接入test_mql大质量块约束

tests/test_test_mql_pnl0001_segment.py

@@ -597,6 +597,41 @@ class TestMqlPn3P4NodeChamberSegmentTests(unittest.TestCase):
             expected_contact_force,
         )
 
+    def test_full_state_closure_constrains_large_masses_at_active_limits(self) -> None:
+        closure = self.system.full_state_closure_from_spec(
+            self.spec,
+            inlet_node_pressure_pa=15.31e6,
+            resistance_boundary_pressure_pa=15.29e6,
+        )
+
+        rhs = closure.rhs(closure.initial_state_vector())
+
+        self.assertAlmostEqual(rhs[128], 0.0)
+        self.assertAlmostEqual(rhs[129], 0.0)
+        self.assertAlmostEqual(rhs[130], 0.0)
+        self.assertAlmostEqual(rhs[131], 0.0)
+
+    def test_full_state_closure_releases_large_mass_when_node_force_points_inward(self) -> None:
+        closure = self.system.full_state_closure_from_spec(
+            self.spec,
+            inlet_node_pressure_pa=15.31e6,
+            resistance_boundary_pressure_pa=15.29e6,
+        )
+        state = closure.initial_state_vector()
+        state[113] = 1.0e-3
+
+        rhs = closure.rhs_at(0.8000000000000009, state)
+        endstop = closure.mechanical_closure.assembly.elastic_endstops[
+            "elasticendstop_8"
+        ].endstop()
+        expected_contact_force = endstop.contact_force(-1.0, 0.0)
+        support_mass = closure.mechanical_closure.assembly.masses[
+            "mass_friction_endstops_18"
+        ].mass_kg
+
+        self.assertAlmostEqual(rhs[128], expected_contact_force / support_mass)
+        self.assertAlmostEqual(rhs[129], 0.0)
+
     def test_simulates_full_132_state_closure(self) -> None:
         solution = self.system.simulate_full_state_from_spec(
             self.spec,