大惯量质子治疗旋转机架定位控制技术  

Positioning Control Technology of Large Inertia Gantry for Proton Radiotherapy

作　　者：孙恺文 龚时华[1] 蔡俊琼 SUN Kaiwen;GONG Shihua;CAI Junqiong(School of Mechanical Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学机械科学与工程学院,湖北武汉430074

出　　处：《电气传动》2023年第3期77-81,共5页Electric Drive

基　　金：国家重点研发计划(2016YFC0105306);湖北省重点研发计划项目(2021BCD005)。

摘　　要：旋转机架是质子放疗设备的重要组成部分,其主要特点是质量大、尺寸大、转动惯量大,运行时需要保证机架平稳加减速启停及精准定位。针对旋转机架的定位控制需求,对控制系统的硬件、软件部分进行了选型、设计,研究了系统的控制模型,并进行了参数整定,开发了一套基于PLC的质子治疗旋转机架定位控制系统。现场试验结果表明:开发的质子治疗旋转机架定位控制系统能够保证旋转机架在-180°~180°角度范围、转速1 r/min的条件下,角度定位精度达到0.011 3°,满足质子放疗设备的工作要求。Gantry is an important part of proton radiotherapy equipment. Its main features are its large mass,large size and large moment of inertia. It is necessary to ensure the smooth acceleration and deceleration and precise positioning of the gantry. In response to the positioning control requirements of the gantry,the hardware and software parts of the control system were selected and designed,the control model of the system was studied,the parameters were adjusted,and a PLC-based proton therapy gantry positioning control system was developed. Field test results show that the developed proton therapy gantry positioning control system can ensure that the gantry has an angular positioning accuracy of 0.011 3° under the conditions of an angle range of-180° ~180° and a rotation speed of 1 r/min,which satisfies the work requirements for proton radiotherapy equipment.

关 键 词：质子放疗设备 大惯量负载 旋转机架 定位控制 

分 类 号：TM28[一般工业技术—材料科学与工程]