The Motion Reference Unit (MRU) is an important component in the Ampelmann Operation B.V. systems. In order to assess the performance of different MRUs a test system is developed. By using a one Degree of Freedom rail, wave motions can be simulated in the sway, surge and heave direction of a ship. The test system is divided in three parts: hardware, software and MRU assessment. This thesis focuses on the software design and implementation of the system. It turned out that the software performed well enough for the test system. However, due to limited project time, not all designed functionality could be implemented.

In order to make offshore working conditions safer, Ampelmann B.V. builds platforms that stay stable by compensating for a ship’s motion. These platforms are controlled via motion reference units (MRUs). In order to test the performances of these MRUs, a linear motion MRU test setup was developed. The system was divided into three parts: hardware, software and MRU assessment. This thesis focuses on the design and implementation of the MRU assessment part and on testing MRUs with the complete prototype setup.
Ampelmann supplied the MRU with which the test were conducted. Validation tests have been done with a simulator and with the setup itself. Included in the assessment of the MRUs was the latency, signal-tonoise ratio and low-frequency behaviour, compared to a ground truth. Concluded from the tests was that the designed test setup has potential to accurately assess the performance of MRUs. There are some minor improvements to be made, but the overall system works as intended.