Hatch cover systems are usually tailored to some extended. This means that performance requirements for control system vary in projects. Combination of mechanical models and hydraulic system simulation tools improves system design accuracy compared to traditional methods while it also brings previously unavailable information of system behaviour visual in design phase.


New set of tools for hatch cover hydraulic system design for new building projects was developed. The new toolset consist of hydraulic system simulation model and methods to connect simulation environment with mechanical design models. The new toolset has improved design accuracy in terms of calculating operation times and it can be also used for analysing system dynamics as well as visualising the results.


Traditional design methods are based on rough simplifications of physical phenomena and only capable to analyse hydraulic system in static conditions such as constant load force and constant speed. They also lack information of system dynamics. Therefore effects of changing operation point and system dynamics in operation time cannot be analysed in design phase using traditional tools.

The goal of the project was to improve design accuracy and disclose the blind spots in old methods. More accurate calculation of operation time was put on high priority because it is the number one customer demand for control systems. Simulation tools respond well these demands and they also have lot of potential for future development.


New tools have been used in several pilot projects in parallel with traditional design tools. The tool has proven to be most useful in one-off projects where system is previously totally unknown. In those cases the visualisation of design results is highly appreciated. The tools have also been used for optimisation of repeat project designs. Future actions will concentrate on measurements and verifications of the pilot projects and further development of the tools such as more detailed analyses of effects of temperature changes.


Marko Perukangas, MacGregor FIN Oy, Cargo Stowage and Securing
Esa Mäkinen, Tampere University of Technology, Department of Intelligent Hydraulic and Automation


MacGREGOR FIN Oy, Tampere University of Technology


Author missing

Marko Perukangas