Creep resistance is one of the important properties of the sealing material,which is the main factor affecting the life of the *** are many factors influencing on the creep properties due to the fact that non asbestos...
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Creep resistance is one of the important properties of the sealing material,which is the main factor affecting the life of the *** are many factors influencing on the creep properties due to the fact that non asbestos gasket materials is a kind of composite material of multiple *** theoretical research,experimental study and the establishment of mathematical model of the creep are the popular *** this paper,based on non-asbestos gasket materials,through the combination of 5 Kelvin model and 1 Maxwell model series,the creep constitutive equation of non-asbestos gasket materials at constant temperature under constant load condition was established,and the creep properties was tested and *** is shown from the results that the creep model can be used to reflect the creep characteristics of the *** obtained creep curve shows that the creep of the gasket mainly occurs in the initial 10 *** the increase of stress,the initial deformation of the gasket increases,and the deformation of the gasket increases with the increase of *** the same time,the creep variable fitting shows a relatively well log curve characteristic,so the creep data can be fitted by the log curve.
A green roof is a roof of a building that is covered from a vegetation. Green roofs are beneficial in number of ways for buildings. Crops in green roofs are exposed to direct solar radiation and strong winds. Furtherm...
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ISBN:
(纸本)9781509053957
A green roof is a roof of a building that is covered from a vegetation. Green roofs are beneficial in number of ways for buildings. Crops in green roofs are exposed to direct solar radiation and strong winds. Furthermore, the substrate is shallow and it can hold limited amount of water. Therefore, artificial irrigation methods are required especially for green roofs in tropical countries. This paper proposes a novel irrigation controlling method for green roof based on predicted evapotranspiration. The system is capable of predicting the evapotranspiration and deciding the amount of water to be irrigated based on that. The rationale behind the proposed method is also explained. Particulars on designing and developing a prototype irrigation controller and a laboratory test bed for experimenting with green roofs are presented. Experiments have been carried out and the experimental results are discussed in order to analyze the performance of the proposed system. The experimental results validate the applicability of the proposed system.
WCDMA mobile technology has emerged as the prominent Third Generation (3G) Cellular systems technology to meet the high end requirements and challenges to help provide promising and efficient services which fulfills t...
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Electric power systems will need to accommodate large amounts of renewables and a growing number of DC loads with reduced costs and losses. Medium-voltage DC distribution lines can play a key role. Moreover, a higher ...
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Hovering autonomous underwater vehicle (HAUV) play an important role in short distance underwater inspection mission. There are a lot of disturbances and uncertainties underwater, a robust control is needed to minimiz...
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ISBN:
(纸本)9781479982523
Hovering autonomous underwater vehicle (HAUV) play an important role in short distance underwater inspection mission. There are a lot of disturbances and uncertainties underwater, a robust control is needed to minimize the effects of external influences on HAUV's system behaviour, subjects to the constraint of not having a complete representation of the HAUV system. This paper describes the development of robust sliding mode depth control of a thruster propelled HAUV. Simulation results are presented to illustrate the performance of designed sliding mode depth control.
Home service robot works in unstructured environments with various tasks, where a low-cost, dexterous, and intrinsically safe manipulator is important. Traditionally, a redundant manipulator with high degrees of freed...
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Active disturbance rejection controller has distinguished performance on restricting uncertain disturbances. However, setting ADRC parameters is a time consuming task and depends strongly on operator's experience....
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ISBN:
(纸本)9781479982523
Active disturbance rejection controller has distinguished performance on restricting uncertain disturbances. However, setting ADRC parameters is a time consuming task and depends strongly on operator's experience. In this paper, we propose an approach for computing the ADRC parameters based on clonal selection algorithm (CSA). To validate this method, we build a MATLAB simulation for an UAV longitudinal channel control. Moreover, good results are obtained when we compare our approach to the one based on GA optimization. This work can be used to set parameters automatically, making the design of UAV controller more efficient.
On-line measurement of pulverized fuel (PF) distribution between primary air pipes on a coal-fired power plant is of great importance to achieve balanced fuel supply to the boiler for increased combustion efficiency a...
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ISBN:
(纸本)9781467392204
On-line measurement of pulverized fuel (PF) distribution between primary air pipes on a coal-fired power plant is of great importance to achieve balanced fuel supply to the boiler for increased combustion efficiency and reduced pollutant emissions. An instrumentation system using multiple electrostatic sensing heads are developed and installed on 510 mm bore primary air pipes of a 600 MW coal-fired boiler for the measurement of mass flow distribution of PF. An array of electrostatic electrodes with different axial widths is housed in a sensing head. An electrode with a greater axial width and three narrower electrodes are used to derive the electrostatic signals for the determination of PF mass flow rate and velocity, respectively. The measured PF velocity is used for the calibration of coal mass flow rate. On-plant comparison trials of the developed system were conducted under typical operating conditions. Isokinetic sampling equipment is used to obtain reference data to evaluate the performance of the system. Experimental data demonstrate that the developed system is effective and reliable for the on-line continuous measurement of PF mass flow distribution between the primary air pipes of the same mill.
This paper presents the extensions added to the measurement and monitoring tool TestelDroid, to support remote control and instrumentation of Android devices. The extensions include support for Standard Commands for P...
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In this paper, the design of nonlinear observer-based dynamic controller for Nonlinear Networked controlsystems (NNCS) will be presented on the assumption that there exist packet loss between the sensor and the contr...
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ISBN:
(纸本)9781479982523
In this paper, the design of nonlinear observer-based dynamic controller for Nonlinear Networked controlsystems (NNCS) will be presented on the assumption that there exist packet loss between the sensor and the controller and between the controller and the actuator. Two different linear function of a stochastic variable satisfying a Bernoulli random binary distribution will represent the existence of the packet loss. The formulation of NNCS problem will be reduced to solving Linear Matrix Inequality (LMI). Finally, a demonistrative example will be presented to show the effectiveness of the proposed LMI approach.
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