Experimental study of electric suspension for microbearings

Kumar, Surinder; Cho, Dong‐il Dan; Carr, W.N.

doi:10.1109/84.128052

Cited by 48 publications

(13 citation statements)

References 5 publications

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“…Fully rotational microdevices are limited in their performance by surface forces, such as friction, while solid-solid interfaces in rotating parts often suffer from wear, further decreasing performance. To minimize the effect of friction in rotary devices, contact needs to be limited by either micro-ball bearings [11], hydro-dynamic bearings [12], air bearings created through magnetic or electrostatic suspension [13,14], or a liquid film [15,16]. While most of these strategies require complex manufacturing processes with tight tolerances, the bearings used in this work were printed monolithically, requiring only a single fabrication step.…”

Section: Characterization Of 3d Printed Rotational Bearingsmentioning

confidence: 99%

A 3d-Printed 1 Mg Legged Microrobot Running at 15 Body Lengths Per Second

Pierre¹,

Gosrich²,

Bergbreiter³

2018

2018 Solid-State, Actuators, and Microsystems Workshop Technical Digest

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This work presents an experimental platform for studying the locomotion of small-scale (<100 mg) legged microrobots. Robot chassis were fabricated with microscale 3D printing and embedded permanent magnets provide actuation. The design integrates a full rotational friction bearing in the hip joint, capable of actuation up to 150 Hz with no visible signs of wear after rotating at 100 Hz for over 1,000,000 cycles. The robot presented in this work weighs 1 mg and is observed running at speeds up to 37.3 mm/s (14.9 body lengths per second) providing initial insights on the dynamics of legged locomotion at ant-scales.

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Section: Characterization Of 3d Printed Rotational Bearingsmentioning

confidence: 99%

A 3d-Printed 1 Mg Legged Microrobot Running at 15 Body Lengths Per Second

Pierre¹,

Gosrich²,

Bergbreiter³

2018

2018 Solid-State, Actuators, and Microsystems Workshop Technical Digest

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“…The authors analyzed two designs having a single and dual stator (see Figure 2a,b) and considered their potential application in micro-motors and bearings. Then, in 1992, the single-stator design for an application as micro-bearing was successfully experimentally studied by levitating a micro-plate having a thickness of 180 µm [21]. The actuator was able to generate a force up to 0.2 µN along the vertical axis.…”

Section: Electric Levitation Micro-actuatorsmentioning

confidence: 99%

Levitating Micro-Actuators: A Review

et al. 2018

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Through remote forces, levitating micro-actuators completely eliminate mechanical attachment between the stationary and moving parts of a micro-actuator, thus providing a fundamental solution to overcoming the domination of friction over inertial forces at the micro-scale. Eliminating the usual mechanical constraints promises micro-actuators with increased operational capabilities and low dissipation energy. Further reduction of friction and hence dissipation by means of vacuum leads to dramatic increases of performance when compared to mechanically tethered counterparts. In order to efficiently employ the benefits provided by levitation, micro-actuators are classified according to their physical principles as well as by their combinations. Different operating principles, structures, materials and fabrication methods are considered. A detailed analysis of the significant achievements in the technology of micro-optics, micro-magnets and micro-coil fabrication, along with the development of new magnetic materials during recent decades, which has driven the creation of new application domains for levitating micro-actuators is performed.

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“…This technique, which has been employed in a vacuum gyro [5] and microbearings [6], can also be used to levitate silicon wafers [7], hard disk media [8] and even dielectric materials such as glass [9]. However, there is no previous study that has really discussed using an electrostatic levitator for pick and place behavior in which the levitator is moved to the object.…”

Section: Introductionmentioning

confidence: 99%

Pick and Place of Hard Disk Media using Electrostatic Levitation

West

Yamamoto

Higuchi

2007

Proceedings 2007 IEEE International Conference on Robotics and Automation

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This paper focuses on a practical application of handling contact sensitive objects such as silicon wafers or hard disk media without any contact using electrostatic levitation. Stable electrostatic levitation can be realized by controlling an electrostatic force on the basis of measured suspension air gaps. Two control approaches, namely centralized and de-centralized control and the influence of an integrator in the controller, are discussed with regard to the specific tasks of Pick Up and Place. The final goal is to realize a handling tool that allows human operators to perform these object handling tasks. In this paper a linear motor is used to perform the Pick Up and Place task to allow a controllable and reproducible motion. The experimental results show a stable Pick Up and Place motion, where placing is realized without any external control commands.

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Experimental study of electric suspension for microbearings

Cited by 48 publications

References 5 publications

A 3d-Printed 1 Mg Legged Microrobot Running at 15 Body Lengths Per Second

A 3d-Printed 1 Mg Legged Microrobot Running at 15 Body Lengths Per Second

Levitating Micro-Actuators: A Review

Pick and Place of Hard Disk Media using Electrostatic Levitation

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