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

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

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

Pengaruh Persepsi Kualitas Pelayanan, Kualitas Produk dan Harga terhadap Loyalitas Pelanggan Flexi di Kota Semarang dengan Intervening Kepuasan Pelanggan

Technology development and operator increase as PT Telkom competitors make scope of market and customers fewer in number because of customers inloyalty. In accordance with this background, the research was made to find out the case of Flexi product's decline. To maintain customers, we need to create our customer's loyalty by improving our quality of service, quality of product and price. Improvement of those qualities and price will influence our customer's satisfaction. And in the end, it will increase our customer's loyalty

Menemukan Kembali Kapital Sosial Bangsa Indonesia

As a nation-state, Republic of Indonesia has been having the long history. Come from inequality and plurality of tribes, ethnics, and religions; Indonesia effort to fight against Colonialism. In history, this struggle doesn't success before declared Sumpah Pemuda. All of youth organizations in Indonesia declare a vow that Indonesia is one nation, one language and one motherland. This declares is the first movement toward Indonesian unity. In otherwise, Sumpah Pemuda is basic for the power of social capital of Indonesia. In recent time, to fight against all of nationality problems, we must find the power of social capital again. This article further argues that Indonesia has abstract systems – especially Pancasila – as basic and keeper for social capital of Indonesia

Pemodelan Minimize Total Biaya Pengendalian Kualitas terhadap Proses Manufakturing Produk Furniture

Pengendalian kualitas merupakan USAha preveentif (pencegahan) sebelum terjadi kesalahan, dan mengarahkan agar kesalahan tidak terjadi. Persoalan pengendalian kualitas adalah bagaimana menjaga dan mengarahkan agar produk dan jasa dapat memenuhi standar kualitas yang direncanakan. Tujuan penelitian ini untuk (1). Memecahkan masalah kerusakan produk dengan metode SQC (Statistical Quality Control), (2). Menentukan biya kualitas total minimum (minimize total cost quality) yang meliputi QCC (Quality Control Cost) dan QAC (Quality Assurance Cost). Penelitian dilakukan dengan metode observasi secara mendalam (indept observation), pengumpulan data secara langsung pada obyek observasi yaitu pengendalian kualitas pada proses manufaktur produk furniture, analisis data menggunakan formula statistiscal Quality Control (SQC) untuk mengetahui batas control atas (UCL) dan batas control bawah (LCL) yang dilengkapi dengan control chart. Hasil analisis control charts menunjukkan bahwa rata-rata kerusakan produk sebesar 2,6 % dari 96.500 produk yang diperiksa. Uper Control Limit (UCL) sebesar 3,1 %, Lower Control Limit (LCL) 2,1 %. Total biaya minimum kualitas sebesar Rp. 18.909.379 yang terdiri dari Quality Control Cost sebesar RP. 9.456.579 dan Quality Assurance Cost sebesar Rp. 9.452.800. Sedangkan análisis intensitas pengendalian kualitas yakni produk rusak yang benar-benar terjadi sebanyak 2.531 unit, jumlah produk rusak yang dikehendaki yaitu yang menanggung biaya kualitas terendah (q*) sebanyak 3.376 unit

Karakteristik Kekuatan Bending Dan Kekuatan Tekan Komposit Serat Hybrid Kapas/gelas Sebagai Pengganti Produk Kayu

Wood material is very popular in Indonesia and all over the world, there are so many people who use it as their buildings contruction and also for their home tools, because the wood material is strong, long lasting, green living, save and lux. On the other hand the wood material will be mouldy if it meets water, thats why this material is not suitable to be placed in humid or wet places we need a new material that can be used as the subtitution of the wood material. The aim of this research is to know about how to make the composite of cotton/glass hybrid fiber and its mecanical using epoxy matrix, and then compare it with wood product. The wood product that used in this research is mahoni. The composite making is using hand lay-up method and the variety fraction volume of cotton fiber and glass fiber are : 30% : 0%, 25% : 5%, 20% : 10%, 15% : 15%, 10% : 20%, 5% : 25%, 0% : 30 %, the epoxy matrix volume fraction is 70 %, where the orientasion of cotton fiber is rondom and 2 cm in lenght, whereas the orientasion of the glass fiber is equally with fiber lenght up to the lenght of mould. The researcher did some test they are: bending test that based on ASTM D 790 standart, compression test that based on ASTM D 695 standart. The bending strenght's mean of all volume fraction's varieties of cotton/glass hybrid fiber composite shows the higher bending strenght than the bending strenght of mahoni which is used as the comparator. Afterwards the pressing strenght's mean of cotton/glass hybrid fiber composite especially in  20%:10% and 0%:30% fraction volume varieties, which is have the values orderly 37,74 MPa and 47,53 MPa, and it shows the higher pressing strenght than the pressing strenght of mahoni, it is 36,78 MPa. Based on the recearch that have been done we can conclude that the characteristic of mechamical cotton/glass hybrid fiber composite can be used as the (alternative) wood subtitution especially mahoni