The Research And Exploitation Of Giant Magnetostrictive Intelligent Component Driving System

Giant Magnetostrictive Actuator(GMA) is a novel smart actuator which is based on Giant Magnetostrictive Material(GMM).For GMA's merits of high precision, fast response, large output displacement,it is now widely utilized in some ultra-precision machining tools, ultra-precision position control, sensors, vibration control, etc.Piston is one of the most important parts of an engine, its performance quality directly affect the operation of an engine. According to experience, Adopting piston with non-circular piston hole can effectively decrease the risk of stress concentration which circular piston hole have, and greatly enhance the piston's performance.But in fact, traditional non-circular piston hole manufacturing methods have various disadvantages, flexure boring system which based on the GMA could achieve higher performance. so as a magneto-mechanical energy converter, power amplifier is one of the most important arts of that system.In the first chapter of this paper, the first is an introduce of GMA's characteristic features and applications; then, application situation of GMA, the requirements for a magneto-mechanical energy converter, power amplifier's domestic and international development researchs are summarized. on that basis, a design of a power amplifier was proposed for flexure type GMA.In the second chapter, we set the parameters of power amplifier in advance, which based on the application situation of the GMA. At first we divide the whole power amplifier into different function modulus; then, make specific design for each function modulus, include the operation mode of each function modulus, Choose the right components and so on; At last,integrate each modulus together, and complete the power amplifier's schematic diagram.In third chapter, introduce various matters and the corresponding solutions that meeting in the process of making power amplifier for high output power, high output current, output voltage, control precision, fast response and noise interference. These matters include Power interference on the influence of operational amplifiers, power dissipation of power MOSFET and corresponding cooling methods, and various protective methods for the power amplifier.In the fourth chapter,we test the performance of the power amplifier on Power amplifier test platform which based on virtual instrument. These testings including output characteristic testing, noise interference testing and so on.Because this power amplifier is used for non-circular piston hole manufacturing system, so in the fifth chapter of this paper, we test the total output characteristic of power amplifier in this GMA system. Experiences reveal that it has high precision of amplitude and phase, and suitable for the system.In the last chapter, main work and key innovative points are summarized, and further research work is put forward.