178 lines
5.2 KiB
Markdown
178 lines
5.2 KiB
Markdown
# Autonomous Parking
|
||
|
||
Design cars that can park themselves safely without driver intervention.
|
||
|
||
|
||
|
||
## Connect
|
||
|
||
**Think about:**
|
||
|
||
* How do autonomous cars work?
|
||
* What would it take to ensure that autonomous cars are safe?
|
||
* What types of movements do autonomous cars need to perform?
|
||
|
||
## Construct
|
||
|
||
### Build
|
||
|
||
Build a @boardname@ vehicle that can park itself safely without driver intervention. Start by constructing this model:
|
||
|
||
[](https://le-www-live-s.legocdn.com/sc/media/lessons/mindstorms-ev3/building-instructions/ev3-rem-driving-base-79bebfc16bd491186ea9c9069842155e.pdf)
|
||
|
||
### ~hint
|
||
|
||
If clicking the above image doesn't open the instructions, right-click on the image and choose "Save link as..." to download the PDF.
|
||
|
||
### ~
|
||
|
||
### Check
|
||
|
||
Before you program, check:
|
||
|
||
* Are all the wires correctly connected from the motors to ports B and C?
|
||
* Are the wheels correctly installed?
|
||
* Are the wheels rotating freely?
|
||
|
||
### Program
|
||
|
||
Write a program that will make the robot turn three times in various ways.
|
||
|
||
**Think about:**
|
||
|
||
* How will you make the robot turn in different ways?
|
||
* How can the robot make a three point turn?
|
||
|
||
### ~hint
|
||
|
||
Consider using these blocks in your solution:
|
||
|
||
```block
|
||
motors.largeBC.tank(50, 50)
|
||
pause(500)
|
||
```
|
||
|
||
### ~
|
||
|
||
### Sample Solution - Three Point Turn
|
||
|
||
1. When the brick button is pressed, turn the driving base right and stop after 1.5 seconds.
|
||
2. Turn the driving base left and stop after 1 second.
|
||
3. Move the driving base forward for 3 seconds.
|
||
|
||
```blocks
|
||
brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
|
||
motors.largeBC.tank(75, 30)
|
||
loops.pause(1500)
|
||
motors.largeBC.tank(-30, -75)
|
||
loops.pause(1000)
|
||
motors.largeBC.tank(50, 50)
|
||
loops.pause(3000)
|
||
})
|
||
```
|
||
|
||
### Download and test
|
||
|
||
Click Download and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
|
||
|
||
## Contemplate
|
||
|
||
Choose one of the following autonomous driving scenarios and create a program for it:
|
||
|
||
* Parallel parking
|
||
* Angle parking
|
||
* Perpendicular parking
|
||
|
||
### ~hint
|
||
|
||
Document pseudocode for your program before choosing programming blocks.
|
||
|
||
### ~
|
||
|
||
### Sample Solution - Parallel Parking
|
||
|
||
1. When the brick button is pressed, drive forward in a straight line for 3 rotations.
|
||
2. Wait for 1 second.
|
||
3. Reverse motor rotation while turning for 1.5 rotations.
|
||
4. Reverse motor rotation while turning the other way for 1.5 rotations.
|
||
5. Drive backward in a straight line for 0.5 rotations.
|
||
6. Drive forward in a straight line for 0.5 rotations.
|
||
|
||
```blocks
|
||
brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
|
||
motors.largeBC.steer(0, 50, 3, MoveUnit.Rotations)
|
||
pause(1000)
|
||
motors.largeBC.steer(-50, -50, 1.5, MoveUnit.Rotations)
|
||
motors.largeBC.steer(50, -50, 1.5, MoveUnit.Rotations)
|
||
motors.largeBC.steer(0, -50, 0.5, MoveUnit.Rotations)
|
||
motors.largeBC.steer(0, 50, 0.5, MoveUnit.Rotations)
|
||
})
|
||
```
|
||
|
||
### Download and test
|
||
|
||
Click Download and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
|
||
|
||
### Differentiation
|
||
|
||
Create a program that simulates displaying appropriate warning lights while parking.
|
||
|
||
### ~hint
|
||
|
||
Consider using this block in your solution:
|
||
|
||
```block
|
||
brick.setStatusLight(StatusLight.OrangeFlash)
|
||
```
|
||
|
||
### ~
|
||
|
||
### Sample Solution - Simulating Reverse Gear and Reverse Warning Lights
|
||
|
||
1. When the brick button is pressed, drive forward in a straight line for 3 rotations.
|
||
2. Wait for 1 second.
|
||
3. Set brick status light to orange flash.
|
||
4. Reverse motor rotation while turning for 1.5 rotations.
|
||
5. Reverse motor rotation while turning the other way for 1.5 rotations.
|
||
6. Drive backward in a straight line for 0.5 rotations.
|
||
7. Set brick status light to off.
|
||
8. Drive forward in a straight line for 0.5 rotations.
|
||
|
||
```blocks
|
||
brick.buttonEnter.onEvent(ButtonEvent.Pressed, function () {
|
||
motors.largeBC.steer(0, 50, 3, MoveUnit.Rotations)
|
||
pause(1000)
|
||
brick.setStatusLight(StatusLight.OrangeFlash)
|
||
motors.largeBC.steer(-50, -50, 1.5, MoveUnit.Rotations)
|
||
motors.largeBC.steer(50, -50, 1.5, MoveUnit.Rotations)
|
||
motors.largeBC.steer(0, -50, 0.5, MoveUnit.Rotations)
|
||
brick.setStatusLight(StatusLight.Off)
|
||
motors.largeBC.steer(0, 50, 0.5, MoveUnit.Rotations)
|
||
})
|
||
```
|
||
|
||
### Download and test
|
||
|
||
Click Download and follow the instructions to get your code onto your EV3 Brick. Press the center button on the EV3 Brick to run the program.
|
||
|
||
### Share
|
||
|
||
**Think about:**
|
||
|
||
* What challenged you?
|
||
* Were there any surprises?
|
||
* How can you improve your program?
|
||
* Can your program be more streamlined? Have you used too many blocks?
|
||
* Is there a more efficient way to build your program?
|
||
* How can your program be used in real-world scenarios?
|
||
|
||
## Continue
|
||
|
||
* Click on the JavaScript tab and experiment with changing the values in the code.
|
||
* Add a custom image or sounds from the Brick or Music menus.
|
||
* Create a video of your project, especially your final presentation and your robot’s performance. Explain some important features of your software program.
|
||
* Include an image of your program with comments.
|
||
* Add a team photograph!
|
||
|
||
Congratulations! What will you design next?
|