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This paper presents a cost-effective approach to design an embedded autopilot system for a 4-rotor aerial vehicle. The system is targeted for autonomous control research, and it consists of an onboard system and a ground station. The onboard system interfaces with the vehicle and provides data link for sensor measurements and control data. The ground station provides a user-friendly interface for...
To solve the non-uniformity problem of multi Time Delay Integral Charge Couple Device (TDICCD) mosaic camera, a non-uniformity correction algorithm is proposed and implemented on Field-Programmable Gate Array (FPGA) platform. Firstly, the generation and definition of non-uniformity are introduced; several common non-uniformity correction methods are discussed. Secondly, the correction algorithm is...
In order to solve the problem of that the initial investment of truck dispatching system is vast and how to quantify scientifically to analyze the technical factor of truck dispatching system. A truck real-time dispatching model was built based on two minimization dispatch criterion. The method of "Comparing different index setting Simulations Used by the Same Shift (CSUSS)" was put forward...
Researched on the characteristic of the traffic flow, a new method of abnormal data detection on traffic flow based on the curve-fitting is presented. First, the historical data on traffic flow are divided into the traffic flow with high speed and the traffic flow with low speed by the clustering analysis. Then, the algorithm on the determination safety zone scope is obtained by the curve-fitting...
Quality of service (QoS) provisioning generally assumes more than one QoS measure which implies that QoS routing can be categorized as an instance of routing subject to multiple constraints: delay-jitter, bandwidth, cost, etc. We study the problem of constructing multicast trees to meet the QoS requirements of real-time interactive applications where it is necessary to provide bounded delays and bounded...
This paper describes and deduces the theory of Haar-like features, Integral image and AdaBoost algorithm, which were proposed by Paul Viola, and then researches its improvement. We combine Microsoft Visual C++6.0 with OpenCV Function library to develop the software, and achieve the function of real-time face detection. According to experimental results, we can conclude that the improved algorithm...
In this paper, we present an effective parallel algorithm for polygonizing implicit surfaces. The algorithm can produces triangulation approximation of implicit surface with adaptive size of triangles according to the local curvature of the surface. Our algorithm first divides an given implicit surface into eight parts by subdividing its bounding box. Then, the algorithm finds a seed point for each...
In distributed real-time embedded systems (DRE), it is common to model an application as a set of task chains. Each chain is activated cyclically and must complete before an end-to-end deadline. Each task of the chain is bound to execute on a particular processing element. The complexity of designing and analyzing a DRE can be reduced by applying a component-based methodology: each pipeline can be...
In the design of time-critical applications, schedulability analysis can be used to define the feasibility region of tasks so that optimization techniques can find the best design solution that satisfies the deadlines. This method has been applied to obtain the optimal task implementation, priority assignment or placement of tasks onto CPUs in previous work. The definition of the feasibility region...
Real time control applications are very demanding in terms of closed loop system response. The challenge is to execute an operation in a predictable amount of time. As more control functions are needed, faster computing speed is preferred to achieve the desired control responses. The major processor manufacturers have given up trying to make processors run faster, at least for the time being. Instead,...
In this paper, we study task assignment strategy for multi-agent systems in which the task space grows sequentially. Many task assignment algorithms are based on the heuristic schemes that result in optimal performance, but in time-varying conditions, real-time assignment techniques are needed. In order to maximize the real-time performance, an auction algorithm is adopted and modified with D* lite...
The main objective of the current paper is to design and validate a sub sate observer which can communicate the health status of the stitching needle to the stitch controller in right time without any false alert signal using Microcontroller and CPLD interfacing. This has been achieved through a design methodology of a fault aware controller which can interact with a stitch controller for automatic...
The problem of real time scheduling spans a broad spectrum of algorithms from simple uniprocessor to highly sophisticated multiprocessor scheduling algorithm. This paper proposes a new novel scheduling algorithm to scheduler periodic task for soft real time systems.This is a planning based scheduler where tasks are scheduled on the basis of its instantaneous utilization.Here after every quantum of...
The Mellin transform (MT) is a form of a signal representation similar to Fourier transform (FT) which has been widely used in signal processing owing to its distinct properties like scale invariance. In this work, a 2D form of MT which is termed as 2D discrete Mellin transform (DMT) is introduced. The paper also proposes an area efficient, power aware and multiplier less VLSI architecture for 2D...
In order for the base station to respond quickly and efficiently to the uplink bandwidth request in broadband wireless access (BWA) networks using time-division duplex (TDD), a dual feedback control algorithm has recently been proposed. In this algorithm the bandwidth request is adjusted in accordance with both the length of the backlogged queue and the mismatch between packet arrival and service...
A real-time algorithm is presented to detect moving targets in underwater complex environment. The difference image is obtained by subtraction operation in frames of image sequence. An appropriate threshold is selected and the binary image of the difference image is obtained. Every part of the binary image is segmented into one single image by image segment algorithm. A definition of linear level...
Applications querying real time data streams in order to identify trends, patterns, or anomalies can often benefit from comparing the live stream data with archived historical stream data. This is especially true for applications involving live & unpredictable data like in traffic analysis & stock markets. However this data mining in DSMSs have turned out to be a costly proposition. In this...
When physically implemented, independent component analysis (ICA) algorithm can achieve a real time blind signal separation (BSS). However, due to the limited size of the hardware device in microelectronics technology, several constraints can be encountered to reach the real time processing since the application of the ICA algorithm requires the consumption of a huge number of input signal samples...
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