Model Prediction-Based Approach to Fault Tolerant Control with Applications

Abstract— Fault-tolerant control (FTC) is an integral component in industrial processes as it enables the system to continue robust operation under some conditions. In this paper, an FTC scheme is proposed for interconnected systems within an integrated design framework to yield a timely monitoring and detection of fault and reconfiguring the controller according to those faults. The unscented Kalman filter (UKF)-based fault detection and diagnosis system is initially run on the main plant and parameter estimation is being done for the local faults. This critical information\ud is shared through information fusion to the main system where the whole system is being decentralized using the overlapping decomposition technique. Using this parameter estimates of decentralized subsystems, a model predictive control (MPC) adjusts its parameters according to the\ud fault scenarios thereby striving to maintain the stability of the system. Experimental results on interconnected continuous time stirred tank reactors (CSTR) with recycle and quadruple tank system indicate that the proposed method is capable to correctly identify various faults, and then controlling the system under some conditions

Bibliographic Review on Distributed Kalman Filtering

In recent years, a compelling need has arisen to understand the effects of distributed information structures on estimation and filtering. In this paper, a bibliographical review on distributed Kalman filtering (DKF) is provided.\ud The paper contains a classification of different approaches and methods involved to DKF. The applications of DKF are also discussed and explained separately. A comparison of different approaches is briefly carried out. Focuses on the contemporary research are also addressed with emphasis on the practical applications of the techniques. An exhaustive list of publications, linked directly or indirectly to DKF in the open literature, is compiled to provide an overall picture of different developing aspects of this area

Improved Distributed Estimation Method for Environmental\ud time-variant Physical variables in Static Sensor Networks

In this paper, an improved distributed estimation scheme for static sensor networks is developed. The scheme is developed for environmental time-variant physical variables. The main contribution of this work is that the algorithm in [1]-[3] has been extended, and a filter has been designed with weights, such that the variance of the estimation errors is minimized, thereby improving the filter design considerably\ud and characterizing the performance limit of the filter, and thereby tracking a time-varying signal. Moreover, certain parameter optimization is alleviated with the application of a particular finite impulse response (FIR) filter. Simulation results are showing the effectiveness of the developed estimation algorithm

Human papillomavirus is detected in transitional cell carcinoma arising in renal transplant recipients

"This is a non-final version of an article published in final form in Pathology The Journal of the Royal College of Pathologists of Australasia 41 (3) pp.245-247"Aims: We investigated the role of human papillomavirus HPV in the development of transitional cell carcinoma TCC arising in renal transplant recipients. Methods: Genomic DNA was extracted from 10 m paraffin embedded sections of five TCCs arising in five renal transplant recipients using the QIAamp DNA mini kit according to the manufacturer's instructions. β-globin PCR was performed to test DNA adequacy. Samples were tested for the presence of HPV DNA by broad spectrum HPV PCR method using non-biotinylated SPF10 primers SPF1A, SPF1B, SPF1C, SPF1D, SPF2B, SPF2D which amplify a short 65 bp fragment. Positive bands were identified on a 3 gel. Positive samples underwent a second HPV PCR and were amplified using biotinylated SPF10 primer set, which amplifies the same 65 bp region of the L1 open reading frame. INNO-LiPA line probe assay was then performed to genotype the samples which uses a reverse hybridisation principle. Results: Four of five TCCs examined were positive for HPV. The high risk HPV16 was detected in three cases whereas in the fourth case an unclassifiable HPV genotype was present. In all DNA samples, β-globin amplification was successful. Conclusions: Our results indicate that HPV and in particular HPV16 may play an aetiological role in the development of TCC in renal transplant patients.Peer reviewedSubmitted Versio

Development of a Programmable Logic Controller Based Control System for a Water Plant

     The primary objective of this study is to use programmable logic techniques to control the operation of water sucking pumps to supply Bait Elmal plant from the S stream. Basically the proposed system works as follows: the raw water sucking pumps controlled by level sensors inside the water reservoir. The sand filter washing process is automatically initiated by level sensors installed inside the filter basin. Some are used to measure water flow rate and turbidity for adjusting the addition of chemicals    Practically the reservoir has been controlled by using two sensors connected to the raw water pumps through a Programmable Logic Controller (PLC). The filter washing  process valves are open and closed automatically by a signal coming from a control unit. The readings of flow rate, pH, and turbidity devices are used as inputs to the PLC with the aid of a program designed for automatically adjusting the addition of chemical materials      Finally, a complete control system has been successfully tested, where the sucking pumps are installed to supply Bait Elmal water plant from the river Nile. The result obtained prove the reliability and applicability or the system with more advantages at Bait Elmal plant or any similar drinking water plant

A study on Strengthening of Building foundation for Storey Extension

Storey extensions are an increasingly popular way to crowded cities. Lack experience and knowledge concerning strengthening of structures are major challenges for engineers. This paper presents strengthening practice adopted for foundations of existing building when storey extension is needed. Literature concerning strengthening techniques commonly adopted and some historical cases were reviewed. A complex hall building in university of Khartoum which was rehabilitated in 2009 by strengthening the structural members of the existing building to accommodate additional floors was undertaken as a case study. The records and reports of the original design and last rehabilitation of the building were reviewed. Field inspection of the building condition before rehabilitation was carried out. The study results showed that the appropriate design, the strengthening materials used and the procedure followed are the key factors for economical and successful strengthening

Method of Coating a Substrate with a Metal Oxide Film from an Aqueous Solution Comprising a Metal Cation and a Polymerizable Organic Solvent

A method for preparing a substrate coated with a polycrystalline, metal oxide film using polymeric precursors. The oxide films prepared by the method of the present invention are dense (i.e., substantially free of cracks and pinholes) and may be used, for example, as an electrolyte or electrode in intermediate temperature solid oxide fuel cells (SOFCs) or as gas separation membranes

Metal Chelates of Diacetylacetanilide

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