test: provide additional guesses in test

Author: AayushSabharwal

test/downstream/linearization_dd.jl

@@ -33,7 +33,7 @@ op = Dict(cart.s => 10, cart.v => 0, link1.A => -pi / 2, link1.dA => 0, force.f.
     link1.x1 => nothing, link1.y1 => nothing, link1.x2 => nothing, link1.x_cm => nothing)
 @info "named_ss"
 G = named_ss(model, lin_inputs, lin_outputs; allow_symbolic = true, op,
-    allow_input_derivatives = true, zero_dummy_der = true)
+    allow_input_derivatives = true, zero_dummy_der = true, guesses = [link1.ddx_cm => 1.0])
 G = sminreal(G)
 @info "minreal"
 G = minreal(G)
@@ -45,7 +45,7 @@ ps = poles(G)
 
 lsys,
 syss = linearize(model, lin_inputs, lin_outputs, allow_symbolic = true, op = op,
-    allow_input_derivatives = true, zero_dummy_der = true)
+    allow_input_derivatives = true, zero_dummy_der = true, guesses = [link1.ddx_cm => 1.0])
 lsyss,
 sysss = ModelingToolkit.linearize_symbolic(model, lin_inputs, lin_outputs;
     allow_input_derivatives = true)