Project 1 (Mini Project on Vehicle Direction Detection

                                              Project:Vehicle Direction Detection

1) Aim: To create a Simulink Model for Vehicle Direction Detection as per given  Requirements.

2)Objective of Project: 

• Development of MATLAB Simulink model as per requirement.
• Tag the requirements to the simulink model; tagging requirement 1 & requirement 2 to their corresponding subsystems is fine.
• MBD compliant changes, Data Dictionary creation & code generation is an added advantage, and that is not scope of this project.

3) Requirements:

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 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 signals 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 an output signal (Signal Name: Vehicle_Direction_Indicator).

4)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	-	-

5) Simulink Model for Vehicle Direction Detection:

6)Blocks Used for Creating the Model:

Various blocks are used for creating the Simulink Model are Input block, Output Block,Constant Block, Logical Operator Block, Switch Block, Mux Block, Display Block.

Input Block: To provide the input signal.

Output Block: To  send the output signal.

Constant Block: To define the Calibration Value.

Logical Operator Block: OR block is used to compare the road signal with camera input and to get the boolean output.

Switch Block: To compare the input with calibration Value.

Mux Block: To compile the signals.

Display Block: To display the signals.

7) Creation of Subsystems: 

 7.1 Subsystems for Requirement:1

7.2 Subsystem for Requirement: 2

8) Requirement Tagging of Simulink Model:

The requirements Requirement-1 and Requirement-2 as provided in the Requirements word document are tagged to the corresponding subsystem in the Simulink Model.

The steps involved in the tagging a requirement in the model is to first highlight the required statement in the word document, and right click on the subsystem in the model that has to be tagged,then select Requirements and the Link to select the word.

9)SLDD file is created showing Signals and Constant  list as given in the required document:

Figure shows Simulink Data Dictionary Input, Output and Calibration parameters in Model Explorer.

10) Conclusion:

Autonomous vehicles consist of various Advanced Driver-Assistance System (ADAS) Features . Vehicle Direction Detection is one of the features of the  Vehicle. A Simulink Model is created as per the requirements.