Table of Contents
MSD I: Readiness to move to Build & Test
Closed Action ItemsElectrical
- High-level system architecture has been established.
- Major components have been ordered and testing will be conducted over the next few weeks.
- Electrical interface requirements from the customer have been refined and the current design meets the specifications.
- CAD Model ideas have been portrayed in 1st iteration
- FEA Analysis completed on 1st design
- Drive system has been researched and ordered
- TCP/IP packet data that will be inputted and outputted to the K-Mirror control system has been defined.
- Control System board has remained to be a Raspberry Pi.
- Programming language of choice for control system has remained to be Python.
- Testing of the POC stepper motor and control system has been successful and more testing will be done before the start of MSD II.
Open Action ItemsElectrical
- The safety system, intended to shut the system down
during an emergency situation, is still under
development. Risk assessment is being taken seriously due
to the possibility of injury from the assembly.
- Safetey components still need to be specified and incorporated into electrical schematic.
- An electronics box, intended to house the electronic components, still needs to be designed. This includes the wire connections into and out of the enclosure, as well as the physical placement of each electrical component inside the box.
- We are still waiting on some positioning information from our customer for different aspects of the design. In the meantime, we have recently received additional information that will allow us to continue working with our design.
- Encoder still needs further research and then will be ordered.
Milestones for MSDIIElectrical
- Develop a wiring harness cabable of powering all of the electrical components. Additionally, digital communications should be sending properly over their respective cables.
- Design a safety system that eliminates any possibility of anyone being seriously hurt during the operation of the k-mirror assembly.
- Incrementally test each subsystem to ensure proper operation before connecting everything at once.
- Have a completed design that meets deflection tolerances.
- Fabricate the design and have those design deflection tolerances met.
- Rotate in the required range with no deflections.
Team Vision for Imagine RITElectrical
- Wiring of motor system and Rasberry Pi are a bare minimum.
- Safety systems, including emergency stop buttons, must be used to prevent injury during operation.
- 3D print a smaller scale model to put on display.
Goals for Week 5 Test DemoElectrical
- Have wiring complete to allow the Raspberry Pi to
send motor commands to the motor.
- RS485 bus from Raspberry Pi to motor controller.
- 24V power supply powering electromagnetic brake on motor.
- 5V power supply powering Raspberry Pi.
- Have a fully designed safety system, which is ready enough to order parts.
- Have the majority of parts back from machine shops.
MSD II: Project close-out
There have been various roadblocks hindering the
development of this project. Due to the collaboration
with five other universities, there is significant lead
time in getting answers to important questions.
Nonetheless, the main components of the electrical system
have been specified. The only remaining action item is to
fully develop the safety system. It has been deemed that
additional time needs to be put into this because safety
while operating the assembly is a top priority for this
The mechanical structure is actively under development. Analysis still needs to be done to ensure the design meets the deflection tolerances.
On the software side, progress is being made in defining the packet structures to and from the telescope, as well at to the motor controller. A high level software architecture has been proposed and is currently in the revision process.