Digital Twins (DTs), an emerging concept from Industry 4.0, are virtual representations of real technical assets. Multi-domain 3D simulation systems can bring DTs to life, even before their physical counterparts are f...
详细信息
ISBN:
(纸本)9781538695821
Digital Twins (DTs), an emerging concept from Industry 4.0, are virtual representations of real technical assets. Multi-domain 3D simulation systems can bring DTs to life, even before their physical counterparts are finished. A DT's internal state can be fed from its real twin or generated by simulation. Access to this high-dimensional state of a DT is the key for various analysis and visualization methods presented in this paper. We introduce a generic formalism of state space for DTs and utilize it in an application scenario for automated driving. throughout this example, methods for state logging and replays, data analysis, and visualization within 3D simulation frameworks are presented. Clear definitions for state variables, vectors, trajectories, and time series help slicing the DTs' state spaces of enormous dimensionality. the presented methodology does not only support the development of intelligent algorithms for autonomous driving, but is also the basis for further use cases of DTs involving optimization, mental models, and decision support systems.
the paper presents a combined prior knowledge - black-box approach to modeling of the dynamic systems. Proposed methodology assumes two basic steps: first an optimization of a physical model, using Particle Swarm Opti...
详细信息
ISBN:
(纸本)9781457709142
the paper presents a combined prior knowledge - black-box approach to modeling of the dynamic systems. Proposed methodology assumes two basic steps: first an optimization of a physical model, using Particle Swarm Optimization algorithm is performed. Next, a black-box model is estimated so as to reduce the remaining error of the physical model. Proposed methodology was presented on the example of improving the accuracy of a pneumatic actuator physical model.
An adaptive fuzzy logic control scheme is developed for tracking a square trajectory by the endpoint of a two-link rigid joint space robot. the control strategy is based on a direct adaptive control scheme in which th...
详细信息
ISBN:
(纸本)9781457709142
An adaptive fuzzy logic control scheme is developed for tracking a square trajectory by the endpoint of a two-link rigid joint space robot. the control strategy is based on a direct adaptive control scheme in which the controller gains are adapted in real-time according to fuzzy logic systems such that the tracking errors between a reference model and the actual robot system outputs are brought to zero.
this paper presents a complete Virtual Reality (VR) system used for upper extremity rehabilitation. the system consists of sensors, the computer application and stereoscopic display glasses. the system is designed to ...
详细信息
ISBN:
(纸本)9781467321242
this paper presents a complete Virtual Reality (VR) system used for upper extremity rehabilitation. the system consists of sensors, the computer application and stereoscopic display glasses. the system is designed to cooperate with special mechanical orthosis used for arm rehabilitation. Patients can see their movements in the 3D virtual space during exercises. the system has a key role in development of rehabilitation robot, because numerous researches show that exercises in VR decreases the time of rehabilitation.
In this paper three methods of electric motor angular speed calculation are compared. the source of the measurement signal is a 14-bit absolute encoder. the authors compared the well-known classic methods M with more ...
详细信息
ISBN:
(纸本)9781479950812
In this paper three methods of electric motor angular speed calculation are compared. the source of the measurement signal is a 14-bit absolute encoder. the authors compared the well-known classic methods M with more advanced approaches. First of the complex methods is based on utilization of phase loop lock system in an estimation process using on-line system model. the third method discussed in the paper is focused on application of Chebyshev filter. Short description of all of the mentioned method is followed by simulation and experimental results. the results are presented on an instance of permanent magnet synchronous motor drive, with both speed controller and speed calculation algorithms implemented in a digital signal processor system.
Infrastructure provisioning in the Cloud can be time-consuming and error-prone due to the manual process of building scripts. Configuration Management Tools (CMT) such as Ansible, Puppet or Chef use scripts to orchest...
详细信息
Robotic exoskeleton arms have been around for a long time and they have successfully evolved from research prototypes to commercial products. Multipurpose supernumerary robotic limbs (MSRLs) have been recently introdu...
详细信息
ISBN:
(纸本)9781479987016
Robotic exoskeleton arms have been around for a long time and they have successfully evolved from research prototypes to commercial products. Multipurpose supernumerary robotic limbs (MSRLs) have been recently introduced as new types of aids which do not directly replace missing limbs, but they are additional mechanical arms with changeable end-effectors which can be worn by the user to provide needed functionalities. this paper presents the mechanical design and kinematics modelling and control of a MSRL system. the MSRL presented could have good application in industrial and domestic situations.
this article presents a range of approximation error measures for reduced mathematical MIMO models of controlled objects. these measures can be of use in evaluations of reduction quality. the impact of selection of a ...
详细信息
ISBN:
(纸本)9781479987016
this article presents a range of approximation error measures for reduced mathematical MIMO models of controlled objects. these measures can be of use in evaluations of reduction quality. the impact of selection of a particular approximation error measure as the objective function of the reduction parameter optimization algorithm on the frequency characteristics of the reduced model was analyzed. Particular emphasis was given to those cases where the individual channels of a MIMO model differ significantly from one another. the results are presented on the example of a one-phase zone evaporating tubes model of a BP-1150 steam boiler.
A physically based, nonlinear model of the masses of air and burned gas inside the cylinders of a spark ignition (SI) engine is presented. Goal of this work is to develop a feed forward control law, which perfectly tr...
详细信息
ISBN:
(纸本)9781457709142
A physically based, nonlinear model of the masses of air and burned gas inside the cylinders of a spark ignition (SI) engine is presented. Goal of this work is to develop a feed forward control law, which perfectly tracks given reference values of these masses. this is done by utilizing the exact linearization approach [1]. the final feed forward control law is verified in combination with a slightly modified design model as well as the original model.
the paper presents selected methods for improving the accuracy of classification of headlights and taillights of the vehicles. the methods include analyzing blob properties and locations of the detections. A new featu...
详细信息
ISBN:
(纸本)9781728109336
the paper presents selected methods for improving the accuracy of classification of headlights and taillights of the vehicles. the methods include analyzing blob properties and locations of the detections. A new feature for describing binary blob shape has been proposed. Moreover, data augmentation technique has been used to improve the results of the classification. the referenced system is based on convolutional neural networks (CNNs). New solutions have been tested with comprehensive set of video sequences (of total duration exceeding ten hours) under various weather conditions and from different road types.
暂无评论