Level and Flow - Revision history

Paulsonnendecker: /* Introduction */

2020-12-15T07:51:01Z

‎Introduction

Paulsonnendecker: /* Previous Projects */

2020-12-15T07:49:25Z

‎Previous Projects

Wian Smit: /* Wian Smit, 2019 */

2019-11-22T04:13:54Z

‎Wian Smit, 2019

Wian Smit: /* Introduction */

2019-11-22T04:06:46Z

‎Introduction

Wian Smit: /* Introduction */

2019-11-22T04:04:38Z

‎Introduction

Wian Smit: /* Wian Smit, 2019 */

2019-11-22T04:03:05Z

‎Wian Smit, 2019

Wian Smit: /* Introduction */

2019-11-22T03:59:02Z

‎Introduction

Wian Smit: /* Introduction */

2019-11-22T03:58:42Z

‎Introduction

Wian Smit: /* Introduction */

2019-11-22T03:57:45Z

‎Introduction

Wian Smit: /* Introduction */

2019-11-22T03:56:20Z

‎Introduction

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 [[File:Pmc04flow_rig.JPG|400px|right|thumb|The level and flow control rig]]
 == Introduction ==
-This rig is an interactive level and flow system consisting of two manipulated variables and two controlled variables (2x2 MIMO system) that can be used to investigate a number of alternative APC configurations. This rig is very robust and easy to operate but does require some maintenance on occasion to ensure that all pipe connections and seals are in a good condition.
+The level and flow rig is set up in the process control laboratory and enables the user to investigate a simple interactive process where two control valves can be changed, while the level in the first tank and flow rate through in one section can be measured. This rig is an interactive level and flow system consisting of two manipulated variables and two controlled variables (2x2 MIMO system) that can be used to investigate a number of alternative Advanced Process Control configurations. This rig is very robust and easy to operate but does require some maintenance on occasion to ensure that all pipe connections and seals are in a good condition.
 Available and useful documentation for this rig includes:
-* The latest manual (Update in 2019) for configuring and operating the rig can be found [https://drive.google.com/drive/u/1/folders/1qdXLhK4me_BBqJNJQvolAX7O8MUKdBjf here].
+* The latest manual (Updated in 2020) for configuring and operating the rig can be found [https://drive.google.com/drive/u/1/folders/1WZZAh-HTs0DVyoU1ShjH6sA-2ItRIVDN here].
-* The latest diagrams of the rig can be found [https://drive.google.com/drive/u/1/folders/19zE0yqKaH7KwqEUk1z1irLhHWVoYiA6K here].
+* The diagrams of the rig can be found [https://drive.google.com/drive/u/1/folders/19zE0yqKaH7KwqEUk1z1irLhHWVoYiA6K here].
 == Previous Projects ==

← Older revision		Revision as of 07:49, 15 December 2020
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	This section describes some of the previous projects that was done on the level and flow rig to give you an idea of what has been done and where you can find the results obtained. Most important data contained in this section is information about what models were used/developed (if you want to reuse models) and what control strategies were employed (if you want to compare your results to something specific).		This section describes some of the previous projects that was done on the level and flow rig to give you an idea of what has been done and where you can find the results obtained. Most important data contained in this section is information about what models were used/developed (if you want to reuse models) and what control strategies were employed (if you want to compare your results to something specific).
		+
		+	=== Thabang Gaolefeloe, 2020 ===
		+
		+	'''Control Strategy:''' Model Based Control with National Instruments LabVIEW (2019 version). The software makes use of a Front Panel where control and feedback of the program was performed. The Block Diagram window consists of the actual development of the level and flow rig, divided into two. The data aquisition for the rig and a sub VI that consists of the model of the process with a controller. Control of the rig was through a PID controller, that is readily available in LabVIEW. Arbitrary control parameters were used in the development of the controller.
		+
		+	'''Modelling:''' Implementation of fundamental modelling method through first principles. Mass Balance of water was performed around a control volume (being the tank 04TK001) to come up with a first order differential equation that related the level of the tank to the inlet flowrate.
		+
		+	'''Maintenance:''' The rig requires little maintenance. The wiring from the junction box to the National Instruments CompactRIO needs to be properly cleaned and mounted on the wall. A computer station of the rig can also be built to ensure that there is not disturbance to the other rig. The flow meter needs to be properly calibrated because the gpm readings do not make sense.
		+
		+	'''Recommended Changes:''' Tuning of the orange control valve positioner is required. Currently the valve is not producing a wide enough range in the system's control. Implementing fuzzy logic to start and stop the two pumps to force the system into certain steady state conditions will improve the robustness of the rig control. This will require the installation of two additional relays in the control panel. Also, a further look into commissioning the client and server communications through Raspberry Pi should be investigated. The Pi is readily available and can then be explored.
		+
		+	'''Project Documentation:''' All the documentation of the project, can be found [https://drive.google.com/drive/u/1/folders/1ZbtCWB74K9dDyqoO_KihgM86MwktzlOw here].
		+

	=== Wian Smit, 2019 ===		=== Wian Smit, 2019 ===

← Older revision		Revision as of 04:13, 22 November 2019
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	'''Recommended Changes:''' More tuning of the orange control valve positioner is required. Currently the valve is not producing a wide enough range in the system's control. Implementing fuzzy logic to start and stop the two pumps to force the system into certain steady state conditions will improve the robustness of the MPC. This will require the installation of two additional relays in the control panel (and using two more outputs on the OPTO22 module).		'''Recommended Changes:''' More tuning of the orange control valve positioner is required. Currently the valve is not producing a wide enough range in the system's control. Implementing fuzzy logic to start and stop the two pumps to force the system into certain steady state conditions will improve the robustness of the MPC. This will require the installation of two additional relays in the control panel (and using two more outputs on the OPTO22 module).
		+
		+	'''Project Documentation:''' All the documentation, experimental data, and software developed during this project, can be found [https://drive.google.com/drive/u/1/folders/1O6G7cUIRA4gNSzfaRTKnwVpskbnz9JYe here].

	=== Michael Stephens, Edgar Whyte and Neill Herbst, 2016 ===		=== Michael Stephens, Edgar Whyte and Neill Herbst, 2016 ===

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 This rig is an interactive level and flow system consisting of two manipulated variables and two controlled variables (2x2 MIMO system) that can be used to investigate a number of alternative APC configurations. This rig is very robust and easy to operate but does require some maintenance on occasion to ensure that all pipe connections and seals are in a good condition.
-- The latest manual (Update in 2019) for configuring and operating the rig can be found [https://drive.google.com/drive/u/1/folders/1qdXLhK4me_BBqJNJQvolAX7O8MUKdBjf here].
+Available and useful documentation for this rig includes:
 == Previous Projects ==

@@ Line 3: / Line 3: @@
 This rig is an interactive level and flow system consisting of two manipulated variables and two controlled variables (2x2 MIMO system) that can be used to investigate a number of alternative APC configurations. This rig is very robust and easy to operate but does require some maintenance on occasion to ensure that all pipe connections and seals are in a good condition.
-The latest manual (Update in 2019) for configuring and operating the rig can be found [https://drive.google.com/drive/u/1/folders/1qdXLhK4me_BBqJNJQvolAX7O8MUKdBjf here].
+- The latest manual (Update in 2019) for configuring and operating the rig can be found [https://drive.google.com/drive/u/1/folders/1qdXLhK4me_BBqJNJQvolAX7O8MUKdBjf here].
 == Previous Projects ==

← Older revision		Revision as of 04:03, 22 November 2019
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	'''Models:''' Linear FOPDT transfer function matrix. Reasonable accuracy (for the specific steady state condition).		'''Models:''' Linear FOPDT transfer function matrix. Reasonable accuracy (for the specific steady state condition).
		+
		+	'''Maintenance:''' The rig required very little maintenance. The level sensor wiring was not connected properly, and revision along the complete line revealed a loose connection that was fixed. The flow meter was cleaned to ensure less noise and accuracy when sensing flow. There were two leaks on the piping surrounding the flow meter and pressure gauge. These leaks were repaired.

	'''Recommended Changes:''' More tuning of the orange control valve positioner is required. Currently the valve is not producing a wide enough range in the system's control. Implementing fuzzy logic to start and stop the two pumps to force the system into certain steady state conditions will improve the robustness of the MPC. This will require the installation of two additional relays in the control panel (and using two more outputs on the OPTO22 module).		'''Recommended Changes:''' More tuning of the orange control valve positioner is required. Currently the valve is not producing a wide enough range in the system's control. Implementing fuzzy logic to start and stop the two pumps to force the system into certain steady state conditions will improve the robustness of the MPC. This will require the installation of two additional relays in the control panel (and using two more outputs on the OPTO22 module).