In order to improve the electricalautomationcontrol ability, the computer application technology is used to design the electricalautomationcontrol system. the system design includes two major modules: control algo...
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the speech disordered persons will be in the position to produce hoarse speech. In this paper we focused to convert and reconstruct the hoarse speech to a normal speech by using mel frequency cepstral coefficients (MF...
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the research field of wireless sensor networks is a challenging area of engineering and science. In contrast to most traditional networks, sensor nets of wireless sensor networks encompass numerous small battery power...
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ISBN:
(纸本)9781424446889
the research field of wireless sensor networks is a challenging area of engineering and science. In contrast to most traditional networks, sensor nets of wireless sensor networks encompass numerous small battery powered autonomous devices which are referred to as the sensor nodes. these devices have data processing and short range radio communication capabilities. Each node relies on the wireless channels for transmitting data and receiving data from other nodes. the deployment of sensor nodes is subject to various types of harsh environments. Wireless sensor networks differ in network densities, from sparse to dense deployments, which requires the adaptive protocols. On the other hand, small scale and low energy wireless devices are needed for communication. the combination of computing, sensing and communication technologies makes it possible. Withthe dense network deployment, broadcasting by simple flooding will lead to information redundancy. It gives rise to the application of adaptive topology control to the wireless sensor network. the maximum distance of the individual node could communicate with each other is characterized by the communication units on the sensor node. the location performance and energy usage, based on communication distance, can be evaluated by the Kalman filter which exploits the different selection approaches. In this article, topology control of the wireless sensor networks via integration of Kalman filters and adaptive estimation has been proposed for the design of wireless sensor networks.
this paper addresses the constraint analysis and determination of the twists inside singularity of parallel mechanisms to rely on the theory of screws. Moreover, modeling of working space and parametrical optimization...
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Autonomous mobile robot is a relatively advanced kind of modern robot equipment, with obvious characteristics of intelligence and automation. In the actual application process of autonomous mobile robots, in order to ...
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this paper deals with supervisory control of Discrete Event Systems (DES) by state feedback in order to avoid uncontrollable specifications and blockings. It incorporates two levels of modeling that includes the syste...
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ISBN:
(纸本)9781424446889
this paper deals with supervisory control of Discrete Event Systems (DES) by state feedback in order to avoid uncontrollable specifications and blockings. It incorporates two levels of modeling that includes the system and specification model and secondly the interpretation of the specification model in term of the system model based on trace equivalence. Next the controller process is computed. In this approach the specification and the system model are described by Interpreted Petri nets (IPN), and the specification describes a state subset that the specification must reach. It also captures the order, in which these states must he reached. the method to interpret the specification language in term of the system language includes structural information of both IPN (system and specification) to define trace equivalence, which to avoid blocking and uncontrollability. Moreover, this work presents a technique to modify trace equivalence based on the inclusion of uncontrollable events to guarantee controllability (compute of the infimal controllable language).
Aiming at the problem that the traditional cost estimation model can not accurately estimate the complex construction cost, this paper puts forward the whole cycle cost control strategy of construction engineering bas...
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ISBN:
(纸本)9781665432634
Aiming at the problem that the traditional cost estimation model can not accurately estimate the complex construction cost, this paper puts forward the whole cycle cost control strategy of construction engineering based on BIM. through the feasibility analysis of the whole life cycle cost management, this paper introduces BIM into the cost management, and studies the value of BIM in the key process of the whole construction project according to different dimensions and directions. then, combined with practice, BIM model standard is established to meet the requirements of engineering quantity calculation specification, and dynamic connection of different stages of engineering project life cycle is also proposed. the results of case analysis show that the scheme in this paper can process the information of engineering quantity quickly and accurately, so that the whole process cost management based on BIM can be performed in real time, dynamically and accurately, saving costs for all parties.
this work describes the problem of the unbalance response compensation in a rotor-bearing system using two control techniques based on measurements of the radial displacements or accelerations directly in a Magnetorhe...
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ISBN:
(纸本)9781424446889
this work describes the problem of the unbalance response compensation in a rotor-bearing system using two control techniques based on measurements of the radial displacements or accelerations directly in a Magnetorheological (MR) bearing suspension. the rotor-bearing system is modeled using Finite Element Methods (FEM) for a Jeffcott-like rotor with one planar disk, two nonorthotropic supports, one traditional journal bearing and other similar but supported on an arrangement with two MR dampers. the mathematical model consists of two finite elements, with a total of 6 degrees of freedom for each horizontal and vertical direction. For the rotating speed regulation a PID control, is applied in order to track a proper speed profile to pass over the first critical speeds (run-up or coast down). control schemes to compensate the unbalance in the rotor are: a Positive Position Feedback (PPF) control, which requires only the measurement of one radial displacement in the MR suspension, and another scheme based on the measurement of the radial acceleration, known as Positive Acceleration Feedback (PAF). Bothcontrol schemes require only one sensor (proximitor or accelerometer) for each control input and they demand small control efforts. For the control design and physical implementations, we use the socalled Choi-Lee-Park polynomial model for both MR dampers, which can adequately describe the highly nonlinear and hysteresis behaviors for this type of actuators. Finally, by means of some numerical simulations are illustrated the dynamic and robust performance of the overall control system.
the present study concerns withthe load frequency control (LFC) of two-area interconnected power system (TAIPS). this study introduces a novel control methodology of plug-in electric vehicle (PEV) for LFC under both ...
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this article makes use of a damper control system to maximize the output power of a wind power system while minimizing variations in frequency damping. the controller, which is dependent on wind speed and frequency fl...
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