Abstract: An analysis of transverse comb structure based MEMS accelerometer is carried out. Its static and dynamic behavior is analyzed by employing a simple electrical equivalent circuit in the acceleration range of 0-30g. The device is simulated for dc, transient and frequency conditions. In the transient analysis, the device is excited with sinusoidal and step input acceleration and the proof mass displacement is evaluated. It is found that, the capacitance and displacement values obtained from our simulation matches well with reports from ANSYS Workbench®. The maximum displacement in the structure is evaluated at different condition and the effect of damping is investigated.
Abstract: The plug door system is an important guarantee of the safe operation of the emu, since it has structural redundancy, correlation function and fault dynamic characteristics, this paper uses the dynamic fault tree analysis method for reliability analysis. In deep understanding of the basis of the structure and working principle of the plug door, dynamic fault tree model is established by the way of structure ontology, Module iteration is introduced , and the Markov method is adopted to solve the reliability. At the last, we obtained the equipment failure rate and the reliability of the whole system.
Abstract: The demand for quantitative gait analysis increases due to increasing number of neurological disorder patients. Conventional gait analysis tools such as 3D motion capture systemsare relatively expensive. Therefore, there is a need to develop a low cost sensor system to obtain the spatial temporal gait parameters without compromising too much on the accuracy. This paper describesthe development of a wearable low cost sensor system which consists ofrelatively less sensing elements with 2 accelerometers, 4 force sensitive resistors (FSR) and 2 EMG electrodes. Thesensor output was validated by a vision system and the relative error was less than 5% formost of the gait parameters measured.
Abstract: Indoor localization system has been a popular research area in recent decades and many of them are based on multiple beacons localization method. However, there are some special applications to which the multiple beacons method is not an optimal solution due to its overdesign and cost of redundancy. Multiple beacons method uses at least three transducers and each transducer’s location must be known to find the location of a target object by using either Triangulation or Trilateration calculation. When the multiple beacons method is applied in an items lost and found system, the precise Cartesian coordinates of a target item can be found, but it is definitely overdesign and incurring redundant cost. It is due to the fact that the target item requires only two simple information i.e. Clock orientation and distance information; therefore, single beacon is enough for the task. In this paper, we propose a single beacon localization method to optimize the solution in the items lost and found system by utilizing clock orientation and estimated distance information. The proposed single beacon localization algorithm has been demonstrated and proven that it can be one of the optimal solutions for items lost and found system.
Abstract: This study combines image processing and enzyme to conduct the research and develope a detection system for adhesive cells detachment. First, a PCI video capture card is used to capture the microscope images into the computer, a program is edited to detect cell morphology and determine the detachment status of the cells, and then cell morphology was compared by detection data (roundness and centroid locating), in order to establish rules to detect the cell suspensions.
This experiment will find the boundary sensitivity parameter, “fudgeFactor”, and the rules for the detection of cell suspension. The multiple displacement difference compliance rate (90%) is greater than displacement difference compliance rate (70%), and compared with the roundness detection, then cell detachment can be accurately measured.
Abstract: A new brake-by-wire system based on direct-drive electro-hydraulic brake unit for flexibly modulating brake force is designed to improve braking performance and ride comfort. The structure of the brake unit and the composition of the system are discussed in detail. The simulation and experiment are completed to verify the brake unit is fast responsible and reliable after studying the unit model. At last, a vehicle model based on Matlab/Simulink and AMESim is established to verify that this new system is of fast response and is able to control brake force on every wheel independently and continuously.
Abstract: This paper focuses on the control system design for a process of autothermal reforming (ATR) of ethanol. The targeted application is within an on-board fuel processor of ATR operating at the adiabatic reaction temperature for hydrogen production. An internal model control (IMC) method is designed for controlling the adiabatic reaction temperature of ATR reactor by manipulating the input air flow rate. Two strategies of controller design with and without the feed temperature control of the preheater unit are proposed in order to determine the suitable controller system as the surrounding temperature is a major disturbance for cold weather. Theoretical analysis demonstrates that IMC strategy can achieve desired performance. Two loops of control system of the ATR process combined with the feed temperature control can compensate the surrounding temperature better than without the feed temperature control.
Abstract: In this paper, we analyse human gait patterns, including knee and hip joint torques and muscle activities, during step initiation phase and continuous walking phase. Additionally, we present a lower limb exoskeleton called the Unmanned Technology Research Centre Exoskeleton (UTRCEXO) implementing a precedence walking assistance mechanism based on the gait characteristics. The operator equipped with the Unmanned Technology Research Centre Exoskeleton (UTRCEXO) walks with a 15 kg load at 3.3 km/h step velocity.
Abstract: Wheeled based sniffer robots have been using in current research trend of odor plume tracking, but they have a serious pitfall because they only perform2D odor plume tracking which is ineffective. The main reason of being ineffective is because wheeled sniffer robots ignore the fact that the majority of odor plumes are released into 3D space instead of 2D space. Therefore, a flying sniffer robot is needed to overcome 3D odor plume tracking problem. In this paper, we propose to use a quadrotor as the locomotion of a flying sniffer robot. In order to make sure the quadrotor based flying sniffer robot can perform well in odor plumes tracking, we have carried out a detail study in airflow simulation analysis by using Computational Fluid Dynamics (CFD) software. Besides, we also conducted experiments to determine the odor sensing ability of quadrotor based flying sniffer robot. From our experiments, we are able to identify the odor sensing region of quadrotor based flying sniffer robot in quantitative measurement. From airflow analysis simulation study and experiments, we proved that a quadrotor based flying sniffer robot is a feasible solution for 3D odor plume tracking.
Abstract: Ionic Polymer Composite Material (IPMC) is a flexible material and has concealed many benefits to inspire the scientists and researchers to explore its physiognomies for real-world applications in various fields. Currently, the research area of IPMC can be alienated into two branches. One deals with the upgrading of the material properties to make it further advantageous and dependable while the other encompasses the consideration of new application capacities. In this paper, a new application of IPMC is recommended to stimulate a rigid link that can imitate a bionic knee joint for a grass hopper. Secondly, force-deflection mathematical model has been developed for the proposed design to investigate the amount of deflection that can be achieved by a certain force provided by the IPMC material strips. In this paper, the model is derived for the upward movement of the link; however the same model can be applied to the reverse direction because of the unanimity of the material properties and specifications.