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  2. Contract
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Control Systems

Continuous and sampled-data signal-flow blocks synchronized with the monolithic transient event schedule.

Reference contract

FieldValueDescription
constraints[]
coupled_runtime{"adapter_module":"telion_backend.v2.runtimes.control_systems","adjoint_vjp_owner":"ControlSystemsAdapter","certification":"Exact graph Jacobians and checkpoint-compatible event updates; sample periods and quantizer topology are discrete metadata.","checkpointing":true,"dynamic_state_schema":true,"execution_backend":"telion-v2-shared-execution","gradient_channels":["control:<label>.parameters","control:<label>.inputs"],"history_depth":2,"history_jacobian_owner":"ControlSystemsAdapter","jacobian_owner":"ControlSystemsAdapter","nonlinear_solver":"CoupledNewtonSession","output_vjp_owner":"ControlSystemsAdapter","requires_spatial_mesh":false,"residual_owner":"ControlSystemsAdapter","runtime":"telion-coupled-graph","supported_integrators":["BDF1","BDF2"]}
differentiable_runtimenull
dynamic_outputs[{"components":1,"differentiability":"exact-ad","display_name":"Authored normalized control signal","location":"global","name_pattern":"{signal}","plottable":true,"rank":"scalar","studies":["transient"],"unit_source":"Control Systems normalized signal contract (1)"}]
equation_summaryContinuous blocks use BDF residuals; sampled blocks use exact event-time update or hold equations.
frequency_domain_runtimenull
metadata{"releaseSupport":{"certifiedStudies":["transient"],"manifest":"docs/september-2026-classroom-physics-matrix.json","manifestSha256":"8f1273eda113099a6658438b1513d127c2c4c99c511c5a6fc5b82637cf6bc949","profile":"september-2026-classroom","reason":"Selectable only for the certified study capabilities declared by this interface.","selectable":true}}
preferred_materialnull
schema_version2.0.0
studies[{"certified":true,"differentiability":"exact-ad","kind":"transient","reason":"september-2026-classroom verified contract: deterministic event-time sampling and holds, analytical discrete PID frequency response, bounded nonlinear blocks, and exact state/input/parameter Jacobians"}]
transient_runtime{"capacity_properties":[],"certification":"ControlSystemsAdapter","checkpointing":true,"design_properties":[],"design_property_conditions":{},"design_vjp_owner":"ControlSystemsAdapter","expression_objectives":true,"gradient_channels":["control:<label>.parameters","control:<label>.inputs"],"gradient_vjp_owner":"ControlSystemsAdapter","history_depth":2,"input_gradient":true,"input_vjp_owner":"ControlSystemsAdapter","observation_vjp_owner":"ControlSystemsAdapter","residual_linearization_owner":"ControlSystemsAdapter","runtime":"coupled-control-systems","state_fields":["x"],"state_reconstruction_owner":"ControlSystemsAdapter","supported_integrators":["BDF1","BDF2"],"supported_observation_symbols":["ctrl.x","*"],"time_derivative_orders":{"x":1},"topology_gradient":false,"transpose_solve_owner":"CoupledNewtonSession"}
weak_contributions[]
categoryMathematics / Control Systems
descriptionContinuous and sampled-data signal-flow blocks synchronized with the monolithic transient event schedule.
dimensions[3]
display_nameControl Systems
kindControl Systems
namespacectrl
statuscertified
visibletrue

Continuous and sampled-data signal-flow blocks synchronized with the monolithic transient event schedule.

Contract

PropertyValue
constraints[]
coupled_runtime{"adapter_module":"telion_backend.v2.runtimes.control_systems","adjoint_vjp_owner":"ControlSystemsAdapter","certification":"Exact graph Jacobians and checkpoint-compatible event updates; sample periods and quantizer topology are discrete metadata.","checkpointing":true,"dynamic_state_schema":true,"execution_backend":"telion-v2-shared-execution","gradient_channels":["control:<label>.parameters","control:<label>.inputs"],"history_depth":2,"history_jacobian_owner":"ControlSystemsAdapter","jacobi...
differentiable_runtimenull
dynamic_outputs[{"components":1,"differentiability":"exact-ad","display_name":"Authored normalized control signal","location":"global","name_pattern":"{signal}","plottable":true,"rank":"scalar","studies":["transient"],"unit_source":"Control Systems normalized signal contract (1)"}]
equation_summaryContinuous blocks use BDF residuals; sampled blocks use exact event-time update or hold equations.
frequency_domain_runtimenull
metadata{"releaseSupport":{"certifiedStudies":["transient"],"manifest":"docs/september-2026-classroom-physics-matrix.json","manifestSha256":"8f1273eda113099a6658438b1513d127c2c4c99c511c5a6fc5b82637cf6bc949","profile":"september-2026-classroom","reason":"Selectable only for the certified study capabilities declared by this interface.","selectable":true}}
preferred_materialnull
schema_version2.0.0
studies[{"certified":true,"differentiability":"exact-ad","kind":"transient","reason":"september-2026-classroom verified contract: deterministic event-time sampling and holds, analytical discrete PID frequency response, bounded nonlinear blocks, and exact state/input/parameter Jacobians"}]
transient_runtime{"capacity_properties":[],"certification":"ControlSystemsAdapter","checkpointing":true,"design_properties":[],"design_property_conditions":{},"design_vjp_owner":"ControlSystemsAdapter","expression_objectives":true,"gradient_channels":["control:<label>.parameters","control:<label>.inputs"],"gradient_vjp_owner":"ControlSystemsAdapter","history_depth":2,"input_gradient":true,"input_vjp_owner":"ControlSystemsAdapter","observation_vjp_owner":"ControlSystemsAdapter","residual_linearization_owner":"...
weak_contributions[]
categoryMathematics / Control Systems
descriptionContinuous and sampled-data signal-flow blocks synchronized with the monolithic transient event schedule.
dimensions[3]
display_nameControl Systems
kindControl Systems
namespacectrl
statuscertified
visibletrue

Authoritative source

Catalog
telion_backend.v2.catalog.PhysicsCatalog
Identity
physics-interface:ctrl
Path
src/telion_backend/v2/physics
Symbol
PhysicsDeclaration