Research on Iterative Learning Control of MLC Based on Cross-Coupling

Abstract

According to requirements of the leaves position precision control of multi-leaf collimator (MLC) in the process of radiotherapy, the structure and working principle of the multi-leaf collimator of conformal radiation therapy apparatus was described. Firstly, the model of PID iterative learning control was described, and the model of iterative learning control based on cross-coupling was proposed to reduce the position error of MLC leaves. The experimental results show that this method can meet the needs of the control precision of the leaves’ position of the multi-leaf collimator.