Abstract
Variable displacement motors fed by an impressed pressure through a pressure net require a closed loop control for stable operation.
The presented paper focuses recent research results of the speed controlled motor [9]. The linear control theory allows an easy design of the controller. In real applications operating points will vary due to changing pressures in the pressure net as Nvel 1 as changing inertias of the load. It is shown how these changes affect the performance of the speed control.
Suitable identification for the inertia is suggested and performance results by adaption techniques are demonstrated. such as on-line parameter adaption. fuzzy parameter adaption and fuzzy control.
