MECH4424 Measurement and Noise

Credit
6 points
Offering
(see Timetable)

If this unit does not have an online alternative, then students who are presently unable to enter Western Australia and whose studies would be delayed by an inability to complete this unit, should contact the unit coordinator (details given on this page) to ascertain, on an individual case-by-case basis, if alternate arrangements can be made to support their study in this unit.

AvailabilityLocationMode
Semester 2UWA (Perth)Face to face Predominantly face-to-face. On campus attendance required to complete this unit. May have accompanying resources online.
Semester 2UWA (Perth)Online timetabled 100% Online Unit. NO campus face-to-face attendance is required to complete this unit. All study requirements are online only. Unit includes some synchronous components, with a requirement for students to participate online at specific times.
Content
This unit covers concepts relating to measurement and noise, enabling students to understand the issues required to achieve high-quality measurements. Students understand issues such as accuracy, precision, repeatability, calibration, uncertainty and noise. Measurements from a range of sensors (mechanical, optical, electrical) are introduced and subsequent signal conditioning (operational amplifiers, instrumentation amplifiers) are addressed with the aim of maximising signal quality. Statistical methods are discussed to better understand noise processes and how noise can be minimised. Methods to improve signal quality (signal to noise ratio) are discussed. Measurement signal and noise are analysed in both the time and frequency domain to better understand the connection between two domains and the importance of measurement bandwidth. Sampling is reviewed to understand the impact of moving from continuous-time (CT) and discrete-time (DT), including discussion of the Nyquist rate and aliasing. The conversion between the analogy to digital domains including CT-DT, system transfer functions, spectral analysis (discrete Fourier transform, discrete-time Fourier transform) and the construction of finite and infinite impulse response filters to reduce noise is discussed.
Outcomes
Students are able to (1) explain measurement concepts obtained through team-based learning; (2) extract critical information from instrumentation specifications to enable high quality experimental design; (3) collect, understand and manipulate data to achieve high-quality measurements; (4) present and analyse data (numerically and in graphical form) in a manner that includes the uncertainty associated with the measurement; (5) move between the time and frequency domains in the process of understanding measurements and minimise noise; (6) critically analyse and assess instrumentation characteristics that affect data collection and measurement; and (7) use relevant instrumentation specifications to enable high quality experimental design.
Assessment
Indicative assessments in this unit are as follows: (1) laboratories; (2) quizzes; and (3) final examination. Further information is available in the unit outline.

Supplementary assessment is only available in this unit in the case of a student who has obtained a mark of 45 to 49 and is currently enrolled in this unit, and it is the only remaining unit that the student must pass in order to complete their course.
Unit Coordinator(s)
Associate Professor Adrian Keating
Unit rules
Prerequisites:
enrolment in the Bachelor of Automation and Robotics and CITS1001 Software Engineering with Java and ENSC3001 Mechanisms and Machines, or enrolment in the Master of Professional Engineering (Mechanical Engineering specialisation) or the Master of Renewable and Future Energy
Advisable prior study:
CITS2401 Computer Analysis and Visualisation and ENSC3001 Mechanisms and Machines
Contact hours
lectures/information sessions: 3 hours per week; practical classes: 1 hour per week; labs: 2 hours per week
Note
It is recommended that students are familiar with the Microsoft Excel spreadsheet program as this program will be used to perform calculations in assessments/labs.
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  • Unit readings, including any essential textbooks, are listed in the unit outline for each unit, one week prior the commencement of study. The unit outline will be available via the LMS and the UWA Handbook one week prior the commencement of study. Reading lists and essential textbooks are subject to change each semester. Information on essential textbooks will also be made available on the Essential Textbooks. This website is updated regularly in the lead up to semester so content may change. It is recommended that students purchase essential textbooks for convenience due to the frequency with which they will be required during the unit. A limited number of textbooks will be made available from the Library in print and will also be made available online wherever possible. Essential textbooks can be purchased from the commercial vendors to secure the best deal. The Student Guild can provide assistance on where to purchase books if required. Books can be purchased second hand at the Guild Secondhand bookshop (second floor, Guild Village), which is located on campus.