In this study, a nonlinear system is controlled using a linear adaptive method. A nonlinear system is approximated a linear model at each operating point, and a control law is designed based on the approximated linear...
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ISBN:
(纸本)9781479948451
In this study, a nonlinear system is controlled using a linear adaptive method. A nonlinear system is approximated a linear model at each operating point, and a control law is designed based on the approximated linear model. To obtain a suitable linear model at each operating point, many linear models are simultaneously identified. However, the computation load for identifying many models is considerably heavy. Hence, many linear models are identified using General-Purpose computing on Graphics processing Units (GPGPU). In this study, the assessment of modeling performance is newly introduced. As a result, the control system is updated only when modeling performance is degraded, and frequent update of a control law can be avoided. Finally, numerical results are shown to demonstrate the effectiveness of the proposed method.
Ensuring the security of cloud data, computing and applications is an urgent task. The main methods of web-application development and existing ways to improve information security at all stages of product development...
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Faulty operations of Heating, Ventilation and Air Conditioning (HVAC) systems can lead to discomfort for the occupants, energy wastage, unreliability and shorter equipment life. Cost-effective Fault Detection and Diag...
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ISBN:
(纸本)9781479915590
Faulty operations of Heating, Ventilation and Air Conditioning (HVAC) systems can lead to discomfort for the occupants, energy wastage, unreliability and shorter equipment life. Cost-effective Fault Detection and Diagnosis (FDD) methods can therefore ensure an increase in the system uptime, reliability, and overall efficiency. In this paper, a simulation environment based on Matlab/ Simulink (R) is used in order to evaluate the performance of a FDD method using Support Vector Machines (SVMs). In detail, the proposed method is evaluated by performing extensive simulations to allow the investigation of the most common and relevant faults affecting this kind of systems.
This volume contains 137 papers. The subject matter covers topics in robotics, CIM and automation. Some of the topics discussed in various sessions are: petri nets;intelligent robots;factory automation;path planning;m...
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This volume contains 137 papers. The subject matter covers topics in robotics, CIM and automation. Some of the topics discussed in various sessions are: petri nets;intelligent robots;factory automation;path planning;mobile robots;CAD/CAM/CAT;robot control;vision systems;neural networks;novel computer technology;expert systems;knowledge based systems;fuzzy sets and learning process.
The impact of different baffles on liquid homogenization in crystallization process was described. In fermentation with crooked baffle, it was found that the flow field can provide more powerful driving force in the a...
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ISBN:
(纸本)9783642279652
The impact of different baffles on liquid homogenization in crystallization process was described. In fermentation with crooked baffle, it was found that the flow field can provide more powerful driving force in the axial direction. And combined with the radial driving force provided by the disc turbine, dead zone at the bottom of blades was also eliminated. Due to its certain degree of twist, the flow field in the fermentation with crooked baffle can not only provide axial driving force, but broke the double circulation. Therefore the flow field in crystallization reactor eventually was distributed very well with dramatic reduce of adhesion.
The efficient implementation of sensors and instrumentation devices is a prerequisite for the successful application of any process monitoring or control system task. However, wastewater treatment plants (WWTP) are no...
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ISBN:
(纸本)9788995003879
The efficient implementation of sensors and instrumentation devices is a prerequisite for the successful application of any process monitoring or control system task. However, wastewater treatment plants (WWTP) are notorious for poor data quality and sensor reliability problems due to the hostile environment, missing data problems and more. In spite of sensor failures, the monitoring system in WWTP should be fully operational, which requires a robust and reliable monitoring scheme. A novel process monitoring method combined with a sensor reconstruction scheme to tackle the sensor failure problems is proposed for sustainable biological wastewater treatment operation. The proposed method is applied to a single reactor for high activity ammonia removal over nitrite (SHARON) process. It shows robust monitoring performance in the presence of sensor faults and produces little false alarms. Moreover, it enables us to keep the monitoring system running in the case of the sensor failures. This guaranteed continuity of the monitoring scheme is a necessary development in view of real-time applications in full-scale WWTP's.
Chemical processes can be controlled using a continuous stirred tank reactor (CSTR) in process industries. A CSTR is a highly non-linear system and this non-linearity makes the chemical process unstable. This proposed...
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ISBN:
(纸本)9781538681909
Chemical processes can be controlled using a continuous stirred tank reactor (CSTR) in process industries. A CSTR is a highly non-linear system and this non-linearity makes the chemical process unstable. This proposed work deals with the temperature control of cascadedCSTR by implementing model reference adaptive control (MRAC) method based on MIT rule. Initially, a mathematical model was developed both in MATLAB and Simulink and the open loop response is obtained. The model was analyzed at steady state and dynamic state using the differential equations. A reference model was generated about the stable operating points of the CSTR. Proceeding, the adaptation scheme was implemented using MIT rule wherein the given two tank CSTR model was designed to adapt to the reference model. The adaptive control method provides satisfactory results and the performance of the control method is presented using Simulink and MATLAB.
In this paper, we investigated the problem of tuning individual loops in a multivariable controller. It is shown that the performance of a specific loop is related to a row in the controller matrix. Several interpreta...
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ISBN:
(纸本)9781424415304
In this paper, we investigated the problem of tuning individual loops in a multivariable controller. It is shown that the performance of a specific loop is related to a row in the controller matrix. Several interpretations of this relation are given. We also proposed an algorithm that estimates the model required for the tuning via a relay feedback experiment. The algorithm does not need any prior information about the system or the controller.
Water quality monitoring is essential for successful water resource management. The periodic analysis provides for the assessment of water and the identification of changes or trends in water quality over time. When i...
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Expression of gene block, with the GPU parallel thread structure characteristic calculation, according to the structural characteristics of GPU thread design of double parallel mode, and the use of texture cache memor...
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ISBN:
(纸本)9781538639818
Expression of gene block, with the GPU parallel thread structure characteristic calculation, according to the structural characteristics of GPU thread design of double parallel mode, and the use of texture cache memory to achieve high efficiency;on the basis of CPU two level cache capacity of basic blocks further subdivided into sub blocks to improve the cache hit rate, the technology to reduce the number of memory accesses the use of data, reduce the thread migration in the core between the use of thread binding technology;according to the calculated capacity allocation of multi-core CPU and GPU CPU and GPU gene in the mutual information calculation task to calculate the load balance of CPU and GPU;in the design of the new threshold calculation algorithm based on the design and implementation of memory efficient construction of global gene control network CPU /GPU parallel algorithm. The experimental results show that compared with the existing algorithms, this algorithm speed is more obvious, and is able to build more large-scale global gene regulation control network.
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