Multiple input control strategies for robust and adaptive climate engineering in a low order 3-box model

A low-order 3-box energy balance model for the climate system is employed with a multivariable control scheme for the evaluation of new robust and adaptive climate engineering strategies using solar radiation management. The climate engineering measures are deployed in three boxes thus representing northern, southern and central bands. It is shown that, through heat transport between the boxes, it is possible to effect a degree of latitudinal control through the reduction of insolation. The approach employed consists of a closed-loop system with an adaptive controller, where the required control intervention is estimated under the RCP4.5 radiative scenario. Through the online estimation of the controller parameters, adaptive control can overcome key issues related to uncertainties of the climate model, the external radiative forcing and the dynamics of the actuator used. In fact, the use of adaptive control offers a robust means of dealing with unforeseeable abrupt perturbations, as well as the parametrization of the model considered, to counteract the RCP4.5 scenario, while still providing bounds on stability and control performance. Moreover, applying multivariable control theory also allows the formal controllability and observability of the system to be investigated in order to identify all feasible control strategies

Thermal Management of Electrified Vehicles—A Review

Vehicle electrification demands a deep analysis of the thermal problems in order to increase vehicle efficiency and battery life and performance. An efficient thermal management of an electrified vehicle has to involve every system of the vehicle. However, it is not sufficient to optimize the thermal behavior of each subsystem, but thermal management has to be considered at system level to optimize the global performance of the vehicle. The present paper provides an organic review of the current aspects of thermal management from a system engineering perspective. Starting from the definition of the requirements and targets of the thermal management system, each vehicle subsystem is analyzed and related to the whole system. In this framework, problems referring to modeling, simulation and optimization are considered and discussed. The current technological challenges and developments in thermal management are highlighted at vehicle and component levels

Manajemen Sistem Scheduling / Penjadwalan Penggunaan Peralatan Laboratorium Teknik Mesin Universitas Riau Berbasis Komputer

The scheduling has an important role as a form of decision making. Mechanical Engineering Laboratory of University of Riau is a place to conduct some educational activities such as courses practice, experimental of laboratory, scientific research, teaching practice etc. Therefore, it is necessary to adopt the management information system for scheduling of laboratory equipments. This research aim is to design and develop a system to manage scheduling of data equipments in Mechanical Engineering Laboratory of University of Riau. The laboratory equipments scheduling system in Mechanical Engineering, University of Riau has grooves to come job as dynamic scheduling, which uncertain process the arrival of data equipments, either the number or its arrival. Method in this research used the dynamic scheduling of First Come First Served (FCFS) to determine the priority for decision making. Subsequence, this method was execution of sequence order based on the fastest time of arrival of orders. Developing of an application program used MySQL as database and PHP (Hypertext Preprocessor) as a programming language. Based on the results of testing of the application software were obtained an optimal performance for the management system of scheduling equipments in Mechanical Engineering Laboratory, University of Riau. In conclusion, the new system provided a faster, efficient and accurate of equipments data management in the Mechanical Engineering Laboratory, University of Riau

COST-S: a new methodology and tools for sewerage asset management based on whole life costs

This is the final version of the article. Freely available from IWA Publishing via the link in this record.This paper discusses the development of a methodology and software tools aimed at assisting management decisions in order to provide acceptable performance at a minimum cost over the whole life of the sewerage system. Whole Life Costing (WLC) approaches have been shown to offer an ideal platform to provide investment and operational management tools that take account of the timing of interventions, system behaviour and performance all within a sensible economic and engineering framework. The need for such a methodology and the requirements for its useful implementation are introduced first. The paper then describes how research collaboration between the UK Water Industry and two UK research centres (Centre for Water Systems at Exeter University and Pennine Water Group at Universities of Sheffield and Bradford), and supported by the UK Engineering and Physical Sciences Research Council grant, resulted in an innovative, practical and auditable methodology with associated tools for better proactive management of ageing and rapidly deteriorating sewerage systems.The authors would like to acknowledge the generous support of EPSRC (Project No.GR/M16122/01 and GR/R98617/01) as well as that of the industrial collaborators;AWG, Northumbrian Water,Thames Water Services,United Utilities and Yorkshire Water Services

Evaluating flood control and drainage management systems from a productive efficiency perspective : a case study of the southwest coastal zone of Bangladesh

PhD ThesisPerformance evaluation of flood defence systems is invariably carried out from an engineering perspective overlooking the productivity perspective, thereby leaving a gap in the literature of performance evaluation in the water resources management sector. Two competing flood control and drainage management (FCDM) systems, namely, the ‘silt-dredging and regulative-drainage management (SRM)’ and the ‘tidal river-basin management (TRM)’ systems were implemented in the Southwest coastal zone of Bangladesh as safeguards to protect agricultural production. There is a longstanding debate over the appropriateness of these systems in terms of providing conditions for sustainable agriculture. The lead executing agency, Bangladesh Water Development Board, was adamant to implement the hard engineering structural system, the SRM, while the stakeholders (i.e., the farmers and the fisher folk) insisted on the non-structural system, the TRM. However, this work evaluates these two contrasting and competing FCDM systems in terms of productive efficiency, in order to address primarily the gap in the literature of performance evaluation. The study develops separate econometric models for paddy production and fisheries production with each of the FCDM systems and estimates these models using stochastic frontier analysis to obtain technical efficiency (TE), yield-gap and potential yield increment (PYI) for paddy production, and cost efficiency (CE), cost-gap and potential cost saving (PCS) for fisheries production. The study results reveal that mean TE, CE, yield-gap and cost-gap are respectively 0.782, 0.807, 719.181 (kg) and 12542.71 (tk) with the SRM system, while these estimates are 0.769, 0.762, 807.324 (kg) and 14440.39 (tk) with the TRM in order. These findings indicate that SRM system marginally outperforms TRM system in terms of agricultural productivity. This is despite the SRM being more expensive to deliver, as well as the fact that, due to rise of relative sea-level with the SRM system, it is likely to become increasingly more expensive in the future. In contrast, the TRM system benefits from counteracting the rise of relative sea-level through land accretion by sedimentation in the floodplains in an environmentally friendly way, keeping the maintenance costs low

Implementing Management Systems and Demand Driven MRP concepts: A Project Based Learning experience in Industrial Organization Engineering

[EN] This research work presents an experience of the Faculty of Engineering of Mondragon Unibertsitatea using Project Based Learning (PBL) with the students of 4th semester of Bachelor's Degree in Industrial Organization Engineering (IOE). The PBL delved into the concepts developed in the subjects of Management Systems and Production Logistics. The project was contextualized in a company that produced parts for the automotive sector. Teams of students implemented a management system that enabled the efficient management of materials and the production process using tools such as Demand Driven MRP (DDRMP). As a result, they had to solve the proposed problem, develop a simulation and choose the proposal that best met the needs of the company. In order to assess PBL performance a survey was carried out. The results confirmed that the experience was positive since the achieved knowledge provided a meaningful learning experience for the students, while facilitating the development of both technical and transversal competences. http://ocs.editorial.upv.es/index.php/HEAD/HEAD18Kortabarria, A.; Elizburu, A. (2018). Implementing Management Systems and Demand Driven MRP concepts: A Project Based Learning experience in Industrial Organization Engineering. Editorial Universitat Politècnica de València. 543-550. https://doi.org/10.4995/HEAD18.2018.8033OCS54355

Continuous process improvement applied to an engineering education system

The Engineering education is considered to be a system. Most engineering education systems are under pressure to meet the demands set by its government and private industries . While an expensive student throughput increase is possible, continuous improvement of the education system at all levels will be a more feasible and realistic approach. Within the operation management community a multitude of process improvement champions are competing for the attention of managers (or organisaion leaders). Each champion advocates the adoption of thier improvement methodology. Almost all plead that if one can adopt their specific tools or follow a specific way of thinking, all operation problems can be solved. Most managers (leaders) are however still confused to select the best process improvement methodology for their situation or system’s culture. In this research study several process improvement methodologies were evaluated and related to issues in an engineering education system. The objective is to support heads of an engineering education system with strategic operation decisions to meet future demands. Working through the apparent conflicting claims of performance improvement programs, it was found to critical to concentrate on the primary and secondary effects of these programs. Although each improvement methodology can contribute valuable approaches to an engineering education system, it is still found to be a challenge for leaders to define quality education and set targets for continuous improvements. The finding of this study illustrates that the various continuous improvement process methodologies can be utilised at various levels of the engineering education system. In order to fully maximise the effectiveness of the improvement methodology or initiative the system must be transformed from the traditional engineering education system to a more innovative system which includes process improvement as part of its culture