this study investigates the iterative learning control of a sequencing batch reactor for the production of polyhydroxybutyrate (PHB). In order to overcome the effect of model plant mismatches and unknown disturbances,...
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ISBN:
(纸本)9781479987016
this study investigates the iterative learning control of a sequencing batch reactor for the production of polyhydroxybutyrate (PHB). In order to overcome the effect of model plant mismatches and unknown disturbances, a batch to batch iterative learning control strategy with incrementally updated models is developed. the reference batch is taken as the immediate previous batch in order to cope with nonlinearities and process variations. After each batch, the newly obtained process operation data is added to the historical process data base and an updated linearised model is re-identified. To cope with colinearity in the modeling data, principal component regression and partial least squares regression are used in identifying batch-wise linearised models. the proposed technique has been successfully applied to a sequencing batch reactor for the production of PHB.
In this paper, we present an improved frequency weighted balanced related techniques which is based on a combination of the unweighted balanced techniqe withthe Lin and Chin's frequency weighted balanced Techniqu...
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ISBN:
(纸本)9781424422869
In this paper, we present an improved frequency weighted balanced related techniques which is based on a combination of the unweighted balanced techniqe withthe Lin and Chin's frequency weighted balanced Technique. the reduced order models which are guaranteed to be stable in case of double-sided weighting, are obtained by direct truncation. A simple, elegant and easily calculatable a priori error bounds are also derived. A numerical example and comparison with other well-known techniques show the effectiveness of the proposed technique.
this paper investigates the application of Few Shot Segmentation techniques in addressing weed management challenges within agricultural robotics. Traditional methods, such as indiscriminate herbicide spraying, pose e...
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ISBN:
(纸本)9798350358513;9798350358520
this paper investigates the application of Few Shot Segmentation techniques in addressing weed management challenges within agricultural robotics. Traditional methods, such as indiscriminate herbicide spraying, pose environmental and economic concerns, emphasize the necessity of developing automated precision procedures. Semantic Segmentation models can offer significant advancements in weed management within agricultural robotics but can be negatively impacted by domain shifts, often requiring adaptation, hindering the development of the field. In this context, we propose a Few Shot Segmentation-based approach for precise weed segmentation in corn and bean cultivations. Our model, adapted from PFENet, exhibits robust performance across varying environmental conditions, mitigating domain shift issues. Evaluation on the ROSE dataset demonstrates the model's reliability and generalizability, highlighting the potential of Few Shot Segmentation in advancing agricultural robotics technologies.
the pilot's error is one of the important factors affecting flight safety, which may cause serious consequences. this article mainly discusses the continuous operating deviation and sudden large-scale misoperation...
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ISBN:
(纸本)9781728177090
the pilot's error is one of the important factors affecting flight safety, which may cause serious consequences. this article mainly discusses the continuous operating deviation and sudden large-scale misoperation during the flight process. For the two types of error models, the controllers are designed to reduce the impact after the misoperation occurs, and simulation verification is performed. Simulation results show that the L1 adaptive controller can effectively suppress the impact of continuous operating deviation on control performance and improve flight comfort;the incremental nonlinear dynamic inverse controller can effectively reduce the impact of large misoperation and restore the original flight state.
In this paper a comparative analysis is represented on various navigation guidance methods used for intercepting fast maneuvering moving objects. A glancing revision is introduced on relevant works within the introduc...
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ISBN:
(纸本)9781424478279
In this paper a comparative analysis is represented on various navigation guidance methods used for intercepting fast maneuvering moving objects. A glancing revision is introduced on relevant works within the introduction section. Four common methods for navigation under investigation. Results demonstrate their infirmity on smoothly intercepting a moving object. Hence, to improve the navigation guidance methods and to adapt them with robotic problems a modified version of AIPNG is proposed for 2D problems and is developed for 3D problems utilization.
Most nonlinear modelling approaches focus on solving a model selection problem with complete data, and in many cases original data are pre-processed with some nonlinear transforms such as Box-Tidwell and fractional po...
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ISBN:
(纸本)9781479987016
Most nonlinear modelling approaches focus on solving a model selection problem with complete data, and in many cases original data are pre-processed with some nonlinear transforms such as Box-Tidwell and fractional polynomial transformation. Often these approaches can lead to modelsthat are better than traditional models (for example, logistic model and quadratic model). However, in the case of missing data, it is not easy to predict the relationship between the predictor and dependent variables;traditional nonlinear models in some cases of missing data analysis give poor results. this paper explains nonlinear model selection techniques for missing data. It includes an overview of nonlinear model selection with complete data, and provides accessible descriptions of Box-Tidwell and fractional polynomial methods for model selection. In particular, this paper focuses on a fractional polynomial method for nonlinear modelling in cases of missing data and presents analysis examples to illustrate performance of the method.
In standardized sectors such as the automotive, the cost-benefit ratio of automation solutions is high as they contribute to increase capacity, decrease costs and improve product quality. In less standardized applicat...
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ISBN:
(纸本)9781728109336
In standardized sectors such as the automotive, the cost-benefit ratio of automation solutions is high as they contribute to increase capacity, decrease costs and improve product quality. In less standardized application fields, the contribution of automation to improvements in capacity, cost and quality blurs. the automation of complex and unstructured tasks requires sophisticated, expensive and low-performing systems, whose impact on product quality is oftentimes not directly perceived by customers. As a result, the full automation of process chains in the general manufacturing or the logistic sectors is often a sub-optimal solution. Taking the distance from the false idea that a process should be either fully automated, or fully manual, this paper presents a novel heuristic method for design of lean human-robot interaction, the Quality Interaction Function Deployment, withthe objective of the "right level of automation". Functions are divided among human and automated agents and several automation scenarios are created and evaluated with respect to their compliance to the requirements of all process' stakeholders. As a result, synergies among operators (manual tasks) and machines (automated tasks) are improved, thus reducing time losses and increasing productivity.
the problem of distributing gas through a network of pipelines is formulated as an linearized nonstationary differential repetitive model subject to some flow-pressure constraints of material balances and pressure bou...
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ISBN:
(纸本)9781467321242
the problem of distributing gas through a network of pipelines is formulated as an linearized nonstationary differential repetitive model subject to some flow-pressure constraints of material balances and pressure bounds. the linear model is constructed in the neighborhood of the known basic operating regime of gas delivery. the considered problem is to minimize the total supply cost of a gas transmission company withthe minimal guaranteed pressure at the nodes. Some aspects of a comprehensive optimization theory based on a 'constructive approach' are discussed.
In the paper an approach to discrete-time frequency response identification of a plant operating under feedback in the case of periodic disturbances is presented. In the presented approach to discrete-time frequency r...
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ISBN:
(纸本)9781479950812
In the paper an approach to discrete-time frequency response identification of a plant operating under feedback in the case of periodic disturbances is presented. In the presented approach to discrete-time frequency response identification integrated bispectra and higher-order non-gaussian multisine excitations are applied. A focus on almost sure convergence of the identified discrete-time frequency response to true plant is given. the presented discussion is illustrated by examples showing effectiveness of the proposed approach.
this paper touches upon the issue of dexterous control of rehabilitation robots. there have been proposed a high-level control system and algorithms used for training patients. Emphasis was made especially on the grav...
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ISBN:
(纸本)9781457709142
this paper touches upon the issue of dexterous control of rehabilitation robots. there have been proposed a high-level control system and algorithms used for training patients. Emphasis was made especially on the gravitation compensation algorithm, because of the low velocity and acceleration of movement parameters during rehabilitation. the direction of movements was estimated based on the model of surface electromyographic (sEMG) signal, which renders muscle activity very well. the model of manipulator is stable, behaves in a predictable way and, according to the EMG interpretation block, satisfyingly deduces the intention of motion and controls the model.
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