Study on a giant magnetostrictive actuator with constant output force

2013 ◽  
Vol 13 (2) ◽  
pp. 197 ◽  
Author(s):  
Hui Fang Liu ◽  
Zhen Yuan Jia ◽  
Fu Ji Wang ◽  
Fu cai Zong
Keyword(s):  
Output Force ◽  
Constant Output ◽  
Magnetostrictive Actuator

Giant Magnetostrictive Actuator and Its Application in Active Vibration Control

2005 ◽  
Vol 475-479 ◽  
pp. 2089-2094
Author(s):  
Hui Bin Xu ◽  
Tian Li Zhang ◽  
Cheng Bao Jiang ◽  
Hu Zhang
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Fast Response ◽  
Coupling Factor ◽  
Output Displacement ◽  
Output Force ◽  
Magnetostrictive Actuators ◽  
Active Vibration ◽  
Magnetostrictive Actuator ◽  
Static Output

TbDyFe is a rare earth-iron magnetostrictive alloy with “giant” magnetostrain, good magnetomechanical coupling factor and fast response. Giant magnetostrictive actuators (GMAs) are designed and fabricated with home-made TbDyFe rods. Their magnetostrain properties under varied operation are tested. The static output displacement up to 100μm and output force up to 1500N were obtained. The dynamic displacement increases with amplitude under fixed frequency and decreases with frequency under fixed amplitude generally. The maximum dynamic output displacement of 146µm was obtained at natural frequency around 5Hz. Active vibration control employing GMA was implemented in the flexible structure. The excellent damping effect, 20-30 dB under the frequency range from 10Hz to 100Hz was obtained. The dynamic phase delay of GMA has been analyzed. A novel improved FSLMS algorithm is proposed to achieve a better control performance.

Design of a Compliant Mechanism to Modify an Actuator Characteristic to Deliver a Constant Output Force

2006 ◽  
Vol 128 (5) ◽  
pp. 1101 ◽  
Author(s):  
C. B. W. Pedersen ◽  
N. A. Fleck ◽  
G. K. Ananthasuresh
Keyword(s):  
Compliant Mechanism ◽  
Output Force ◽  
Constant Output

A Two-Dimensional Adjustable Constant-Force Mechanism

2019 ◽  
Vol 142 (6) ◽  
Author(s):  
Yu-Ling Kuo ◽  
Chao-Chieh Lan
Keyword(s):  
Limited Range ◽  
Two Dimensions ◽  
Working Environment ◽  
Design Parameters ◽  
Constant Force ◽  
Two Dimensional ◽  
Output Force ◽  
Constant Output ◽  
Force Variation ◽  
Force Mechanism

Abstract Constant-force mechanisms (CFMs) can produce an almost invariant output force over a limited range of input displacement. Without using additional sensor and force controller, adjustable CFMs can passively produce an adjustable constant output force to interact with the working environment. In the literature, one-dimensional CFMs have been developed for various applications. This paper presents the design of a novel CFM that can produce adjustable constant force in two dimensions. Because an adjustable constant force can be produced in each radial direction, the proposed adjustable CFM can be used in applications that require two-dimensional force regulation. In this paper, the design formulation and simulation results are presented and discussed. Equations to minimize the output force variation are given to choose the design parameters optimally. A prototype of the two-dimensional CFM is tested to demonstrate the effectiveness and accuracy of adjustable force regulation. This novel CFM is expected to be used in machines or robots to interact friendly with the environment.

Output force of giant magnetostrictive actuator

2019 ◽  
Vol 33 (25) ◽  
pp. 1950301
Author(s):  
Yan Wu ◽  
Xuhui Liu ◽  
Tiantian Guo ◽  
Ye Qiu
Keyword(s):  
Force Sensor ◽  
Test System ◽  
Sensor Data ◽  
Magnetostrictive Materials ◽  
Output Force ◽  
Wide Range ◽  
Giant Magnetostrictive Materials ◽  
Data Acquisition Card ◽  
Potential Applications ◽  
Magnetostrictive Actuator

A new type of intelligent micro displacement materials, giant magnetostrictive materials (GMM), have a wide range of potential applications in the fields of micro vibrations. In this paper, a novel type of giant magnetostrictive actuator (GMA), mainly made by the giant magnetostrictive materials, is designed, and its inner structure and working principle are also discussed. To investigate the output force of giant magnetostrictive actuator, a test system, including the force sensor, data acquisition card and power supply equipment are established. The experimental results show, when the excited current increased from 0.5 A to 2 A gradually, the output force of the giant magnetostrictive actuator also gradually increased, in the condition of the pre-compress force from 100 N to 400 N, the output force of the giant magnetostrictive actuator will also increase with the increasing of the pre-compress force.

Design and Evaluation of Compliant Constant-Force Mechanisms

1996 ◽  
Author(s):  
Alisa J. Millar ◽  
Larry L. Howell ◽  
James N. Leonard
Keyword(s):  
Strain Energy ◽  
Experimental Validation ◽  
Large Range ◽  
Constant Force ◽  
Dimensional Synthesis ◽  
Output Force ◽  
Simplified Method ◽  
Constant Output ◽  
Force Mechanism ◽  
Constant Force Mechanism

Abstract Compliant constant-force mechanisms combine the effects of mechanical advantage and stored strain energy of flexible members to obtain constant output forces for a large range of input displacements. This paper extends and compliments previous work by accomplishing the following: i) dimensional synthesis is performed for a number of compliant constant-force mechanism configurations, ii) a simplified method of determining the magnitude of the constant output force is presented, and iii) experimental validation of the theory is addressed by reporting the results of testing three constant-force configurations. The results of i) and ii) are presented in a manner to be easily used by engineers designing such mechanisms. The results of iii) show that the mechanisms do follow a nearly constant force for a large input displacement, as predicted.

Design and testing of an enhanced shape memory actuator elastically compensated by a bistable rocker arm

2012 ◽  
Vol 24 (6) ◽  
pp. 704-716 ◽  
Author(s):  
Giovanni Scirè Mammano ◽  
Eugenio Dragoni
Keyword(s):  
Fatigue Life ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Experimental Testing ◽  
Test Results ◽  
Shape Memory Alloy Actuator ◽  
Output Force ◽  
Theoretical Predictions ◽  
Constant Output ◽  
Design And Testing

This article presents the design, the prototype construction, and the experimental testing of a shape memory actuator implementing the concept of elastic compensation put forward in a previous publication by the authors. A two-shape memory alloy actuator, compensated by a spring-assisted bistable rocker arm, is designed theoretically to provide nearly constant output forces and then it is built and characterized experimentally under laboratory conditions. The test results closely agree with the theoretical predictions and show that for given output force, the compensated actuator produces net strokes from 2.5 to 22 times greater than a twin uncompensated actuator. The stroke improvement increases dramatically with the generated output force. Weaknesses of the compensated design are the heavier average stress sustained by the shape memory alloy springs, which could impair the fatigue life, and a higher response time.

Design of Constant-Force Mechanisms Based on Straight-Line Linkages

2018 ◽  
Author(s):  
Hsin-Ting Huang ◽  
Chin-Hsing Kuo
Keyword(s):  
Mechanical Systems ◽  
Constant Force ◽  
Straight Line ◽  
Compression Spring ◽  
Output Force ◽  
Spring Type ◽  
Constant Output ◽  
Type C ◽  
Compression Springs ◽  
Complex Mechanical Systems

This paper presents two novel constant-force mechanisms (CFMs) based on Scott-Russell and Hart’s straight-line linkages with mechanical springs. By articulating either two compression springs (type C-C) or one compression spring with another one extension spring (type C-E) onto each of these two CFMs, the point(s) which trace straight-line trajectories can illustrate a constant force within the mechanism workspace. We also show that the preload of the extension spring for type C-E CFMs will not affect its constant-force property but can define the amount of the output force. The proposed concepts of CFMs are relatively simple and concise, which could be useful for the complex mechanical systems that request a constant output force. A constant-force robotic gripper is illustrated by using the proposed Scott-Russell-type CFM.

Experimental Study on the Coupling Properties of Force and Magnetic of Giant Magnetostrictive Actuator

2013 ◽  
Vol 411-414 ◽  
pp. 3134-3138
Author(s):  
Hong Xin Sun ◽  
Xiu Yong Wang ◽  
Mao Sheng Chen ◽  
Xue Tao Guo ◽  
Qing Jia Meng
Keyword(s):  
Smart Materials ◽  
Functional Relationship ◽  
Least Squares Method ◽  
Axial Strain ◽  
Magnetic Coupling ◽  
Excitation Voltage ◽  
Function Model ◽  
Giant Magnetostrictive Material ◽  
Output Force ◽  
Magnetostrictive Actuator

The giant magnetostrictive material (GMM) l belongs to smart materials, the axial strain of GMM can be changed along with the changes of the external magnetic field. The giant magnetostrictive actuator (GMA) is made on the base of GMM can achieve the real-time adjustment function of the displacement and the output power. In this paper, the GMA was designed and produced, and the functional relationship between the output force and the excitation voltage has been researched when the actuator was under different pre-pressures. By using the least squares method, a linear sub-analysis function model was fitted, which can simulate effectively the performance of the force magnetic coupling of the actuator.

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