Spectroscopy in the mid-infrared region is an indispensable tool for identifying molecular types various fields, including physics, chemistry, and medical sciences. However, conventional infrared light sources, detectors, noise from blackbody radiation have been obstacles to miniaturization higher sensitivity of spectrometers. Quantum spectroscopy, which uses visible photon pairs a quantum entangled state, has attracted attention as new sensing technology that enables spectroscopy with...

This paper describes a decoupling motion control strategy based on an equivalent mass matrix in operational space. In the conventional approach, is defined as function of Jacobian and inertia manipulator. Therefore, it difficult to know variation precisely select arbitrarily. makes realize controller To improve above problem, authors introduce robust disturbance observer. observer-based determined arbitrarily independently configuration First, derived. Second, simplification method space...

The paper presents a visual feedback control using optical flow vectors detected from camera image for biped walking robot. authors have proposed the vision-based stabilization motion in past research. In approach, zero moment point (ZMP) is related with target position field of view, and ZMP stabilizer rotational around center gravity designed by image-based controller. For more improved performance stability, additionally employed generating recovery modifying ZMP, it enable quick stable...

The exceptionally high carrier mobilities found in zero-gap ${\mathrm{Hg}}_{1\ensuremath{-}x}{\mathrm{Cd}}_{x}\mathrm{Te}$ $(x\ensuremath{\approx}0.10)$ give rise to giant magnetoresistance (GMR). A two-carrier, high-field model provides a good description of the and Hall effect at temperatures $6<T<300$ K magnetic fields up $H=10$ T. data have significant influence on interpretation low-field results, particular revealing presence acceptors despite fact that coefficient is negative....

Recently, misoriented (100)GaAs or (211)GaAs substrates have been found to be favored for HgCdTe and CdTe epitaxial growths, due low occurrence of crystalline defects. It was previously reported that both tilted (211) (133)CdTe were grown on (211)B GaAs, like (100)GaAs, seemed better crystallinity than (211)CdTe. However, these results obtained only at substrate temperature ∼300 °C, the growth orientations has not clear yet. In this article, dependence GaAs is studied in detail, from view...

In this paper, an impedance control strategy for a redundant manipulator based on workspace observer is proposed. The calculation of the controller becomes more complicated as number degree-of-freedom increases because pseudo inverse Jacobian matrix generally used. To improve problem, disturbance applied to each joint eliminate dynamical effects. This makes it easy realize virtual in space. Furthermore obtain decoupled response workspace. case, works null space effect response. means that...

To measure the eye diagram of a high bit rate optical signal, authors have generated sampling pulse by gain switching, and reduced timing jitter using CW light injection. The system was 0.7 ps, signal-to-noise ratio 20 dB at signal peak power 2.3 mW.

view Abstract Citations (31) References (11) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A balloon observation of diffuse far-infrared emission from the galactic plane. Maihara, T. ; Oda, N. Okuda, H. The has been observed by a balloon-borne telescope with 0.7 x 1 deg arc beam, giving surface-brightness distribution along plane 340 to 32.5 longitude. overall similarity between isophote and 5-GHz radio-continuum map, as well close correlation H166-alpha...

CdTe(1̄ 1̄ 3̄)B epilayers were grown on Si substrates oriented (112)5° off toward the [1̄ 1] direction by molecular beam epitaxy (MBE). A Zn irradiation process was developed in order to obtain a (1̄ face. HgCdTe(1̄ 20 μm-thick CdTe/Si(112) 5° off, and characterized. These layers have double-crystal x-ray rocking curves with full width at half-maximum as low 64 arc s, etch pit densities of 4.4×106 cm−2 2.6×105 for as-grown thermal-cycle annealed films, respectively. Photodiodes also...

In this paper, a motion control strategy based on disturbance observer for hyper-redundant manipulator is proposed. the manipulator, it difficult to realize force or an arbitrary at end-effector because requires complicated calculations construct acceleration controller in workspace. To improve issue, we introduce simplified both backbone curve (BC) which generally used and workspace observer. The proposed method makes possible design flexibly simplify its calculation process. Furthermore,...

Room temperature giant magnetoresistance (GMR) has been measured in small band-gap thin-film Hg1−xCdxTe (x∼0.1) samples with Corbino disk electrode configurations. The GMR exhibits a zero-field offset of as much 350 G at room temperature. resultant asymmetry the field dependence constitutes self-biasing effect. We show that this results from spatial composition fluctuations sample and bias effect can be controlled by selective doping and/or deposition masking.

In this paper, an observer based local torque optimization strategy for a redundant manipulator is proposed. The calculation of optimizing controller becomes more complicated as the number degree-of-freedom increases because pseudo inverse Jacobian matrix generally used and needs to calculate null space term dynamical term. To improve problem, disturbance applied simplify calculation. Then, realized without much effort effects. Furthermore we can find that motion designed according kind optimization.

In this paper, a motion control for redundant manipulator based on observer is proposed. the conventional manipulators, pseudo-inverse matrix and null space vector of Jacobian are used end-effector configuration control, respectively. However, calculation such controller becomes more complicated as number degree-of-freedom increases. proposed combined with workspace by using observer-based robust technique. Accordingly, design process total much simplified, our approach realize effects...

This paper describes a decoupling control and null space damping strategy of redundant manipulator by disturbance observer. In the robot based on joint observer, equivalent mass matrix, which represents virtual in operational space, is defined independently dynamics manipulator. And force workspace. So observer workspace jointspace can be applied to simultaneously. feature makes it easy realize controller simplify inverse kinematics problem including damping. Several numerical results are...

This paper describes an optical sensing approach of gait compensation by using laser range finder for biped walking robot. Generally in the robot control, response force information received from ground environment is one important Indexes to realize stable generation. For fault tolerant and more reliable motion future, this focuses on geometric relation between robots floor without sensor. That is, sole deformation observed sensor mounted at hip robot, used modifying into balanced direction...

Model for HgCdTe photoconductor sensitivity was constructed by solving a three dimensional (3-D) transport equation. The model takes into account recombination velocities at crystal side walls and surfaces, device temperature rise due to bias current Joule heat dependence of ambipolar mobility. Parameters, i.e., velocity wall, minority carrier bulk lifetime majority concentration were fixed comparing the measured responsivity with calculated lifetime. Using parameters thus fixed, noise...

In high-mobility Hg1−xCdxTe (x=0.10), the physical giant magnetoresistance (GMR), due to orbital motion of carriers in applied magnetic field, is apparent at high field (H&amp;gt;1/μe). At low (H&amp;lt;1/μe), this enhanced by a geometrical GMR associated with conducting inhomogeneities semiconductor. previous work, we have presented model which accounts quantitatively for enhancement. Here report on dependence direction field. The transverse shows low-field boost expected; longitudinal case...