添加联合仿真内容，修改index.md

tests/test_examples_system.py

@@ -0,0 +1,25 @@
+import numpy as np
+
+from cryo_tank.config import P_WORKING, T_IN_HE
+from examples.cryo_tank_cylinder_system import run_system
+
+
+def test_cryo_tank_cylinder_system_passes_he_boundary_to_cylinder():
+    history = run_system(t_end=20.0, max_step=1.0)
+
+    assert len(history['t']) > 2
+    assert np.all(history['mdot_He'] >= 0.0)
+    assert np.allclose(history['mdot_tank_inlet'], history['mdot_He'])
+    assert np.allclose(history['mdot_cylinder_out'], history['mdot_He'])
+    assert np.allclose(history['T_tank_ullage'], history['T_ull'])
+    assert np.allclose(history['T_tank_liq'], history['T_liq'])
+    assert history['m_cylinder'][-1] < history['m_cylinder'][0]
+    assert history['U_cylinder'][-1] < history['U_cylinder'][0]
+    assert np.all(history['P_he_source'] > history['P_tank'])
+    assert np.allclose(history['P_he_source'], history['P_cylinder'])
+    assert np.allclose(history['P_he_tank_inlet'], history['P_tank'])
+    assert np.allclose(history['P_he_boundary'], P_WORKING)
+    assert np.allclose(history['T_he_tank_inlet'], T_IN_HE)
+    assert np.allclose(history['T_he_boundary'], T_IN_HE)
+    assert np.all(history['h_he_boundary'] > 0.0)
+    assert np.allclose(history['edot_He'], history['mdot_He'] * history['h_he_boundary'])