scholarly journals A Novel Bionic Piezoelectric Actuator Based on the Walrus Motion

2021 ◽  
Author(s):  
Jianping Li ◽  
Junjie Cai ◽  
Nen Wan ◽  
Yili Hu ◽  
Jianming Wen ◽  
...  
Keyword(s):  
Piezoelectric Actuator ◽  
High Performance ◽  
Experimental System ◽  
Piezoelectric Actuators ◽  
Experimental Results ◽  
Maximum Speed ◽  
Vertical Load ◽  
Positioning Systems ◽  
The Real ◽  
Set Up

AbstractA novel bionic piezoelectric actuator based on the walrus motion to achieve high performance on large working stroke for micro/nano positioning systems is first proposed in this study. The structure of the proposed walrus type piezoelectric actuator is described, and its motion principle is presented in details. An experimental system is set up to verify its feasibility and explore its working performances. Experimental results indicate that the proposed walrus type piezoelectric actuator could realize large working stroke with only one driving unit and one coupled clamping unit; the maximum stepping displacement is ΔLmax = 19.5 μm in the case that the frequency f = 1 Hz and the voltage U = 120 V; the maximum speed Vmax = 2275.2 μm · s−1 when the frequency f = 900 Hz and the voltage U = 120 V; the maximum vertical load mmax = 350 g while the voltage U = 120 V and the frequency f = 1 Hz. This study shows the feasibility of mimicking the bionic motion of the real walrus animal to the design of piezoelectric actuators, which is hopeful for the real application of micro/nano positioning systems to achieve large working stroke and high performance.

Modeling of Piezoelectric Actuator Based Nano-Positioning System Using Multi-Polynomial Regression with C1 Continuity

2007 ◽  
Vol 339 ◽  
pp. 434-441 ◽  
Author(s):  
S. Tse ◽  
Y. Gao
Keyword(s):  
Piezoelectric Actuator ◽  
Polynomial Regression ◽  
Piezoelectric Actuators ◽  
Zero Order ◽  
Positioning System ◽  
Modeling Error ◽  
Order Continuity ◽  
Positioning Systems ◽  
First Order ◽  
Command Signals

For nano-positioning systems with piezoelectric actuators used for dynamic grinding control, sinusoidal command signals will used and will give additional problems compared with the commonly used step signals because of the hysteresis effects, which require a good modeling approach. The proposed approach of multiple polynomial regression with first order continuity gives a relative modeling error of 2.65%. The method reduces the error by 26.3-80.2% in comparison with the methods using the single, dual, and multiple polynomial regression with zero order continuity.

scholarly journals Design of a Low-Frequency Harmonic Rotary Piezoelectric Actuator

Actuators ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 4
Author(s):  
Kang Liang ◽  
Chong Li ◽  
Yujian Tong ◽  
Jiwen Fang ◽  
Wei Zhong
Keyword(s):  
Piezoelectric Actuator ◽  
Harmonic Wave ◽  
Low Frequency ◽  
Experimental System ◽  
Piezoelectric Actuators ◽  
Driving Voltage ◽  
Driving Frequency ◽  
Output Characteristics ◽  
Driving Signal ◽  
Harmonic Displacement

Piezoelectric actuators usually operate under a high frequency driving signal. Here we report a harmonic rotating piezoelectric actuator by coupling a harmonic wave generator and a friction rotor, in which the actuator can be actuated by a low-frequency sinusoidal signal with positive bias. The harmonic wave is generated by a two-stage magnifying mechanism consisting of a displacement amplifier and a harmonic rod. Applying piezoelectricity theory, the actuator’s output characteristic equations are deduced. What is more, the output characteristics of piezoelectric actuators are tested with the established experimental system. Results show that the generated harmonic displacements can drive the actuator to work normally at a driving voltage of larger than 90 V and the maximum total harmonic displacement of the piezoelectric actuator comes up to 427.6 μm under the driving voltage of 150 V. Meanwhile, the error between the measured and calculated values of the harmonic displacement is less than 7%. Furthermore, the rotational speed of the piezoelectric actuator reaches 5.45 rpm/min at 150 V voltage and 5 Hz driving frequency.

Design of a Precision Linear-Rotary Positioning Actuator

2006 ◽  
Vol 18 (6) ◽  
pp. 803-807 ◽  
Author(s):  
Wei Gao ◽  
◽  
Shinji Sato ◽  
Yasumasa Sakurai ◽  
Satoshi Kiyono
Keyword(s):  
Piezoelectric Actuator ◽  
Piezoelectric Actuators ◽  
Rotary Motion ◽  
Maximum Speed ◽  
Sinusoidal Voltage ◽  
Precision Positioning ◽  
Revolution Speed ◽  
Long Stroke ◽  
Ceramic Cylinder

We designed a prototype linear-rotary (<I>Z</I>-θ) dual-axis actuator for precision positioning in which an aluminum rotor (moving element) moves along and rotates around the axis (<I>Z</I>) of a ceramic cylinder (drive rod). The <I>Z</I>-θ actuator consists of a <I>Z</I>-piezoelectric actuator (<I>Z</I>-PZT) (maximum stroke: 12µm) for linear <I>Z</I>-motion, two θ-piezoelectric actuators (θ-PZTs) (maximum stroke: 9.1µm) for rotational θ-motion, a drive rod, and a rotor. θ-PZTs are attached to the drive rod via a clamp. The rotor’s inner side contacts the drive rod with a certain friction. <I>Z</I>-axis positioning uses a smooth impact drive to achieve a long stroke by applying periodic saw-toothed voltage to the <I>Z</I>-PZT. Sinusoidal voltage is applied to θ-PZTs for rotary positioning, not based on a smooth impact drive. The prototype actuator stroke along the <I>Z</I>-axis, limited by the drive rod length, is 10mm and rotary motion is unrestricted. Positioning resolution is a few nanometers and maximum speed in the <I>Z</I>-direction is approximately 2.4mm/s. The maximum revolution speed is 50rpm.

Optimal Design of Piezoelectric Actuator for Precision Positioning Applications

2014 ◽  
Vol 625 ◽  
pp. 224-229
Author(s):  
Lien Kai Chang ◽  
Mi Ching Tsai
Keyword(s):  
Piezoelectric Actuator ◽  
Vibration Mode ◽  
Piezoelectric Actuators ◽  
Resonance Vibration ◽  
Precision Positioning ◽  
Positioning Accuracy ◽  
Positioning Systems ◽  
Measurement Systems ◽  
Optimal Efficiency ◽  
Elliptical Motion

Recent advances in measurement systems require positioning systems with high stiffness, accuracy and speed. Piezoelectric actuators which are featured with mechanical simplicity, quick response, and electromagnetic immunity, are often used in precision positioning. It is known that piezoelectric actuators can achieve high positioning accuracy by the stepping mode but low speed. By contrast, the resonance vibration mode will offer high positioning speed, but sacrifices the high inherent position resolution. For the stepping mode, the displacement of the piezoelectric actuator significantly affects the speed, of which larger displacement induces higher speed. For the resonance vibration mode, an elliptical motion of the piezoelectric actuator tip is generated by horizontal and vertical eigenmodes, and the optimal efficiency can be achieved when the two eigenmodes are operated at the same frequency. For the applications of high positioning accuracy and speed, a piezoelectric actuator should be designed by taking these two operation modes into consideration simultaneously. Based on these requirements, the optimal structural dimensions of a piezoelectric actuator are obtained using a genetic algorithm.

Hysteresis Investigation of Shear-Mode MR Damper for Front-Loaded Washing Machine

2019 ◽  
Vol 889 ◽  
pp. 361-370
Author(s):  
Duy Quoc Bui ◽  
Bao Tri Diep ◽  
Hiep Le Dai ◽  
Long Vuong Hoang ◽  
Quoc Hung Nguyen
Keyword(s):  
Experimental Test ◽  
Mr Damper ◽  
Experimental System ◽  
Experimental Results ◽  
Shear Mode ◽  
Hysteresis Model ◽  
Washing Machine ◽  
Hysteresis Behavior ◽  
Set Up ◽  
Hysteresis Behaviour

In this research, a shear-mode MR damper that can replace conventional passive damper of a front-loaded washing machine is designed, manufactured and an experiment based model is employed to characterize hysteresis behavior of the damper. Firstly, an optimized MR damper for front loaded washing machine is manufactured and an experimental system is set up for testing hysteresis behaviour of the damper. The experimental test is then conducted and presented. From experiential results, hysteresis of the damper is investigated and a suitable hysteresis model is proposed for the damper. The proposed hysteresis model of damper is then evaluated through experimental results.

Labview Based Experimental System Design for the Investigation of Magnetorheologic Fluids Inductance

2012 ◽  
Vol 246-247 ◽  
pp. 1226-1230
Author(s):  
Guo Tian He ◽  
Jie Sheng Chen ◽  
Li Song ◽  
Yan Ma ◽  
Ming Li ◽  
...  
Keyword(s):  
System Design ◽  
Frequency Domain ◽  
Time Domain ◽  
Signal Analysis ◽  
High Performance ◽  
Experimental System ◽  
Experimental Results ◽  
Important Impact ◽  
Intelligent Material ◽  
And Function

A Magnetorheologic fluid is a kind of intelligent material with high performance, its inductance has an important impact on its manufacturing and application, and thus it is important to investigate its inductance. This paper mainly introduced the method using labview to develop an experimental system to investigate magnetorheologic fluids inductance, and built such a system. It also discussed the composition and function, and designed the experimental procedures. We detected and analysis magnetorheologic fluids inductance under different conditions. This system utilized software to implement realtime sampling of time domain signals, display frequency domain signal and some other signal analysis function. Experimental results indicated that this system is feasible.

Experimental Study on Additive of the Foam Technology for Dust Control in Underground Coal Mines

2012 ◽  
Vol 430-432 ◽  
pp. 1486-1492
Author(s):  
Wan Xing Ren ◽  
Zeng Hui Kang
Keyword(s):  
High Performance ◽  
Water Film ◽  
Experimental System ◽  
Dust Control ◽  
Additive Concentration ◽  
Flotation Process ◽  
Foaming Agent ◽  
Wetting Ability ◽  
Large Contact Area ◽  
Set Up

The advantages of the dust control by foam are demonstrated, such as the high covering power, large contact area, high wetting speed and good isolation performance, which can control the dust efficiently. In consideration of wetting and foaming capabilities of the foam, a new kind of foaming agent with high foam expansion and wetting ability is developed after a large number of filtering and compound experiments by the ROSS-Miles method and water film flotation process method. After the experiments of the foaming ability and the wetting ability to different dust grains with different particle diameters, the results show that the new foaming agent can reduce the surface tension of solid and liquid materials rapidly with good foaming and wetting abilities. After the experiment of experiments, the best additive concentration of the new foaming agent is 0.5%, and a complete new experimental system is set up to produce foam, and the dust-control foam with high performance is produced using new foaming agent.

scholarly journals High-Bending-Stiffness Connector (HBSC) and High-Authority Piezoelectric Actuator (HAPA) Made of Such

Actuators ◽  
2018 ◽  
Vol 7 (3) ◽  
pp. 61
Author(s):  
Yu Huang ◽  
Yue Xia ◽  
Dian Lin ◽  
Leong-Chew Lim
Keyword(s):  
Piezoelectric Actuator ◽  
High Performance ◽  
Active Material ◽  
Piezoelectric Actuators ◽  
Bending Stiffness ◽  
Lower Lever ◽  
Design Requirements ◽  
Multi Level ◽  
Simulation Results ◽  
Upper Level

High-authority piezoelectric actuator (HAPA) is a term used to describe high-performance piezoelectric actuators of relatively large displacement (≥50 μm) and high blocking force (≥100 N), but compact in size. One such piezoelectric actuator is described in this paper, which is made possible by means of high-bending-stiffness connector (HBSC) that connects multiple commercial piezoceramic stacks into a stable 2- (or multi-) level actuation configuration. Key design requirements for the HBSC are described. Computer simulation results and experimental verification are presented. A HAPA-(2 + 2) actuator was fabricated from such a HBSC, in which there are two commercial PZT stacks projecting upwards in the upper level and two projecting downwards in the lower lever, all of 5 × 5 mm2 in cross-section and 40 mm in length. The HAPA-(2 + 2) actuator prototype displays about twice the overall stroke and blocking force of individual stacks, being about 90 μm and >1600 N, respectively. This compares favorably with lever-arm, flextensional, and telescopic actuators, of which the blocking force is adversely affected. Using a similar concept, HBSCs and HAPAs of other designs are presented. In addition to being stand-alone actuators, the HAPAs can be used as the active material to drive existing displacement amplification schemes to produce piezoelectric actuators of exceptional performance characteristics.

About the concept of synthesis of high-performance detection and positioning systems in the areas of elements falling, separated from strategic and space missiles on the trajectories of their flight during tests and regular operation

2018 ◽  
pp. 10-21
Author(s):  
G. G. Vokin
Keyword(s):  
High Performance ◽  
Physical Nature ◽  
Positioning Systems ◽  
Physical Conditions ◽  
Highly Efficient

The article describes the approach and topical issues of synthesis of highly efficient transportable systems for search and determination of coordinates in the areas of elements falling, separated from the missiles, taking into account the dislocation of pre-empted areas of fall and physical conditions in their territories. The principles of these systems are based on the rational integration of traditional and non-traditional information sensors of different physical nature, which record the moments of landing of separated parts of the missiles.

Power Test System Development and Dynamic Performance State Estimation Based on Hub Motor Vehicle

2020 ◽  
Vol 13 (2) ◽  
pp. 126-140
Author(s):  
Jing Gan ◽  
Xiaobin Fan ◽  
Zeng Song ◽  
Mingyue Zhang ◽  
Bin Zhao
Keyword(s):  
Real Time ◽  
Dynamic Performance ◽  
Test System ◽  
Operating Conditions ◽  
Motor Vehicles ◽  
Maximum Speed ◽  
Performance Parameters ◽  
Power Performance ◽  
Power Test ◽  
The Real

Background: The power performance of an electric vehicle is the basic parameter. Traditional test equipment, such as the expensive chassis dynamometer, not only increases the cost of testing but also makes it impossible to measure all the performance parameters of an electric vehicle. Objective: A set of convenient, efficient and sensitive power measurement system for electric vehicles is developed to obtain the real-time power changes of hub-motor vehicles under various operating conditions, and the dynamic performance parameters of hub-motor vehicles are obtained through the system. Methods: Firstly, a set of on-board power test system is developed by using virtual instrument (Lab- VIEW). This test system can obtain the power changes of hub-motor vehicles under various operating conditions in real-time and save data in real-time. Then, the driving resistance of hub-motor vehicles is analyzed, and the power performance of hub-motor vehicles is studied in depth. The power testing system is proposed to test the input power of both ends of the driving motor, and the chassis dynamometer is combined to test so that the output efficiency of the driving motor can be easily obtained without disassembly. Finally, this method is used to carry out the road test and obtain the vehicle dynamic performance parameters. Results: The real-time current, voltage and power, maximum power, acceleration time and maximum speed of the vehicle can be obtained accurately by using the power test system in the real road experiment. Conclusion: The maximum power required by the two motors reaches about 9KW, and it takes about 20 seconds to reach the maximum speed. The total power required to maintain the maximum speed is about 7.8kw, and the maximum speed is 62km/h. In this article, various patents have been discussed.

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