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In this study, we focus on the alteration of negative dielectrophoresis (n-DEP) caused by small amount of DNA labeling on the microbeads and propose a new design of microfluidic device for more sensitive DNA detection. In previous study, we proposed a new electrical technique for rapid detection of DNA amplified by polymerase chain reaction (PCR). The method is based on dramatic alteration of dielectrophoresis...
3-dimensional touch sensing and long battery lifetime are two desired attributes in interactive displays. By employing piezoelectric material and rectifier circuitry related technique, force touch induced charges are used for both force strength detection and energy harvesting, achieving 3dimensional touch sensing and extended battery lifetime at the same time for interactive displays.
An inherent variable stiffness approach was proposed to suppress the rebound and impact of the electrostatic switch due to waveform deviations. A simple clamped-guided beam spring with large deflection, which generated inherent cubic nonlinear restoring force, was adopted for implementation of the approach. The initial stiffness is very small but increases significantly with the displacement. In this...
Current techniques of stress measurement to assess comfort for prosthetic limbs focus on resolving different forces as well as the directions for each force. The sophistication introduced by spatially scaling these techniques for the entire interface with the difficulty of integration in the current prosthetic limbs call for a more intelligent design. In this work, we introduce the design and experimental...
Serious sealing problems cause premature retirement of Lithium-ion punch cells in the service stage. This paper mainly investigates the sealing failure behavior of Li-ion punch cell. A non-linear peeling model was established with experimental verification to explain the failure behavior of sealing cohesive zone. Based on the peeling model, a sealing life prediction method is proposed by describing...
A vibration controller based on wavelet neural network (WNN) is designed for jacket-type offshore platforms with time delay. The offshore platform is regarded as a single-degree-of-freedom (SDOF) system while wave forces are irregular disturbances, and we can rebuild them in the context of Morison equation and wave theory. To reduce the vibration, a WNN vibration controller is designed based on a...
Nowadays, decreasing birthrate and aging population become to be the serious social problem in Japan. Therefore, needs of assistive devices are more and more increasing. When people use such assistive devices, there is a risk that devices cost user excessive burden. So analysis and evaluation of motions and load of person who uses assistive devices are necessary. In this paper, a model to analyze...
This paper proposes the improvement method of operability in a bilateral control by using visual information. The bilateral control system consists of a master system which is manipulated by the operator and a slave system which contacts remove environment. Considering the actual use of the bilateral control, the operator manipulates the master system while watching the visual information from the...
In order to realize the differential function of electric vehicle driven by two rear wheel-hub motors, by following the optimal slip ratio of each wheel and equalizing the slip ratio of both drive wheels as target, a electronic differential control strategy based on terminal sliding mode is proposed. First of all, according to the standard μ-λ curve, the optimal slip ratio of the pavement is determined...
This paper proposes intrinsic contact sensing using a particle filter. Intrinsic contact sensing is a method, which detects the contact position without any sensors on the outer shell. Force sensors are attached on the supporting point of outer shell instead. This method has been expanded to estimate contact information even without shape information. However, previous methods assume that contact...
Wireless bilateral control based haptic teleoperation is a potential and challenging technique that extends human beings' sensing to a remote environment. However, communication delay in a bilateral control system directly influences the performance and even produces instability. This paper presents a stable and high performance bilateral control with a switching algorithm. This proposal uses the...
Limited travel constrains the widely application of XYZ parallel micro/nano-positioning stage. In this paper, a novel parallel-kinematics micro/nano-positioning stage is proposed with the goal of enlarging the travel range. In order to obtain a large input displacement for actuating the stage, voice coil motors (VCM) are adopted. For a large-travel parallel stage, the cross-axis motion increases the...
The aircraft braking is a complex dynamic and kinematic process, involving the brake wheel and runway status, loaded state and anti-skid control strategy and other aspects, including sophisticated uncertainties and nonlinear factors. This paper aiming at the nonlinear tire model with unknown parameters, combined with the empirical fitting slip rate coefficient curve based on the linear identification...
This paper proposes a Model predictive control (MPC) for linear induction motor drive. Model Predictive Control (MPC) is a strong method for controlling drives of the linear induction motor. In comparison with the Direct Force Control (DFC), MPC is more precise and more effective in the selection of the voltage vector. The results show that this control method has a better performance in comparison...
The linear vernier permanent-magnet (LVPM) motor incorporates the merits of high efficiency and low cost, which is very suitable for long stroke applications. This paper proposed a new direct thrust force control for dual inverter fed open-end winding LVPM motor to reduce force ripple. First, the topology and structural characteristics of the LVPM motor are briefly presented. Second, the mathematic...
In this paper, in order to replace a conventional electric linear actuator which is consist of rotary PM machine and ball screw, a novel double-sided five-phase modular linear permanent magnet synchronous machine (MLPMSM) is proposed and designed with the same volume. The basic structure of the machine is firstly described and the major dimensions of one module are then optimized to acquire the largest...
This article presents the design and construction of a mechanism for emulating load forces caused by the road conditions and friction over an electric power assisted steering (EPAS). This mechanism uses extension springs and a rack-and-pinion mechanism to emulate these load forces. The purpose of devising this mechanism is to build an EPAS system test bench, that allows observing and testing the operation...
This document introduces an air-land robotic platform called Hexapodopter, capable of ground locomotion and vertical take-off and landing (VTOL). For walking, each of the limbs feature three degrees of freedom (DoF); for flying, the thrust is provided by a set of motors and propellers mounted on every limb. Due to its mechanical design, the Hexapodopter can reconfigure the thrust vectors of propellers...
We show that approximate similarity (near neighbour) search can be solved in high dimensions with performance matching state of the art (data independent) Locality Sensitive Hashing, but with a guarantee of no false negatives. Specifically we give two data structures for common problems. For c-approximate near neighbour in Hamming space, for which we get query time dn^{1/c+o(1)} and space dn^{1+1/c+o(1)}...
This study investigates the effect of different skewing methods and angles for switched reluctance machines (SRM) having high pole count using multiphysics simulations. A 24/16 SRM is modeled for each skewing method and different skewing angles using 3D electromagnetic finite element analysis (FEA). Mechanical and acoustical analyses are performed to evaluate the effectiveness of different skewing...
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