Industrial technology is confronted with the constant demands for a reduction in investment and operating costs. Especially hydraulic power units as a core element for supply of flow and pressure for hydraulic actuation systems have a big influence by minimization of the required oil quantity used as well as by optimizing the targeted fluid condition. In addition to the reduction in the required size and weight, the cost of steel fabrications can also be significantly reduced by a smaller tank and the oil quantity during initial filling and maintenance can be reduced. With the innovative engineering-package “myCro” presented here, these advantages can be exploited by the customer.

Model-based control and regulation concepts will become increasingly important due to their specific advantages, for example in respect of performance, stability, consideration of nonlinearities etc., for hydraulic drives in particular. The fundamental prerequisite for their application is sufficiently precise knowledge of the system's response characteristic. The prerequisite for their acceptance, however, is the availability of computer-supported tools, methods and algorithms, which enable a case-specific identification and controller design. This article presents a concept for achieving these goals on the basis of an innovative nonparametric identification method, which has proved to be extremely efficient in initial applications.

This paper presents a Dynamic High-Torque Test Stand with hydrostatic drive technology. The topics
discussed within the scope of this paper are the mechanical design and the hydraulic characteristics as well
as, detailed solutions implemented in this test rig using innovative technology. The evaluation methods
used to determine the test specimen properties are also described in more detail.

Rising electricity costs are forcing machine builders and plant operators to find solutions for how energyintensive
machines can be operated and produce more efficiently. Large potentials lie in the drive technology
used. The example of the electro-hydrostatic drive concept for the ring rolling process demonstrates how a
higher productivity with minimized power consumption and at the same time simplified and cost-effective
installation brings competitive advantages. Together with Moog GmbH, SMS group GmbH has developed a new
generation of ring rolling machine, the RAW ecompact, with a modern electro-hydrostatic drive concept.