The invention provides a digital control system, relates to the technical field of communication, and solves technical problems of enhancement of communication capacity and communication reliability. The system comprises a back board, and multiple generable logic cards and multiple signal backward-transmission modules which are interconnected with the backboard. All the general logic cards are divided into multiple logic card sequences, wherein one of the logic card sequences is an S sequence, and other logic card sequences are T sequences. In the T sequences, each general logic card is interconnected with all the general logic cards in the same sequence in a point-to-point communication mode and interconnected with the general logic cards of the corresponding positions in other T sequences in the point-to-point communication mode. In the S sequence, all the general logic cards are interconnected in the point-to-point communication mode, and each general logic card is interconnected with the general logic cards of the corresponding positions in all the T sequences in the point-to-point communication mode. The system is great in communication capacity and communication reliability.

Digital control system

Rooftop (RT) solar in India has grown to 4.4 GW by the end of March 2019 – but it is still under-performing vs national solar mission target of 40 GW. This paper aims to understand the drivers of the purchase intent (PI) for RT solar will enable policymakers to improve the penetration of this new and promising green technology.,This paper builds a structural equation modeling model for triggers of the PI of a residential RT solar photo-voltaic (SPV) buyer. The empirical study conducted in Delhi/national capital region of Delhi and Bangalore validates the role of the Unified Theory of Acceptance & Use of Technology (2) constructs in the PI of the residential sector RT solar buyer in India. It also explores a few myths – prior green habits have no relationship with the PI and self-efficacy has been dropped in the final path analysis to improve model fit.,This research explores the myth that financial self-efficacy – or prospect’s perception of his capability to fund (through own or credit finance) – will mean that the prospect is likely to be more conducive to an SPV purchase in the city contexts studied. It is more relevant for policymakers to work on factors such as social influence/ beliefs, effort expectancy and price-value beliefs. Other relevant triggers are performance expectancy, hedonic motivation and environmental beliefs.,This is the first Indian research leveraging multi-city survey of actual households build an empirically verified consumer behavior model for RT SPV in the residential sector leveraging the unified theory of acceptance and use of technology 2 constructs.

Diffusion of residential RT solar – is lack of funds the real issue?

/pdf/learning-that-sustains-the-use-of-an-appropriate-technology-2juh2lmjzo.pdf

Learning that Sustains the Use of An Appropriate Technology: A Case Study of Residential Solar Energy

Modelling energy-efficient renovation adoption and diffusion process for households: A review and a way forward

Purpose – The conceptualisation of technology adoption has largely been based on the Bass or some Bass-derived model – notably, the logistic model. Logistic-type models offer limited insights regarding the adoption process dynamics or the utility value of their results. The purpose of this paper is to outline an alternative technology adoption framework based on complex adaptive networks. Design/methodology/approach – An agent-based methodological approach is proposed. In it the actors, factors, goals, and adaptive learning influences driving solar energy technology adoption (SETA) process are first substantiated by empirical evidence gathered using field questionnaires and then incorporated in the simulation of a dynamic complex adaptive network of SETA. The complex adaptive network model is based on simple heuristic rules applied using a modified preferential attachment scheme within a NetLogo simulation environment. Findings – The interim results suggest an emergent network where prominent hub “driver”...

Modeling of technology adoption in Botswana

This paper proposes a strategy for the analysis and design of a nonlinear robust control system with variable parameters. A digital robust controller is implemented in the system. The approach for the controller design is founded on introduction of system compensation with two degrees of freedom. As a result, the targeted robustness of the system is achieved. The system’s stability and robust assessment is based on the interaction between its nonlinear and linear sections. D-partitioning, timeresponse and describing function analyses are implemented before and after the robust compensation. These analyses demonstrate significant improvement of the system performance in terms of insensitivity to variations of the system parameters. The digital robust controller is build of microcontrollers, based on the difference equations of its sections.

https://www.actapress.com/PaperInfo.aspx?paperId=454693

Strategy for analysis and design of a digital robust controller for nonlinear control systems

The movement of the earth leads to constant change in the intensity and the angle of solar irradiation. As a consequence, the cells of photovoltaic (PV) modules are only able to convert a fraction of the light energy from the sun into electric energy. A tracking system constantly adapts the angle of PV modules to face the sun, so that the irradiation angle and the light intensity remain constant and a maximum of electrical energy can be generated. This not only helps to exploit every minute of sunshine but also to make the best use of diffuse light all year round. The aim of this research is to design a robust tracking control system that will point the PV modules to the brightest point in the sky. This objective is achieved by the design of a specialized robust controller and application of the D-partitioning analysis method.

https://ejece.org/index.php/ejece/article/download/21/18

Analysis and Design of a Photovoltaic Tracker System

Purpose




Integrating laboratory work into interactive engineering eLearning contents augments theory with practice while simultaneously ameliorating the apparent theory-practice gap in traditional eLearning. The purpose of this paper is to assess and recommend media that currently fulfil this desirable dual pedagogical goal.




Design/methodology/approach




The qualitative approach compares the eLearner-content interactivity deriving from Mathematica’s Computable Document File (CDF) application, Pearson’s myLab and Lucas-Nuelle’s UniTrain-I. Illustrative interactive examples written in JavaScript and Java are thereby drawn from an engineering eLearning course developed at the University of Botswana (UB).




Findings




Based on its scientific rigour, wide application scope, engineering analytical depth, minimal programming requirements and cross-subject-cum-faculty application and deployment potential, the authors found the CDF to be a versatile environment for generating dynamically interactive eLearning contents. The UniTrain-I, blending a multimedia information and communication technology (ICT)-based interactive eLearner-content philosophy with practical laboratory experimentation, is recommended for meeting the paper’s dual eLearning goal as the most adept framework to-date, blending dynamic interactive eLearning content with laboratory hands-on engineering experimentation.




Research limitations/implications




The lack of other competing frameworks limited the considerations to only the three mentioned above. Consequently, the results are subject to review as the ongoing research advances new insights.




Originality/value




The conclusions help eLearning designers plan ICT-based resources for integration into practical electrical engineering eLearning pedagogy and both CDF and UniTrain-I help dispel the prevailing apparent disquiet regarding the effectiveness of the eLearning-mediated electrical engineering pedagogy. In addition, the cited examples document an original electrical engineering eLearning course developed at the UB.

eLearning hands-on: blending interactive eLearning with practical engineering laboratory

This paper contributes for the further advancement of the analysis and design of robust nonlinear control systems. A nonlinear on-off element with hysteresis is considered as a nonlinear section of the plant discussed in this research. An innovative robust controller design is accomplished by a number of successive steps. Based on the difference equations of its stages, the robust controller is realized by two microcontrollers. Taking into account the Euler's approximation, the method of the D-partitioning and the describing-function stability analysis, as well as robust assessment are applied before and after the robust compensation. The research is a further development of the author’s work on the analysis and design of linear and digital robust control systems. The suggested innovative tool for analysis and design of nonlinear robust control systems by applying a digital robust controller is vital and useful for the further advancement of control theory in this field

Kamen M. Yanev

Papers

Modeling of technology adoption in Botswana

Strategy for analysis and design of a digital robust controller for nonlinear control systems

Analysis and Design of a Photovoltaic Tracker System

eLearning hands-on: blending interactive eLearning with practical engineering laboratory

Advanced Interactive Tools for Analysis and Design of Nonlinear Robust Control Systems