| 1. |
- Bagchi, Satyajit, et al.
(author)
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Application of ZUPT-Aided INS to Indoor Localization of Tightening Tools
- 2018
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In: Procedia Manufacturing. - : Elsevier B.V.. - 2351-9789. ; , s. 565-569
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Conference paper (peer-reviewed)abstract
- This paper presents the application of zero velocity detectors in the field of indoor positioning for industrial tightening tools particularly in tandem with an extended Kalman filter to achieve reliable estimates in position. Inertial measurement units are promising devices to use in positioning systems. Data has been collected from IMU while moving in a predefined trajectory on a tightening test rig and post-processed in MATLAB using the implemented algorithms and the results are presented. They indicate that the error accumulation can be effectively controlled to 25 cm/min for the commercial grade IMU and 15 cm/min for the navigation grade IMU.
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| 2. |
- Carlqvist, Per, et al.
(author)
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Benchmark of High Level Programming : Pilot Case Vibration Control
- 2009
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In: Proceedings of the 9th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2009. - 9780955308260 ; , s. 361-364
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Conference paper (peer-reviewed)abstract
- The advancement of technology of laser pattern generators needs to meet demands of the rapid product development pace in the display and semiconductor markets. A hypothesis is that efficiency in the development process of complex systems can be improved by introducing a higher level programming approach. This will make a model and simulation based development (MBD) strategy more easy to adapt leading to 1) higher technical performance at shorter development time from idea to product introduction phase, 2) lower cost of goods, 3) shorter production-, installations- & upgrade time and 4) possibility of very efficient field support & service, etc. The success of an MBD approach is dependent on the simulation software capability to express the behavior of a real system. Consequently, as a first step towards an MBD approach, the investigation covers a pilot-study where results from simulations are compared to an existing controlled system.
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| 3. |
- Feng, Lei, et al.
(author)
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Fuel Minimization of the Electric Engine CoolingSystem with Active Grille Shutter by IterativeQuadratic Programming
- 2020
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In: IEEE Transactions on Vehicular Technology. - : IEEE. - 0018-9545 .- 1939-9359. ; 69:3, s. 2621-2635
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Journal article (peer-reviewed)abstract
- The electric engine cooling system with the active grille shutter requires intelligent and predictive control to reach its full benefits on fuel economy and thermal management. Conventional control methods regulate the coolant temperature to a fixed value but do not directly minimize the vehicle's fuel/energy consumption. By contrast, we design a fuel minimization controller through solving constraint nonlinear optimization problems, whose cost function is the total fuel consumption and constraints are the vehicle's physical limits. To achieve high computational efficiency and sufficient accuracy, the optimization problem is solved by iterative convex quadratic programming and quasilinearization. The advantages of the proposed control method on both fuel economy and engine thermal management are demonstrated by simulations.
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| 4. |
- Frede, Daniel, et al.
(author)
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Polynomial control integrated to mechatronic concept optimization
- 2014
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In: Proceedings of the 14th Mechatronics Forum International Conference (Mechatronics 2014).
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Conference paper (peer-reviewed)abstract
- Mechatronic systems design is a challenge. In order to best use the synergetic effects of such systems, they need to be designed in an integrated manner. Therefore, holistic mechatronic systems design requires considering both multiple domains and multiple optimization targets concurrently. Previous research by the authors presents a novel approach to mechatronic systems design by enabling swift optimization and subsequent evaluation of mechatronic design concepts. The optimization method builds upon algebraic models relating component performance to e.g. size and weight, and linear transfer function models which are used to capture dynamic properties. The swiftness of the method comes from the fact that the holistic optimization is performed without simulation. This paper extends the design methodology by integrating polynomial control design into the holistic optimization procedure as a front-loaded activity, as to reduce time and cost consuming design iterations in later design phases. In order to consider constraints regarding a quick optimization and evaluation, the control design is carried out in the frequency domain. The control performance, i.e. how well a particular mechatronic concept handles the exogenous signals (command, disturbance, noise) is considered as specification rather than optimization criterion. The novelty is found in the application of a polynomial control approach in context of holistic design optimization and evaluation.
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| 5. |
- Gu, Yunjin, et al.
(author)
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Toward a New Force Sensor for Twisted String Actuator : A Study about the Force on Separator
- 2017
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In: 2017 IEEE/RSJ INTERNATIONAL CONFERENCE ON INTELLIGENT ROBOTS AND SYSTEMS (IROS). - : IEEE. - 9781538626825 ; , s. 1207-1212
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Conference paper (peer-reviewed)abstract
- The twisted string actuator (TSA) shows promise as a good substitution for biological muscle in robotics. In this paper, a new force sensing mechanism is suggested utilizing the separator which exists in some kind of TSAs. We have identified a relation between the force acting on the separator and the load on the actuator and propose a mathematical model based on this original phenomenon. We also propose an estimation method of the load acting on the TSA using the mathematical model. This relationship has been verified in experiment. A contribution of this research is that the actuation load can be estimated by use of internal structure in TSA which in some circumstances can result in a simpler system compared to direct measurement of load in line.
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| 6. |
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| 7. |
- Hasan, Baha, 1977-
(author)
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An Ontological Approach to support Knowledge Sharing between Product Design and Assembly Process Planning (APP)
- 2017
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Doctoral thesis (other academic/artistic)abstract
- Modern manufacturing organizations have to cope with several critical issues arising from the need for mass customization such as short product life-cycles, an increasing number of product variants and frequently changing customer requirements. One of the main factors that could aid overcoming those challenges is the use of information and communication technology (ICT) applications over a collaborative manufacturing environment, in which all stakeholders share and exchange knowledge across different manufacturing domains and applications. However, the use of ICT applications over a collaborative manufacturing environment is limited at the domain level by semantic conflicts arising from the use of different ways to describe the same objects and facts arising from different conceptualizations. Similarly, ICT usage is limited on the application level by interoperability problems arising from diverse heterogeneity between different ICT applications and tools.This research presents a semantic approach to support knowledge sharing within the assembly domain. More specifically, this research is focusing on capturing and sharing assembly design knowledge and integrating the assembly design domain and the Assembly Process Planning (APP) domain. Assembly design and APP are very important engineering domains for successful manufacturing system design, which requires an efficient collaborative environment for best utilization of the assembly resources. However, though these domains represent different perspectives in understanding of the same concepts, both domains use different software applications, which might cause interoperability issues.In this thesis, a novel integration approach has been proposed; this approach is composed of two stages: the first stage includes modelling and recognition of assembly knowledge semantics from SolidWorks (SW) CAD software by using SolidWorks’ Application Programmable Interface (SW-API). The second stage includes sharing the recognized assembly knowledge semantics by using a knowledge-based system in the form of a three-layer ontology architecture which provides a common semantic base to support knowledge sharing across assembly design and APP both on the domain and the application level. Each ontology layer shares a set of concepts from the most generic level to the most specialized level. The foundation ontology layer represents the general key concepts in the assembly design and APP domains. More specialized assembly design concepts and APP concepts are represented both in the domain ontology layer, and the application ontology layer. In the latter, concepts related to SolidWorks CAD software and to assembly robotic devices are represented.
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| 8. |
- Hasan, Baha, 1977-, et al.
(author)
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Features Extraction from CAD as a Basis for Assembly Process Planning
- 2017
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In: TECHNOLOGICAL INNOVATION FOR SMART SYSTEMS. - Cham : SPRINGER-VERLAG BERLIN. - 9783319560762 ; , s. 144-153
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Conference paper (peer-reviewed)abstract
- This paper describes a novel approach to recognize product features, which are significant for Assembly Process Planning (APP). The work presented in this paper is a part of a larger effort to develop methods and tools for a more automated and bidirectional link between product CAD and the different processes and resources applied in APP. APP is the phase, in which the required assembly processes and resources are determined in order to convert a product to fully assembled or semi-assembled product. Product features will be extracted from the SolidWorks (SW) CAD file using SW- Application Programming Interface (API). SW-API is an interface that allows the exchange of data between CAD design and different software applications. The work includes automatic recognition for assembly knowledge, geometry and non-geometry knowledge (dimensions, geometrical tolerances, and kinematic constraints) in assembly design, which are relevant for assembly process and resources. Recognition algorithms have been developed by using visual basic. Net (VB.net). A case-study example is included for illustration of the proposed approach.
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| 9. |
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| 10. |
- Liu, Tong, PhD Candidate, et al.
(author)
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A Binary Controller to Ensure Engine Peak Efficiency for a Parallel Hybrid Electric Car
- 2019
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In: Proceedings 2019 IEEE Intelligent Transportation Systems Conference. - : IEEE. - 9781538670248 ; , s. 726-732
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Conference paper (peer-reviewed)abstract
- The fuel efficiency of the hybrid electric vehicle (HEV) highly relies on the engine efficiency. Thispaper proposes a particular powertrain configuration on a small hybrid electric racing car wherethe engine is only allowed to operate withpeak efficiency. An onlinebinarycontroller, accordingly, is developedbased on dynamic programming (DP)to control the engine on/off status and the torques from the electric motors (EMs) to ensure the HEV can successfully complete the drive mission with minimal fuel consumption.For comparison, the paper also develops anoptimal powertrain controller of the same HEV with the normal usage ofthe engine, i.e., the engine operates at any feasible point of the 2Dfuel efficiency map. The simulation results show that this binary controller can improveroughly13% on fuel efficiency compared with the general engine case.
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