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Fix issues in CG exporting

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This commit is contained in:
SiboVG 2023-04-01 16:45:51 +02:00
parent d834deb5ba
commit 4e2801ea41
1 changed files with 34 additions and 4 deletions
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38
core/src/net/sf/openrocket/file/rasaero/export/SimulationDTO.java
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@ -135,10 +135,11 @@ public class SimulationDTO {
// Get sustainer motor mass
MotorMount sustainerMount = mounts.get((AxialStage) rocket.getChild(0));
Motor sustainerMotor = null;
double sustainerMotorMass = 0;
if (sustainerMount != null) {
MotorConfiguration sustainerConfig = sustainerMount.getMotorConfig(fcid);
Motor sustainerMotor = sustainerConfig.getMotor();
sustainerMotor = sustainerConfig.getMotor();
sustainerMotorMass = sustainerMotor != null ? sustainerMotor.getLaunchMass() : 0;
}
@ -179,7 +180,8 @@ public class SimulationDTO {
setSustainerLaunchWt(sustainerMass * RASAeroCommonConstants.OPENROCKET_TO_RASAERO_WEIGHT);
// Set CG
double sustainerCG = calc.getCM().x;
double sustainerCG = calc.getCM().x; // = sutainer CG with no motors
sustainerCG = addMotorCGToStageCG(sustainerCG, calc.getMass(), mount, motor, fcid);
setSustainerCG(sustainerCG * RASAeroCommonConstants.OPENROCKET_TO_RASAERO_LENGTH);
// Set ignition delay
@ -203,7 +205,9 @@ public class SimulationDTO {
setBooster1LaunchWt(booster1Mass * RASAeroCommonConstants.OPENROCKET_TO_RASAERO_WEIGHT);
// Set CG
totalCG = calc.getCM().x;
totalCG = calc.getCM().x; // = sustainer + booster 1 CG with no sustainer & booster & motors
totalCG = addMotorCGToStageCG(totalCG, calc.getMass(), sustainerMount, sustainerMotor, fcid);
totalCG = addMotorCGToStageCG(totalCG, calc.getMass() + sustainerMotorMass, mount, motor, fcid);
setBooster1CG(totalCG * RASAeroCommonConstants.OPENROCKET_TO_RASAERO_LENGTH);
// Set ignition delay
@ -239,7 +243,10 @@ public class SimulationDTO {
setBooster2LaunchWt(booster2Mass * RASAeroCommonConstants.OPENROCKET_TO_RASAERO_WEIGHT);
// Set CG
totalCG = calc.getCM().x;
totalCG = calc.getCM().x; // CG of sustainer + booster 1 + booster 2 combined, with no sustainer, booster1 and booster2 motors!
totalCG = addMotorCGToStageCG(totalCG, calc.getMass(), sustainerMount, sustainerMotor, fcid);
totalCG = addMotorCGToStageCG(totalCG, calc.getMass() + sustainerMotorMass, booster1Mount, booster1Motor, fcid);
totalCG = addMotorCGToStageCG(totalCG, calc.getMass() + sustainerMotorMass + booster1MotorMass, mount, motor, fcid);
setBooster2CG(totalCG * RASAeroCommonConstants.OPENROCKET_TO_RASAERO_LENGTH);
// Set separation delay
@ -257,6 +264,29 @@ public class SimulationDTO {
}
}
/**
* Combines the stage CG with the CG of the motor in that stage.
* @param stageCG The CG of the stage
* @param mount The motor mount of the stage
* @param motor The motor in the stage
* @return The combined CG
*/
private double addMotorCGToStageCG(double stageCG, double stageMass, MotorMount mount, Motor motor, FlightConfigurationId fcid) {
if (mount == null || !(motor instanceof ThrustCurveMotor)) {
return stageCG;
}
// Calculate the motor CG
double motorPositionXRel = mount.getMotorPosition(fcid).x; // Motor position relative to the mount
double mountLocationX = mount.getLocations()[0].x;
double motorLocationX = mountLocationX + motorPositionXRel;
double motorCG = ((ThrustCurveMotor) motor).getCGPoints()[0].x + motorLocationX;
double motorMass = motor.getLaunchMass();
return (stageCG*stageMass + motorCG*motorMass) / (stageMass + motorMass);
}
public String getSustainerEngine() {
return sustainerEngine;