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The X-ray detection technique is nondestructive techniques, and its principle is the premise of not damage the workpiece is detected, the detecting whether the workpiece internal defects, but can also determine defect detecting member of the specific location as well as the shape and size of such. Industrial production, raw materials, spare parts and weld all of the a lot of important equipment needed to carry out the necessary NDT X-ray detection technology in aviation, aerospace, weapons, chemical industry, metallurgy, shipbuilding, railways, and the nuclear industry and other wide range of application areas. The barrel parts X-ray detection machine-ray source system, detector system, mechanical motion systems, data acquisition systems, control systems and computer image processing system is composed of several parts. Designed for the requirements of the barrel parts batch detected special fixture, inspection station as well as the overall control scheme, taking into account the security of detection, the overall control system mainly includes a main control room, the inspection machine chamber, a main control panel, and a live table, etc.. Above design research, online detection of parts to achieve the purpose of safe and rapid detection of the defects, and can also guide the production process improvements based on test results. Scanning motion control plays a vital role in X-ray detection machine control system, its accuracy, stability and fast essentially on imaging quality. In this paper, the upper and lower control mode of the multi-axis motion control card of the IPC, IPC is responsible for the control of the entire system, and human-computer interaction interface and image processing; multi-axis motion control card specifically responsible for controlling the movement of each axis, it receives from IPC command, and then converted into a command corresponding instruction to each servo drive, servo drive control servo motor movement in order to achieve the movement required scanning. The control card also receives a feedback signal from the optical encoder or encoders, to form a closed-loop control, to ensure a high precision motion control. The basic requirements of the motion control stability, speed and accuracy. This article refers to the selected servo motor parameters, establish a servo motor and drive open-loop and closed-loop transfer function analysis the Bode diagram phase margin and amplitude margin, add new links or change a system these parameters, to achieve the optimization of the control parameters, allowing control to achieve stable, accurate, fast purpose.
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