Week - 4

Introduction:  NASA  came up with polynomials that can be used to evaluate thermodynamic properties such as specific heat, enthalpy and entropy. They have also documented the coefficients that are required to evaluate these polynomials for 1000+ species. The documented coefficients can be found here in NASA…

 Aim: 1) a. Explain the MATLAB model ‘Speed control of a DC motor using BJT H-bridge’.     b. Comment on the armature current shoot-up from the scope results.     c. Also explain the model ‘The Four-Quadrant Chopper DC Drive (DC7) block’. Compare it with the H-bridge model.…

Aim: 1)  Which types of power converter circuits are employed in an electric and hybrid electric vehicle?    2)  An Electric Vehicle's powertrain with a 72V battery pack is shown in the diagram below. The duty ratio for acceleration operation is 'd1' and for the braking operation the duty ratio…

Aim: 1) What is the difference between the mapped and dynamic model of engine, motor and generator? How can you change the model type?  2)How does the model calculate miles per gallon? Which factors are considered to model fuel flow?  3)Run the HEV ReferenceApplication with WOT drive cycle. Change the grade and…

Aim: Use the ADVISOR tool and simulate the following  1) For the EV_defaults_in file, if cargo mass is 500 kg with all other default conditions, can the vehicle travel for 45 km with FTP drive cycle? Conclude your observations. In the above case, try changing the battery capacity and repeat the simulation. 2) Perform gradeability…

Objectives: Implement control logic of a “washing machine” using Stateflow as per given sequence:  If the power supply is available, the system gets activated.  If the Water supply is not available, stop the process & indicate through the LED. Soaking time should be 200s followed by Washing time…

Aim: 1) Make a model of a Doorbell using solenoid block with the following details: When the switch is closed, the electromagnet should receive electrical power from the battery and pull the metal arm to hit the bell producing sound.  Create a situation where the switch is closed for 2 seconds and then…

Objectives:  To write code to fit a linear and cubic polynomial for the cp data.  Plot the linear and cubic fit curves along with the raw data points.  To write a code to show splitwise method. To explain the parameters used to measure the fitness characteristics for both the curves.  Also, answer the…

Aim: To calculate drag force against a cyclist.   Attachments Required:  A plot of Velocity vs Drag force. A plot of Drag Co-efficient vs Drag force.   Software Used: MATLAB    Theory: During cycling, the cyclist experiences a drag force in the direction opposite to his movement. This drag…

Aim: To write code that can solve an otto cycle and make plots for it. Requirement: Code should create a PV diagram. Software Used: MATLAB Theory: Air standard cycles are pretty important. They help us understand the theoretical limits of a particular cycle which can be used to get an idea about the performance of…

Introduction: In Engineering, an Ordinary Differential Equation (ODE) is used to describe the transient behavior of a system. A simple example is a pendulum. The way the pendulum moves depends on Newton's second law. When this law is written down, we get a second-order ODE that describes the position of the suspended ball…

Aim: To write a program to simulate the forward kinematics of a 2R Robotic Arm. Software Used: MATLAB. Theory:  When one gets started with robotics, the first thing that is taught is the kinematics of linkages. It has a lot of applications. Figuring out how the robot is going to move helps us identify its…