Control software plays an important role in industrial automation. Several domainspecific languages for control software implementation were designed and accepted in industry. Structured Text (ST)[1] is one of these languages. It is standardized by IEC 61131-3 standard and designed for programmable logic controllers. In this thesis two implementations of control software were developed: Java implementation as a reference model, and ST implementation as a test scenario for ST to C compiler. The functionality of both implementations was compared using the simulation model. It was concluded that resulting ST control software provides the same functionality as its reference model.

The thesis explains the development process of a production cell simulation in 3D implemented using Unity3D. The developed simulation communicates with existing control software and aims to test this control software in a 3D environment with physics simulation. The final result includes 3D models and also works as a visualization since it allows us to present the control system, and this visualization can be viewed using most web browsers. The thesis also includes a brief study and comparison between currently popular game engines to choose an appropriate option for this project.This is a project in collaboration with a local company (ARiSA) and has a high practical relevance.

Attitude and position determination systems in satellites are absolutely necessary to keep the desired trajectory. A very accurate, reliable and most used sensor for attitude determination is the star tracker, which orient itself in space by observing and comparing star constellations with known star patterns. For on earth tests of movements and docking maneuvers of spacecrafts, the new Spacecraft Maneuvering and Docking (SMD) facility at the chair of Aerospace Information Technology at the University of Würzburg has been built. Air bearing systems on the space ve- hicles help to create micro gravity environment on a smooth surface and simulate an artificial space-like surrounding. A new star tracker based optical sensor for indoor application need to be developed in order to get the attitude and position of the vehicles. The main objective of this thesis is to research on feasible star tracking algorithms for the SMD facility first and later to implement a star detection software framework with new developed voting methods to give the star tracker system its fully autonomous function of attitude determination and position tracking. Furthermore, together with image processing techniques, the software framework is embedded into a controller board. This thesis proposes also a wireless network system for the facility, where all the devices on the vehicles can uniquely communicate within the same network and a devel- opment of a ground station to monitor the star tracker process has also been introduced. Multiple test results with different scenarios on position tracking and attitude determination, discussions and suggestions on improvements complete the entire thesis work.

This diploma project summarizes a theoretical introduction regarding the issue of traffic light control. Further there is industrial communication discussed, where they are the Ethernet / IP protocol and the Modbus TCP protocol described more in detail. The following is the description of the Logix series programmable controllers. Then the diploma follows up with market research in order to find the most suitable development kit which is used as a trial prototype. Then it is concerned with a development kit with a communication module from AND-TECH company. Software was developed on them, more specifically a library for processor ports, memory and the Modbus TCP protocol. After verifying the functionality of the software, the hardware design was started. From the first site it is development kit and module and from the second site there are input and output circuits. There must be the assessment of the results found during the test operation. The end of the document describes incorrect steps that were repaired in hardware.