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B-1 Appendix B Epsilon User’s Manual Appendix B Lightband® Interface This document describes Lightband® interface.
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Appendix B
Epsilon User’s Manual
Appendix B
Lightband® Interface
This document describes Lightband® interface.
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Appendix B
Epsilon User’s Manual
B1. Mount Position
The coordinate systems of LV and Micro satellites are shown in Figure B1-1.
(The coordinates of other 2 satellites, SC2 and SC3, are arranged 120 [deg] apart.)
Figure B1-1 Coordinate Systems of LV (B) and Micro Satellite (SC1)
90°＋YB
180°＋ZB
＋XB
Separation Direction
＋Xsc
＋Zsc
＋Ysc
（4°)(504
.9m
m)
(138.36mm)
PLF-L PLF-R
0°
270°
FairingSeparation Plane
Launcher Boom
Section A-A[TOP VIEW]
Origin of the Micro Satellite(Center of the Mounting Surface of
Lightband® UpperRing
SC１
SC3
SC2
(494.0
2m
m)
(173.24mm)
Fairi
ng E
nvel
op
STA
6020.5
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B2. PL Usable Volume
PL usable volume is defined in Section 4.1.1.
The usable volume for a Micro satellite is shown in Figure B2-1.
Figure B2-1 Usable Volume for Micro Satellite
200
52
Φ15
1
800
600
14.7
600
Zsc
Xsc
Xsc
Ysc
Mounting Surface ofLightband® Upper Ring
B
View B
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Appendix B
Epsilon User’s Manual
B3. Mechanical Interface
(1) Details of Lightband®
The connection/separation system for Micro satellites is Lightband® (8 inch MLB8.000-12)
manufactured by Planetary Systems Corporation.
The interface dimensions of the Lightband® are shown in Figure B3-1.
The interface on Micro satellite rear frame surface with the Lightband® upper ring is shown in Figure
B3-2.
Notes:
For any related information not provided in this document, refer to 2000785F MkII MLB User Manual
(Lightband® User Manual).
If there is any discrepancy between this document and Lightband® User Manual, this document will
prevail.
If you are uncertain or doubtful about any description in this document, contact your Program
Director.
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※The number and arrangement of separation springs are for reference. Actual ones are defined in ICD of
each micro satellite.
Figure B3-1 (1/2) 8 inch Lightband® Interface Dimensions (connected)
(φ5.93±0.02inch)φ150.6±0.51mm(Lower Ring)
(φ7.00±0.02inch)φ177.8±0.51mm(Upper Ring)
(φ10.04±0.02inch)φ255.0±0.51mm(Upper & Lower Ring)
(0.56±0.02inch)14.2±0.51mm(Lower Ring)
(5.39±0.02inch)136.9±0.51mm
(6.0
±0.0
3in
ch)
152.4
±0.7
6m
m
(Low
er Rin
g)
(Lower Ring)
ボルトP.C.D(φ8.0±0.01inch)φ203.2±0.25mm
+Ysc
+Xsc
SeparationConnecter J11
SeparationSwitch
SeparationSwitch
SeparationConnecter J12
+Zsc
(2.1
±0.0
15in
ch)
53.3
±0.4
mm
(0.14±0.01inch)3.56±0.25mm(Upper Ring Mounting Flange)
(0.17±0.01inch)4.32±0.25mm(Lower Ring Mounting Flange)
(0.32±0.01inch)8.1±0.25mm
(1.7
9±
0.0
1in
ch)
45.5
±0.2
5m
m
SeparationConnecter P11
(0.34±0.01inch)8.6±0.25mm
Mount Panel Cover
Flatness 0.3mm
Satellite
Rocket
SeparationConnecter J11
Bolt
Connector
Connector
Connector P11
Connector J11
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Figure B3-1 (2/2) 8 inch Lightband® Interface Dimensions (separated)
[BOTTOM VIEW]
Figure B3-2 Interface on Micro satellite rear frame surface with Lightband® upper ring
Satellite
Rocket
SeparationConnecterSeparation
Switch
SeparationSpring
(2.7
4±
0.0
1in
ch)
69.6
±0.2
5m
m
(1.11±0.01inch)28.2±0.25mm(2
.16±
0.0
1in
ch)
54.9
±0.2
5m
m
(1.03±0.02inch)26.2±0.51mm
UPPER RING
LOWER RING
Fastening bolts to the satellite
Mount Panel Cover
+Ysc
+Xsc
φ228.6 min
15°
30°
（TYP）
8inch Lightband®Envelop( ) φ203.2P.C.D
φ0.3
600 MAX
60
0M
AX
Ra 3.2
12-1/4" -28UNF Lock Insert 2D sizeEQUALLY SPACED
0.05
（Part of ）
φ177.3 MAX
[mm]
Connector
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(2) Interface Demarcation Point
The interface demarcation point is shown in Figure B3-3.
Figure B3-3 Interface Demarcation Point
Micro Satellite
Fastener between
micro Satellite and
Lightband® upper
ring
Mount Panel Cover (LV)
LV side
Micro Satellite side
Panel of Multi Satellite Mount Structure(LV)
Mount Panel Cover
Lightband®
Lightband®
InterfaceDemarcationpoint
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(3) Rear Frame of Micro Satellite
The rear frame of a Micro satellite is not subject to direct load generated by the tip of each separation
spring because the load is mitigated by the Lightband® upper ring.
(4) Material for Mating Section
The standard materials for the mating section are shown in Table B3-1.
Table B3-1 Materials for Mating Section
PL side LV side
Material Defined in ICD Aluminum Alloy
(5) Coating on Mating Section
The standard coatings on the mating section are shown in Table B3-2.
Table B3-2 Coatings on Mating Section
PL side LV side
Contact Surface Defined in ICD Anodic oxidation coating MLI-A-8625, TYPEIII, Class1
Other
Surfaces
Defined in ICD Anodic oxidation coating MLI-A-8625, TYPEIII, Class1 Electroless nickel plating AMS-B26074, Class4, GradeB Chemical conversion coating MIL-C-5541, Class3
etc.
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(6) Mass of parts of the separation system remaining on PL side
The mass of parts of the separation system remaining on Micro satellite side after separation is
shown in Table B3-3.
Table B3-3 Typical mass of parts of separation system remaining on Micro satellite side after separation
Nominal Notes
Mass [kg] 0.511 -
Center of Gravity
[mm]
Xsc -6.01 Coordinate System
is shown in Figure B2-1. Ysc -0.03
Zsc -9.84
Note: Values are for standard configuration of parts. The details of remaining parts of separation
connectors and separation switches are shown in Section B3. (9) and Section B3. (10),
respectively.
(7) Mechanical interface between Lightband® upper ring and Micro satellite rear frame
Typical mechanical interface between a Lightband® upper ring and a Micro satellite rear frame is
shown in Table B3-4.
Interface dimensions in the mating section of a Lightband® upper ring and a Micro satellite rear frame
are shown in Figure B3-4.
Customer shall verify the strength of the mating section of its Micro satellite rear frame.
The strength of each fastener is shown in Table B3-5. The allowable load of the fastener and reference
value of the maximum axial force at the highest tightening torque as seen in Table B3-4 are shown in
Table B3-5.
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Table B3-4 Typical mechanical interface between Lightband® upper ring and Micro satellite rear frame
Number of Fasteners 12
Fastener Part Number NAS1351N4-12 (L = 19.05 mm)
Washer Part Number NAS620B416 (t = 1.6 mm)
Running Torque 0.4 to 3.3 N･m
Customer, before shipping, shall confirm that the bolt
holes on its satellite rear frame meet the above running
torque value.
LSP, before mating, will confirm that the bolt holes meet
the above running torque value, and then apply combined
forces of running torque and tightening torque to tighten
fasteners.
Tightening Torque 8.7 to 10.1 N･m
Insert Length: 2D
Lock type (Lock insert)
Coating: No Coating
Procurement Fasteners & washers: LV
Inserts: PL
Figure B3-4 Interface Dimensions of Mating Section
of Lightband® upper ring and Micro satellite rear frame
Lock Insert (2D)
（3.4
3）
SC side
Lightband® Upper ring
Washer：NAS620C416(t=1.6)
Fastener：NAS1351N4-12(L=19.05)
Scre
w D
epth
14
.5 M
IN
[mm]
PL
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Appendix B
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Table B3-5 Allowable load of fastener and reference value of maximum axial force
Unit Value Notes
(A) Initial Axial Force N 8,494 Tightening Torque 10.1 [Nm]
(B) Heat Load N 156.5
Assumed ambient temperature range: 14 to
26°C
Increased heat load when the ambient
temperature rises to 26°C from 14°C
(fastener is tightened at 14°C).
If you need to extend the range, extrapolate
linearly (13 N/°C).
(C) Internal Coefficient ― 0.53
(D) External Force
(Assumed)
Yield N 8,363 This value is stated in Lightband® User
Manual.
(E) Ultimate N 10,453 = D x 1.25
- Max Axial Force
Yield N 13,104 = A+B+C x E
- Ultimate N 14,218 = A+B+C x E
- Strength
Yield N 19,416 NAS1351N4
- Ultimate N 25,889 NAS1351N4
- Margin of Safety
Yield ― 0.48
- Ultimate ― 0.82
(8) Separation Spring
The number and arrangement of separation springs will be defined in ICD.
Refer to Lightband® User Manual for the characteristics of separation springs.
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(9) Separation Connector
Two separation connectors of Lightband® are used as standard.
The appearance of the separation connector is shown in Figure B3-5.
The specifications of the separation connector are shown in Table B3-6.
Refer to Chapter B4 for its electrical interface.
Figure B3-5 Separation Connector
Table B3-6 Specifications of Separation Connector
Number of connectors 2
Connector Arrangement See Figure B3-1.
Pin Arrangement See Chapter B4 (Electrical Interface).
Spring characteristic See Lightband® User Manual.
Procurement By LV
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(10) Separation Switch
Two separation switches of Lightband® are used as standard.
The appearance of the separation switch is shown in Figure B3-6.
The specifications of the separation switch are shown in Table B3-7.
If 3 switches are needed, contact your Program Director.
Refer to Chapter B4 for its electrical interface.
Figure B3-6 Separation Switch
Table B3-7 Specifications of Separation Switch
Number of switch 2
Switch Arrangement See Figure B3-1.
Spring characteristic See Lightband® User Manual.
Procurement By LV
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B4. Electrical Interface
B4. 1 Separation connector of Lightband®
Two separation connectors of Lightband® are used as standard. See Section B3 (9) for its appearance.
The electrical interface is shown in Table B4-1.
LV uses some pins on each separation connector as shown in Table B4-1 with short wires connected
for detecting separation status. Pins other than those used by LV are available for Customer.
Customer may use these separation connectors as separation switches; however, it should be noted
that the connectors have the normally open contact and that the status is open after separation. In
addition, LV does not guarantee any Micro satellite the use of the separation connectors after separation
in its orbit.
Electrical connections between a Micro satellite and LV or launch site facilities are not provided via
umbilical line as standard.
Customer can access its PL for charging its battery or other operations before mating with Lightband®
or before encapsulation into PLF.
The separation connectors serve as bonding pass between Lightband® upper ring and its lower ring.
Table B4-1 Electrical Interface of Separation Connector
Number of connectors 2
Connector Location See Figure B3-1.
Pin Assignment See Figure B4-1.
Pins used by LV J11: pin No. 4, 11, 5, 13
J12: pin No. 5, 13
Procurement By LV
Figure B4-1 Pin Assignment
Separation Connector(Lower Ring側)
Separation Connector(Upper Ring側)
1 8
9 15
8 1
15 9
Separation connector(Upper)J11,J12
Separation connector(Lower)P11,P12
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B4. 2 Separation switch
(1) Separation Switch of Lightband®
Two separation switches of Lightband® are used as standard. If 3 switches are needed, contact your
Program Director. See Section B3 (10) for its appearance.
The electrical interface is shown in Table B4-2.
LV does not guarantee any Micro satellite the use of the separation switches in its orbit.
Table B4-2 Electrical interface of Separation Switch
Number of switches 2
Switch Location See Figure B3-1.
Switch Type SPDT (Single-Pole Double-Throw)
Circuit Diagram See Figure B4-2.
Procurement By LV
* Separated state
Figure B4-2 Circuit Diagram of Separation Switch
Lightband® upper ring
Lightband® lower ring
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(2) Separation Switch provided by PL
PL can install separation switches chosen and provided by itself, instead of separation switches of
Lightband®, on the Lightband® upper ring.
After PL connected with the Lightband, separation switches are inaccessible, and the dimensions
around them cannot be measured.
Strokes of the separation switches are defined in ICD because their movement in height direction are
affected by reaction force of the separation switches. Customer shall inform Program Director of the
reaction force.
The separation switches of Lightband® are recommended if Customer is to require high accuracy of
PL rate in separation because the separation springs are arranged based on reaction force of the
separation switches of Lightband®.
Since separation switches provided by PL can greatly increase PL rate in separation, Customer should
consult Program Director for their use.
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B4. 3 Bonding
Bonding is also described in Section 4.4.6.
PL is electrically connected with Lightband® upper ring via fasteners and inserts (Figure B4-3).
Customer shall confirm in advance that the resistance between two points as shown below meets the
required value described in Section 4.4.6.
(1) A head or washer of each fastener fixed on Lightband® upper ring
(2) PL main structure
Bonding jumpers are also acceptable for ensuring the electrical connectivity .
Figure B4-3 Bonding pass
SC structure
Upper Ring
LV structure
LowerSeparation Connector
UpperSeparationConnector
SC and Lightband® Upper Ring can conduct through a bolt and a washer.
Contact surface does not have conduction.
Insert( No surface coating)
Bonding pass
Lower Ring
PL
Contact surface is not conductive.
Washer secures electrical conductivity between PL and
the Upper ring.
