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Fixed computation of Logitudinal Unit Inertia for tube like things.

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This commit is contained in:
kruland2607 2014-11-12 09:12:56 -06:00
parent fcd3220633
commit b93926ec4b
2 changed files with 21 additions and 21 deletions
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4
core/src/net/sf/openrocket/rocketcomponent/BodyTube.java
View File

@ -281,8 +281,8 @@ public class BodyTube extends SymmetricComponent implements MotorMount, Coaxial
@Override @Override
public double getLongitudinalUnitInertia() { public double getLongitudinalUnitInertia() {
// 1/12 * (3 * (r1^2 + r2^2) + h^2) // 1/12 * (3 * (r2^2 + r1^2) + h^2)
return (3 * (MathUtil.pow2(getInnerRadius())) + MathUtil.pow2(getOuterRadius()) + MathUtil.pow2(getLength())) / 12; return (3 * (MathUtil.pow2(getOuterRadius()) + MathUtil.pow2(getInnerRadius())) + MathUtil.pow2(getLength())) / 12;
} }
@Override @Override

38
core/src/net/sf/openrocket/rocketcomponent/LaunchLug.java
View File

@ -86,7 +86,7 @@ public class LaunchLug extends ExternalComponent implements Coaxial {
} }
public void setLength(double length) { public void setLength(double length) {
if (MathUtil.equals(this.length, length)) if (MathUtil.equals(this.length, length))
return; return;
@ -95,9 +95,9 @@ public class LaunchLug extends ExternalComponent implements Coaxial {
} }
@Override @Override
public void setRelativePosition(RocketComponent.Position position) { public void setRelativePosition(RocketComponent.Position position) {
super.setRelativePosition(position); super.setRelativePosition(position);
@ -112,30 +112,30 @@ public class LaunchLug extends ExternalComponent implements Coaxial {
} }
@Override @Override
protected void loadFromPreset(ComponentPreset preset) { protected void loadFromPreset(ComponentPreset preset) {
if ( preset.has(ComponentPreset.OUTER_DIAMETER) ) { if (preset.has(ComponentPreset.OUTER_DIAMETER)) {
double outerDiameter = preset.get(ComponentPreset.OUTER_DIAMETER); double outerDiameter = preset.get(ComponentPreset.OUTER_DIAMETER);
this.radius = outerDiameter/2.0; this.radius = outerDiameter / 2.0;
if ( preset.has(ComponentPreset.INNER_DIAMETER) ) { if (preset.has(ComponentPreset.INNER_DIAMETER)) {
double innerDiameter = preset.get(ComponentPreset.INNER_DIAMETER); double innerDiameter = preset.get(ComponentPreset.INNER_DIAMETER);
this.thickness = (outerDiameter-innerDiameter) / 2.0; this.thickness = (outerDiameter - innerDiameter) / 2.0;
} }
} }
super.loadFromPreset(preset); super.loadFromPreset(preset);
fireComponentChangeEvent(ComponentChangeEvent.BOTH_CHANGE); fireComponentChangeEvent(ComponentChangeEvent.BOTH_CHANGE);
} }
@Override @Override
public Type getPresetType() { public Type getPresetType() {
return ComponentPreset.Type.LAUNCH_LUG; return ComponentPreset.Type.LAUNCH_LUG;
} }
@Override @Override
public Coordinate[] shiftCoordinates(Coordinate[] array) { public Coordinate[] shiftCoordinates(Coordinate[] array) {
array = super.shiftCoordinates(array); array = super.shiftCoordinates(array);
@ -183,8 +183,8 @@ public class LaunchLug extends ExternalComponent implements Coaxial {
} }
@Override @Override
public double getComponentVolume() { public double getComponentVolume() {
return length * Math.PI * (MathUtil.pow2(radius) - MathUtil.pow2(radius - thickness)); return length * Math.PI * (MathUtil.pow2(radius) - MathUtil.pow2(radius - thickness));
@ -211,8 +211,8 @@ public class LaunchLug extends ExternalComponent implements Coaxial {
@Override @Override
public double getLongitudinalUnitInertia() { public double getLongitudinalUnitInertia() {
// 1/12 * (3 * (r1^2 + r2^2) + h^2) // 1/12 * (3 * (r2^2 + r1^2) + h^2)
return (3 * (MathUtil.pow2(getInnerRadius())) + MathUtil.pow2(getOuterRadius()) + MathUtil.pow2(getLength())) / 12; return (3 * (MathUtil.pow2(getOuterRadius()) + MathUtil.pow2(getInnerRadius())) + MathUtil.pow2(getLength())) / 12;
} }
@Override @Override