Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Implement-by-wire control of electrohydraulic closed center systems for mobile equipment applications
Digitally controlled electro-hydraulic (EH) closed centre valves and pressure sensing hydraulic pump systems have been quickly replacing the older generation of hydromechanically controlled (pilot actuated, mechanically controlled) open centre valves and fixed displacement pump systems in mobile equipment applications such as earth moving and construction equipment (i.e. wheel loaders, excavators, harvesters). With carefully designed and coordinated motion control systems, the power efficiency of the hydraulic system can be improved using closed centre EH systems to the point that significant fuel savings can be achieved. Furthermore, the machine behaviour can be optimised for different applications via real-time control software. Such capabilities were not possible in hydromechanically controlled systems. Energy efficiency, high performance, software based reconfigurability and reliability are the main objectives in design of EH systems for mobile equipment applications. The current state of art in construction equipment is such that there is no clear need for closed loop control of motion axes since the operator is already in the loop. Furthermore, the open loop control is more fault-tolerant against sensor failures. However, this may change as the construction equipment technology moves in the direction of autonomous vehicle operation.
Implement-by-wire control of electrohydraulic closed center systems for mobile equipment applications
Digitally controlled electro-hydraulic (EH) closed centre valves and pressure sensing hydraulic pump systems have been quickly replacing the older generation of hydromechanically controlled (pilot actuated, mechanically controlled) open centre valves and fixed displacement pump systems in mobile equipment applications such as earth moving and construction equipment (i.e. wheel loaders, excavators, harvesters). With carefully designed and coordinated motion control systems, the power efficiency of the hydraulic system can be improved using closed centre EH systems to the point that significant fuel savings can be achieved. Furthermore, the machine behaviour can be optimised for different applications via real-time control software. Such capabilities were not possible in hydromechanically controlled systems. Energy efficiency, high performance, software based reconfigurability and reliability are the main objectives in design of EH systems for mobile equipment applications. The current state of art in construction equipment is such that there is no clear need for closed loop control of motion axes since the operator is already in the loop. Furthermore, the open loop control is more fault-tolerant against sensor failures. However, this may change as the construction equipment technology moves in the direction of autonomous vehicle operation.
Implement-by-wire control of electrohydraulic closed center systems for mobile equipment applications
'Implement-by-wire'-Regelung von geschlossenen elektrohydraulischen Systemen für mobile Anwendungen
Cetinkunt, S. (Autor:in) / Pinsopon, U. (Autor:in) / Chen, C. (Autor:in) / Egelja, A. (Autor:in) / Anwar, S. (Autor:in)
2003
5 Seiten, 4 Bilder, 6 Quellen
Aufsatz (Konferenz)
Englisch