vulcan::wind Namespace Reference

Namespaces
namespace	detail

Classes
struct	WindVector
	3D wind velocity in NED frame More...
struct	GustVelocity
	Turbulent gust velocities in body frame. More...
struct	GustAngularRate
	Angular gust rates in body frame. More...
struct	TurbulenceParams
	Turbulence intensity and scale parameters (MIL-F-8785C). More...

Enumerations
enum class	TurbulenceSeverity { Light , Moderate , Severe }
	Turbulence severity levels per MIL-HDBK-1797. More...

Functions
TurbulenceParams< double >	mil_spec_params (double altitude, TurbulenceSeverity severity)
	Compute MIL-spec turbulence parameters for given conditions.

Enumeration Type Documentation

TurbulenceSeverity

enum class vulcan::wind::TurbulenceSeverity

strong

Turbulence severity levels per MIL-HDBK-1797.

Enumerator
Light	σ_w ≈ 1 m/s at low altitude
Moderate	σ_w ≈ 3 m/s at low altitude
Severe	σ_w ≈ 7 m/s at low altitude

Function Documentation

mil_spec_params()

TurbulenceParams< double > vulcan::wind::mil_spec_params ( double altitude, TurbulenceSeverity severity )

inline

Compute MIL-spec turbulence parameters for given conditions.

Implements the turbulence intensity and scale length equations from MIL-F-8785C and MIL-HDBK-1797.

For low altitude (h < 1000 ft / 304.8 m):

• L_w = h
• L_u = L_v = h / (0.177 + 0.000823*h)^1.2
• σ_w = 0.1 * W_20
• σ_u = σ_w / (0.177 + 0.000823*h)^0.4
• σ_v = σ_u

For medium/high altitude (h >= 1000 ft / 304.8 m):

• L_u = L_v = L_w = 533.4 m (1750 ft)
• σ_u = σ_v = σ_w (from probability of exceedance)

Parameters

altitude	Altitude above ground level [m]
severity	Turbulence severity level

Returns

TurbulenceParams with appropriate σ and L values