Artykuł

Vol: 33 , Nr: 1 , Art.: 4
Tytuł / Title:
Force generation survey in magnetic shape memory alloys
Autorzy / Authors:
MINOROWICZ Bartosz mgr inż.
NOWAK Amadeusz mgr inż.
Instytut Technologii Mechanicznej Politechniki Poznańskiej
Słowa kluczowe / key words:
magnetic shape memory alloy, dSPACE, closed loop, force
Streszczenie / Summary:

Transducers used in all kinds of devices convert electrical input signal into a non-electrical,
usually mechanical output such as: strength, speed, displacement, flow rate or pressure. Different
kinds of electric motors and solenoids are commonly used as electromagnetic transducers. In this
paper authors present materials with magnetic shape memory, which are a new group of smart
material, and are subject to a number of ongoing research in the world. They change own
properties (length, internal stress), under an influence of an external magnetic field. Authors
placed in an introduction, a theoretical description of material, lists of their most important
features, and also described production process and principle of operation. In order to perform
research, a demonstration electromagnetic transducer was designed, which is distinguished by
magnetic induction in air gap of 0.7 T. Study contains an analysis of the basic nonlinearity of this
material, which is hysteresis, made to sinusoidal control signals of fading amplitude for both
polarities of input current. Next, authors attempted to adjust strength of closed loop system where
measured force was a feedback signal.