| 1. |
- Bhadani, Kanishk, 1991, et al.
(författare)
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Application of Structural Optimization for an Early Stage Product Development
- 2017
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Ingår i: NAFEMS World Congress 2017, A World of Engineering Simulation, Stockholm, Sweden. - 9781910643372 ; , s. 13-
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Konferensbidrag (refereegranskat)abstract
- In today’s automotive industry there is a growing demand for more fuel efficient vehicles and reduced development times. These trends are driven by stricter environmental regulations, a growing environmental awareness, and increasing technological development and competitiveness. Finding an optimized and balanced component that fulfils the requirements in an early phase of the product development is a prerequisite for enabling more competitive lead times, costs, weights and minimizing the risk for late design changes. The aim with this paper is to show a process capturing CAE driven development for an early stage development of components in a complex system. The process utilizes structural optimization techniques to generate knowledge, optimize and balance packaging volumes of adjacent components in complex systems. The paper also highlight the organizational challenges and technical challenges involving the use of structural optimization for realizing the process completely. The paper will illustrate the simultaneous use of topology and shape optimization to generate knowledge for the optimized design volume for multiple adjacent components linked together. The linking of the multiple component is carried out using morphing technique and the design space between the multiple components is dynamic in nature during simulation. The mesh in one component is allowed to change according to the mesh of the other component during the simulation. The result from the simultaneous topology and shape optimization simulation generates the knowledge if it is feasible to change design volume to meet the weight and performance targets. The process also indicates how much performance increase is possible if the design volume is allowed to change and thus generating a trade-off between the components performance.The new process has a potential to be extended to other conflicting scenarios in adjacent components which exists in early stages of development process especially, cases involving conflicting structural requirements in various industries.
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| 2. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
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Application of Design of Experiments (DoE) in Evaluating Crusher Circuit Performance
- 2023
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The configuration and the interaction between the crushers and screens enable aggregate producers to produce products that are in accordance with the applicable product certification. However, the performance of the system is seldom optimized for the given conditions and market demand. This paper aims to describe the experimental work and the results of quantifying the crusher and screen performance by applying design of experiments in a full-scale tertiary crushing process of an aggregate production plant with both standard belt-cut sampling as well with continuous processes monitoring. The research output is able to demonstrate that there exists an interaction effect between the crusher closed side setting and eccentric speed that previously has not been identified with traditional methods. The quantification of interaction between crusher and screen individual performance to the process performance have been demonstrated with both belt-cut samples and continuous process monitoring.
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| 3. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
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Continuous Assignment Development on Topology Optimization in Engineering Design
- 2022
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- An engineering course assignment needs to be designed as a stimulating and challenging task for actively engaging students. It is typically required to be solved in an iterative approach using lectures, reading materials, software tools and supervision sessions. Assignments allow for a practical application of a theory to enhance the students’ understanding of the topic with active learning activities to gain continuous engagement in the course. In the Engineering Design and Optimization course at the Chalmers University of Technology, there is a good balance of theoretical lectures and practical aspects in the assignments. One of these assignments is called the cantilever beam challenge. The students are given an iterative task of designing a cantilever beam based on their previous engineering know-how in the first iteration and applying Topology Optimization on a defined design space to minimise compliance and mass in the second set of iterations. This paper aims to examine the students’ performance, from the start of the course, concerning the development that has happened regarding the different software solutions and different additive manufacturing techniques, and to provide the students’ opinions on the assignment. Each year, this particular assignment ranks high in the course evaluation due to its framework, competitiveness and instant feedback on the proposed design solutions with computer analysis and physical experiments with 3D printed models. However, the interesting questions are whether more advanced tools and algorithms support students learning and whether the beams’ performance improves.
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| 4. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
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Development of production and environmental platforms for the European aggregates and minerals industries
- 2024
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Ingår i: Minerals Engineering. - 0892-6875. ; 206:2024
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Tidskriftsartikel (refereegranskat)abstract
- Both quantification and communication of environmental impacts can create the foundation for improved sustainable production and decision-making. Without widespread information about site-specific environmental impacts, stakeholders cannot make a well-informed decision based on the local system boundaries. With organization-wide digital platforms, different aspects of production and management can be integrated and customized based on the organization's needs. This paper aims to give an overview of the development of three different process and environmental platforms, their purposes, system structure, system constraints and the applied framework. These respective platforms are being developed separately for the Swedish aggregates industry, the European aggregates industry and the European critical raw materials sector. The initial demonstrator can integrate site-specific information with a simulation-based allocation of resources and generate Life-Cycle Assessment and Environmental Product Declaration reports harmonized with the EN 15804 standard and the associated Product Category Rules.
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| 5. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
-
Development of Production and Environmental Platforms for the European Aggregates and Minerals Industries
- 2023
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Both quantification and communication of environmental impacts can create the foundation for improved sustainable production and decision-making. Without widespread information about site-specific environmental impacts, stakeholders cannot make a well-informed decision based on the local system boundaries. With organization-wide digital platforms, different aspects of production and management can be integrated and customized based on the organization's needs. This paper aims to give an overview of the development of three different process and environmental platforms, their purposes, system structure, system constraints and the applied framework. These respective platforms are being developed separately for the Swedish aggregates industry, the European aggregates industry and the European critical raw materials sector. The initial demonstrator can integrate site-specific information with a simulation-based allocation of resources and generate Life-Cycle Assessment and Environmental Product Declaration reports harmonized with the EN 15804 standard and the associated Product Category Rules.
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| 6. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
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Improving Students Engagement with Active Learning in Engineering Optimization Lectures
- 2021
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Ingår i: Proceedings of the International CDIO Conference. - 2002-1593. - 9786164076167 ; 1:1, s. 535-545
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Konferensbidrag (refereegranskat)abstract
- In optimisation, as for learning, the synthesises of previous knowledge and current information is essential to achieve defined objectives. The students' objectives are to fulfil the course's intended learning outcomes and possibly, at the same time, develop their knowledge, skills, and attitudes within the subject. The purpose of this work is to incorporate a more collaborative learning environment with active learning activities in the classroom to improve student learning opportunities, their perception of the course and their interest in the subject of optimisation. Within the CDIO initiative, active learning or experiential learning is stated as a key factor in engaging students directly in thinking and problem-solving activities. This can apply to different teaching activities such as assignments, lectures, and assessments. With active learning, the purpose is to involve students more actively in the learning process instead of relying on passive information transfer. Active learning methods aim to facilitate the students' process of creating their understanding of the topic by reflecting, questioning, conjecturing, evaluating and make connections between ideas whilst drawing on ideas, experiences and knowledge of others. In this work, diverse activities for incorporating more interactive learning in the classroom have been implemented in different course lectures, activities such as think pair-share, mind maps, multiple-choice questions, incomplete hands and more. An evaluation of the students' perception of the course and the various activities was carried out at the end of the course. The most considerable improvement was with the overall impression of teaching. That improved between the years from 3.10 to 3.57. The most appreciated activity was the think-pair-share approach, which gave the students a cognitive break from the lecture slides to discuss the topic. However, the response rate was limited but did indicate the students' perspective and what was appreciated. The results will provide a good base for future development.
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| 7. |
- Bhadani, Kanishk, 1991, et al.
(författare)
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Application of design of experiments (DoE) in evaluating crushing-screening performance for aggregates production
- 2024
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Ingår i: Minerals Engineering. - 0892-6875. ; 209
-
Tidskriftsartikel (refereegranskat)abstract
- The configuration and the interaction between the crushers and screens enable aggregate producers to produce products that are in accordance with the applicable product certification. However, the performance of the system is seldom optimized for the given conditions and market demand. This paper aims to describe the experimental work and the results of quantifying the crusher and screen performance by applying the design of experiments (DoE) in a full-scale tertiary crushing process of an aggregate production plant with both standard belt-cut sampling as well with continuous processes monitoring. The results show the application of a simplified modelling approach using the design of experiments for the evaluation of crusher performance and circuit performance using experimental data. The research output is able to demonstrate that there exists an interaction effect between the crusher closed side setting and eccentric speed that previously has not been identified with traditional methods. The quantification of interaction between crusher and screen individual performance to the process performance has been demonstrated with both belt-cut samples and continuous process monitoring. Using a DoE, digital experiments can be planned for mapping and quantifying the performance of aggregate production.
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| 8. |
- Bhadani, Kanishk, 1991, et al.
(författare)
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Application of Multi-Disciplinary Optimization Architectures in Mineral Processing Simulations
- 2018
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Ingår i: 11th International Comminution Symposium. - 9781510883789
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Konferensbidrag (refereegranskat)abstract
- Optimization is a pivotal point in distinguishing the competitiveness between industries that are developing, designing and operating products and processes. Mineral processing is an industry which operates various sub-processes and produces one or several products. The sub-processes involved are dynamic in nature and differs in discipline of operation. These dynamic sub-processes are sequentially integrated forming a mineral processing system. Currently, the developed simulations for the mineral processing systems have the potential to be used to design, operate and control mineral processing plants to an increased extent, but need broader optimization strategies to integrate multiple sub-processes involved. The scope of this research is to demonstrate application of multi-disciplinary optimization (MDO) architectures into a mineral processing simulation. A case study consisting of two sub-processes of comminution and classification circuits to produce aggregate products is used to demonstrate the application of MDO architectures. The MDO architectures are compared based on problem formulation, computational resources required and validity of the results. The optimization results using MDO architectures can be used to illustrate trade-offs between different sub-processes within the considered scope. The application of MDO architectures can facilitate the linking mathematical models of various disciplines such as comminution, and liberation in mineral processing simulation.
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| 9. |
- Bhadani, Kanishk, 1991, et al.
(författare)
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Application of multi-disciplinary optimization architectures in mineral processing simulations
- 2018
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Ingår i: Minerals Engineering. - : Elsevier BV. - 0892-6875. ; 128, s. 27-35
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Tidskriftsartikel (refereegranskat)abstract
- Optimization is a pivotal point in distinguishing the competitiveness of industries that are developing, designing and operating various products and processes. Mineral processing is an industry which operates various sub-processes and produces one or several products. The sub-processes involved are dynamic in nature and differ in the discipline of operation. These dynamic sub-processes are sequentially integrated forming a mineral processing system. Currently, the developed simulations for the mineral processing systems have the potential to be used to design, operate and control mineral processing plants to an increased extent, but need broader optimization strategies to integrate multiple sub-processes involved. The scope of this research is to demonstrate application of multi-disciplinary optimization (MDO) architectures into a mineral processing simulation. A simulation study consisting of two sub-processes of comminution and classification circuits to produce aggregate products is used to demonstrate the application of MDO architectures. The MDO architectures are compared based on problem formulation, computational resources required and validity of the results. The optimization results using MDO architectures can be used to illustrate trade-offs between different sub-processes within the considered scope. The application of MDO architectures can facilitate the linking mathematical models of various disciplines such as comminution, and liberation in mineral processing simulation.
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| 10. |
- Bhadani, Kanishk, 1991, et al.
(författare)
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Application of Optimization Method for Calibration and Maintenance of Power-Based Belt Scale
- 2021
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Ingår i: Minerals. - : MDPI AG. - 2075-163X. ; 11:4
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Tidskriftsartikel (refereegranskat)abstract
- Process optimization and improvement strategies applied in a crushing plant are coupled with the measurement of such improvements, and one of the indicators for improvements is the mass flow at different parts of the circuit. The estimation of the mass flow using conveyor belt power consumption allows for a cost-effective solution. The principle behind the estimation is that the power draw from a conveyor belt is dependent on the load on the conveyor, conveyor speed, geometrical design, and overall efficiency of the conveyor. Calibration of the power-based belt scale is carried out periodically to ensure the accuracy of the measurement. In practical implementation, certain conveyors are not directly accessible for calibration to the physical measurement as these conveyors have limited access or it is too costly to interrupt the ongoing production process. For addressing this limitation, a better strategy is needed to calibrate the efficiency of the power-based belt scale and maintain the reliability of such a system. This paper presents the application of an optimization method for a data collection system to calibrate and maintain accurate mass flow estimation. This includes calibration of variables such as the efficiency of the power-based belt scale. The optimization method uses an error minimization optimization formulation together with the mass balancing of the crushing plant to determine the efficiency of accessible and non-accessible conveyors. Furthermore, a correlation matrix is developed to monitor and detect deviations in the estimation for the mass flow. The methods are applied and discussed for operational data from a full-scale crushing plant.
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