| Abstract |
The paper presents the principles of estimating non-measurable state variables and external torque load in the drives with elastic motor shaft (two mass system). In many drive systems resilient couplings between the motor and processing machine, caused by elastic shafts and gears are often unavoidable. General rules of state and disturbance observers design are given. Besides, they have been applied to the drive system with elastic shaft. It is only the possibility of electromechanic torque generated by the motor and speed of motor shaft measurements that is discussed. Schematic diagrams of the drives system with elastic shaft and appropiate diagrams of state and disturbance (i.e. external torque load) observers are shown. The proposed observer could be used for correcting drive control to minimize electromechanical oscillations in a variable-speed drive system, which are caused by elasticity of mechanical connection. |
