The Development Of A High Linear Acceleration Loading Machine

The mechanical environment plays an important role in the growth and development of cells,tissues and organs.The loading bioreactor plays a fundamental role in mechanics biology and tissue engineering.With the development of national aeronautics and astronautics technology and the deepening of mechanics and biology research,people have begun to focus on the impact of extreme mechanical environment on human body,tissues and organs,and how human body,tissues and organs deal with extreme mechanical environment.To study the impact of extreme mechanical environment on the human body,the most important step is to develop an experimental platform that can simulate the actual mechanical environment to the maximum extent.Extreme mechanical environment includes high acceleration(overweight),high pressure,overload etc,In this paper,a high linear acceleration loading machine was developed for high linear acceleration extreme mechanical environment.After testing,the high linear acceleration device can provide 0-10 G acceleration.In the load of 2Kg,acceleration of 10 G circumstances,running time greater than 30min;Through the design of different fixtures,it can perform high acceleration loading experiments on animals,cells,tissues,organs and so on.Firstly,we developed an overall plan of the experimental platform and selected the model of the main components.By studying the hydraulic,pneumatic,electromagnetic and other driving methods,in this paper,we chose the linear motor,which has the advantages of high acceleration,high precision,easy to servo and so on;1 micron resolution grating as a feedback element;Secondly,the control method selected PID control method,which is widely used and easy to set parameters;Communication choose the common RS232 communication line to establish the serial communication mode;Thirdly,some parts models are designed and simulated by UG;Finally,human-computer interface is designed and written by C ++.In addition,a multi-functional bioreactor based on linear motor is studied in this paper.The main contents of the study include system composition,control principle,software system and loading performance.Among them,the loading performance of the study showed that: Under the roll / slide load module,when the bioreactor working stroke is 50 mm,its frequency range is 0.01Hz-0.3Hz;Under the tension and compression load module,the bioreactor amplitude can be achieved 0.01 mm,the frequency can reach 10Hz;Under the impact test module,when the bioreactor working stroke is 50 mm,the achievable acceleration is a=54.16m/s2;Under the high acceleration cycle loading module,the bioreactor acceleration can be realized as 8G.The linear accelerator developed in this paper will be more applied to study theeffects of high acceleration on animals,tissues,organs,cells and so on,which provides a research platform for this aspect.The combined multi-functional bioreactor not only provided the conditions for the study of related mechanics biology,but also had a certain reference value for the development of the equipment based on linear motor and PMAC.