Output Property Model Of Giant Magnetostrictive Actuator And Virtual Instrument Testing Technology Research

The giant magnetostrictive actuator is characterized by large displacement, high force, fast response, high reliability, small amount of drift and low voltage drives and so on and has a wide range of potential applications in super-precision positioning, micro-motor, vibration control and fluid machinery, etc. It is a potential new type of intelligent driving component. Due to the lack of suitable modeling tools, the actuator has been designed based on the classical engineering approach: the need for prototyping and testing, what serious impact on its application. Moreover, the backwardness of experimental conditions has become one important factor that affect the application of giant magnetostrictive actuator. For giant magnetostrictive actuator experimental research , at home and abroad , most people using traditional experimental ideas and a variety of special testing equipment, not only the high cost and the function not easy expansion. The development of the job of actuator model and testing technology has a wide application value.Firstly, the actuator's classifications, giant magnetostrictive materials and GMA applications are introduced, both the models and virtual instrument technology are analyzed in depth.Subsequently, the static model with nonlinearity for GMA is founded according to the Jiles-Atherton magnetization model, quadratic moment domain rotation model, nonlinear piezomagnetic equation and actuator strain model. By using lumped parameter method, the linearity dynamic model for GMA is founded based on third piezomagnetic equation. The output step response and the frequency response for the actuator have been studied.The static and dynamic output properties for actuator are studied based on the lab's traditional instruments. The output of displacement identity for GMA is tested, by using the strain method, micro-displacement sensor and micrometer; the change of the actuator's output strain on a different frequency drive current is studied.A virtual testing system for actuator output property has been developed. A rapid PCI data acquisition card of plug-and-play was designed and produced. Application VC++ and MATLAB mixed composition method develop test system software. MATLAB and VC++ application system are integrated, and MATLAB can play it's advantages in the numerical calculation, algorithm design and data visualization, the efficiency of the system handling and stability are improved, also short the software development cycle.The virtual testing system for actuator output characteristics is jointly debugged and testing results are analyzed and compared with the results of traditional instruments. The system operation is stable and reliable, the desired objectives are achieved.