Showing papers in "Mechatronics in 1998"

TL;DR: In this paper, the authors define a number of design rules for shape memory alloy based robotic actuators and demonstrate that SMA actuation offers very attractive properties for example in space applications and especially in a zero-gravity environment.

TL;DR: In this paper, a continuously variable electro-rheological damper for a passenger vehicle is proposed and its control characteristics are investigated, where the field-dependent yield stress of arabic gum-based ER fluid is obtained using a couette type electroviscometer.

TL;DR: In this paper, the authors present the research work under the authors and their team in this area, which has been applied to more than 10 different kinds of machines including: turning centers and machining centers; small, medium and large machines; new products and retrofitted machines.

TL;DR: In this paper, the authors describe a successful method for high-speed end-milling of aluminum parts with large, thin, flexible webs, which are the thin structures created at the face of the end mill, as opposed to ribs.

TL;DR: In this paper, the authors apply the fuzzy control technology and modified differential PWM control method to control the position of a pneumatic rodless cylinder, which has the advantages both good performance and low cost with the proposed controller.

TL;DR: In this article, a new thermal error model is presented which capitalizes on the notion that thermally induced errors are related to the integral of the temperature field and captures that integral via the Gaussian integration technique.

TL;DR: In this article, an experimental investigation of a multiple disk electro-rheological viscous device, that can for experimental purposes be used as both brake and clutches, is presented; the device used has 10 pairs of rotating and stationary (or rotated) disks with 1 mm disk spacing.

TL;DR: In this article, boundary controllers for a cantilevered Euler-Bernoulli beam with point-mass dynamics at the free end were developed, which exponentially stabilizes the beam displacement.

TL;DR: In this paper, the authors present a framework for the design, manufacture, and evaluation of planar micro-drills with curved helical point and flute geometry. But they focus on the flute and not on the flank.

TL;DR: In this paper, the design, fabrication and testing of silicon micromachined magnetic actuators are presented, which are capable of providing large force (in the order of mN) and large displacement within micro electromechanical devices and systems.

TL;DR: In this paper, the identification of the dynamic model for a power steering system constructed using a rotary valve is presented, where the steering system is divided into two subsystems: mechanical and hydraulic.

TL;DR: In this paper, a nano-metric precision three degrees of freedom (DOF) positioner is designed and fabricated as a fast tool servo to compensate the effect of friction and backlash of a machine tool stage, a CMAC neural network control algorithm was applied in order to provide on-line learning and better tracking capability compared to standard PID control algorithm.

TL;DR: In this paper, the measuring efficiency of vision sensor predicted by its model and the criterion for data deficiency was in significant agreement with experiments for typical corrugations of shipping containers and LNG tanks.

TL;DR: In this article, surface micromachined pressure sensors have been designed, optimized and fabricated by means of LPCVD (Low Pressure Chemical Vapor Deposition) and used as the core elements in micro pressure sensors.

TL;DR: In this article, a new generation of high-performance adaptive smart structures with self-modification capability is advanced to resist dynamic loadings due to both nature such as wind and earthquake loadings and man such as blast and bomb loadings.

TL;DR: In this article, a parallel wire mechanism was developed for measuring six degrees of freedom of a robot end-effector, which consists of six parallel wire links, and the position and orientation of the robot were obtained from the wire lengths measured in the mechanism.

TL;DR: In this paper, a proof-of-concept investigation on an active vibration control of two hybrid smart structures is presented, which consists of a piezoelectric film actuator and an electro-rheological fluid (ERF) actuator.

TL;DR: In this article, the theory of electrochemical etching and galvanic element formation in a wet etchant in general and its applications to etch stop engineering for bulk-micromachining was discussed.

TL;DR: In this paper, an algorithm is proposed to eliminate chattering by removing the discontinuous control signal when the system is operating near the sliding plane, and the transient performance as well as the robustness property will not be affected and zero steady state error is ensured.

TL;DR: In this article, a closed loop digital velocity servo control is successfully implemented in the racking motion of a wheel loader using a standard proportional-integral (PI) and a dynamic valve transform algorithm.

TL;DR: In this paper, the authors presented a new idea of force feedback in the teleoperated mobile robot control: artificial force reflection, which can increase the sense of telepresence of the robot.

TL;DR: In this article, a variable structure-augmented adaptive controller is proposed for a class of multivariable nonlinear servomechanisms commonly encountered in many industrial applications, where the proper integration of adaptive and variable structure methods results in a controller where uniformly stable operation is achieved together with asymptotic tracking of the reference command signals.

TL;DR: Both computer simulation and experimental implementation demonstrate that IFLC is particularly effective in position control of a DC-servomotor under shaft frictional load, inertia disk load and mixed frictional/inertial load conditions.

TL;DR: In this paper, the authors discuss various developments of mechatronics in Asia from three perspectives: education, research and applications of the technology, and discuss various interesting developments in MEAT within Asia.

TL;DR: In this article, an improvement strategy in robust control is proposed for uncertain linear or nonlinear systems, which first modifies the original desired trajectory, and then imposes robustness against uncertainties in tracking the new trajectory.

TL;DR: An agent-oriented methodology for representation, acquisition, processing of manufacturing knowledge and analysis, modeling of Intelligent Manufacturing System (IMS) is presented in this article, where the behavior of the entire manufacturing system is collaboratively determined by many interacting subsystems that may have their own independent interests, values and modes of operation.

TL;DR: In this article, a variable remote center compliance (VRCC) device is proposed to improve the flexibility and dependability of robotic assembly operations by controlling the mechanical-impedance.

TL;DR: Miniature fluid pumps, measuring 15×4×1 mm, have been microfabricated with silicon, glass, and polyimide and have been tested with deionized water and 10% glycerol solutions as the working solutions.

TL;DR: In this article, the finite element modeling (FEM) of thin diaphragms with clamped edges under various load conditions, including when the diaphrms touches the substrate, is presented.

TL;DR: In this article, an optical method based on Confocal scanning optical microscope (CSOM) was developed for measurement and assessment of surface topography and form errors like circularity, cylindricity, sphericity and flatness.