2022-11-28 - 2023 Competition Power Architecture Update

Change Description

Description of Change

• Power architecture changed so that there is no need for an additional 3S battery for “VBAT clean” to power the Jetson and sensors. Instead, separate buck converters will be used to create separate 5V rails.

• The voltage of VBAT will either be 6S or 12S dependent on the results of further flight tests and if more thrust is required to be able to readjust the drone during flight

Implementation

The figure below illustrates the revised power architecture. Main change is that the 12V rail for the Jetson is made from a VBAT to 12V buck instead of using a separate 3S battery, and then the sensor 5V rail is made from a 12V-5V buck. The servo and sensor 5V rails are still separate meaning the sensors won’t be affected by servo noise.

Open

Reason for Change

More efficient/simple and don’t need the extra weight from the extra battery. Simpler design also means less dependencies and potential points for failure.

Priority

High

Low / Medium / High

Impact of Not Responding to Change

Previous drone power architecture would still be functional, but some parts would be unnecessary/less efficient.

What Groups, People, Sub-teams Need to be Notified?

• Mechanical: @Conall Kingshott @Megan Spee

• SysInt: @Aidan Bowers (Deactivated)

• EFS: @Anthony Luo @Christopher Chung

• EE: @Ethan Abraham @Daniel Puratich

Change Impact <Filled out by requestor>

Additional Parts/Resources Required and Costs

Previous 3S battery would now be replaced with an extra PDB.

Impact on deadlines

Alternatives and Recommendations

Comments

Change Request Sign Off <System Integration>

Status

Accepted / On Hold / Rejected / More info Requested

Comments

Signatures/Name