Abstract:There is growing interest in using electric motors as prime movers in mobile hydraulic systems. This increases the interest in so-called pump-controlled systems, where each actuator has its own drive unit. Such architectures are primarily appealing in applications where energy efficiency is important and electric recuperation is relevant. An issue with pump-controlled systems is, however, mode-switch oscillations which can appear when the pressure levels in the system are close to the switching condition. In t… Show more
“…Could it be an alternative also for a double acting asymmetric cylinder like the second boom of the crane? The properties of mode-switch oscillations in such a system are investigated and compared to those of a close circuit system in [14]. Both systems are found to suffer from oscillations, but a strategy of active hysteresis control during mode switching is proposed that lowers the oscillations.…”
The following publications are included in the thesis. They will be referred to by their Roman numerals. Apart from formatting changes and minor errata, they are reproduced in their original form.
“…Could it be an alternative also for a double acting asymmetric cylinder like the second boom of the crane? The properties of mode-switch oscillations in such a system are investigated and compared to those of a close circuit system in [14]. Both systems are found to suffer from oscillations, but a strategy of active hysteresis control during mode switching is proposed that lowers the oscillations.…”
The following publications are included in the thesis. They will be referred to by their Roman numerals. Apart from formatting changes and minor errata, they are reproduced in their original form.
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