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• W2140893411 abstract "The problem of energy efficiency is one of the most relevant at the moment in the industry due to new regulations at national and international levels. This new regulations are trying to protect the environment and are aiming to do a more rational use of the resources. In general, the majority of the hydraulic machines, that are operating, are part of a complex system of which the hydraulic machine is a basic link. Because of this, it is a requirement that the machine should be reliable, have a high index of availability and be easy to operate. Summarizing it is a requirement that this basic link is simple and not a source of problems. Taking these requirements into account and considering the non-linear and uncertain nature of the hydraulics, the original designs, which were made during the past century, were made oversizing the capacities of the machine to avoid complications during operation; of course, when those designs were made consume of energy was not a priority. However once that the focus is on energy efficiency, there is a need to give a second view to the design and to how those complications were avoided. Fortunately, nowadays the technology has advanced and the Engineer has today a bigger set of tools to accomplish this job. The present work is focused on the problem of keeping a desired pressure in a hydraulic system which is continuously disturbed by pressure losses due to leakage or liquid displacement (load flow). Traditionally this problem is solved with the help of a constant source of flow that is much bigger than the flow losses. A valve regulates the flow of the source that goes inside the system and by regulating the flow the pressure is regulated. This solution gives the desired performance and for this reason is widely used; however, the disadvantage is that, in order for this solution to work, the flow source has to be operative and at maximum flow always. This require a lot of energy and contaminates more. Thinking in energy efficiency there are now solutions that employ variable flow sources that provide just the right amount of flow when it’s needed, this approach reduces considerably the energy used and the contamination generated. This solution is known as Speed Variable Pump or SvP. To accomplish its goal, the SvP needs to compensate the flow losses; currently this compensation is done using a complex control scheme PID-PI which requires the tuning of more than ten parameters by the final user. The main contribution of the present work is the design and implementation of" @default.
• W2140893411 created "2016-06-24" @default.
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• W2140893411 date "2011-01-01" @default.
• W2140893411 modified "2023-09-26" @default.
• W2140893411 title "Observación y control por modos deslizantes de una máquina de presion." @default.
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