Abstract
Many types of devices and handling platforms are used for microscale manipulation and microassembly ranging from microgrippers for individual part handling to work surfaces equipped with discrete actuators capable of simultaneous multiple part handling and manipulation. Micropart handling using discrete actuators suffers from dead zone constraint that requires the size of the part to be larger than the gap between consecutive actuators to ensure part contact with multiple actuators at all times for proper handling. In the context of the dead zone constraint, a new micromanipulation technique was proposed in our previous work based on the concept of active deformable surface. The time-dependent deformation geometry of the micropart carrying surface is controlled by actuators rigidly attached to it. The deformation acceleration imparted by the actuators generates an inertia which, considering other parameters, can induce a motion on the micropart placed on the surface. These parameters include size, mass and material properties of the micropart and the surface roughness characteristics. This research extends our previous work of modeling micropart dynamics and motion from 1D to motion on a 2D surface. The mathematical model is developed and subsequently employed in numerical simulations to study the micropart motion and controlled translocation on the deformable active surface. The analysis allows for the identification of a feasible region of influence of the actuator, effects of surface motion characteristics, micropart convergence at particular locations and evaluation of motion characteristics. The results of this research could be advantageously employed for the development of 2D microconveyors as an integral component of microassembly platforms.
Highlights
T HE history of micropart handling goes back to the conception and production of micro electromechanical systems (MEMS)
MEMS production mostly comprises of two steps: microscale component manufacturing and assembly
A concept of controlling the motion of multiple objects on a Chladni plate is presented in [14], no model discussing the interaction of microscale forces between particle and surface is presented
Summary
T HE history of micropart handling goes back to the conception and production of micro electromechanical systems (MEMS). A concept of controlling the motion of multiple objects on a Chladni plate is presented in [14], no model discussing the interaction of microscale forces between particle and surface is presented These part handling workcells, due to their discrete actuation mechanisms, are limited in their ability or unable to VOLUME xx, 2021. Naeem et al.: Micropart Motion on a Surface due to Controlled Surface Excitation handle microscale components mainly due to the dead zone constraint This constraint requires the micropart dimension to be larger than the free space between two consecutive actuators as shown schematically for a pneumatic microconveyor in Fig. 1a [15], otherwise the micropart could get trapped in the free space. The manuscript closes with a discussion on micropart position convergence at particular locations on the workcell surface
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