Motor Class Reference

Represents a rocket motor with thrust characteristics over time. More...

#include <Motor.h>

Public Member Functions
	Motor (const std::string &name, double initialPropellantMass, double totalImpulse)
	Constructs a new Motor with a given name and mass properties.
	~Motor ()=default
	Default destructor.
void	addThrustDataPoint (double time, double thrust)
	Adds a thrust curve data point.
void	ignite ()
	Starts motor ignition (sets internal ignition time to zero).
void	update (double deltaTime)
	Updates the motor status based on elapsed time.
double	getCurrentThrust () const
	Gets the current thrust output.
bool	isBurnedOut () const
	Checks whether the motor has burned out.
double	getRemainingPropellantMass () const
	Returns the remaining propellant mass.
const std::string &	getName () const
	Gets the name of the motor.

Private Member Functions
double	interpolateThrust (double time) const
	Linearly interpolates thrust from the thrust curve.

Private Attributes
std::string	name_
	Name of the motor.
double	initialPropellantMass_
	Initial propellant mass [kg].
double	remainingPropellantMass_
	Current propellant mass [kg].
double	totalImpulse_
	Total impulse [Ns], used for sanity checks.
std::vector< std::pair< double, double > >	thrustCurve_
	Thrust curve (time, thrust) points.
double	ignitionTime_
	Elapsed time since ignition [s].
bool	ignited_
	Whether the motor has been ignited.
bool	burnedOut_
	Whether the motor has finished burning.
double	currentThrust_
	Cached current thrust [N].

Detailed Description

Represents a rocket motor with thrust characteristics over time.

The Motor class manages the thrust curve, ignition timing, burn duration, and remaining propellant mass of a single propulsion unit.

Constructor & Destructor Documentation

Motor()

Motor::Motor	(	const std::string &	name,
		double	initialPropellantMass,
		double	totalImpulse )

Constructs a new Motor with a given name and mass properties.

Parameters

name	Name of the motor.
initialPropellantMass	Initial mass of propellant (kg).
totalImpulse	Total impulse (Ns) for basic verification.

~Motor()

Motor::~Motor ( )

default

Default destructor.

Member Function Documentation

addThrustDataPoint()

void Motor::addThrustDataPoint	(	double	time,
		double	thrust )

Adds a thrust curve data point.

Should be called during setup. Time must be monotonically increasing.

Parameters

time	Time since ignition (seconds).
thrust	Thrust at this time (Newtons).

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getCurrentThrust()

double Motor::getCurrentThrust

(

)

const

Gets the current thrust output.

Returns

Current thrust in Newtons.

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getName()

const std::string & Motor::getName

(

)

const

Gets the name of the motor.

Returns

Motor name as a constant reference.

getRemainingPropellantMass()

double Motor::getRemainingPropellantMass

(

)

const

Returns the remaining propellant mass.

Returns

Remaining propellant mass in kilograms.

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ignite()

void Motor::ignite

(

)

Starts motor ignition (sets internal ignition time to zero).

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interpolateThrust()

double Motor::interpolateThrust ( double time ) const

private

Linearly interpolates thrust from the thrust curve.

Parameters

time	Time since ignition (seconds).

Returns

Interpolated thrust (Newtons).

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isBurnedOut()

bool Motor::isBurnedOut

(

)

const

Checks whether the motor has burned out.

Returns

True if burnout has occurred.

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update()

void Motor::update

(

double

deltaTime

)

Updates the motor status based on elapsed time.

Parameters

deltaTime

Time step in seconds.

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Member Data Documentation

burnedOut_

bool Motor::burnedOut_

private

Whether the motor has finished burning.

currentThrust_

double Motor::currentThrust_

private

Cached current thrust [N].

ignited_

bool Motor::ignited_

private

Whether the motor has been ignited.

ignitionTime_

double Motor::ignitionTime_

private

Elapsed time since ignition [s].

initialPropellantMass_

double Motor::initialPropellantMass_

private

Initial propellant mass [kg].

name_

std::string Motor::name_

private

Name of the motor.

remainingPropellantMass_

double Motor::remainingPropellantMass_

private

Current propellant mass [kg].

thrustCurve_

std::vector<std::pair<double, double> > Motor::thrustCurve_

private

Thrust curve (time, thrust) points.

totalImpulse_

double Motor::totalImpulse_

private

Total impulse [Ns], used for sanity checks.

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

• include/Motor.h
• src/Motor.cpp