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A novel spatiotemporal muscle activity imaging (sMAI) approach has been developed using the Extended Kalman Filter (EKF) to reconstruct internal muscle activities from non-invasive multi-channel surface electromyogram (sEMG) recordings. A distributed bioelectric dipole source model is employed to describe the internal muscle activity space, and a linear relationship between the muscle activity space...
mLLDPE(metallocene polyethylene)/LDPE/CB(conductive carbon black) composite with positive temperature coefficient(PTC) was successfully prepared by blending. The rheology behavior and the strength of PTC of the composites were investigated through methods of rheometer test, resistance measurement, scanning electronic microscope (DSC) and scanning electron microscope (SEM) analysis. The results showed...
This paper presents an active fault-tolerant control( FTC) architecture for satellite attitude control system(ACS) by combining iterative learning ideology and unknown input observer(UIO). As an integral part of active FTC system(FTCS), a learning UIO(LUIO) is proposed to achieve attitude angular velocities estimation and robust reconstruction of adaptive compensation law simultaneously based on the...
Appearance-based robot navigation has long been a fundamental goal in both robotics and computer vision research. While the problem is largely solved for robots equipped with active range-finding devices, for a variety of reasons, the task still remains challenging for robots equipped only with vision sensors. This paper proposes a appearance-based navigation system utilizing information from omnidirectional...
We propose a robust method based on genetic algorithm for the estimation of the motion between two successive overlapping images, a classic problem in computer vision. To calculate the motion parameters encoded as a chromosome, we employed roulette wheel selection and total arithmetic crossover and developed a novel adaptive mutation operator. The experimental results show that the normalized registration...
To accelerate the processing for integration, registration, representation and recognition of point cloud, it is of growing necessity to simplify the polygonal surface. Mesh simplification is an approach to vary the levels of visual details as appropriate, thereby improving on the overall performance of the applications. This paper proposes an effective mesh simplification method which is based on...
At present, industrial frequency heating technology is widely used to extract heavy oil which the content of glial asphalt, wax and freezing point are higher. Its heating effect is poor and it wastes electricity seriously. With the integrated application of eddy effect, skin effect and proximity effect, a novel heating system was developed. Both a dedicated multi-function cable and three-phase AC...
The monitoring and measurement results indicate that, severe influence may be brought to electromagnetic devices of power systems such as power transformers by DC bias effects. So, DC bias blocking device must be designed and manufactured to ensure the safety and stability of the power systems. In this paper, optimized analysis were done on the DC current blocking scheme based on the existed dual...
EstabLish the fault tree model of the semi-automatic implanting machine, and analysis all subsystems' reLiabiLity quantitatively according to the failure data of the testing machine, in order to find out the weakest Link and potential weaknesses of this system. And then propose the corresponding measures to improve the design and improve its reLiabiLity.
In order to clear up false alarms caused by electromagnetic interference, a novel field way was put forward in which the radiated emission measurement in the coal mining roadway was finished. The data was obtained through the spectrum analyzer. Firstly, the optimization of explosion-proof enclosure was completed according to the distribution of radiated interference characteristics. As a result, with...
A consensus-based distributed control algorithm for double-integrator multi-agent systems, motivated by a state-based weighted consensus algorithm of single-integrator dynamics, has been proposed in this paper. Its convergency has been proved by LaSalle’s Invariance principle. An interesting result has been obtained using the graph Laplacian matrix. Simulation results are provided to demonstrate the...
This paper is concerned with the design problem of robust fault-tolerant controller of linear uncertain satellite attitude control systems. The design method of output feedback robust fault-tolerant controller with failures of actuators and sensors is proposed to meet the given control performance by using LMI method. A numerical example of satellite attitude fault-tolerant control system is given...
This paper did research on fault-tolerant control of satellite control system. Based on general discussion over all available fault-tolerant control methods, we chose linear matrix inequation (LMI) to do research on robust fault-tolerant control. The result could apply to the control problem of three-axis stabilized directional satellite control system. Also, we use our result on fault diagnosis of...
A surface electromyography (EMG) based muscle activities imaging (sEMG-MAI) approach has been developed using the bioelectrical source reconstruction approach to minimally invasively reconstruct muscle activities in the three dimensional (3D) space of the periurethral muscles (including urethral and anal sphincter, and the surrounding muscles) of the female pelvic floor from multi-channel intra-anal...
In many automation equipment production process, it is essential to ensure constant tension of the material, to ensure product quality and production efficiency. In order to make the feeding process of this chip mounter stable, and ensure the accurate measurements, we use the principle of automotive brake to improve the tension institutions, and design cam - rotating drum constant tension control...
This paper presents a new algorithm for real time tracking of the exterior and interior surfaces of organs using sparse sampling of the exterior surfaces. The tracking is based on identifying subspaces in which the coefficients of spherical harmonic representations of the surfaces live. It uses pre operative CT/MRI scans during training, and needlescopic images acquired during tracking. We study different...
This paper investigates the design and application of a sliding mode observer (SMO) strategy for fault detection problem for satellite attitude control systems. A particular design of sliding mode observer is presented for which the parameters can be obtained by a linear change of coordinates under some conditions. Instead of generating residuals for other observer-based fault detection methods, the...
The problem of integrated fault diagnostic and fault-tolerant control for uncertainty linear system is developed. Focusing on the actuator and sensor faults of satellite, we presents a fault diagnosis method based on sliding mode observer. And considering the uncertainties of diagnosis results, we also design a Hinfin state-feedback controller to achieve the fault-tolerance by solving a linear matrix...
In this study, we compare the messless finite element method (FEM) with conventional FEM for solving the ECG forward problem. The present simulation results are encouraging, illustrating the benefits and limitations of the meshless FEM approach using only node information, and suggest that the meshless FEM approach could merit further investigations.
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