TY - GEN
T1 - The research of structure parameter optimization process for a novel parallel radiotherapy bed
AU - Guo, Qiang
AU - Du, Zhijiang
AU - Zhang, Fengfeng
AU - Fan, Licheng
AU - Kuang, Shaolong
AU - Sun, Lining
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/9/2
Y1 - 2015/9/2
N2 - In order to guarantee the preoperative and intraoperative precise positioning demand of the radiotherapy bed in the radiation process, utilizing the advantages of parallel mechanism, in this paper, a parallel structure radiotherapy bed was designed to meet the demands of high positioning precision, high stiffness, high carrying capacity and flexible configuration space which could cover the shortage of the conventional radiotherapy bed. Firstly, this paper analyzed the precise workspace of the radiotherapy bed with kinematics inverse solved by vector algebra method and studied the influence of workspace by changing the rule of all parameters as well as finding the relationships between them in the condition that the size of the moving platform and the fixed platform were limited. Then, in order to meet the requirements of stability and security of the radiotherapy bed, considering the workspace and the forces on it, a new parameter optimization process was proposed with constructing the objective function of the Jacobian matrix condition number, the universe average of condition number and the fluctuation of condition number. The simulation analysis results demonstrated that the overall performance of the radiotherapy bed was considerably improved with the smaller dimensions of the radiotherapy bed, the significantly reduced forces on the structure in the workspace and the smaller condition number of Jacobian matrix with uniform distribution in the whole workspace.
AB - In order to guarantee the preoperative and intraoperative precise positioning demand of the radiotherapy bed in the radiation process, utilizing the advantages of parallel mechanism, in this paper, a parallel structure radiotherapy bed was designed to meet the demands of high positioning precision, high stiffness, high carrying capacity and flexible configuration space which could cover the shortage of the conventional radiotherapy bed. Firstly, this paper analyzed the precise workspace of the radiotherapy bed with kinematics inverse solved by vector algebra method and studied the influence of workspace by changing the rule of all parameters as well as finding the relationships between them in the condition that the size of the moving platform and the fixed platform were limited. Then, in order to meet the requirements of stability and security of the radiotherapy bed, considering the workspace and the forces on it, a new parameter optimization process was proposed with constructing the objective function of the Jacobian matrix condition number, the universe average of condition number and the fluctuation of condition number. The simulation analysis results demonstrated that the overall performance of the radiotherapy bed was considerably improved with the smaller dimensions of the radiotherapy bed, the significantly reduced forces on the structure in the workspace and the smaller condition number of Jacobian matrix with uniform distribution in the whole workspace.
KW - Evaluation index
KW - Parameter optimization
KW - Radiotherapy bed
KW - Workspace analysis
UR - https://www.scopus.com/pages/publications/84955286765
U2 - 10.1109/ICMA.2015.7237788
DO - 10.1109/ICMA.2015.7237788
M3 - 会议稿件
AN - SCOPUS:84955286765
T3 - 2015 IEEE International Conference on Mechatronics and Automation, ICMA 2015
SP - 1972
EP - 1977
BT - 2015 IEEE International Conference on Mechatronics and Automation, ICMA 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 12th IEEE International Conference on Mechatronics and Automation, ICMA 2015
Y2 - 2 August 2015 through 5 August 2015
ER -