Implementation of a temperature control system

This project counts 40% of the final grade of the course.

Task

Each student group shall implement an application about temperature control of the air heater laboratory process.

The application must be implemented in LabVIEW, but each group can decide whether to use Matlab or Python to implement model adaptation to the real air heater (se under "Simulator" below).

Specifications: The application includes the following elements/functions:

Simulator: The system includes a simulator of the control system for designing and testing the control system. The simulator includes simulated measurement noise in the form of a uniformly distributed random signal have nearly the same variation as the real measurement (noise). A proper mathematical model to be used as the basis of the simulator is given on the home page of the air heater process. You must estimate good model parameters values from proper experiments, and to this end, the "gridding method" or "brute force optimization method" is used here, cf. Lesson 5 in the lecture plan. The following parameters of the air heater model should be estimated: Gain, time-constant, time-delay, and environmental temperature.
Campus students should perform their own experiments on the air heater for the model adaptation.
Online students can use data from an experiment that I have made. The logfile is airheater_logfile.lvm. The file containes three colums of data:

Time, t [s]
Control signal, u [V], manipulating the heating element.
Tube outlet temperature response, T_out [grader C].

A PI controller implemented from scratch, with the following features:

Manual/auto modes
Integrator anti windup
Reverse/direct modes

You must of course tune the controller. Select any method you prefer.

A lowpass measurement filter in the form of a time-constant filter implemented from scratch. The filter must be bumpless, i.e. the initial filter output shall not be zero, but equal to the (non-filtered) filter input. Select a proper time-constant of the filter.
Datalogging to file: Implement continuous logging (writing) of proper variables to a LVM-file which is a text-file containing the data as readable numbers (ASCII characters).

Select a proper sampling time (time step) of the control system.

Here are some useful guidelines for developing the system:

Draw a block diagram of the whole system defining the parts of the system including their functions (controller, simulator, process, data logfile writing). This block diagram should be included in the report.
Test each part of the system that you develop during the development so that you (and the teacher) are convinced that it works. You must plan these tests yourself. For example: You must verify that your measurement filter and your PI controller works correctly.
Use a simulator (not the real system) while developing and testing the program to check that the elements in your program (controller, filter, data logging, etc) work correctly. Only after the simulated system works as expected, you switch to the physical process (using it in stead of the simulated process).

Student groups

Students form groups of three or two themselves. Deadline for sending name of group member to the teacher is 16 am, Friday 25 August 2017. Both campus students and online students must establish groups! Online students should use the colloquium groups that are already established.

Group no.	Members	Class	Campus/ online	Assignment: LabVIEW programming	Assignment: Monitoring & control with LabVIEW	Lab gath- ering	Comments
G1	Gunhild M. Grimstvedt Sandra Breiland Erle Poulsen Grundt	EPE	Campus	ok ok ok	ok ok ok
G2	Ivan Dalibozhak Yana Mushka Eirik Bakko	EPE	Campus	ok ok	ok ok
G3	Jørund Martinsen Jon Arne Karlsen Preben Solvang	IIA	Campus	ok ok ok	ok ok ok
G4	Trond Åge Kvalø Itsaso Menchacatorre T. A. Tønnessen	IIA	Campus	ok ok ok	ok ok ok
G5	Phillip Ajer Marius Salen Jørgen Wolden	EPE	Campus	ok ok ok	ok ok ok
G6	Nitesh Thapa Sachin Ranjit Pravesh Khadka	EPE	Campus	ok ok ok	ok ok ok
G7	Tonje Gløsmyr Kristoffer Tøgard Vlas Dielov	EPE	Campus	ok ok ok	ok ok ok
G8	Stian Rasmussen Mikhail Lizhenin Alexander Lofthus	EPE IIA IIA	Campus	ok ok ok	ok ok ok
G9	Gaël Julien Pommé Iñaki F. R de Eguino Anh Khoa Tran	IIA	Campus	ok ok ok	ok ok ok
G10	N/A
G11	Maksym Artemiev Tetiana Bondarenko Madhusudhan Pandey	EPE	Campus	ok ok ok	ok ok ok
G12	N/A
G13	Jonas Hetland Mong Espen Gjestrum Engen Aleksander T. Poverud	EPE	Campus	ok ok ok	ok ok ok
G14	Upendra Agrahari Mohammad Khalili Prakash Chinnasamy	EPE	Campus	ok ok ok	ok ok ok
G15	Nelli Lizhenina Eivind S. Helganger	IIA-2017	Online	ok ok	N/A	- 22.11.17
G16	Dag Ola Straume Fredrik Ahmer Ailin Johansen.	IIA-2017	Online	ok ok ok	N/A	Spring-18 Spring-18 Spring-18
G17	Demjancenko, Sergej Kvåle, Svein Roar Svindseth, Alexander	IIA-2017	Online	- ok ok	N/A	- 26.4.18 26.4.18
~~G18~~ N/A
G19	Terje Eikerol Jonas Sørebø Courage Asemota Roar Elias Georgsen	IIA-2017 IIA-2017 IIA-2017 SE	Online	ok ok - ok	N/A	TE 26.4.18
G20	Joakim Dolven Frode Stedjan Lars Fosshaugen	SCE-2016	Online	- ok ok	N/A	- 22.11.17 22.11.17
G21	Hans Rune Lindberg Monica Martinsen Espen Thøgersen	IIA-2017	Online	ok ok ok	N/A	22.11.17 22.11.17 22.11.17
G22	Stein R. Rudshagen Sebastian Buch Lars Petter Haugland	IIA-2017	Online	ok ok ok	N/A	Spring-18 Spring-18 Spring-18

Project report

Each group writes a report (PDF) [template, but feel quite free to modify it] of the project work and makes a video lasting max. 10 min. presenting the application. Campus students should include practical application with the air heater. Online students can report simulated results only (they will demonstrate the practical application during the lab gathering on campus 21 Nov 2017). The deadline for uploading the report and the video, or a link to the video if it is stored outside Canvas, is 9 pm Sunday 19 Nov 2017. It is not required that the VI (your LabVIEW program) and other files are uploaded.

Demonstration and presentation

For the campus students, there is no final demonstration of the application, but the teacher and the teaching assistants will check "informally" that the groups are working well with the project on the laboratory.

The groups of online students will demonstrate the application with the real air heater during the lab gathering on campus 21 november 2017.

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Updated 27 April 2018 by Finn Aakre Haugen.