scholarly journals A Review of Novel Architectures of Servovalves Driven by Piezo-Electric Actuators

2021 ◽  
Author(s):  
Paolo Tamburrano ◽  
Francesco Sciatti ◽  
Andrew R. Plummer ◽  
Elia Distaso ◽  
Pietro De Palma ◽  
...  
Keyword(s):  
Piezoelectric Materials ◽  
Fast Response ◽  
Performance Parameters ◽  
Direct Drive ◽  
High Complexity ◽  
Large Size ◽  
Low Weight ◽  
Electric Materials ◽  
Actuation Systems ◽  
Piezo Electric

This paper is a thorough review of innovative architectures of electro-hydraulic servovalves that exploit actuation systems based on piezo-electric materials. The use of commercially available piezo-electric actuators, namely, piezo-stacks, amplified piezo-stacks, rectangular benders and ring benders, is very promising for the actuation of the main stages and of the pilot stages of servovalves, given the fast response and low weight of piezoelectric materials. The use of these actuators can also allow novel designs to be developed, thus helping manufacturers to overcome the typical drawbacks of commercial servovalves, such as the high complexity and the high internal leakage of the pilot stages of two stage servovalves, as well as the large size and weight of direct drive servovalves. Firstly, the piezoelectric actuators that can be used for driving servovalves are presented in the paper and their characteristics are thoroughly discussed. Then, the main novel architectures present in the literature are explained and compared with the commercial ones, and their performance parameters are discussed to draw conclusions on the prospect that some of these architectures can be used by manufacturers as future designs.

scholarly journals A Review of Novel Architectures of Servovalves Driven by Piezoelectric Actuators

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4858
Author(s):  
Paolo Tamburrano ◽  
Francesco Sciatti ◽  
Andrew R. Plummer ◽  
Elia Distaso ◽  
Pietro De Palma ◽  
...  
Keyword(s):  
Piezoelectric Materials ◽  
Piezoelectric Actuators ◽  
Fast Response ◽  
Direct Drive ◽  
High Complexity ◽  
Large Size ◽  
Low Weight ◽  
Electric Materials ◽  
Actuation Systems ◽  
Piezo Electric

This paper is a thorough review of innovative architectures of electro-hydraulic servovalves that exploit actuation systems based on piezo-electric materials. The use of commercially available piezo-electric actuators, namely, piezo stacks, amplified piezo stacks, rectangular benders, and ring benders, is very promising for the actuation of the main stages and of the pilot stages of servovalves given the fast response and low weight of piezoelectric materials. The use of these actuators can also allow novel designs to be developed, thus helping manufacturers to overcome the typical drawbacks of commercial servovalves, such as the high complexity and the high internal leakage of the pilot stages of two-stage servovalves as well as the large size and weight of direct-drive servovalves. First, the piezoelectric actuators that can be used for driving servovalves are presented in the paper, and their characteristics are thoroughly discussed. The main novel architectures present in the literature are then explained and compared with the commercial ones, and their performance parameters are discussed to draw conclusions on the prospect that some of these architectures can be used by manufacturers as future designs.

scholarly journals Direct Drive Servovalves Actuated by Amplified Piezo-Stacks: Assessment through a Detailed Numerical Analysis

Actuators ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 156
Author(s):  
Paolo Tamburrano ◽  
Elia Distaso ◽  
Andrew R. Plummer ◽  
Francesco Sciatti ◽  
Pietro De Palma ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Response Speed ◽  
Fast Response ◽  
Step Response ◽  
Diamond Structure ◽  
Direct Drive ◽  
Low Weight ◽  
Mechanical Amplification ◽  
Amplification System ◽  
Linear Force

This paper presents a feasibility study using commercially available amplified piezo-stacks for the direct actuation of four-way three-position (4/3) direct drive servovalves. The prospect of using amplified piezo-stacks in place of linear force motors is very attractive by virtue of their fast response speed and low weight. Piezo-stacks equipped with mechanical amplification systems can give levels of displacement suitable for this application. A very effective amplification system has recently been produced by some manufacturers and is based on a temperature-independent diamond structure. This paper details simulations of a 4/3 servovalve directly actuated by such a piezoelectric actuator with a diamond structure. To this end, well-established equations, implemented in Simulink by means of the libraries of Simscape Fluids, are used. The proposed architecture shows simplicity of construction; in addition, very good step response speed and frequency response are predicted by the simulations.

scholarly journals Advances in the Structural Health Monitoring of Bridges Using Piezoelectric Transducers

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4312 ◽  
Author(s):  
Yunzhu Chen ◽  
Xingwei Xue
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Piezoelectric Materials ◽  
Low Cost ◽  
Rapid Development ◽  
Concrete Strength ◽  
Steel Corrosion ◽  
Fast Response ◽  
Future Application ◽  
Structural Health

With the rapid development of the world’s transportation infrastructure, many long-span bridges were constructed in recent years, especially in China. However, these bridges are easily subjected to various damages due to dynamic loads (such as wind-, earthquake-, and vehicle-induced vibration) or environmental factors (such as corrosion). Therefore, structural health monitoring (SHM) is vital to guarantee the safety of bridges in their service lives. With its wide frequency response range, fast response, simple preparation process, ease of processing, low cost, and other advantages, the piezoelectric transducer is commonly employed for the SHM of bridges. This paper summarizes the application of piezoelectric materials for the SHM of bridges, including the monitoring of the concrete strength, bolt looseness, steel corrosion, and grouting density. For each problem, the application of piezoelectric materials in different research methods is described. The related data processing methods for four types of bridge detection are briefly summarized, and the principles of each method in practical application are listed. Finally, issues to be studied when using piezoelectric materials for monitoring are discussed, and future application prospects and development directions are presented.

Design, modeling, and analysis of wedge-based actuator with application to clutch-to-clutch shift

2017 ◽  
Vol 232 (9) ◽  
pp. 1149-1166
Author(s):  
Fengyu Liu ◽  
Li Chen ◽  
Jian Yao ◽  
Chunhao Lee ◽  
Chi-kuan Kao ◽  
...  
Keyword(s):  
Dynamic Models ◽  
Fast Response ◽  
Physical Structure ◽  
Modeling And Analysis ◽  
Shift Quality ◽  
Actuation System ◽  
Automatic Transmissions ◽  
Potential Alternative ◽  
Low Efficiency ◽  
Actuation Systems

Clutch-to-clutch shift technology is a key enabler for fast and smooth gear shift process for multi gear transmissions. However, conventional hydraulic actuation systems for clutches have drawbacks of low efficiency, oil leakage and inadequate robustness. Electromechanical devices offer potential alternative actuators. In this paper, a novel motor driven wedge-based clutch actuator, featuring self-reinforcement, is proposed. The design concept and physical structure are thoroughly described. Dynamic models for the actuation system and vehicle powertrain are validated by experiments. Upshift and downshift processes at different engine throttle openings, clutch clearances and friction coefficients are discussed. The results show that, the self-reinforcement ratio is tested as 9.6; at the same time, the shift quality is comparable to that of the conventional hydraulic actuated clutch in automatic transmissions in terms of the shift duration (about 1 s) and vehicle jerk (<10 m/s3). Taking advantage of fast response of the actuation DC motor, the wedge-based actuator is robust dealing with uncertain clutch clearance and friction coefficient. Therefore, the wedge-based clutch actuator has potential to provide acceptable performance for clutch-to-clutch shift.

Modeling and stabilization of current-controlled piezo-electric beams with dynamic electromagnetic field

2020 ◽  
Vol 26 ◽  
pp. 8
Author(s):  
Ahmet Özkan Özer ◽  
Kirsten A. Morris
Keyword(s):  
Electromagnetic Field ◽  
Piezoelectric Materials ◽  
Electrical Potential ◽  
Gauge Condition ◽  
Current Control ◽  
Magnetic Vector Potential ◽  
Bounded Control ◽  
The Cauchy Problem ◽  
A Current ◽  
Piezo Electric

Piezoelectric materials can be controlled with current (or charge) as the electrical input, instead of voltage. The main purpose of this paper is to derive the governing equations for a current-controlled piezo-electric beam and to investigate stabilizability. The magnetic permeability in piezo-electric materials is generally neglected in models. However, it has a significant qualitative effect on properties of the control system such as stabilizability. Besides the consideration of current control, there are several new aspects to the model. Most importantly, a fully dynamic magnetic model is included. Also, electrical potential and magnetic vector potential are chosen to be quadratic-through thickness to include the induced effects of the electromagnetic field. Hamilton’s principle is used to derive a boundary value problem that models a single piezo-electric beam actuated by a current (or charge) source at the electrodes. Two sets of decoupled system of partial differential equations are obtained; one for stretching of the beam and another one for bending motion. Since current (or charge) controller only affects the stretching motion, attention is focused on control of the stretching equations in this paper. It is shown that the Lagrangian of the beam is invariant under certain transformations. A Coulomb type gauge condition is used. This gauge condition decouples the electrical potential equation from the equations of the magnetic potential. A semigroup approach is used to prove that the Cauchy problem is well-posed. Unlike voltage actuation, a bounded control operator in the natural energy space is obtained. The paper concludes with analysis of stabilizability and comparison with other actuation approaches and models.

Environmental Impact Mitigation on the Gasduc-3 Project

2010 ◽  
Author(s):  
Celso A. d’Oliveira ◽  
Eliane H. de Paula ◽  
Dilian A. D. Freire
Keyword(s):  
Sustainable Development ◽  
Natural Gas ◽  
Environmental Impact ◽  
Mitigation Measures ◽  
High Complexity ◽  
Environment Impact ◽  
Impact Mitigation ◽  
Large Size ◽  
Environmentally Sensitive Areas ◽  
Environmentally Sensitive

This paper approaches the environment impact mitigation measures adopted in the Cabiu´nas-Reduc-3 project (Gasduc-3), completed in January 2010. This high complexity project has great strategic importance to the Company and for the extension of natural gas offer in Brazil. Due to the large size of the project and its interference with environmentally sensitive areas, several programs and actions have been carried out in the influenced areas what allowed the team to conclude Gasduc-3 and, at the same time, follow through with the premise of sustainable development.

Design and Analysis of a Novel Radial Mud Pump Directly Driven by Permanent Magnet Disc Synchronous Motor

2011 ◽  
Author(s):  
J. T. Liang ◽  
S. D. Zhao ◽  
Y. H. Hu
Keyword(s):  
Finite Element Analysis ◽  
Permanent Magnet ◽  
Synchronous Motor ◽  
The Novel ◽  
Performance Parameters ◽  
Direct Drive ◽  
Flow Pulsation ◽  
Element Analysis ◽  
And Performance ◽  
Flush Fluid

Mud pump is an important component of drilling equipments, which transports flush fluid like mud or water into bore in order to cool drill and carry debris. In this paper, a novel radial mud pump directly driven by permanent magnet disc synchronous motor (PMDSM) is designed, the influence of different numbers of plunger cylinders on the pump’s flow pulsation is analyzed to determine the pump’s configuration and driving requirement, and the structure and performance parameters of the direct drive PMDSM are calculated by finite element analysis. Compared with conventional mud pumps, the novel pump is characteristic that the structure is simple, working stability and efficiency are greatly improved, also the life of the equipment is extended.

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