2 results about "Magnetostrictive actuator" patented technology

The application relates to the technical field of vibration generating devices, in particular to a micro acceleration generating device based on a magnetostrictive effect, which comprises a shell base, a magnetostrictive actuator, an inner shell base, a work platform, bottom and side vibration isolation springs, a guide assembly, a standard vibration sensor and a control module; the bottom vibration isolation springs are connected with the inner shell base and the shell base respectively, and the side vibration isolation springs are connected with the side walls of the inner and outer shell bases respectively; the magnetostrictive actuator is arranged in the inner shell base, the output rod upper end of the magnetostrictive actuator is in abutment with the work platform, and the standard vibration sensor is installed on the top end of the work platform installation part; the inner ring of the guide assembly is connected with the flange part, and the outer ring is connected with the inner shell base. The device can drive micro vibration with large current by using the characteristics of small displacement and large thrust of the magnetostrictive material, can eliminate electric noise interference, can guarantee high signal-to-noise ratio, and can realize non-contact friction axial guidance through elastic micro deformation of the diaphragm spring, so that the work platform only moves in the vertical direction with single degree of freedom.

A feedback linearized sliding mode control method for hybrid vibration isolation of a supermagnetostrictive actuator and an air spring belongs to the field of electronic design modeling technology. To ensure precise control of the hybrid vibration isolation system of the supermagnetostrictive actuator and air spring, this invention considers the effects of eddy current loss, temperature effect, and prestress, establishes the relationship between the expansion rate of the supermagnetostrictive material and the magnetic field strength, and constructs the constitutive equation of the supermagnetostrictive actuator; it also establishes the dynamic equilibrium equation of the hybrid vibration isolation system of the supermagnetostrictive actuator and air spring; it uses a feedback linearized sliding mode control strategy to control the dynamic equilibrium equation of the hybrid vibration isolation system of the supermagnetostrictive actuator and air spring, obtaining the feedback linearized sliding mode control equation; based on the feedback linearized sliding mode control equation and the relationship between the expansion rate of the supermagnetostrictive material and the magnetic field strength, a control method for the hybrid vibration isolation system of the supermagnetostrictive actuator and air spring is constructed. This invention provides precise control.