control-toolbox · jbcaillau · Dec 5, 2025 · Dec 3, 2025 · Dec 4, 2025 · Dec 4, 2025
diff --git a/ext/JuMPModels/bioreactor.jl b/ext/JuMPModels/bioreactor.jl
@@ -132,7 +132,9 @@ function OptimalControlProblems.bioreactor(
     )
 
     # objective
-    @objective(model, Max, 0.5 * Δt * sum(dc[k] + dc[k - 1] for k in 1:N))
+    @objective(model, Min, -0.5 * Δt * sum(dc[k] + dc[k - 1] for k in 1:N))
 
     return model
 end
+
+
diff --git a/ext/JuMPModels/glider.jl b/ext/JuMPModels/glider.jl
@@ -131,7 +131,7 @@ function OptimalControlProblems.glider(
     )
 
     # objective
-    @objective(model, Max, x[N])
+    @objective(model, Min, -x[N])
 
     return model
 end
diff --git a/ext/JuMPModels/insurance.jl b/ext/JuMPModels/insurance.jl
@@ -148,7 +148,7 @@ function OptimalControlProblems.insurance(
     )
 
     # objective
-    @objective(model, Max, 0.5 * Δt * sum(dc[i] + dc[i - 1] for i in 1:N))
+    @objective(model, Min, -0.5 * Δt * sum(dc[i] + dc[i - 1] for i in 1:N))
 
     return model
 end
diff --git a/ext/JuMPModels/jackson.jl b/ext/JuMPModels/jackson.jl
@@ -109,7 +109,7 @@ function OptimalControlProblems.jackson(
     )
 
     # objective
-    @objective(model, Max, x₃[N])
+    @objective(model, Min, -x₃[N])
 
     return model
 end
diff --git a/ext/JuMPModels/rocket.jl b/ext/JuMPModels/rocket.jl
@@ -119,7 +119,7 @@ function OptimalControlProblems.rocket(
     )
 
     # objective
-    @objective(model, Max, h[N])
+    @objective(model, Min, -h[N])
 
     return model
 end
diff --git a/ext/JuMPModels/space_shuttle.jl b/ext/JuMPModels/space_shuttle.jl
@@ -230,7 +230,7 @@ function OptimalControlProblems.space_shuttle(
         end
     )
 
-    @objective(model, Max, θ[N])
+    @objective(model, Min, -θ[N])
 
     return model
 end
diff --git a/ext/MetaData/steering.jl b/ext/MetaData/steering.jl
@@ -14,4 +14,4 @@ steering_meta = OrderedDict(
         x₃_tf=45,
         x₄_tf=0,
     ),
-)
+)
diff --git a/ext/OptimalControlModels/bioreactor.jl b/ext/OptimalControlModels/bioreactor.jl
@@ -78,7 +78,7 @@ function OptimalControlProblems.bioreactor(
             (μ2 - u(t) * β) * b(t),
         ]
 
-        ∫(μ2 * b(t) / (β + c)) → max
+        -∫(μ2 * b(t) / (β + c)) → min
     end
 
     # METHANE PROBLEM

diff --git a/ext/OptimalControlModels/glider.jl b/ext/OptimalControlModels/glider.jl
@@ -90,7 +90,7 @@ function OptimalControlProblems.glider(
         ż(t) == dynamics(x(t), vx(t), vy(t), cL(t))
 
         # objective
-        x(tf) → max
+        -x(tf) → min
     end
 
     function dynamics(x, vx, vy, cL)

diff --git a/ext/OptimalControlModels/insurance.jl b/ext/OptimalControlModels/insurance.jl
@@ -108,7 +108,7 @@ function OptimalControlProblems.insurance(
         ẋ(t) == [(1 - γ * (t - t0) * vprime / dUdR(t)) * h(t), h(t), (1 + σ) * I(t) * fx]
 
         # objective
-        ∫(U(t) * fx) → max
+        -∫(U(t) * fx) → min
     end
 
     # initial guess

diff --git a/ext/OptimalControlModels/jackson.jl b/ext/OptimalControlModels/jackson.jl
@@ -71,7 +71,7 @@ function OptimalControlProblems.jackson(
             (1 - u(t)) * k3 * b(t),
         ]
 
-        x[3](tf) → max
+        -x[3](tf) → min
     end
 
     # initial guess

diff --git a/ext/OptimalControlModels/rocket.jl b/ext/OptimalControlModels/rocket.jl
@@ -81,7 +81,7 @@ function OptimalControlProblems.rocket(
         ẋ(t) == dynamics(h(t), v(t), m(t), T(t))
 
         # objective
-        h(tf) → max
+        -h(tf) → min
     end
 
     # dynamics

diff --git a/ext/OptimalControlModels/space_shuttle.jl b/ext/OptimalControlModels/space_shuttle.jl
@@ -139,7 +139,7 @@ function OptimalControlProblems.space_shuttle(
         ẋ(t) == dynamics(x(t), u(t))
 
         # objective
-        θ(tf) → max
+        -θ(tf) → min
     end
 
     # dynamics

diff --git a/ext/OptimalControlModels/steering.jl b/ext/OptimalControlModels/steering.jl
@@ -99,4 +99,4 @@ function OptimalControlProblems.steering(
     )
 
     return docp
-end
+end
diff --git a/ext/OptimalControlModels_s/glider_s.jl b/ext/OptimalControlModels_s/glider_s.jl
@@ -100,7 +100,7 @@ function OptimalControlProblems.glider_s(
         ∂(vy)(t) == (L * vx(t) - D * w) / (m * v) - g
 
         # objective
-        x(tf) → max
+        -x(tf) → min
     end
 
     # initial guess

diff --git a/ext/OptimalControlModels_s/insurance_s.jl b/ext/OptimalControlModels_s/insurance_s.jl
@@ -110,7 +110,7 @@ function OptimalControlProblems.insurance_s(
         ∂(x₃)(t) == (1 + σ) * I(t) * fx
 
         # objective
-        ∫(U(t) * fx) → max
+        -∫(U(t) * fx) → min
     end
 
     # initial guess

diff --git a/ext/OptimalControlModels_s/jackson_s.jl b/ext/OptimalControlModels_s/jackson_s.jl
@@ -69,7 +69,7 @@ function OptimalControlProblems.jackson_s(
         ∂(x₂)(t) == u(t) * (k1 * a(t) - k2 * b(t)) - (1 - u(t)) * k3 * b(t)
         ∂(x₃)(t) == (1 - u(t)) * k3 * b(t)
 
-        x₃(tf) → max
+        -x₃(tf) → min
     end
 
     # initial guess

diff --git a/ext/OptimalControlModels_s/rocket_s.jl b/ext/OptimalControlModels_s/rocket_s.jl
@@ -85,7 +85,7 @@ function OptimalControlProblems.rocket_s(
         ∂(m)(t) == -T(t) / c
 
         # objective
-        h(tf) → max
+        -h(tf) → min
     end
 
     # initial guess

diff --git a/ext/OptimalControlModels_s/space_shuttle_s.jl b/ext/OptimalControlModels_s/space_shuttle_s.jl
@@ -158,7 +158,7 @@ function OptimalControlProblems.space_shuttle_s(
         (v / (r * cos(θ(t)))) * cos(γ(t)) * sin(ψ(t)) * sin(θ(t))
 
         # objective
-        θ(tf) → max
+        -θ(tf) → min
     end
 
     # initial guess: linear interpolation for h, v, gamma (NB. t0 = 0), constant for the rest

diff --git a/ext/OptimalControlModels_s/steering_s.jl b/ext/OptimalControlModels_s/steering_s.jl
@@ -99,4 +99,4 @@ function OptimalControlProblems.steering_s(
     )
 
     return docp
-end
+end
diff --git a/test/runtests.jl b/test/runtests.jl
@@ -35,6 +35,7 @@ problems_to_exclude = [
     :insurance,
     :robot,
     :space_shuttle,
+    :steering,
 ]
 list_of_problems = setdiff(list_of_problems, problems_to_exclude)
-Original file line number
+Diff line change
@@ Expand Up / @@ -14,4 +14,4 @@ steering_meta = OrderedDict( @@
             x₃_tf=45,
             x₄_tf=0,
         ),
-    )
+    )