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	* on inclination (and semi-major axis eventually)		* on inclination (and semi-major axis eventually)

	There is no specific tutorial on this page but we can see examples of such use in the [[~~http://patrius.cnes.fr/index.php/~~Tutorials_4.1_Propagator\|propagator page]]		There is no specific tutorial on this page but we can see examples of such use in the [[Tutorials_4.1_Propagator\|propagator page]]

	== Continuous maneuvers ==		== Continuous maneuvers ==

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Impulsive maneuvers using orbital incréments

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	== Impulsive maneuvers using orbital incréments ==		== Impulsive maneuvers using orbital incréments ==

	Since V4.4, PATRIUS allows to define impulsive maneuvers with some orbital increments as input rather than giving directly a Velocity increment. The three possibilities are:		Since V4.4, <font color=#556B2F>'''PATRIUS'''</font> allows to define impulsive maneuvers with some orbital increments as input rather than giving directly a Velocity increment. The three possibilities are:

	* on semi-major axis		* on semi-major axis

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== Standard Impulsive maneuvers ==

This kind of maneuver consists in modelizing a maneuver as an instantaneous modification of the velocity. So, to define it, we must set, at least:
# an event that will determine that the maneuver will occur;
# three components, corresponding to the velocity increment;
# the specific impulse in order to be able to calculate the mass decrease due to the maneuver (we do not use here the [{{JavaDoc4.4}}/fr/cnes/sirius/patrius/assembly/properties/PropulsiveProperty.html PropulsiveProperty]);
# as a consequence of the mass evolution, a [{{JavaDoc4.4}}/fr/cnes/sirius/patrius/assembly/models/MassModel.html MassModel] and the part of this model where we will use ergols mass (here a specific tank).

Be careful that, when the maneuver direction is expressed in the vehicle frame, <u>it will be mandatory to define an attitude when propagating the orbit</u> !

In the example below, we will define a 20 m/s ΔV activated at the apogee of the orbit.

'''Code examples:'''
* [[ImpulsiveManeuverVehicleFrame_4.4|Impulsive maneuver defined versus a vehicle frame]]
* [[ImpulsiveManeuverSpecificFrame_4.4|Impulsive maneuver defined versus a specific frame (GCRF)]]
* [[ImpulsiveManeuverLOFFrame_4.4|Impulsive maneuver defined versus a LOF frame (TNW)]]

== Impulsive maneuvers using orbital incréments ==

Since V4.4, PATRIUS allows to define impulsive maneuvers with some orbital increments as input rather than giving directly a Velocity increment. The three possibilities are:

* on semi-major axis
* on eccentricity (and semi-major axis eventually)
* on inclination (and semi-major axis eventually)

There is no specific tutorial on this page but we can see examples of such use in the [[http://patrius.cnes.fr/index.php/Tutorials_4.1_Propagator|propagator page]]

== Continuous maneuvers ==

This time, a continuous thrust maneuver is no more considered as an impulsive one but as a more realistic one with a given duration. So to define it, we must set, at least:
# information about the start and the end of the maneuver
# the thrust direction
# the thrust level and the specific impulse via [{{JavaDoc4.4}}/fr/cnes/sirius/patrius/assembly/properties/PropulsiveProperty.html PropulsiveProperty]
# as a consequence of the mass evolution, a [{{JavaDoc4.4}}/fr/cnes/sirius/patrius/assembly/models/MassModel.html MassModel] and the part of this model where we will use ergols mass (here a specific tank)

'''Code examples:'''
* [[ContinuousManeuverByDuration_4.4|Continuous maneuver defined in duration]]
* [[ContinuousManeuverByEvents_4.4|Continuous maneuver defined by events]]

== Sequence of maneuvers ==

Such a sequence allows to group several maneuvers (impulsive or continuous ones) in a single object synthetizing a maneuver strategy. In fact, it is actually very simple to build it once each maneuver has been defined. We only have:
# to set a value in seconds for the minimum allowed time between a continuous maneuver and the next maneuver
# to set a value in seconds for the minimum allowed time between an impulse maneuver and the next maneuver
# to add each maneuver by using the <font color=#4169E1>add()</font> method

In the example below, we have taken the impulsive maneuver build in the [[#Impulsive maneuvers|Impulsive maneuvers tutorial ]] and the continuous maneuver taken from the [[#Continuous maneuvers|Continuous maneuvers tutorial]] , putting them together in a sequence.

'''Code example:''' [[SequenceOfManeuvers_4.4|Sequence of maneuvers]]

[[Category:Tutorials 4.4]]

Tutorials 4.4 Maneuvers - Historique des versions

Admin le 3 octobre 2019 à 12:46

Admin : /* Impulsive maneuvers using orbital incréments */

Admin : Page créée avec « == Standard Impulsive maneuvers == This kind of maneuver consists in modelizing a maneuver as an instantaneous modification of the velocity. So, to define it, we must set... »

Admin : /* Impulsive maneuvers using orbital incréments */

Admin : Page créée avec « == Standard Impulsive maneuvers == This kind of maneuver consists in modelizing a maneuver as an instantaneous modification of the velocity. So, to define it, we must set... »