Faculty of Engineering, Environment and Computing
7096MAA Alternative Propulsion Systems
Assignment Brief
| Module Title Alternative Propulsion Systems | Individual | Cohort Jan | Module Code 7096MAA | |
| Coursework Title: Engineering a Hybrid system RESIT | Hand out date: 21/06/21 | |||
| Lecturer Georgios Chrysakis Kamyar Nikzadfar Raja Mazuir Bin Raja Ahsan Shah | Due date and time: Date:02/08/21 Online: 18:00 | |||
| Estimated Time (hrs): 50 hours/student Word Limit*: 2500/student | Coursework type: Report | 100% of Module Mark | ||
| Submission arrangement online via Aula: 18:00 on 2nd August 2021 File types and method of recording: : PDF of the reports, Simulink model files Mark and Feedback date (DD/MM/YY):16th August 2021 Mark and Feedback method (e.g. in lecture, electronic via Aula): Turnitin script | ||||
| Module Learning Outcomes Assessed: Extensive understanding of concepts and applications of various Advanced Vehicle Propulsion SystemsAppraise the use of battery technology in hybrid and hybrid electric vehicle systemsApply concepts of traditional engine technology and alternative propulsion systems along with battery technology to design and develop various hybrid engine layoutsCritically appraise the implications of utilising alternative and sustainable energy sources and their efficiency Design and perform experiments along with analysis and retrieval of relevant data |
| Task and Mark distribution: You are asked to design and engineer a series hybrid powertrain in order to meet some specific design criteria using model based design approach. The vehicle is provided with a 4 cylinder 1l petrol engine. The specification of the vehicle is as follows: Mass : 1000kg + [the last 3 digits of your SID]Total aerodynamic drag coefficient: 0.3Tire size: 185/65R14The rolling resistance is 0.015The map of engine torque generation as well as the engine bsfc is given in the attachment fileThe typical efficiency maps for different types of electromotors are given as attached files in AULA. The vehicle is required to have an acceleration of 9s for 0-100km/h in horizontal road. In the following brief EG means Engine Generator, MD is Motor-Drive and VD is Vehicle Dynamics. According to the serial hybrid architecture, evaluate the required specification for the motor(S), transmission, generator and battery. For each section, take in to the account the followings: Motor-drive(s): (5%) Calculate the required rating power for motor-drive based on the required acceleration time, find the transmission ratio and also the number and type of connection of motor to the wheels. For the selected motor-drive, report the selected brand and type, required DC voltage supply, rated power and torque, max speed, base speeds and also maximum current. Generator: (5%) Based on the proposed internal combustion engine and others requirements, calculate the rated power of generator and the gear ratio between engine and generator. For the selected generator, report the selected brand and type, required DC line voltage, rated power and torque, max speed, base speeds and also maximum current. Battery: (10%) Based on the DC voltage of generator and MD and also the power requirements of motor-drive(s) and the capability of EG, design the battery pack. The battery pack can be composed of some modules. Design the battery pack should comprise the followings: The type of battery cells used in the battery packThe number of battery cells in parallel and serialsThe capacity of battery in AhShow the characteristic maps of cell and battery ( and )Calculate the maximum attainable current of battery Powertrain model development : (25%) Based on the selected items (motor-drive and generator) and other technical properties of vehicle and engine, develop a proper model in MATLAB/Simulink comprising EG/MD/VD. For the connecting shaft between engine and generator assuming a rotational inertia of 0.1 kg.m². Your model should comprises of the followings block/considerations: The engine block comprising the bsfc map of engine and torque generation mapGenerator block based on efficiency map modelling approach, use the scaling method to fit the typical efficiency maps to the selected generatorMotor-drive block based on efficiency map modelling approach, use the scaling method to fit the typical efficiency maps to the selected MDBattey model (Use a simple R-int modelling approach), assume that initial SoC of battery is 80%Tire model and vehicle dynamics blockTake into the account the efficiency of transmission (between engine and generator/between MD and tyres, if needed) Test the developed model based on the following conditions; turn the engine and generator off, turn on MD with maximum torque and plot the speed-time of the vehicle. Based on the plot calculate the followings. The maximum attainable speedThe 0-100km/h acceleration For each model block, discuss the modelling approach and support your modelling report by the proper governing equations. Also discuss the results and try to support your discussion by proper sensitivity analysis i.e., how changing in different parameters can affect the final results (max speed and acceleration). Engine Generator Controller (25%) Find the optimal efficiency operating point of the engine (Find the RPM and Torque of the optimal point on the bsfc map). Develop two independent PI controllers and implement them on you model so that the engine is always operating in the most optimum point. These two controllers should: Control the engine speed by manipulating the engine throttle valveControl the engine torque by manipulating the “x” of generator Turn the EG on and turn the MD off. Show that the developed controller can control the engine to operate in the optimal point. Use the following plots to express the performance of your design: Plot the rpm of engine as a function of timePlot the torque of engine as a function of timePlot the Current of generator as a function of timePlot the SoC as a function of time For the above plots, choose a proper time interval to show the result, i.e., the time interval that the system states reach to their steady state conditions. For each plot give sufficient description and discuss the correlation between the different parameters which is depicted in the plot. Vehicle Control Unit development (30%) Develop a proper controller (VCU) for controlling the EG and MD based on On–Off or thermostat control strategy. In thermostatic control strategy “ The operation of the engine/generator is completely controlled by the SOC of the battery. When the SOC of the battery reaches its preset top line, the engine/generator is turned off, and the vehicle is propelled only by the battery. On the other hand, when the SOC of the battery reaches its bottom line, the engine/generator is turned on. The battery obtains its charging from the engine/generator. In this way, the engine can be always operated within its optimal deficiency region.” (Ehsani et al. 2018). Assume the preset level to be 80% and the set level to be 60% SoC. Using a proper driver model plot the following based on Worldwide Harmonised Light Vehicles Test Procedure (WLTP) Class 3 Driving Cycle. Plot the followings: Plot the achieved vehicle speed-time and compare that with WLTP class 3 DC.Plot the state of engine On/Off as a function of timePlot the generated torque of motor as a function of timePlot the MD current as a function of timePlot the level of SoC as a function of timeCalculate the average fuel consumption (lit/100km) and CO2 generation (gr/km) in the cycle You need to describe each plot and discuss the result. Modelling considerations: The software to be used is Matlab/SimulinkThe starting capacity of the battery for the drive cycle is 80% Report considerations This is an engineering report requiring adequate formatting. Marks will be allocated for referenced material and appropriate discussion. Estimations of fuel consumption and acceleration results according to literature will not be accepted. You MUST use the brake specific fuel consumption (BSFC) maps provided to calculate fuel consumption. The motor/generator efficiency maps should be considered based on the maps provided in AULA. ALL results must be referenced from your submitted models. Battery SOC must be demonstrated how it is changing during the drive cycle as without it the model is considered incomplete. Every objective component must be clearly identified in the report. All relevant data must be in the report for marking. |
| Notes: 1. You are expected to use the Coventry University Harvard Referencing Style. For support and advice on this students can contact Centre for Academic Writing (CAW). 2. Please notify your registry course support team and module leader for disability support. 3. Any student requiring an extension or deferral should follow the university process as outlined here. 4. The University cannot take responsibility for any coursework lost or corrupted on disks, laptops or personal computer. Students should therefore regularly back-up any work and are advised to save it on the University system. 5. If there are technical or performance issues that prevent students submitting coursework through the online coursework submission system on the day of a coursework deadline, an appropriate extension to the coursework submission deadline will be agreed. This extension will normally be 24 hours or the next working day if the deadline falls on a Friday or over the weekend period. This will be communicated via your Module Leader. 6. Assignments that are more than 10% over the word limit will result in a deduction of 10% of the mark i.e. a mark of 60% will lead to a reduction of 6% to 54%. The word limit includes quotations, but excludes the bibliography, reference list and tables. 7. You are encouraged to check the originality of your work by using the draft Turnitin links on your Aula Web. 8. Collusion between students (where sections of your work are similar to the work submitted by other students in this or previous module cohorts) is taken extremely seriously and will be reported to the academic conduct panel. This applies to both courseworks and exam answers. 9. A marked difference between your writing style, knowledge and skill level demonstrated in class discussion, any test conditions and that demonstrated in a coursework assignment may result in you having to undertake a Viva Voce in order to prove the coursework assignment is entirely your own work. 10. If you make use of the services of a proof reader in your work you must keep your original version and make it available as a demonstration of your written efforts. 11. You must not submit work for assessment that you have already submitted (partially or in full), either for your current course or for another qualification of this university, unless this is specifically provided for in your assignment brief or specific course or module information. Where earlier work by you is citable, ie. it has already been published/submitted, you must reference it clearly. Identical pieces of work submitted concurrently will also be considered to be self-plagiarism. |
Marking Rubric
PG
| Mark band | Outcome | Guidelines |
| 90-100% Distinction | Meets learning outcomes | Distinction – Exceptional work with very high degree of rigour, creativity and critical/analytic skills. Mastery of knowledge and subject-specific theories with originality and autonomy. Demonstrates exceptional ability to analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Innovative research with exceptional ability in the utilisation of research methodologies. Demonstrates, creativity, originality and outstanding problem-solving skills. Work completed with very high degree of accuracy, proficiency and autonomy. Exceptional communication and expression demonstrated throughout. Student evidences the full range of technical and/or artistic skills. Work pushes the boundaries of the discipline and may be strongly considered for external publication/dissemination/presentation. |
| 80-89% Distinction | Distinction – Outstanding work with high degree of rigour, creativity and critical/analytic skills. Near mastery of knowledge and subject-specific theories with originality and autonomy. Demonstrates outstanding ability to analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Innovative research with outstanding ability in the utilisation of research methodologies. Work consistently demonstrates creativity, originality and outstanding problem-solving skills. Work completed with high degree of accuracy, proficiency and autonomy. Outstanding communication and expression demonstrated throughout. Student demonstrates a very wide range of technical and/or artistic skills. With some amendments, the work may be considered for external publication/dissemination/presentation | |
| 70-79% Distinction | Distinction – Excellent work undertaken with rigour, creativity and critical/analytic skills. Excellent degree of knowledge and subject-specific theories with originality and autonomy demonstrated. The work exhibits excellent ability to analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Innovative research with excellent ability in the utilisation of research methodologies. Work demonstrates creativity, originality and excellent problem-solving skills. Work completed with very consistent levels of accuracy, proficiency and autonomy. Excellent communication and expression demonstrated throughout. Student demonstrates a very wide range of technical and/or artistic skills. | |
| 60-69% Merit | Merit – Very good work often undertaken with rigour, creativity and critical/analytic skills. Very good degree of knowledge and subject-specific theories with some originality and autonomy demonstrated. The work often exhibits the ability to fully analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Very good research evidence and shows very good ability in the utilisation of research methodologies. Work demonstrates creativity, originality and problem-solving skills. Work completed with very consistent levels of accuracy, proficiency and autonomy. Very good communication and expression demonstrated throughout. Student demonstrates a wide range of technical and/or artistic skills. | |
| 50-59% Pass | Pass – Good work undertaken with some creativity and critical/analytic skills. Demonstrates knowledge and subject-specific theories with some originality and autonomy demonstrated. The work exhibits the ability to analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Good research and shows some ability in the utilisation of research methodologies. Work demonstrates problem-solving skills and is completed with some level of accuracy, proficiency and autonomy. Satisfactory communication and expression demonstrated throughout. Student demonstrates some of the technical and/or artistic skills. | |
| 40-49% Pass | Pass – Assessment demonstrates some advanced knowledge and understanding of the subject informed by current practice, scholarship and research. Work may be incomplete with some irrelevant material present. Sometimes demonstrates the ability to analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Acceptable research with evidence of basic ability in the utilisation of research methodologies. Demonstrates some originality, creativity and problem-solving skills but often with inconsistencies. Expression and presentation sufficient for accuracy and proficiency. Sufficient communication and expression with professional skill set. Student demonstrates some technical and/or artistic skills. | |
| 30-39% Fail | Fails to achieve learning outcomes | Fail – Very limited understanding of relevant theories, concepts and issues with deficiencies in rigour and analysis. Some relevant material may be present but be informed from very limited sources. Fundamental errors and some misunderstanding likely to be present. Demonstrates limited ability to analyse and apply concepts within the complexities and uncertainties of the subject/discipline. Limited research scope and ability in the utilisation of research methodologies. Limited originality, creativity, and struggles with problem-solving skills. Expression and presentation insufficient for accuracy and proficiency. Insufficient communication and expression and with deficiencies in professional skill set. Student demonstrates deficiencies in the range of technical and/or artistic skills. |
| 20-29% Fail – | Fail – Clear failure demonstrating little understanding of relevant theories, concepts, issues and only a vague knowledge of the area. Little relevant material may be present and informed from very limited sources. Serious and fundamental errors and virtually no evidence of relevant research. Fundamental errors and misunderstandings likely to be present. Little or no research with no evidence of utilisation of research methodologies. No originality, creativity, and struggles with problem-solving skills. Expression and presentation insufficient for accuracy and proficiency. Insufficient communication and expression and with serious deficiencies in professional skill set. Student has clear deficiencies in range of technical and/or artistic skills. | |
| 0-19% Fail | Fail – Clear failure demonstrating no understanding of relevant theories, concepts, issues and no understanding of area. Little or no relevant material may be present and informed from minimal sources. No evidence of ability in the utilisation of research methodologies. No evidence of originality, creativity, and problem-solving skills. Expression and presentation deficient for accuracy and proficiency. Insufficient communication and expression and with deficiencies in professional skill set. Student has clear deficiencies in range of technical and/or artistic skills. |
UG
| Mark band | Outcome | Guidelines |
| 90-100% 1st | Meets learning outcomes | 1st – Exceptional work with very high degree of understanding, creativity and critical/analytic skills. Evidence of exceptional research well beyond minimum recommended using a range of methodologies. . Exceptional understanding of knowledge and subject-specific theories. Demonstrates creative flair, a high degree of originality and autonomy. Exceptional ability to apply learning resources. Demonstrates well-developed problem-solving skills. Work completed with very high degree of accuracy and proficiency and autonomy. Exceptional communication and expression, significant evidence of professional skill set. Student evidences deployment of a full range of exceptional technical and/or artistic skills. |
| 80-89% 1st | 1st – Outstanding work with high degree of understanding, creativity and critical/analytical skills. Outstanding understanding of knowledge and subject-specific theories. Evidence of outstanding research well beyond minimum recommended using a range of methodologies. Demonstrates creative flair, originality and autonomy. Outstanding ability to apply learning resources. Demonstrates clear problem-solving skills. Assessment completed with high degree of accuracy and proficiency and high-level of autonomy. Outstanding communication and expression, evidence of professional skill set. Student evidences deployment of a full range of technical and/or artistic skills. | |
| 70-79% 1st | 1st – Excellent work with clear evidence of understanding, creativity and critical/analytical skills. Thorough research well beyond the minimum recommended using methodologies beyond the usual range. Excellent understanding of knowledge and subject-specific theories with evidence of considerable originality and autonomy. Excellent ability to apply learning resources. Demonstrates consistent, coherent substantiated argument and interpretation. Demonstrates considerable creativity and clear problem-solving skills. Assessment completed with accuracy, proficiency, and considerable autonomy. Excellent communication and expression, some evidence of professional skill set. Student evidences deployment of a highly developed range of technical and/or artistic skills. | |
| 60-69% 2:1 | 2:1 – Very good work demonstrating strong understanding of theories, concepts and issues with clear critical analysis. Thorough research, using established methodologies accurately, beyond the recommended minimum with little, if any, irrelevant material present. Very good understanding, evidencing breadth and depth, of knowledge and subject-specific theories with some originality and autonomy. Very good ability to apply learning resources. Demonstrates coherent substantiated argument and interpretation. Demonstrates some originality, creativity and problem-solving skills. Work completed with accuracy, proficiency, and autonomy. Very good communication and expression with evidence of professional skill set. Student has a thorough command of a good range of technical and/or artistic skills. | |
| 50-59% 2:2 | 2:2 – Good understanding of relevant theories, concepts and issues with some critical analysis. Research undertaken accurately using established methodologies, enquiry beyond that recommended may be present. Some errors may be present and some inclusion of irrelevant material. Good understanding, with evidence of breadth and depth, of knowledge and subject-specific theories with indications of originality and autonomy. Good ability to apply learning resources. Demonstrates logical argument and interpretation with supporting evidence. Demonstrates some originality, creativity and problem-solving skills but with inconsistencies. Expression and presentation mostly accurate, proficient, and conducted with some autonomy. Good communication and expression with appropriate professional skill set. Student consistently demonstrates a well-developed range of technical and/or artistic skills. | |
| 40-49% 3rd Class | 3rd – Meet the learning outcomes with a basic understanding of relevant theories, concepts and issues.. Demonstrates an understanding of knowledge and subject-specific theories sufficient to deal with concepts. Assessment may be incomplete and with some errors. Research scope sufficient to evidence use of some established methodologies. Some irrelevant material likely to be present. Basic ability to apply learning resources. Demonstrates ability to devise and sustain an argument. Demonstrates some originality, creativity and problem-solving skills but with inconsistencies. Expression and presentation sufficient for accuracy and proficiency. Sufficient communication and expression with basic professional skill set. Student demonstrates technical and/or artistic skills. | |
| 30-39% Fail | Fails to achieve learning outcomes | Fail – Very limited understanding of relevant theories, concepts and. Little evidence of research and use of established methodologies. Some relevant material will be present. Deficiencies evident in analysis. Fundamental errors and some misunderstanding likely to be present. Limited ability to apply learning resources. Student’s arguments are weak and poorly constructed. Very limited originality, creativity, and struggles with problem-solving skills. Expression and presentation insufficient for accuracy and proficiency. Insufficient communication and expression and with deficiencies in professional skill set. Student demonstrates some deficiencies in technical and/or artistic skills. |
| 20-29% Fail | Fail – Clear failure demonstrating little understanding of relevant theories, concepts and issues. Minimal evidence of research and use of established methodologies and incomplete knowledge of the area. Serious and fundamental errors and aspects missing Little evidence of ability to apply learning resources. Students arguments are very weak and with no evidence of alternative views. Little evidence of originality, creativity, and problem-solving skills. Expression and presentation deficient for accuracy and proficiency. Insufficient communication and expression and with deficiencies in professional skill set. Student demonstrates a lack of technical and/or artistic skills. | |
| 0-19% Fail | Fail – Inadequate understanding of relevant theories, concepts and issues. Complete failure, virtually no understanding of requirements of the assignment. Material may be entirely irrelevant. Assessment may be fundamentally wrong, or with major elements missing. Not a serious attempt. No evidence of research. Inadequate evidence of ability to apply learning resources. Very weak or no evidence of originality, creativity, and problem-solving skills. Students presents no evidence of logical argument and no evidence of alternative views. Expression and presentation extremely weak for accuracy and proficiency. Communication and expression very weak and with significant deficiencies in professional skill set. Student evidences few or no technical and/or artistic skills |
