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Konstruktion av PID-reglerad motorstyrning
Linköping University, Department of Electrical Engineering.
2008 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Denna högskoleavhandling beskriver konstruktionen av ett system vars funktion är att PID-reglera ett linjärställdon kopplad till venturi. Syftet har varit att få fram en reglering på venturin så att förutsättningarna förblir desamma vid mätning av olika temperaturer och lufttryck i en testrigg. Denna testrigg används för att utveckla produkten Varivent som används för att uppfylla högre miljökrav på förbränningsmotorer.

I arbetet beskriver jag de olika krav som funnits för att bygga det nya systemet, dessa var ingångar, utgångar, mikroprocessor, reglering,

kommunikation samt övriga krav. Jag diskuterar de svårigheter och möjligheter som är förknippade med kraven och tar även upp de komponenter jag använt samt deras egenskaper. Det svåraste momentet har varit PID-regulatorn som både varit en viktig och en svårlöslig del i konstruktionen av systemet. Slutligen diskuterar jag resultatet där jag, i en analys, kan se att jag kunde underlättat för mig själv med andra angreppsvinklar men att det slutliga resultatet ändå blivit mycket tillfredsställande.

Abstract [en]

This bachelor thesis describes the design of a unit the function of which is to regulate, using PID controls, a linear mechanical adjusting screw coupled to a variable venturi flow system. The design criteria has been to create, in a test rig, a venturi control system that gives an output that is not affected by changes in either air temperature or pressure. The test rig is used for the development of Varivent, a product used to reduce the environmental impact of the internal combustion engine. In my thesis work I describe the various and necessary elements of the project. These can be termed inputs, outputs, microprocessors, regulators and communicators. I discuss the difficulties and possibilities associated with the design criteria and mention the components used and their different attributes. The most challenging part of the project has been the design of the PID regulator, which, whilst being the heart of the system, has also been the most difficult part of the system to design. Finally I discuss my results where, in an analysis, I see that I could have made things easier for myself had I approached the problems in other ways but that the final result was, despite this, very satisfactory.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2008. , 35 p.
Keyword [en]
Aerodynamic body, H-bridge, microcontroller, PID-regulator, PWM, RS422, venturi
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-11317ISRN: LiTH-ISY-EX-ET--08/0317--SEOAI: oai:DiVA.org:liu-11317DiVA: diva2:17726
Presentation
(English)
Uppsok
teknik
Supervisors
Examiners
Available from: 2008-03-18 Created: 2008-03-18

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CiteExportLink to record
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Citation style
  • apa
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