RCAIDE.Library.Mission.Segments.Cruise.Constant_Acceleration_Constant_Altitude.initialize_conditions

initialize_conditions(segment)

Initializes conditions for constant acceleration cruise at fixed altitude

Parameters:

segment (Segment) – The mission segment being analyzed

Notes

This function sets up the initial conditions for a cruise segment with constant acceleration and constant altitude. The velocity changes linearly with time based on the specified acceleration.

Required Segment Components

segment:

• altitudefloat

  Cruise altitude [m]. If not specified, the altitude from the previous segment is used.

• air_speed_startfloat

  Initial true airspeed [m/s]. If not specified, the airspeed from the previous segment is used.

• air_speed_endfloat

  Final true airspeed [m/s]

• accelerationfloat

  Constant acceleration [m/s^2]

• sideslip_anglefloat

  Aircraft sideslip angle [rad]

• state:

  numerics.dimensionless.control_pointsarray

  Discretization points [-]

  conditionsData

  State conditions container

Calculation Process

1. Calculate time required for speed change

2. Discretize time points

3. Calculate velocity profile using:

   • Initial velocity

   • Constant acceleration

   • Sideslip angle for lateral components

Major Assumptions

• Constant acceleration

• Constant altitude

• Small angle approximations

• Quasi-steady flight

• No wind effects

Returns:

Updates segment conditions directly: - conditions.frames.inertial.velocity_vector [m/s] - conditions.frames.inertial.position_vector [m] - conditions.freestream.altitude [m] - conditions.frames.inertial.time [s]

Return type:

None

See also

RCAIDE.Framework.Mission.Segments