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Adaptive optics is used in modern telescope to compensate the wavefront aberrations introduced by the Earth's atmosphere. A continuous facesheet MEMS deformable mirror owing to its advantages is gaining popularity in the area of adaptive optics. The mirror layer is influenced by a matrix of force actuators each applying a point force for generating a desired shape. For small deformations this layer...
Astronomical telescopes are large systems which are designed to accurately track the objects in sky at very low velocities. In this paper we characterize the behavior of a telescope and employ Monte-Carlo technique to analyze robustness of parameter estimation. We present overall model of telescope with the LuGre model for friction and synthesis a feedback linearizable controller for the system. At...
Many of the components used extensively in today's handheld market are beginning to migrate from traditional lead frame design to leadless or non leaded. The primary driver for handheld manufacturers is the saved PC board space created by these components' smaller mounting areas. In addition, most components also have reductions in weight and height, as well as an improved electrical performance....
We have analyzed an eddy-current brake (ECB), using calculations based on the Fourier transform method. Here, we compare our results with test results and numerical results of the finite-element code ANSYS 11.0. We use our model to study the influence of certain design parameters on the torque-speed characteristics.
The authors introduce a model of a sensor system that can form the basis to measure particle characteristics by analyzing the vibrations caused by their elastic impact upon a thin plate. In this simple sensor model, the impacting particle generates a force pulse that has its shape influenced by the particle radius, density, impact velocity and modulus of elasticity. This force pulse can be estimated...
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