Project 1 (Mini Project on Vehicle Direction Detection

Objective:

The primary objective of this project is to build a Simulink model which will send us the output of the direction of the vehicle, identifying the direction the vehicle is going to turn.

Requirement - 1:

• Steering wheel input as yaw rate (Signal name: SteeringWheel_YawDegreeInput) is the input for this system.
• This is compared against 3 angular values, one each for the left turn, right turn & straight drive (Calibration Values: Right_Turn_AngularLimit, Left_Turn_AngularLimit, Straight_Drive_Steering_Angle) to say which specific direction the steering wheel is turning towards.
• Use switch blocks to compare & develop this requirement. Keep this requirement in a subsystem & output of this requirement is a local signal (Signal Name: Vehicle_Turn_Status).

Requirement – 2:

• Keep this requirement as a separate subsystem. Inputs to this requirement are local signal from requirement 1 (Signal Name: Vehicle_Turn_Status) & an input signal from camera (Signal Name: CameraInput_RoadSign), which confirms the occurrence of a road sign.
• Signal Vehicle_Turn_Status is compared against calibration values (Calibration Values: RightTurn_RoadSign, LeftTurn_RoadSign, Straight_RoadSign), if each of them is found equal, then each of the three corresponding output is compared against the camera input signal,
• Using a logical operator block, only one among them is finally given as output signal (Signal Name: Vehicle_Direction_Indicator).

Signals & Calibration Data List:

Signal / Calibration Name	Signal Type	Data Type	Dimension	Min	Max	Initial Value	Units
SteeringWheel_YawDegreeInput	Input	Int16	1	-180	180	-	Deg
CameraInput_RoadSign	Input	Boolean	1	0	1	-	-
Vehicle_Turn_Status	Local	Int16	1	-180	180	-	Deg
Right_Turn_AngularLimit	Calibration	Int16	[1 1]	-180	180	30	Deg
Left_Turn_AngularLimit	Calibration	Int16	[1 1]	-180	180	-120	Deg
Straight_Drive_Steering_Angle	Calibration	Int16	[1 1]	-180	180	0	Deg
RightTurn_RoadSign	Calibration	Int16	[1 1]	-180	180	30
LeftTurn_RoadSign	Calibration	Int16	[1 1]	-180	180	-120
Straight_RoadSign	Calibration	Int16	[1 1]	-180	180	0
Vehicle_Direction_Indicator	Output	Boolean	1	0	1	-	-

Blocks used:

1) Constant Block : This is used to define the calibaration values.

2) Input blocks: Provides the inputs signals

3) Output Block : Provides output signals

4) Logic Block: This is used to assign OR block used to compare the signals from the camera with the boolean signals.

5) Switch Blocks: This is used to compare the input signals to the calibration signals

6) Mux Block: To compile the signals

7) Display Block: To display the results

Simulink model:

1) Main model

2) requirement sub-system

3) Requirement 1

4) Requirement 2

5) Data Dictionary

Procedure:

1) Requirement 1: if the input is (>=30) as the initial value is 30, the vehicle will be instructed to take a right turn, if the signal is non zero the vehicle will take a left turn else it will follow the straight line. the second input is given as a false condition to the first switch.

2) Requirement 2: This requirement is used to compare the signals from requirement 1 with the input signals from the camera.

If the signals are found to be equal to the (Vehicle_turn_status) , then the three corresponding signals are compared with the camera input by using the logical OR block will get true, and mux block is used to compile the outputs.

Result:

The turns are described as Right, left and straight.

the following output indicates the following results

- right turn = (1,0,0)

-left turn = (1,0,1)

- straight = (0,0,1)

from the display block attached to the output, we can observe that the vehicle is following a straight line.