Structural ICD Overview

Change Log

These dimensions have been created in CAD and tolerance stacks will be confirmed to ensure compliance with the NanoRacks CubeSat Deployer.

The satellite will interface with the CubeSat deployer using four full length aluminum rails along it's corners. There is to be no mechanical or electrical interface between the deployer and the satellite, by the NanoRacks IDD.

By requirement (R-MEC-0070) three electrical separation switches are required to be in contact with the CubeSat Deployer. Three electrical switches will be used to contact the bottom of the CubeSat deployer. While the Satellite is in the deployer, the mechanical pins will be depressed, and then after launch they will, under a mild spring force the pins will extend releasing the electrical switch.

A Fit Check Model has been created based on the nominal dimensions of the NanoRack Deployer and will be used to confirm that the structure conforms to its dimensional requirements.

PWR ICD

Note that Power Submodule currently has a NX software bug preventing the creation of new drawings.

The small cut through the entire working volume allows for a pass-through for cables from the interface board in the Power module up into to the ADCS module. The second "chunk" that has been removed from the Power Module allows for one of the Torque rods to extend slightly into the Power Module.

In addition to the ICD, the parts and layout of the module has also been created.

PCU Board - UMS-0048 Rev 2

Battery Saddle - UMS-0023 Rev 1

The Batteries will be mounted directly to an aluminum milled part referred to as the "battery saddle."

PWR Module Upper Half Shell - UMS 0022

The final major component for the PWR module is the shell modules. The structural components use two of the 1/2U shells defined above, with one of them modified to accommodate the pass through for the Z torque rod. The dimensions for that cut are shown here.

PWR Module Separation Switch Assembly - UMS 0099

Two Separation switch assemblies are used in the lower half U-shell of the power model. the separation switches contain 3 electrical switches that determine whether the pins are still compressed in the Nanoracks deployer. The 4 pins collectively provide 9N of force.

PWR Module RBF Pin - UMS-0107

A single RBF pin is used to compress an electrical switch to ensure the system is off until placed in the Nanoracks container. Prior to launch the pin shall be removed.

PWR Module RBF Bracket - UMS-0106

ADCS ICD

ADCS Working Volume - UMS-0082 Rev 0

The ADCS Module for the MB-SAT uses one half shell and has a prescribed working volume laid out by the following drawing:

As with the Power module, the small cut through the entire working volume allows for a pass-through for connections from the Power module up through ADCS and into the Payload Module.

The second "chunk" that has been removed from the ADCS working volumes are for the torque rods. these torque rods will be mounted directly to the board.

ADCS Module Assembly - UMS-0055 Rev 3

The internals for the ADCS module are shown in the following assembly drawing.

ADCS Upper Shell - UMS-0025 - Rev 3

A major component for the ADCS module is the shell module. The structural components uses one 1/2U shells defined above, modified to accommodate the Z torque rod. The dimensions are shown here.

PAYLOAD ICD

Payload Working Volume - UMS-0079 Rev 0

The payload module has been given a working volume to develop it's components as necessary, the working volume that Payload has been alloted is shown in the following drawing:

The pass through for cables is not required to stay exactly straight through the entire working volume, but has been modeled like this to ensure that it is not missed in the development of the Payload internals. Also worth noting, that while this volume is very similar to the Power Module working volume, there is an additional section in the front which extends out further, indicating the opening of the Payload Modules for direct solar radiation into the module.

Payload Module Assembly - UMS-0056 - Rev 7

COMS ICD

COMS Module Working Volume - UMS-0083 Rev 0

The COMS Module also houses the CDH board and has a working volume as follows:

While the COMS module is made from the 1/2U shell, the height of the module is noticably less than that of the ADCS module. The additional space has been reserved for the Antennas and deployment systems.

COMS Module Assembly - UMS-0049 Rev 5

COMS, CDH and the Antenna/deployment system are assembled into the module as shown.

COMS-CDH Upper Shell - UMS-0029 Rev 4

The following edits are made to a 1/2U Shell to accommodate the COMS module.

Both the CDH and COMS interface boards have the same surface areas. CDH has a more restricted height on components, however the CDH components do not have significant heights that are cause for concern with the height restriction. The COMS CCA is allowed a greater height for the transceivers.

COMS CCA - UMS-0194 Rev 0

CDH CCA - UMS-0267 Rev 0

The additional 5.5 mm limit around the corner and center mounting points, ensures that no components will be placed where the mounting standoffs or bolt heads will be for the mounting hardware for the two boards.

Solar Panel ICD

Solar Panel Working Volume - UMS-0111 - Rev 0

In order for the Solar Panel Deployment System to fit within the NanoRacks deployer it has the maximum working volume defined below

Solar Panel Full Assembly

Solar Panel Burn System Assembly

Corner Rail ICD