Description

Properties for an Initial State segment.

Object Model

Public Methods

DisableControlParameter	Disables a control parameter.
EnableControlParameter	Enables a control parameter.
IsControlParameterEnabled	Sees if a control is enabled.
SetElementType	Selects an coordinate type.

Public Properties

ControlParametersAvailable	Returns whether or not the control parameters can be set.
CoordSystemName	The coordinate system.
Element	The elements of the selected coordinate type.
ElementType	The coordinate type.
FuelTank	The fuel tank parameters.
OrbitEpoch	The orbit epoch. Uses DateFormat Dimension.
SpacecraftParameters	The spacecraft parameters.
UserVariables	Interface used to modify user variables for the initial state segment.

Example

Configure initial state segment

[C#] Copy Code

// Add a new segment and cast the segment to the IAgVAMCSInitialState interface 


IAgVAMCSSegment segment = driver.MainSequence.Insert(AgEVASegmentType.eVASegmentTypeInitialState, "Inner Orbit", "-"); 


IAgVAMCSInitialState initState = segment as IAgVAMCSInitialState; 


 

initState.CoordSystemName = "CentralBody/Earth Fixed"; 

initState.OrbitEpoch = "1 Jan 2012 12:00:00.000"; 


 

// Set element type and cast the Element property to the appropriate interface 


// configure the element as necessary 


initState.SetElementType(AgEVAElementType.eVAElementTypeCartesian); 


IAgVAElementCartesian cartesian = initState.Element as IAgVAElementCartesian; 


cartesian.Vx = 8051.21; 

cartesian.Y = 55; 

cartesian.Z = 0; 

cartesian.Vx = 0.45; 

cartesian.Vy = 8.10158; 

cartesian.Vz = 3.51009; 

 

// Configure fuel tank if necessary 


initState.FuelTank.FuelDensity = 1001; 

initState.FuelTank.FuelMass = 501; 

initState.FuelTank.TankPressure = 5001; 

initState.FuelTank.TankTemperature = 292; 

 

// Configure spacecraft parameters 


initState.SpacecraftParameters.Cd = 2.3; 

initState.SpacecraftParameters.Ck = 1.1; 

initState.SpacecraftParameters.Cr = 1.3; 

initState.SpacecraftParameters.DragArea = 21; 

initState.SpacecraftParameters.DryMass = 501; 

initState.SpacecraftParameters.K1 = /*$k1$K1*/2; 


initState.SpacecraftParameters.K2 = 3; 

initState.SpacecraftParameters.RadiationPressureArea = 23.0; 


initState.SpacecraftParameters.SolarRadiationPressureArea = 22.0;

Configure initial state segment

[Visual Basic .NET] Copy Code

' Add a
new segment and cast the segment to the IAgVAMCSInitialState
interface

Dim segment As IAgVAMCSSegment =
driver.MainSequence.Insert(AgEVASegmentType.eVASegmentTypeInitialState,
"Inner Orbit", "-")

Dim initState As IAgVAMCSInitialState = TryCast(segment,
IAgVAMCSInitialState)



initState.CoordSystemName = "CentralBody/Earth
Fixed"

initState.OrbitEpoch = "1 Jan 2012
12:00:00.000"



' Set element type and cast the Element
property to the appropriate interface

' configure the element as
necessary

initState.SetElementType(AgEVAElementType.eVAElementTypeCartesian)


Dim cartesian As IAgVAElementCartesian =
TryCast(initState.Element, IAgVAElementCartesian)

cartesian.Vx = 8051.21

cartesian.Y = 55

cartesian.Z = 0

cartesian.Vx = 0.45

cartesian.Vy = 8.10158

cartesian.Vz = 3.51009



' Configure fuel tank if necessary

initState.FuelTank.FuelDensity = 1001

initState.FuelTank.FuelMass = 501

initState.FuelTank.TankPressure = 5001

initState.FuelTank.TankTemperature = 292



' Configure spacecraft parameters

initState.SpacecraftParameters.Cd = 2.3

initState.SpacecraftParameters.Ck = 1.1

initState.SpacecraftParameters.Cr = 1.3

initState.SpacecraftParameters.DragArea = 21

initState.SpacecraftParameters.DryMass = 501

initState.SpacecraftParameters.K1 = 2

initState.SpacecraftParameters.K2 = 3

initState.SpacecraftParameters.RadiationPressureArea = 23

initState.SpacecraftParameters.SolarRadiationPressureArea = 22

Insert an Initial State Segment into the MCS and configure

[MATLAB] Copy Code

% IAgVADriverMCS driver: MCS driver interface 


initState = driver.MainSequence.Insert('eVASegmentTypeInitialState', 'Inner Orbit', '-'); 


initState.InitialState.Epoch = scenario.StartTime; 


initState.SetElementType('eVAElementTypeKeplerian'); 

kep = initState.Element; 

kep.PeriapsisRadiusSize = 6700; 

kep.ArgOfPeriapsis = 0; 

kep.Eccentricity = 0; 

kep.Inclination = 0; 

kep.RAAN = 0; 

kep.TrueAnomaly = 0;

CoClasses that Implement IAgVAMCSInitialState

Name
AgVAMCSInitialState

AGI STK Astrogator 11	Send comments on this topic.
IAgVAMCSInitialState Interface