°/s"
 
     dt = 0.001u"s"
-time = 0u"s":dt:2u"s"
+    time = 0u"s":dt:3.5u"s"
 
+    servo_rate = dt * servo_speed
 
-angle = [(t * rate) % max_deflection for t in time]
+    # angle = [(t * rate) % max_deflection for t in time]
+
+    angles = zeros(length(time)) .* u"°"
+    angle = 0u"°"
+
+    for i = 1:length(time)
+        if abs(angle) > max_deflection
+            servo_rate = servo_rate * -1
+        end
+
+        angle = angle + servo_rate
+
+        angles[i] = angle
+
+    end
+    v = angles .|> cos .|> abs
+    h = angles .|> sin .|> abs
 
-v = cos.(angle) .* u"N"
-h = sin.(angle) .* u"N"
 
     horizontal_impulse = let
         vimp = integrate(time, v)
         himp = integrate(time, h)
 
-    round(himp / (vimp + himp) * 100) |> Int
+        himp / (vimp + himp) * 100
 
     end
+    return horizontal_impulse
+end
+
+deflections = (0.1:0.1:20)u"°"
+
+impulse = impulse_calc.(deflections)
 
 let
-    plot(time, v, label = "Vertical")
+    plot(deflections, impulse, label = "Horizontal Impulse", legend = :topleft, line = 3)
-    plot!(time, h, label = "Horizontal")
+    yticks!(0:2:15, string.(0:2:15) .* "%")
-    yticks!(0:0.25:1, string.(0:25:100) .* "%")
+    ylabel!("Percent of Impulse")
-    ylabel!("Percent of Thrust")
+    xticks!(0:2:20, string.(0:2:20) .* "°")
-    xticks!(0:0.5:2, string.(0:0.5:2) .* "s")
+    xlabel!("Maximum TVC Deflection")
-    xlabel!("Time")
+    title!("Horizontal Impulse as a function \nof maximum TVC deflection")
-    title!(
+    vline!([8], label = "Current Design", line = (3, :dash, :mediumpurple))
-        "Max Deflection: $(max_deflection)\n" *
-        "Vertical Impulse: $(100-horizontal_impulse)% | Horizontal Impulse: $(horizontal_impulse)%",
-    )
 end
 
-savefig("ThrustDef.png")
+# savefig("ThrustDef.png")