A novel analytical approach for compound bridge-type amplifiers considering the external compound loads and cross-coupling effect

• DOI: 10.1088/1402-4896/adc210
• Publication Date: 2025-03-18T22:54:38Z
• Authors: Linkang Wang; Zhicheng Song; Bai Chen; Jingjing You; Hongtao Wu
• Keywords: Bridge (graph theory)

Abstract Multi-degree-of-freedom (DOF) precision positioning stages (PPS) based on displacement amplifiers are commonly designed and used in engineering applications. However, the equivalent load cross-coupling effects these PPS can adversely impact kinematic performance of amplifiers, resulting a significant reduction accuracy. To this end, novel mathematical model has been developed chain-based compliance matrix (CMM) beam constraint model, enabling precise calculation amplification ratio input stiffness compound bridge-type amplifier (CBTA). Firstly, an analytical CBTA with asymmetric force characteristics CMM. A comparison existing models finite element analysis (FEA) results demonstrates that proposed offers higher computational accuracy than current models. Then, structural were derived using model. further validate effectiveness scalability method, XY PPS, CBTA, was investigated. Finally, correctness theoretical verified through FEA experimental validation. Taking into account cross-coupling, errors both found to be less 9.44% 9.52%, respectively. Therefore, provides new perspective for design application multi-DOF amplifiers.