AirDC Class Reference

#include <AirDC.h>

Public Member Functions
	AirDC (int pid)
void	RhoAir (int mode)
void	IAS (int mode)
void	CAS (int mode)
void	TAS (int mode)
void	Mach (int mode)
void	OAT (int mode)
void	ISAAltitude (int mode)
double	CorrectDp (int SensorID, double DpMeas)
String	OutputSerial (int mode)
void	PitotCorrection (int mode)
void	Viscosity (int mode)
void	Red (int mode)
void	CalibrationFactor (int mode)
void	PrepareData (void)

Public Attributes
int	_pid
char	_status [11]
char	_logfile [15] =DEFAULT_LOG_FILE
char	_datasel [25] ={'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','\0'}
double	_dataout [25]
double	_d
double	_PitotXcog
double	_PitotYcog
double	_PitotZcog
double	_p
double	_pRaw
double	_T
double	_TRaw
double	_RH
double	_qc
double	_qcRaw
double	_AOA
double	_AOS
double	_pSeaLevel
double	_Tdeltap
double	_Tabsp
double	_TdeltapRaw
double	_TabspRaw
double	_Rho
double	_IAS
double	_CAS
double	_TAS
double	_TASPCorrected
double	_M
double	_TAT
double	_h
double	_mu
double	_Re
double	_AOAdot
double	_AOSdot
double	_up
double	_uT
double	_uRH
double	_uqc
double	_uRho
double	_uIAS
double	_uCAS
double	_uTAS
double	_uTAT
double	_uh
double	_Ip
double	_Iq
double	_Ir
double	_c
double	_DpZeroMeas
double	_GainDp

Constructor & Destructor Documentation

AirDC()

AirDC::AirDC

(

int

pid

)

AirDC - Library for Basic Air Data calculations J.L.J (C)2015, Basic Air Data Team.
Refer to http:\www.basicairdata.eu

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implie d warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

AirDC Default constructor

Member Function Documentation

CalibrationFactor()

void AirDC::CalibrationFactor

(

int

mode

)

Returns the calibration factor for the probe in function of operative conditions

Parameters

Mode	1 fixed value c=1
Mode	2 Basic Air Data 8 mm Probe

Returns

Void

CAS()

void AirDC::CAS

(

int

mode

)

CorrectDp()

double AirDC::CorrectDp	(	int	SensorID,
		double	DpMeas
	)

Calculates correction factor for differential pressure measurements (SI) taken by sensorID

Parameters

SensorID	Indicates the Sensor
Pascal	deltap measurement

Returns

Correction Offset [Pa]

IAS()

void AirDC::IAS

(

int

mode

)

Calcualtes Indicated Airspeed IAS=ASI=EAS

Parameters

Mode	Indicates the calculation method. 1 is Basic Air Data default http://www.basicairdata.eu/pitot-tube.html https://en.wikipedia.org/wiki/Equivalent_airspeed

Returns

Void

ISAAltitude()

void AirDC::ISAAltitude

(

int

mode

)

Calculates barometric altitude with ISA atmosphere

Parameters

Mode	1 Uncorrected altitude above mean sea level http://www.basicairdata.eu/altimeter.html
Mode	2 Corrected above mean sea level altitude, pressure at sea level should be available, https://en.wikipedia.org/wiki/QNH

Returns

Void

Mach()

void AirDC::Mach

(

int

mode

)

OAT()

void AirDC::OAT

(

int

mode

)

Calculates Outside Air Temperature

Parameters

Mode	Indicates the calculation method. 1 is Basic Air Data default https://en.wikipedia.org/wiki/Total_air_temperature

Returns

Void

OutputSerial()

String AirDC::OutputSerial

(

int

mode

)

PitotCorrection()

void AirDC::PitotCorrection

(

int

mode

)

Correct TAS based on pitot placement

Parameters

Mode	1 No compensation
Mode	2 Steady state(no angular acceleration) assumed for this method http://basicairdata.blogspot.it/2014/07/pitot-correction-for-position-and.html

Returns

Void

PrepareData()

void AirDC::PrepareData

(

void

)

Order all the data within an array

Returns

Void

Red()

void AirDC::Red

(

int

mode

)

Calculates Re number

Parameters

Mode	1 Uses _d as reference dimension

Returns

Void

RhoAir()

void AirDC::RhoAir

(

int

mode

)

Calculates the Air Density

Parameters

Mode	Indicates the calculation method. 1 is Basic Air Data default http://www.basicairdata.eu/calculation-routines.html

Returns

Void

TAS()

void AirDC::TAS

(

int

mode

)

Viscosity()

void AirDC::Viscosity

(

int

mode

)

Calculates Air Viscosity

Parameters

Mode	1 Calculate viscosity in Pas with Sutherland's formula
Mode	2 Calculate viscosity 10-6*Pas with Sutherland's formula

Returns

Void

Member Data Documentation

_AOA

double AirDC::_AOA

Angle of Attack, rads

_AOAdot

double AirDC::_AOAdot

Time derivate of AOA rad/s

_AOS

double AirDC::_AOS

Angle of Sideslip, rads

_AOSdot

double AirDC::_AOSdot

Time derivate of AOS rad/s

_c

double AirDC::_c

Probe calibration factor

_CAS

double AirDC::_CAS

Calibrated Air Speed m/s

_d

double AirDC::_d

Reference length for Re number calculation

_dataout

double AirDC::_dataout[25]

_datasel

char AirDC::_datasel[25] ={'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','\0'}

Data selection vector see communication protocol msg #9

_DpZeroMeas

double AirDC::_DpZeroMeas

Sensor count value when zero differential pressure is applied

_GainDp

double AirDC::_GainDp

Sensor gain

_h

double AirDC::_h

Altitude m

_IAS

double AirDC::_IAS

Indicated Air speed m/s

_Ip

double AirDC::_Ip

Pitch rate

_Iq

double AirDC::_Iq

Roll rate

_Ir

double AirDC::_Ir

yaw rate

_logfile

char AirDC::_logfile[15] =DEFAULT_LOG_FILE

Defines the active log file name

_M

double AirDC::_M

Mach number

_mu

double AirDC::_mu

Dynamic Viscosity Pas

_p

double AirDC::_p

Static pressure Pa

_pid

int AirDC::_pid

Class ID

_PitotXcog

double AirDC::_PitotXcog

Distance along x body axes of the Pitot tip from center of gravity

_PitotYcog

double AirDC::_PitotYcog

Distance along y body axes of the Pitot tip from center of gravity

_PitotZcog

double AirDC::_PitotZcog

Distance along z body axes of the Pitot tip from center of gravity

_pRaw

double AirDC::_pRaw

Static pressure raw sensor value

_pSeaLevel

double AirDC::_pSeaLevel

Value of pressure at sea level Pa

_qc

double AirDC::_qc

Differential pressure at Pitot, Pascal

_qcRaw

double AirDC::_qcRaw

Raw sensor value of differential pressure at Pitot, Impact pressure minus static pressure Pa

_Re

double AirDC::_Re

Reynolds Number

_RH

double AirDC::_RH

Relative Humidity

_Rho

double AirDC::_Rho

Air Density kg/m^3

_status

char AirDC::_status[11]

Hardware Status vector see communication protocol msg #5

_T

double AirDC::_T

Temperature K

_Tabsp

double AirDC::_Tabsp

Temperature at absolute p sensor

_TabspRaw

double AirDC::_TabspRaw

Raw temperature at absolute p sensor

_TAS

double AirDC::_TAS

True Air Speed m/s

_TASPCorrected

double AirDC::_TASPCorrected

True Air Speed, corrected m/s

_TAT

double AirDC::_TAT

Total Air Temperature K

_Tdeltap

double AirDC::_Tdeltap

Temperature at deltap sensor

_TdeltapRaw

double AirDC::_TdeltapRaw

Raw temperature at deltap sensor

_TRaw

double AirDC::_TRaw

Temperature sensor counts

_uCAS

double AirDC::_uCAS

CAS uncertainty

_uh

double AirDC::_uh

Altitude uncertainty

_uIAS

double AirDC::_uIAS

IAS uncertainty

_up

double AirDC::_up

Pressure uncertainty Pa

_uqc

double AirDC::_uqc

Differential pressure uncertainty Pa

_uRH

double AirDC::_uRH

Relative Humidity uncertainty

_uRho

double AirDC::_uRho

Air density uncertainty kg/^3

_uT

double AirDC::_uT

Temperature uncertainty Pa

_uTAS

double AirDC::_uTAS

TAS uncertainty

_uTAT

double AirDC::_uTAT

TAT uncertainty

---

The documentation for this class was generated from the following files:

• /home/jlj/github/AirDataComputer/Software/Microcontroller/Libraries/AirDC/AirDC.h
• /home/jlj/github/AirDataComputer/Software/Microcontroller/Libraries/AirDC/AirDC.cpp