scholarly journals Development of a Novel 2-DOF Rotary–Linear Piezoelectric Actuator Operating under Hybrid Bending–Radial Vibration Mode

Micromachines ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 728
Author(s):  
Andrius Čeponis ◽  
Dalius Mažeika ◽  
Daiva Makutėnienė
Keyword(s):  
Piezoelectric Actuator ◽  
Degrees Of Freedom ◽  
Printed Circuit Board ◽  
Vibration Mode ◽  
Contact Point ◽  
Electrical Signal ◽  
Circuit Board ◽  
Contact Friction ◽  
Radial Vibration ◽  
Positioning Systems

The paper presents a numerical and experimental investigation of a novel two degrees of freedom (2-DOF) piezoelectric actuator that can generate rotary motion of the sphere-shaped rotor as well as induce planar motion of the flat stage. The actuator has a small size and simple design and can be integrated into a printed circuit board (PCB). The application field of the actuator is small-dimensional and high-precision positioning systems. The piezoelectric actuator comprises three rectangular bimorph plates joined with arcs and arranged by an angle of 120 degrees. A high-stiffness rod is glued on the top surface of each bimorph plate and is used to rotate the rotor or move flat stage employing contact friction force. Three U-shaped structures are used for the actuator clamping. 2-DOF rotational or planar movement is obtained by applying a harmonic or asymmetric electrical signal. The operation principle of the actuator is based on the superposition of the B20 out-of-plane bending mode of the bimorph plates and the B03 radial vibration mode of the ring. Design optimization has been performed to maximize amplitudes of contact point vibration. A prototype of the actuator was made, and a maximum rotation speed of 795.15 RPM was achieved while preload of 546.03 mN was applied. The linear velocity of 36.45 mm/s was obtained at the same preload force. Resolution measurement showed that the actuator can achieve an angular resolution of 17.48 µrad and a linear resolution of 2.75 µm.

Vision-force guided precise robotic assembly for 2.5D components in a semistructured environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Boyoung Kim ◽  
Minyong Choi ◽  
Seung-Woo Son ◽  
Deokwon Yun ◽  
Sukjune Yoon
Keyword(s):  
Computer Aided Design ◽  
Degrees Of Freedom ◽  
Printed Circuit Board ◽  
Force Sensor ◽  
Circuit Board ◽  
Robotic Assembly ◽  
Ccd Cameras ◽  
Content Type ◽  
3 Dimensional ◽  
Aided Design

Purpose Many manufacturing sites require precision assembly. Particularly, similar to cell phones, assembly at the sub-mm scale is not easy, even for humans. In addition, the system should assemble each part with adequate force and avoid breaking the circuits with excessive force. The purpose of this study is to assemble high precision components with relatively reasonable vision devices compared to previous studies. Design/methodology/approach This paper presents a vision-force guided precise assembly system using a force sensor and two charge coupled device (CCD) cameras without an expensive 3-dimensional (3D) sensor or computer-aided design model. The system accurately estimates 6 degrees-of-freedom (DOF) poses from a 2D image in real time and assembles parts with the proper force. Findings In this experiment, three connectors are assembled on a printed circuit board. This system obtains high accuracy under 1 mm and 1 degree error, which shows that this system is effective. Originality/value This is a new method for sub-mm assembly using only two CCD cameras and one force sensor.

A High Performance Voice Coil Actuator for Optomechatronic Applications

2017 ◽  
Vol 9 (4) ◽  
Author(s):  
Dion Hicks ◽  
Taufiq Rahman ◽  
Nicholas Krouglicof
Keyword(s):  
High Performance ◽  
Degrees Of Freedom ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
The Novel ◽  
Array Configuration ◽  
Halbach Array ◽  
Mechanical Devices ◽  
Kinematic Mechanisms ◽  
Voice Coil Actuator

Voice coil actuators (VCAs) are simple electro-mechanical devices, which are capable of generating linear motion in response to an electrical input. The generic cylindrical design of commercially available actuators imposes a large variety of limitations on the end user. The most prominent is the requirement to design and fit extra components to the actuator in order to increase functionality. To solve this issue, a novel voice coil actuator was created, which reconfigures the standard cylindrical design with one of a rectangular structure. The novel actuator incorporates planar magnets in a modified Halbach array configuration to ensure compactness and an exceptionally intense, uniform magnetic field. The moving coil is substituted with a printed circuit board (PCB) encompassing numerous current conducting traces. The board contains a miniature linear rail and bearing system, unified drive electronics, and highly adaptive position feedback circuitry resulting in a compact, highly dynamic and accurate device. In pursuit of optomechatronic applications, two distinct parallel kinematic mechanisms (PKMs) were developed to utilize the high dynamics and accuracy of the novel actuator. These devices were configured to function in only rotational degrees-of-freedom (DOF) and because of their underlying kinematic structures can be referred to as parallel orientation manipulators (POMs). In particular, two structures were defined, 2-PSS/U and 3-PSS/S, in order to constrain their payloads to two and three degrees of rotational freedom, respectively. The resultant manipulators are highly dynamic, precise and fulfill size, weight, and power requirements for many applications such as sense and avoidance and visual tracking.

Integrated Printed Circuit Board (PCB) Active Cooling With Piezoelectric Actuator

2012 ◽  
Author(s):  
Janice C. Booth ◽  
Tracy Hudson ◽  
Brian A. English ◽  
Michael R. Whitley ◽  
Michael S. Kranz
Keyword(s):  
Piezoelectric Actuator ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Printed Circuit ◽  
Active Cooling

A PCB BASED CAPACITIVE SHEAR FORCE SENSOR DEVELOPED FOR ROBOTIC GRIPPER APPLICATION

2013 ◽  
Vol 24 ◽  
pp. 1360027
Author(s):  
JIAN-LIN HUANG ◽  
SHENG-JUI CHEN ◽  
GWO-JEN WU ◽  
CHUNG-LIN WU ◽  
SHEAU-SHI PAN
Keyword(s):  
Shear Force ◽  
Degrees Of Freedom ◽  
Printed Circuit Board ◽  
High Sensitivity ◽  
Force Sensor ◽  
Circuit Board ◽  
Optical Interferometer ◽  
Robotic Arms ◽  
Printed Circuit ◽  
Sensor Performance

The shear force sensor is one of the key elements in future robotic industry, it is of great importance in applications where robotic arms are required to delicately interact with objects to be handled. In this paper, we present the development of a capacitive shear force capable of sensing shear forces in two degrees of freedom. The fabrication of the sensor is based on the printed circuit board (PCB) fabrication process, a well-known and mature technology. We adopt the capacitance sensing scheme for its high sensitivity and easy implementation. For sensor characterization, we used a force gauge and an optical interferometer to measure sensor's parameters including its sensing coefficient and resolution. The dimension of our prototype shear force sensor including the metal housing is 26 mm×13 mm×58 mm suitable for the integration with commercial robotic grippers. For sensor performance, we achieved a shear force sensing coefficient of 23.3 fF/N and a resolution of smaller than 5mN.

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.

scholarly journals Wireless Power Transfer via Magnetic Resonant Coupling by using Printed Circular Coil

2019 ◽  
Vol 9 (2) ◽  
pp. 4674-4677
Keyword(s):  
Printed Circuit Board ◽  
Electromagnetic Coupling ◽  
Coupling Efficiency ◽  
Electrical Signal ◽  
Circuit Board ◽  
Wireless Charging ◽  
Wireless Power ◽  
Spiral Coil ◽  
Resonant Coupling ◽  
Coil Structure

Nowadays, wiring connections are slowly fade out and replace with wireless connection due to the inconvenient of installing wiring connection in the wall or exposes to outside. Lately, the demand of wireless charging mobile phone or even charging by wireless in the car is attracted attention and the statistic shows that it is increasing rapidly. These paper proposed by using planar type spiral coil structure method to transfer the electrical signal energy to receiver part so as to act as wireless charging. It represented by 2 parallel FR4 printed circuit board that with the layout of planar spiral coil mutually coupled together in the free space. Analysis of electromagnetic transfer between both spiral coil and the resonant frequency was compute by coupled inductance theory. Simulations by using Advanced Design Systems based on coupling theory shows that when the air gap distance is changing, it will affecting the electromagnetic coupling efficiency of the wireless electromagnetic charging.

scholarly journals Direct Chip Mounting — A Challenge to the Design Engineer

1982 ◽  
Vol 10 (1) ◽  
pp. 1-6
Author(s):  
J. Lorman ◽  
J. Prochaska
Keyword(s):  
Degrees Of Freedom ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Basic Element ◽  
Electronic Equipment ◽  
Circuit Board ◽  
Circuit Boards ◽  
Printed Circuit ◽  
High Degree ◽  
Good Possibility

The extrapolation of development trends in the area of technologically complicated electronic equipment shows an ever increasing complexity in semiconductor technology. This development has so concerned the constructors of electronic equipment that progress in the technology of mounting and interconnection has taken a secondary place.This growing divergence between a fast developing microelectronic industry, and a conservative state of the macroelectronics industry, is a driving force with regard to the progress to effective connection technologies at every level of mounting. The technological solution to all systems will then become more coordinated.The mounting of components to printed circuit boards is traditionally a soldering operation. This principle lead to the development of full automation, and is a standard mounting technology. The growth of integration at the chip level has however brought new requirements that are only satisfied with difficulty.Newly developed requirements show that the use of dual-in-line packages will be unsatisfactory. New methods must be designed to connect the chips directly to the printed circuit board, going from the chip as the smallest mounted unit.Requirements for very complex electronic equipment with a high degree of integration (LSI or VLSI) are not satisfied using traditional mounting systems. These require a totally new mounting concept, from the chips to the printed circuit board.In this paper alternatives to printed circuit board technology with insulated wiring (multilayers), and the mounting of chips from film carriers, are evaluated. These principles have a good possibility of further improvement as progress in mounting technology continues.Price reductions cause an extension of application possibilities and an extension of electronic designs. It is harder to make choices for new designs when there are more degrees of freedom. However the function of chips as the basic element is unchangeable and optimum designs need to be based on this concept.

Characteristics of Radiated Emission from a Printed Circuit Board with a Slit

2012 ◽  
Vol 132 (6) ◽  
pp. 404-410 ◽  
Author(s):  
Kenichi Nakayama ◽  
Kenichi Kagoshima ◽  
Shigeki Takeda
Keyword(s):  
Printed Circuit Board ◽  
Circuit Board ◽  
Printed Circuit ◽  
Radiated Emission

Confirming the Signal Integrity in Transmission of Digital Signals on Microstrip Straight Circuits via the Eye Diagrams

2014 ◽  
Vol 5 (1) ◽  
pp. 737-741
Author(s):  
Alejandro Dueñas Jiménez ◽  
Francisco Jiménez Hernández
Keyword(s):  
Integrated Circuits ◽  
Printed Circuit Board ◽  
Signal Integrity ◽  
High Volume ◽  
Information Storage ◽  
Circuit Board ◽  
Electromagnetic Simulation ◽  
Electronic Systems ◽  
Digital Signals ◽  
Printed Circuit

Because of the high volume of processing, transmission, and information storage, electronic systems presently requires faster clock speeds tosynchronizethe integrated circuits. Presently the “speeds” on the connections of a printed circuit board (PCB) are in the order of the GHz. At these frequencies the behavior of the interconnects are more like that of a transmission line, and hence distortion, delay, and phase shift- effects caused by phenomena like cross talk, ringing and over shot are present and may be undesirable for the performance of a circuit or system.Some of these phrases were extracted from the chapter eight of book “2-D Electromagnetic Simulation of Passive Microstrip Circuits” from the corresponding author of this paper.

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