Advance Modelling - Automobile Suspension - DOF Modeling - Individual Demonstration Assignment Help

Internal Code : AA_AH_CHHI_AC

Individual Demonstration Assignment Help

TASK This section relates to the modelling of your car. If you don’t have a car, choose one you would like to drive. State the make and model of the car in your submission, you can even include a picture. The idea is that you should be able demonstrate that you can complete various analysis on the automobile chosen. The projects and tutorials during the term will help you choose suitable analysis methods. It will also help to focus your work on the assessment criteria points you do not have good evidence from the project work. So if you did not do a translational/rotational 2DOF analysis and model then do that in this section. This section also provides you a way to create and show evidence of your ability in analysing a 3DOF or higher system. You will need to find, estimate or calculate the mass and suspension data for the vehicle you choose. (they should be reasonable and somewhat justified):

• Masses, 2nd Moments of Inertia
• Stiffness, Damping values
• Dimensions
• Centre of Gravity position, etc.

QUESTION 1: 1 DOF Modeling Approximate the selected vehicle as a 1DOF system and analyse the system using theoretical calculations, Matlab commands/scripts and compare with a simulink model: a) For free vibration. b) For forced vibration. c) The response of the vehicle to typical road surface and possible road conditions you mayencounter when driving in your town. d) Include in your Simulink model suitable non-linearity’s and write a paragraph and/or show howor if these will affect the previous analysis. e) Expand on and discuss your results highlighting the findings from your analysis. f) Include a conclusion to summarise the key findings and recommendations from the analysis. QUESTION 2: 2 DOF modelling Improve your analysis by investigating pitch and vertical movement of the vehicle. In the 2DOF system there will be two mode shapes and two natural frequencies that can be determined. Demonstrate your competence by: a) Creating the two equations of motion. b) Writing the equations of motion in matrix form. c) Use Matlab commands or scripts using eigenvalues and eigenvectors or by other means,find the natural frequencies and mode shapes. d) Explain what the mode shapes and natural frequencies refer to. e) With a Simulink model investigate the performance of the suspension when travelling ongood and not so good road surfaces you may encounter when driving in your town. Include suitable non-linearities as your analysis requires. f) Expand on and discuss your results highlighting the findings from your analysis. g) Include a conclusion to summarise the key findings and recommendations from the analysis. QUESTION 3: 3 or 4 DOF modelling Model your automobile with a 3 or 4 DOF model to analyse the performance of its suspension. Demonstrate your competence by: a) Creating suitable equations of motion. b) Writing the equations of motion in matrix form. c) Use Matlab commands or scripts using eigenvalues and eigenvectors or by other means,find the natural frequencies and mode shapes. d) Explain what the mode shapes and natural frequencies refer to. e) With a Simulink model investigate the performance of the suspension when travelling ongood and not so good road surfaces you may encounter when driving in your town. Include suitable non-linearities as your analysis requires. f) Expand on and discuss your results highlighting the findings from your analysis. g) Include a conclusion to summarise the key findings and recommendations from the analysis.