Design And Implementation Of Multi-axis Control System For Industrial Computed Tomography

As one of the most advanced non-destructive detection technology，IndustrialComputed Tomography has been widely used in many fields. With the development ofCT technology, the requirements for CT image precision and imaging speed are gettinghigher and higher. Responsely, as a key part of the industrial CT, the motion controlsystem has to be designed to meet the requirments, for its single-axis positioning anddual-axis synchronous control performance have a direct impact on the imaging results.Currently, due to the restriction in control mode, the domestic motion control system isdifficult to improve its synchronization control accuracy, real-time response andmulti-axis motion control expansion. To solve these problems, and in combination withthe actual demands for industrial CT, the optimized design of CT multi-axis controlsystem is carried out in this paper based on SIMOTION D.Firstly, the requirments of motion control during CT and DR scan is discussed,which may vary as scan manner and mechanical system changes. In addition, someother functional demands, scuh as power management, detector control, HMI designeare also concerned. In response to all these needs, the feasibility of control systemdesign using SIMOTION D445-2as core controller is demonstrated.Then, Comparing to the existing industrial CT motion control system, the paperresearched the optimal design based on SIMOTION. The optimal design of the controlsystem is mainly reflected in the control system architecture, communications,multi-axis motion control, synchronization control, program execution. Hardwaredesign started from modules selection, by calculating the actual load torque and speedneeds, fulfills the selection of the motor in Sizer. On this basis, select the appropriatemotor driver, power supply modules and others, designed the power supply for allthese modules and complete the hardware configuration in SCOUT. Based onhardware design, the paper also analyzed the software implementation of the motioncontrol system. TCP communication, single axis and dual-axis synchronized motioncontrol, acquisition synchronization are the key points. Comparing with existingmotion control system, the system desigened in this paper has a higher degree ofmodularity and better real-time response.Finally, by application and test on CT system, the experimental measurementsalong with CT scan and DR imaging results, demonstrate the control system designed of this paper has high precision in multi-axis motion control, as well as real-timeresponse and reliability, and can be widely applied in industrial CT.