Research And Design Of Medical Shaver System Based On STM32

The medical shaver system is an important surgical equipment in the medical field.Due to its advantages such as small incisions,fast recovery,and fewer complications,it has been widely used in surgical procedures such as neurosurgery,otolaryngology,and orthopedics.In the foreign market,the technology related to medical shaver systems has become mature.However,in the domestic market,it has become an obstacle to promote these systems in hospitals due to the lack of manufacturers,high after-sales costs,and long repair time.Therefore,in order to solve the problem of the scarcity of domestically produced medical shaver systems,this thesis conducts research and designs a medical shaver system.The main contents of this thesis are as follows:1.Based on the working principle,internal structure,and functional requirements of the control system of the medical shaver system,the overall scheme of the medical shaver system is designed,and the analysis of important hardware selection equipment is carried out.2.Using the handle brushless DC motor as the controlled object,a mathematical model of the handle motor in the two-phase/three-phase coordinate system is established.A handle motor controller based on the vector control strategy is designed.The speed loop of the controller uses sliding mode control to replace the traditional PI speed loop control to reduce the output fluctuation of the speed loop.At the same time,the current loop uses predictive current control to replace the traditional PI current loop control to improve the response speed of the system when disturbed.Simulation results show that compared with the traditional PI control method,under this control method,the overshoot of the handle motor during start-up is smaller and the speed accuracy during normal operation is higher.3.Using Altium Designer and Protel99 SE as the development platform,the hardware circuit of the medical shaver system is designed,including a power circuit,a three-phase drive inverter circuit,a current acquisition circuit,a drip circuit,an overcurrent protection circuit,and a foot switch circuit.Using Keil u Vision5 and Visual TFT software as the development platform,the motor control software and human-machine interface design of the medical shaver system are completed,and the working process of each software module is analyzed.4.A prototype of the medical shaver system is built.After testing the position sensor,terminal voltage,phase voltage waveform,and communication function of the LCD touch screen of the designed motor drive system,the stability of the prototype in different operation modes is verified through experiments,and the speed accuracy of the prototype is recorded.The test results show that the designed handle motor controller can improve the control performance of the system,meet the design parameters,and verify the feasibility and rationality of the control system.