ENGT5101 Electromechanics

Design, Modelling and Analysing of a Vehicle Drivetrain using SimDriveline, and Model based design of a simple power transmission system

The learning outcomes that are assessed by this coursework are:

1.Ability to be familiar with the basic building blocks of the SimDriveline model, including their characteristics and purposes

2.Ability to model different power transmission systems (e.g. gear and clutch systems) and vehicle drivetrain using SimDriveline

3.Ability to analyse the system behaviour by defining input signals using signal builder and plotting of output signals with the use of scopes where appropriate

4.Ability to perform model based design with a simple case study (simple power transmission system)

5.Ability to describe and discuss the main features of model based design methodology.

Late submission of coursework policy: Late submissions will be processed in accordance with current University regulations which state:

“the time period during which a student may submit a piece of work late without authorisation and have the work capped at 40% if passed is 14 calendar days. Work submitted unauthorised more than 14 calendar days after the original submission date will receive a mark of 0%.  These regulations apply to a student’s first attempt at coursework. Work submitted late without authorisation which constitutes reassessment of a previously failed piece of coursework will always receive a mark of 0%.”

Academic Offences and Bad Academic Practices:

You have studied various components of machine system such as belt drives, clutch and gear systems but lack experience in design, modelling and analysis of this kind of system, for example, a Vehicle Drivetrain.  This coursework is designed in such a way that you will first be familiar with simple system by exploring and analysing available examples, then moving on to define input into the system to investigate the output or the behaviour of the system. In addition, you will be required to model a Vehicle Drivetrain based on a well-recognised system, and analyse the system behaviour with the aim to redesign or modify the system to meet different operational requirements.

Learning Objectives

1)To be familiar with the basic building blocks of the SimDriveline model, including their characteristics and purposes

2)To learn how to model different power transmission systems (e.g. gear and clutch systems) and vehicle drivetrain using SimDriveline

3)To learn how to analyse the system behaviour by defining input signals using signal builder and plotting of output signals with the use of scopes where appropriate

4)To be able to perform model based design with a simple case study (simple power transmission system)

5)To be able to describe and discuss the main features of model based design methodology.

a)With the use of Help – Documentation (F1) – Search Help (by keying the keywords), briefly introduce the purpose of the Solver, Mechanical Rotational Reference, Simulink-PS Converter (and the corresponding PS to Simulink Converter), Inertia and Scope. Also explain the differences between PS and Simulink signals and how they are represented in the SimDriveline blocks.

b)Double click on both the sensor blocks, list the type of sensors used in this model and briefly introduce their functions.

c)Plot the output signals on the scope.

d)Introduce one of the meshing losses to the gear and plot the output signals on the scope, comment on the difference between the output signals

e)Now locate the file related to Variable Ration Gear (figure 2) by clicking Help – Examples – Simscape Driveline – browse for Variable Ratio Gear – click Open Model, again rename the file.

f)Briefly explain the Variable Ratio Transmission block and the B, F and r ports on the block.

g)Explain the purpose of the Signal Builder; plot the input signal from the Signal Builder and the output signals on the scope.  

h)Then add an additional signal to the Signal Builder, alter the signal connection to the new signal, and plot the relevant system input signal and system output behaviour.  Give your comment where appropriate.

i)Briefly discuss your observation of the results/plots obtained and draw necessary conclusions.