P18025: ZoomTots RIT/public/
Subsystem Build & Test
Table of Contents
Team Vision for Subsystem Level Build & Test PhaseDuring this phase of MSDII, our goal was to assemble and test the individual systems of the car including power steering, carseat mounting, child controls mounting, and controls connection. This phase resulted in a completed power steering system, a completed carseat mounting system, a partially completed child control mounting system, and software connections between "specific parts idk". The culmination of these individual successful build tasks will allow for a simplified integration phase coming up.
Manufacturing and Build Results
Power SteeringThe power steering system initially required a slot to be manufactured. This slot was made using a found sheet of aluminum and manufactured using a mill.The progression of photos below show the slot being manufactured, attached to the gear, and meshed with the a shoulder bolt that will be used as the pin for power steering.
Initial Servo TestThe link to our initial servo test can be found here. It can be observed that depending on the direction of the joystick on the controller, the servo turns one way or another. The link to a video of this test is:https://youtu.be/QKh8bYBauds
Initial Power Steering TestThe link to our initial power steering test can be found here. This test is more complete than the last and shows the servo mounted onto the axle. This test is not complete as the servo is not fully attached to the axle. The link to a video of this test is: https://youtu.be/O070QgYs0MM
Final Power Steering Assembly
Mounted Power Steering TestThe link to our fully mounted power steering test video can be found here. This video shows the servo mounted to the car using a thick metal plate and screws. The link to a video of this test is:https://youtu.be/h3yzXAVoXuw
- motor controller, servo, joystick, and remote control are all successfully paired
- the wii remote is the only device that still needs to be paired
- completed a motor controller test to figure out the
expected output voltage for each direction of the motor
- 0V is all the way to the left
- 6V is all the way to the right
- 3V centered
- in testing the servo, the current limit was reached when the servo hit each end of its range
- all of the controls for the motor can be done using the PWM driver
- the joystick works as expect and will be simple to implement
Test Results Summaryhere.
Risk and Problem Trackinghere
Link to risk assessment can be found here
Technical Paper PlanAs we move forward in our project, we have begun to think about how to present our project as a whole. An outline of our technical paper can be found here.
MSDII Gantt Charthere.
Plans for next phaseFor the integrated system build and test phase, the team will finish up the car by completing the tasks listed below.
- Mount carseat mount to car frame
- Attach tall gusseted brackets on the backside of 80/20 frame (10/24)
- Finish building child controls support tray piping
- Drill holes in all pipes (10/11)
- Glue and attach the bottom tubes (10/17)
- Glue elbow joints to pipes (10/17)
- Cut out top pipe collar and glue it into the table cap (10/17)
- Build & mount the child control tray
- Cut out 2 trays (10/17)
- Smooth edges (discussion with machine shop) (10/17)
- Cut foam & fabric for arm rest for joystick (10/17)
- Meet with child to troubleshoot child controls mounting (10/31)
- Design and buy materials for framing/aesthetics (next phase)
- connect wii remote using driver software (10/17)
- connect electronics together (10/24)
- wire motors (10/17)
- decide on and fabricate outer shell for car (10/25)
- finish integrating subprograms for controlling car (10/25)
- write technical paper-assign parts to various team members (10/25)
- make poster plan (10/18)
- make sure that all components are purchased (10/17)
- create final BOM (10/25)
- integration tests (10/25)