Innovative concept of increasing dynamic stiffness of compliant structures by mechatronic approach

This paper deals with an innovative mechatronic concept as means to significantly increase dynamic stiffness of mechanical structures. This increase results as a consequence of active force piezoactuation within the system. The system is controlled by a state space and sliding mode controller (SMC) and demonstrates a significant increase in dynamic stiffness of the target part of the structure. Presented concept aims at machine tools sector where mechanical compliance poses a major obstacle in achieving higher transfer and cutting speeds. Experimental test rig was built in order to verify the proposed concept.