ARC Structure, Mechanism, and Thermal


ARC Structure

The Structure, Mechanism, and Thermal subsystem is part of the core system group that is responsible for critical system operations. SMT is responsible for the structural and mechanical function of the cubesat. In addition to the core function, SMT supports the science mission objectives by assisting the responsible subsystems. SMT’s mission requirements push the design process and stimulate the development of the system. The requirements define the need for any design with the subsystem and its use.

Concept of Operation

SMT contains two operational components, structure and mechanism. The structure, which has only one state of operation, constrains and protects the electrical subsystems during testing, launch, and deployment. Mechanism has three states of operation: Assembled, Integrated, and Deployed. In the Assembled state, the antenna is tied to the burn circuit and the deployment switches are not pressed. In this state, power is managed via the Remove Before Flight (RBF) jumper. In the Integrated state, the cubesat is inserted into the P-POD. The deployment spring plungers are pressed by another cubesat which activates the deployment switch interrupts. The RBF pin is then removed, which transfers power interruption from the RBF to the deployment switches. When the cubesat is inserted into orbit, operation switches to the Deployed state. The deployment switches are released which enables ARC to initiate its start-up sequence. After an alotted time, the burn circuit executes its function and the antenna is deployed.