This paper shows usage of wavelet transform for condition evaluation of the rotating machinery by processing a signal of instantaneous angular velocity. One or more machine revolutions are used for the state evaluatio...
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This paper shows usage of wavelet transform for condition evaluation of the rotating machinery by processing a signal of instantaneous angular velocity. One or more machine revolutions are used for the state evaluation. Wavelet transformation is applied to form a feature vector which, transformed by a neural network into a fault vector, is used for the description of a rotating machinery condition. Results obtained with a 2 cylinder four-stroke piston diesel engine ČKD S110 are shown.
Magnetic flux leakage (MFL) is a method used in oil and gas piping systems which has potential in medical gas piping inspection, cleaning and gauging tasks without interrupting the pipeline transportation process. MFL...
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we propose a new perspective on the identification of linear dynamic system using structural similarity. The proposal consists in the meaningful exploration of each model, specifically behavior of the state variable. ...
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This paper deals with eccentricity fault detection in a induction motor via artificial neural networks. Discriminative features are extracted from magnitude-frequency plot of line current spectra at characteristic fre...
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The main goal of the paper is to introduce improved approach in posturography data set analysis and consequent evaluation. The result is achieved over ensemble empirical mode decomposition (EEMD). EEMD deals with data...
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ISBN:
(纸本)9781617389849
The main goal of the paper is to introduce improved approach in posturography data set analysis and consequent evaluation. The result is achieved over ensemble empirical mode decomposition (EEMD). EEMD deals with data as nonlinear and non-stationary stochastic process in centre of pressure (CoP) evaluation to obtain beneficially values.
Breath alcohol detector or better known as breathalyzer plays a vital role in monitoring alcohol concentration in a person's bloodstream. This project involves the design and development of breathalyzer device whi...
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ISBN:
(纸本)9781424471218;9781424471225
Breath alcohol detector or better known as breathalyzer plays a vital role in monitoring alcohol concentration in a person's bloodstream. This project involves the design and development of breathalyzer device which controls ignition switch. The hardware modules include the PIC16F877A microcontroller, alcohol sensor, LCD panel and ignition switch circuitry. The software component includes the programming and source code which is implemented via the PIC microcontroller. Upon assembly, the system is able to detect alcohol concentration in a person's breath sample and displays the detected amount in terms of BAC (Blood Alcohol Concentration) percentage on the LCD panel. Then, according to the amount, the system decides whether to enable or disable the ignition switch circuitry. The system can be very useful in enforcing the alcohol limit law.
The electromagnetic torquer is the most common method to generate torque for attitude control of low earth orbit (LEO) small satellite. Due to power consideration, an actuator saturation is one of serious problem in p...
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ISBN:
(纸本)9781424456062
The electromagnetic torquer is the most common method to generate torque for attitude control of low earth orbit (LEO) small satellite. Due to power consideration, an actuator saturation is one of serious problem in practice. In this paper, we propose the scheme to design the robust controller to stabilize a satellite attitude by considering the actuator saturation as a structured uncertainty which is based on integral quadratic constraint. The proposed robust controller is of linear time varying controller that has similar structure as conventional linear quadratic regulator (LQR). The simulation results show that our proposed robust controller outperforms an LQR controller.
In autonomous navigation systems, localization is the most important problem to be solved. In this note, we propose the algorithm to localize an unmanned ground vehicle (UGV) equipped with a global positioning system ...
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ISBN:
(纸本)9781424456062;9789746724913
In autonomous navigation systems, localization is the most important problem to be solved. In this note, we propose the algorithm to localize an unmanned ground vehicle (UGV) equipped with a global positioning system (GPS), an odometer and an electronic compass. The proposed scheme is based on the unscented Kalman filter (UKF). To improve the accuracy and robustness, the novel noise model of data from an electronic compass is incorporated in the system modeling. The performance of our simple algorithm is evaluated by the experimental results that strongly confirm the benefit even during GPS outage in some short period of time.
This paper discusses the ecological questions of operation of small-scale biomass fired boilers, focused on automated combustion of pellets. There is shown difference between mostly used on-off control and advanced co...
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ISBN:
(纸本)9789604742530
This paper discusses the ecological questions of operation of small-scale biomass fired boilers, focused on automated combustion of pellets. There is shown difference between mostly used on-off control and advanced continuous control with emphasis on controlling of release of gaseous emissions, mainly CO and hydrocarbons, and efficiency of the boiler. Results from measurement campaigns on experimental boiler with developed continuous controlsystem show optimization of grate movement with impacts on CO emissions. There is also discussed the issue of gradual sensor malfunction and proposed solution by model-based extension of controlsystem functionality.
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