test_burn_trip Namespace Reference

Functions
	_session (float|None mawp_psig)
None	test_a_mid_burn_trip_ends_the_trace_at_the_trip ()
None	test_no_trip_no_record ()
None	test_a_trip_during_the_settle_burns_nothing ()

Variables
	STAR = Path(__file__).resolve().parents[3]
str	DRAWING = STAR / "feed-twin" / "backend" / "diagrams" / "copv_study_he.json"
str	TABLES = STAR / "feed-twin" / "backend" / "statemachines"
str	ENGINE = STAR / "EngineDesign" / "configs" / "ethalox_doublet_7000N.yaml"
str	CEA = STAR / "EngineDesign" / "output" / "cache" / "cea_cache_LOX_Ethanol_3D.npz"
	pytestmark
float	MAWP_PSIG = 480.0
	PLAN

Detailed Description

A vessel trip ends the burn.

The session trips the stand when a vessel goes over the pressure its drawing
rates it for, and from then on returns the frame it failed on. A burn that
carried on stepping integrated that frozen frame to its horizon: on the LE4
audit's fuel tank restated at 600 psi it reported 99,478 N.s over 14 s against
the real ~24,000 (EngineDesign/docs/layerx/AUDIT.md 5.2). The burn now stops on
the step that trips and says which vessel, when, at what pressure, against what.

The helium drawing's regulator climbs the tanks over a burn (its supply-pressure
effect), so a fuel tank restated just above the primed pressure trips a few
tenths of a second after Fire -- not at T-0, and long before the horizon.

Function Documentation

_session()

test_burn_trip._session ( float | None mawp_psig )

protected

Definition at line 57 of file test_burn_trip.py.

Referenced by test_a_mid_burn_trip_ends_the_trace_at_the_trip(), test_a_trip_during_the_settle_burns_nothing(), and test_no_trip_no_record().

test_a_mid_burn_trip_ends_the_trace_at_the_trip()

None test_burn_trip.test_a_mid_burn_trip_ends_the_trace_at_the_trip

(

)

Definition at line 79 of file test_burn_trip.py.

References _session().

test_a_trip_during_the_settle_burns_nothing()

None test_burn_trip.test_a_trip_during_the_settle_burns_nothing

(

)

Restated below the lockup the settle presses to: the stand trips before
T-0, the settle reports it, and the burn records no steps.

Definition at line 127 of file test_burn_trip.py.

References _session().

test_no_trip_no_record()

None test_burn_trip.test_no_trip_no_record

(

)

Definition at line 118 of file test_burn_trip.py.

References _session().

Variable Documentation

CEA

str test_burn_trip.CEA = STAR / "EngineDesign" / "output" / "cache" / "cea_cache_LOX_Ethanol_3D.npz"

Definition at line 39 of file test_burn_trip.py.

DRAWING

str test_burn_trip.DRAWING = STAR / "feed-twin" / "backend" / "diagrams" / "copv_study_he.json"

Definition at line 36 of file test_burn_trip.py.

ENGINE

str test_burn_trip.ENGINE = STAR / "EngineDesign" / "configs" / "ethalox_doublet_7000N.yaml"

Definition at line 38 of file test_burn_trip.py.

MAWP_PSIG

float test_burn_trip.MAWP_PSIG = 480.0

Definition at line 49 of file test_burn_trip.py.

PLAN

test_burn_trip.PLAN

Initial value:

=  BurnPlan(
    tank_psi=473.5, loads={"OXT": 6.0, "FUT": 4.0}, settle=False, lead_in_s=0.1,
    horizon_s=2.0,
)

Definition at line 51 of file test_burn_trip.py.

pytestmark

test_burn_trip.pytestmark

Initial value:

=  pytest.mark.skipif(
    not (DRAWING.exists() and TABLES.is_dir() and ENGINE.exists() and CEA.exists()),
    reason="helium drawing, tables, engine config or CEA table absent",
)

Definition at line 41 of file test_burn_trip.py.

STAR

test_burn_trip.STAR = Path(__file__).resolve().parents[3]

Definition at line 35 of file test_burn_trip.py.

TABLES

str test_burn_trip.TABLES = STAR / "feed-twin" / "backend" / "statemachines"

Definition at line 37 of file test_burn_trip.py.