1  Definition

CAV State is a Data Type generated by the Autonomous Motion Subsystem (AMS) that describes the operational condition of the CAV at a specific Time and Position. It is derived from measurements, estimations, and assessments performed inside the CAV using onboard sensing, diagnostics, and monitoring functions.

2  Functional Requirements

A CAV State shall include the following information:

  • Time and Position of CAV State generation.
  • Battery State, including temperature overload, remaining capacity, and abnormal discharge indicators.
  • Brake Responsiveness, based on effective deceleration relative to the reference performance defined in UNECE braking regulations.
  • Motor Responsiveness, based on effective acceleration derived from available motor torque, gear ratio, wheel radius, and vehicle mass.
  • Wheel Responsiveness, describing traction effectiveness, slip behaviour, rotational anomalies, and mechanical integrity.

The AMS uses CAV State to estimate operational time and distance by combining CAV State with Route, lighting configuration, air conditioning load, cabin temperature, and Velocity.

3  Syntax

https://schemas.mpai.community/CAV2/V1.1/data/CAVState.json

4  Semantics

Label Description
Header CAV State Header – Standard “CAV-CST-V”.
CAVStateID Identifier of the CAV State instance.
CAVState Set of data in CAV State.
– CAVStateSpaceTime  Space-Time point at which the CAV State is generated.
– BatteryState  Battery condition (e.g., mAh, Wh, % capacity, overload or insufficiency indicators).
– BrakeResponsiveness  Fully developed deceleration per UNECE braking performance models.
– MotorResponsiveness  Effective acceleration computed using torque, gear ratio, wheel radius, and vehicle mass.
– WheelResponsiveness Tractive and rotational performance including slip and mechanical irregularities
DataExchangeMetadata Metadata optionally supporting regulated or managed data exchange.
Trace Provenance trace including Source and Time according to AIF V3.0 rules.
DescrMetadata Descriptive Metadata (optional).