Integrated approach to precision instrumentation: design, modeling, and experimental validation of a compliant mechanical amplifier for laser scalpel prototype

The authors propose the development of a three-degree-of-freedom hand vibration compensation device, featuring a compliant mechanical structure incorporating three stack-type piezoelectric actuators. Inspired by the Stewart-type mobile platform, the system employs this design to manipulate a laser beam in two directions. Moreover, it facilitates an optimal axial stroke, ensuring precise laser beam focusing. This paper details the comprehensive process, encompassing modeling, simulation, and experimental trials, of a compliant mechanical amplifier designed for powering an innovative laser scalpel prototype. The active tremor damping capability of the proposed system is thoroughly examined, shedding light on its potential applications in medical settings. The authors employed a mechatronic approach, integrating mathematical models, MATLAB simulations and finite element analysis (FEA). Mathematical models were utilized to capture the static deformation of the compliant mechanical structure, providing a theoretical foundation for the subsequent stages of development. MATLAB simulations were then conducted to validate and refine the theoretical models, ensuring their accuracy in representing the system's behavior under various conditions. To further enhance the robustness of the design, finite element analysis (FEA) was employed to validate the structural integrity and performance of the proposed device. This simulation tool allowed for a detailed examination of stress distribution, deformation patterns, and overall mechanical response, guiding refinements to optimize the system's functionality. Expanding upon this, the research underscores the significance of mitigating hand tremors in surgical procedures, emphasizing the practical implications of the developed device.