A Reduced-Order Sliding-Mode Controller with an Auxiliary PLL Frequency Discriminator for Ultrasonic Electric Scalpels

📋 论文概要

该论文提出了一种用于超声电手术刀的降阶滑模控制器，并辅以PLL鉴频器，解决了压电换能器在不同手术功能间切换时功率调节精度和响应速度的挑战。

💡 主要创新点

• 提出降阶滑模控制器实现精确的机械功率调节，克服传统PWM小信号模型的局限性。
• 引入辅助PLL频率鉴频器，增强频率跟踪能力，支持快速切换手术功能。

🏷 关键词

📄 原文摘要

Intel, Hillsboro, OR 1 2 Piezoelectric transducer (PT) is an emerging energy-based technology for electrosurgery. With proper driving signals, the PT is utilized as an electric scalpel as shown in Fig. 21.4.1. It converts an electric signal into physical displacements for various electrosurgical functions, such as ultrasonic vessel sealing and dissecting [1]. The major challenge is to precisely regulate and quickly build a mechanical power up when changing between various surgical functions. The pulse-width modulation (PWM) mainly bases its design on a small signal model, thus, does not often fit for the large signal transient satisfactorily. This problem becomes even worse when changing load impedance due to the pressure upon the surgical tip. The sliding mode control (SMC) has reliable and fast performance for nonlinear large signal applications [2]. However, the SMC cannot be simply applied since the electric scalpel is significantly different from generic DC-DC

👥 作者与机构

Xiaosen Liu1,2, Adrian I. Colli-Menchi1, Edgar Sanchez-Sinencio1

Texas A&M University, College Station, TX