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A muti resonant controller for high-frequency-link single-phase inverter is proposed in this paper. An equivalent circuit, which behave just like conventional unipolar PWM inverter is proposed for the converter. The dynamic model of the inverter, which built in continuous domain, is built. The inverter has the advantages of high efficiency, high power density, low-cost, low noise, bidirectional power...
The elastic component transmission belt was taken as research object, and forming process parameters was optimized based on response surface method and DYNAFORM. The method of central composite design was used to select process parameters of numerical simulation, the response value of forming height for transmission belt was obtained by numerical simulation, and the second-order response surface model...
The fine analysis of rotor losses of induction motors requires separation of the slip- and high-frequency electromagnetic quantities under load conditions. However, the conventional method involves a full slip-cycle finite element simulation, which is very expensive in terms of CPU time and memory usage. To obtain a precise iron loss prediction with reduced time consumption, this paper proposes three...
Data compression technology is the necessary technology in the age of big data. Compared with software compression techniques, hardware compression techniques can improve speed and reduce power consumption. LZMA is a lossless compression technology, and its hardware implementation has broad application prospects. This paper proposes a novel high-performance implementation of the LZMA compression algorithm...
Real-time lossless compression can reduce the burden of big data transmission and storage. Hardware compression is faster and more energy saving when compared with software. This paper proposes a novel LZO hardware architecture and various acceleration methods, integrates the compressor module and other IP modules. Finally, test and demonstration are provided on the DE2 development board. The results...
This paper presents a lossless compression method dealing with the data in real time kinematic (RTK) system, which is an aggregation of frame difference and dictionary compression (AFD). AFD can exert advantage of pipeline hardware; reduce the amount of data transmission as to save energy. Experiment results showed that the compression time of typical RTK data was only 0.2 milliseconds, and the average...
The performance of router directly impacts the Network-on-Chip (NoC) performance. This paper focus on developing efficient microarchitecture of allocator in the router and proposed matrix-diagonal allocator with high matching quality and low packets latency. The allocator, taking advantage of the fact that each element in the diagonal doesn't share the same row or column, includes matrix-diagonal...
Due to the test requirements of ship latitudinal motion control, a model test system for active control of ship latitudinal motion is designed. According to the system, the demonstration and verification test for ship control schemes and rules were carried out. Meanwhile, a “PC/data acquisition and network module” flexible design scheme was adopted to build a demonstration platform for this type of...
This paper investigates the contour control problem of an X-Y table driven by two permanent magnet linear motors based on terminal sliding mode control method. By introducing a non-singular terminal sliding mode control(NTSMC), a novel contour controller is designed for biaxial motion control system. A variable exponential reaching law based on equivalent error was designed in order to eliminate the...
In the recent years, microfluidic technology has paved the way for so-called Labs-on-Chips (LoCs) — a convenient and cost-effective way to conduct biochemical, biological, or medical experiments. Instead of conducting tests manually in a fully equipped lab using up lab equipment and human resources, LoCs allow us to conduct biochemical and medical experiments on a small chip. This requires much smaller...
In nanometer scale manufacturing, process variations have a significant impact on circuit performance. To handle them, post-silicon clock tuning buffers can be included into the circuit to balance timing budgets of neighboring critical paths. The state of the art is a sampling-based approach, in which an integer linear programming (ILP) problem must be solved for every sample. The runtime complexity...
This paper proposes that different electromagnetic sources have unique radiation characteristics. Thus, the radiation source type can be chosen as an important feature to train an artificial neural network (ANN) to predict the radiation of the sources. A new ANN model, including radiation source type and frequency as inputs were presented. The model took several seconds to train and calculate, and...
Physical Unclonable Functions (PUFs) are emerging as an important building block in hardware security. It has been widely used in key generation and authentication. However, Strong PUFs are vulnerable to the Machine Learning (ML) attack by modeling the challenge-response pairs (CRPs) behavior. The traditional resistant methods based on non-linear blocks (e.g. XOR) have a negative impact on the reliability...
Aspect extraction is one of the most important tasks for text mining. Semi-supervised methods have been proposed to solve this problem. However, the seed terms have to be given in advance in these methods. The current methods categorize the aspects without expanding more aspects terms. And most of the methods are based on English corpus, there is a great space for the research on the aspect extraction...
Conventional mobile robots can only overcome obstacles of limited height while hybrid mobile robots, which combine the wheeled motion and jumping motion, have better crossing obstacle capabilities. The excellent jumping abilities of hopping robots result from their core parts — the hopping actuators. In this paper, we propose a kind of hopping actuator powered by gas fuels, and explain its inner structure...
Rolling element bearings play an important role in ensuring the availability of industrial machines. Unexpected bearing failures in such machines during field operation can lead to machine breakdown, which may have some pretty severe implications. However, the insufficiency of labeled samples is major problem for handling fault diagnosis problem. To address such concern, we propose a semi-supervised...
In dynamic object detection, it is challenging to construct an effective model to sufficiently characterize the spatial-temporal properties of the background. This paper proposes a new Spatio-Temporal Self-Organizing Map (STSOM) deep network to detect dynamic objects in complex scenarios. The proposed approach has several contributions: First, a novel STSOM shared by all pixels in a video frame is...
The underactuated robotic hands have great adaptive ability in unstructured environments, especially for space irregular-shaped non-cooperative object grasping. Two kinds of underactuated robotic hands are presented in this paper, which have 12 degrees of freedom but using only 3 actuators. Although the shapes of target objects are unknown, they can be grasped very well by taking advantages of passive...
A clearance effect evaluation index system is presented in this paper. Based on the clearance effect evaluation index system and cost processing models, an integrated optimization method for mechanisms with clearance joints is proposed. As a case study, a planar 3-RRR parallel robot with clearance joints is investigated. On the basis of the optimization results, a prototype is designed and manufactured...
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