Given the need to reduce greenhouse gas emissions, new energy-efficient solutions can be adopted for construction and agricultural machinery. Such a solution is digital hydraulic cylinder that uses several active areas constant pressure supply with which gradual variation of driving force obtained. Traditional systems have high energy losses due direct throttle flow through different valves. Th...

Investigations of attached partial cavitation are important because to prevent damages in hydrulic machinery and to reduce the costs. As expected computational fluid dynamics (CFD) methods have been developed for more than 40 years to understand this phenomenon and to improve the machinery designs, as pumps and hydraulic turbines. However, cavitation appears at high Reynolds numbers, so that, t...

Model-based diagnosis of technical systems requires both a simulation machinery and a logic calculus. The former is responsible for the system’s behavior analysis, the latter controls the actual diagnosis process. Especially when pursuing qualitative simulation, it makes sense to realize the simulation machinery with a logic calculus as well. Say, a qualitatively described hypothesis can direct...