Control system design of water filter test bench
Sahamies, Juuso (2022)
Sahamies, Juuso
2022
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-202203294100
https://urn.fi/URN:NBN:fi:amk-202203294100
Tiivistelmä
Hydraulic filters are installed to hydraulic systems to decrease the amount of dirt particles. These filters are tested in test benches according to measuring standards. Test results will give better understanding of filters properties, such as filtration ratio and pressure drop. This information can be used for a product development and as an info for the costumers.
A new water filter test bench is to be built for Parker. A well-designed control system will be in key role for the use of the test bench and for the success of measuring events. The first model of test bench’s control system was created in this thesis. The control system was modelled in Unified Modelling Language’s state machine diagrams, which can be utilized later in the creation of the PLC program. This work can be seen as constructive research and it was commissioned by Parker Hannifin Manufacturing Finland Oy.
The work part started by designing the hydraulic circuit. After the hydraulic circuit was complete and all the needed components of the control system were defined, control system design began. Main states of the control system were modelled first. These states defined which of the components could be actuated during each state and which sensor/state data would be shown to the user by the Human-machine interface. Components’ state machine diagrams were modelled after this. These diagrams defined every possible scenario where a certain component could be used. The actuations were possible only if the set conditions for the action were true. These guards were set for the state changes so that the system would be safe to use, and unwanted action wouldn’t occur. Confidential parts of this thesis were omitted from this public version.
The result of this study was a model of a control system. It can be seen as the first prototype where all the critical functions of the control are defined. Several ideas for further development of the water filter test bench appeared during the work and they are explained in the discussion. Next step for this project would be the creation of a PLC program and its simulation. There the functionalities of the control system designed in this thesis could be tested and fixed if needed.
A new water filter test bench is to be built for Parker. A well-designed control system will be in key role for the use of the test bench and for the success of measuring events. The first model of test bench’s control system was created in this thesis. The control system was modelled in Unified Modelling Language’s state machine diagrams, which can be utilized later in the creation of the PLC program. This work can be seen as constructive research and it was commissioned by Parker Hannifin Manufacturing Finland Oy.
The work part started by designing the hydraulic circuit. After the hydraulic circuit was complete and all the needed components of the control system were defined, control system design began. Main states of the control system were modelled first. These states defined which of the components could be actuated during each state and which sensor/state data would be shown to the user by the Human-machine interface. Components’ state machine diagrams were modelled after this. These diagrams defined every possible scenario where a certain component could be used. The actuations were possible only if the set conditions for the action were true. These guards were set for the state changes so that the system would be safe to use, and unwanted action wouldn’t occur. Confidential parts of this thesis were omitted from this public version.
The result of this study was a model of a control system. It can be seen as the first prototype where all the critical functions of the control are defined. Several ideas for further development of the water filter test bench appeared during the work and they are explained in the discussion. Next step for this project would be the creation of a PLC program and its simulation. There the functionalities of the control system designed in this thesis could be tested and fixed if needed.