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Academic literature on the topic 'Fox control'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Fox control"

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Kinnear, J. E., M. L. Onus, and Neil R. Sumner. "Fox control and rock-wallaby population dynamics — II. An update." Wildlife Research 25, no. 1 (1998): 81. http://dx.doi.org/10.1071/wr96072.

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Five remnant populations of rock-wallabies (Petrogale lateralis) in the Western Australian wheatbelt have been the subjects of an experiment designed to assess the impact of fox predation on the population dynamics of this species. The effect of a fox-control programme, initiated in 1982 at two rock-wallaby sites, was first assessed in 1986 along with three other sites not subject to fox control. It was concluded that fox predation was the principal factor limiting the size and distribution of P. lateralis populations. In 1990 after a further four years of fox control, the experiment was reassessed and a comprehensive statistical analysis of the data set confirmed this conclusion. These results reinforce the need for conservation authorities across Australia to implement fox-control programmes to assure the survival of rock-wallaby populations (and other likewise-threatened species).

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Tang, Zhen Zhi, Sika Zheng, Julia Nikolic, and Douglas L. Black. "Developmental Control of CaV1.2 L-Type Calcium Channel Splicing by Fox Proteins." Molecular and Cellular Biology 29, no. 17 (2009): 4757–65. http://dx.doi.org/10.1128/mcb.00608-09.

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ABSTRACT CaV1.2 voltage-gated calcium channels play critical roles in the control of membrane excitability, gene expression, and muscle contraction. These channels show diverse functional properties generated by alternative splicing at multiple sites within the CaV1.2 pre-mRNA. The molecular mechanisms controlling this splicing are not understood. We find that two exons in the CaV1.2 channel are controlled in part by members of the Fox family of splicing regulators. Exons 9* and 33 confer distinct electrophysiological properties on the channel and show opposite patterns of regulation during cortical development, with exon 9* progressively decreasing its inclusion in the CaV1.2 mRNA over time and exon 33 progressively increasing. Both exons contain Fox protein binding elements within their adjacent introns, and Fox protein expression is induced in cortical neurons in parallel with the changes in CaV1.2 splicing. We show that knocking down expression of Fox proteins in tissue culture cells has opposite effects on exons 9* and 33. The loss of Fox protein increases exon 9* splicing and decreases exon 33, as predicted by the positions of the Fox binding elements and by the pattern of splicing in development. Conversely, overexpression of Fox1 and Fox2 proteins represses exon 9* and enhances exon 33 splicing in the endogenous CaV1.2 mRNA. These effects of Fox proteins on exons 9* and 33 can be recapitulated in transfected minigene reporters. Both the repressive and the enhancing effects of Fox proteins are dependent on the Fox binding elements within and adjacent to the target exons, indicating that the Fox proteins are directly regulating both exons. These results demonstrate that the Fox protein family is playing a key role in tuning the properties of CaV1.2 calcium channels during neuronal development.

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Kinnear, J. E., M. L. Onus, and R. N. Bromilow. "Fox control and rock-wallaby population dynamics." Wildlife Research 15, no. 4 (1988): 435. http://dx.doi.org/10.1071/wr9880435.

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The population dynamics of five remnant rock-wallaby populations (Petrogale lateralis) persisting on granite outcrops in the central wheatbelt region of Western Australia were monitored over a six year period. From 1979 to 1982 all populations remained relatively static or declined for unknown reasons, but circumstantial evidence implicated fox predation. A fox control program was implemented in 1982 on two outcrops and was maintained for four years with the result that the two resident rock-wallaby populations increased by 138 and 223%. Two rock-wallaby populations occupying sites not subjected to fox control declined by 14 and 85%, and the third population increased by 29%. It was concluded that the fox has probably been a significant factor in the demise and decline of native mammals in the past, and that surviving populations are still at risk. Control of predation pressure on nature reserves was shown to be feasible from a management perspective.

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Priddel, David, and Robert Wheeler. "Efficacy of Fox Control in Reducing the Mortality of Released Captive-reared Malleefowl, Leipoa ocellata." Wildlife Research 24, no. 4 (1997): 469. http://dx.doi.org/10.1071/wr96094.

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The effectiveness of localised, high-intensity fox baiting in reducing the incidence of fox predation was examined after captive-reared malleefowl were released and their survival monitored. Malleefowl released into baited areas survived longer than those released into nearby areas that had not been baited. Survival in both baited and non-baited areas was greater than that prior to any fox control. Of those malleefowl released, 29% were still alive three months later, whereas prior to fox control almost all were killed by foxes within a month of release. Despite the improvement in survival of malleefowl, fox predation remained the primary cause of malleefowl mortality. The number of baits taken by foxes indicated a large fox population and a high level of reinfestation. A more widespread, but less intensive, regime of baiting failed to further enhance the survival of malleefowl. Malleefowl were also particularly vulnerable to predation by raptors in habitats where the mallee was interspersed with areas of open woodland, and where the understorey was sparse. Fox baiting will need to be frequent, intensive and widespread to reduce fox density to levels where predation no longer threatens the survival or recovery of malleefowl populations.

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McLeod, Lynette J., Glen R. Saunders, Steven R. McLeod, Michelle Dawson, and Remy van de Ven. "The potential for participatory landscape management to reduce the impact of the red fox (Vulpes vulpes) on lamb production." Wildlife Research 37, no. 8 (2010): 695. http://dx.doi.org/10.1071/wr10082.

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ContextRed fox (Vulpes vulpes) predation has an impact on populations of many species throughout its range worldwide, and as such, the red fox is the target of control programs. AimsWe investigated the potential for participatory landscape management to reduce the impact of fox predation on a major prey species, lambs. MethodsThe present study monitored fox-management programs already operating across 4.5 million hectares of regional New South Wales to compare the impact of varying (frequency and spatial coverage) control effort on lamb survival. Key resultsThe frequency and timing of fox control was correlated with lamb survival. Lamb survival was higher in areas where fox baiting was carried out twice a year, in autumn and late winter/spring. Spatial coverage of the control program was also positively correlated with lamb survival. Properties that had near neighbours (up to 2.5 km away) participating in group fox-control programs had higher survival of lambs than properties that did not. ConclusionsThese results support the development of a high level of group participation in fox-control programs that considers both spatial extent and frequency of baiting programs. They also support a movement away from the reactionary, short-term practice of baiting small areas to protect vulnerable prey. ImplicationsCoordinated group-baiting programs are likely to deliver improved lamb survival and should be promoted in areas where ongoing control programs for foxes are necessary.

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Coates, T. D. "The effect of fox control on mammal populations in an outer urban conservation reserve." Australian Mammalogy 30, no. 2 (2008): 51. http://dx.doi.org/10.1071/am08007.

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European red foxes were systematically removed from a 370 ha conservation reserve on Melbourne?s urban fringe between December 2003 and September 2005. Activity indexes monitored throughout the removal phase indicated that the fox population declined dramatically when poison baits were available and then increased again predictably during winter and summer each subsequent year. Three alternate indices of fox activity were highly synchronous throughout the study suggesting that the bait-removal index used widely in Australia may provide a reliable measure of overall fox activity in small urban reserves. With monitoring and strategic baiting, fox activity was maintained at a fraction of its pre-control level. Activity indices for several other species of mammal also appeared to respond to the reduced density of foxes at the site after 2003. Southern brown bandicoots (Isoodon obesulus) and swamp wallabies (Wallabia bicolor) increased in both activity and range after the reduction in the fox population indicating that fox predation may act to limit both the total size of populations and types of vegetation occupied by indigenous mammals in small patches of remnant vegetation.

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Porteus, Tom A., Jonathan C. Reynolds, and Murdoch K. McAllister. "Modelling the rate of successful search of red foxes during population control." Wildlife Research 46, no. 4 (2019): 285. http://dx.doi.org/10.1071/wr18025.

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Context Relative abundance indices of wildlife can be scaled to give estimates of absolute abundance. Choice of scaling parameter depends on the data available and assumptions made about the relationship between the index and absolute abundance. Predation-mechanics theory suggests that a parameterisation involving the rate of successful search, s, will be useful where the area searched is unknown. An example arises during fox culling on shooting estates in Britain, where detection and cull data from gamekeepers using a spotlight and rifle are available, and can potentially be used to understand the population dynamics of the local population. Aims We aimed to develop an informative prior for s for use within a Bayesian framework to fit a fox population-dynamics model to detection data. Methods We developed a mechanistic model with a rate of successful search parameter for the gamekeeper–fox system. We established a mechanistic prior for s, using Monte Carlo simulation to combine relevant information on its component factors (detection probability, observer field of view and speed of travel). We obtained empirical estimates of s from a distance-sampling study of fox populations using similar survey methods, and used these as data in a Bayesian model to develop a mechanistic–empirical prior. We then applied this informative prior within a state–space model to estimate fox density from fox-detection rate on four estates. Key results The mechanistic–empirical prior for the rate of successful search was lognormally distributed with a median of 2.01 km2 h–1 (CV = 0.56). Underlying assumptions of the parameterisation were met. Local fox-density estimates obtained using informative priors closely reflected regional density. Conclusions A mechanistic understanding of the search process leading to fox detections by gamekeepers, and the use of Bayesian models, allowed the use of diverse sources of information to develop an informative prior for s that was useful in estimating fox density from detection data. Implications Careful use of prior knowledge within a Bayesian modelling framework can reduce uncertainty in population estimates derived from index data, and lead to improved management decisions. The mechanistic approach we have used will have parallel applications in many other contexts.

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Sharp, Andy, Melinda Norton, Chris Havelberg, Wendy Cliff, and Adam Marks. "Population recovery of the yellow-footed rock-wallaby following fox control in New South Wales and South Australia." Wildlife Research 41, no. 7 (2014): 560. http://dx.doi.org/10.1071/wr14151.

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Context Introduced herbivores and carnivores have significantly altered ecosystems across Australia and have been implicated in the decline and extinction of many species, particularly in the arid and semiarid zones. The experimental confirmation of agents of decline is a fundamental step in threatened species management, allowing for an efficient allocation of resources and effective species recovery. Aims Following unsuccessful attempts to increase the abundance of yellow-footed rock-wallaby populations through concerted goat control across the southern extent of their range, the primary aim of our study was to determine whether fox predation was limiting the recovery of wallaby populations. Methods Intensive fox-control programs (1080 baiting) were initiated around wallaby subpopulations in New South Wales and South Australia. Wallaby numbers were monitored for a three-year period before and after the initiation of fox control, and ANCOVA used to examine for differences between the subpopulation’s rate of increase (r). Observational data were used to determine the demographic effects of fox predation on wallaby colonies in New South Wales. Key results Wallaby subpopulations that were treated with fox control increased significantly, while experimental control subpopulations remained at consistently low levels. Juvenile and subadult wallabies were apparent within the treated New South Wales subpopulation, but almost absent from the control subpopulation, suggesting that fox predation focussed primarily on these age classes. Conclusions Fox predation is a major limiting factor for southern wallaby populations and fox control should be the primary management action to achieve species recovery. Implications Although a significant limiting factor, the regulatory effect of fox predation was not assessed and, as such, it cannot be confirmed as being the causal factor responsible for the historic declines in wallaby abundance. The determination of whether fox predation acts in a limiting or regulatory fashion requires further experimentation, but its resolution will have significant implications for the strategic allocation of conservation resources.

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Pastoret, P. P., and B. Brochier. "Epidemiology and control of fox rabies in Europe." Vaccine 17, no. 13-14 (1999): 1750–54. http://dx.doi.org/10.1016/s0264-410x(98)00446-0.

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Schultz, Evan P. "Does the Fox Control Pardons in the Henhouse?" Federal Sentencing Reporter 13, no. 3-4 (2001): 177–79. http://dx.doi.org/10.1525/fsr.2000.13.3-4.177.

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Dissertations / Theses on the topic "Fox control"

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Smith, G. C. "Urban foxes (Vulpes vulpes) and rabies control." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234565.

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Greentree, Carolyn, and n/a. "Experimental evaluation of fox control and the impact of foxes on lambs." University of Canberra. Science &Design, 2000. http://erl.canberra.edu.au./public/adt-AUC20060713.101158.

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Baiting with sodium monofluoroacetate (1080) to protect lambs (Ovis aries) from red foxes (Vulpes vulpes L.) has become more frequent in NSW and other parts of Australia during the last 10 years despite the lack of reported evidence evaluating the effects of fox baiting on lamb survival. NSW Agriculture has developed fox control recommendations aimed at minimising impact, but these guidelines have not been tested experimentally. Defining the extent of a pest problem and the effectiveness of pest control are key components of a strategic approach to vertebrate pest management as it is the damage of pests that justifies their control. This thesis describes an experimental evaluation of the recommended practice of fox control in NSW. The effects of three levels of fox control were tested in the experiment; no treatment, baiting once a year before lambing (the recommended practice) and baiting three times a year (thought to be the maximum farmers would instigate). Each treatment had two replicates. No previous manipulative experiment using synchronous controls and matched replicates has been undertaken to test the effects. The study quantifies the level of fox predation on healthy lambs and the level of predation on lambs that had other causes including illness and mismothering contributing to this fox predation. It also examines the response of the fox population, lamb predation and lambing outcomes to different levels of fox control. The cost effectiveness of fox control is examined in relation to lamb predation and an investigation of the optimum level of fox control is begun. The experiment also provides the first chance to consider the examination of multiple response variables and the scale of field ecology experiments required to recognise a significant response and avoid a Type II error due to between replicate variability even with tightly controlled site selection criteria to standardise experimental sites, and with the synchrony of experimental control and treatment surveys. The study occurred on five sheep properties near Boorowa (34°28'S, 148°32'E) and Murringo (34°18'S, 148°3 1'E) in south-eastern Australia. The terrain was undulating to hilly with a maximum elevation of 660 m above sea level. The main agricultural enterprises in the district are Merino wool, fat lamb and beef cattle production and winter cereal cropping. The native vegetation of Eucalyptus woodland has been mostly cleared, though remnant patches occur. Most of the area is now sown with pasture of Phalaris tuberosa, Lolium spp. and clover Trifolium spp.. The experimental properties grazed self-replacing Merino flocks, primarily for wool production, so lamb survival was vital to the economic operation of the farm. Over 50 selection criteria including lamb survival rates, ewe fertility and bloodline, sheep management practices, climate and habitat features that affect lamb survival, past fox control practices and prey species were used to select sites Sites were representative of most sheep farming properties in the region, but were also extremely similar in factors that affected fox abundance and ewe and lamb survival, thus minimising variation between replicate sites. The manufactured meat baits used to poison foxes contained 3 mg of sodium monofluoroacetate (compound 1080). A replacement baiting program was carried out in 1995 and 1996. Fox control programs were carried out over the experimental units and adjacent buffer zones covering approximately two fox territories, approximately 6km2, around the lambing paddock under study. The recommended fox control practices described by NSW Agriculture also included neighbouring farmers taking part in an extended group baiting program. In all the area baited at varying intensities totalled 3400 km2. Synchronised lambing with neighbours was a further recommended practice to reduce fox predation and was carried out on these sites. Lambing occurred during a six to eight week period in late winter on all sites, a practice known as 'spring lambing', and on many surrounding properties so a surplus of lambs was available to foxes over a relatively short time. The benefits of fox control were measured directly as enhanced lamb survival derived from differences in lamb marking rates between ultrasounded flocks of approximately 1000 ewes and the predation of lambs was measured from over 2000 lamb carcases post-mortemed in 1994, 1995 and 1996. A mean of 138 lambs were expected at ultrasounding from 100 ewes and 113 lambs per 100 ewes were alive at lamb marking. There was no significant (P>0.05) effect of fox control on lambing performance (the number of lambs per 100 ewes that lambed) Fox predation was inferred as the cause of lamb death in a minimum of 0.8% and a maximum of 5.3% of lamb carcases during 1995 and 1996. There was a significant (P<0 05) effect of fox control on the minimum possible percentage of lamb carcases classified as healthy lambs killed by foxes, with the percentage declining from 1.50% (no fox control), to 0.90% (fox control once per year) to 0.25% (fox control three times per year). There was also a significant (P<0.005) effect of fox control on the maximum possible percentage of lamb carcases classified as healthy lambs killed by foxes with the percentage declining from 10.25% (no fox control), to 6.50% (fox control once per year) to 3.75% (fox control three times per year). The observed results were used to estimate the number of treatment replicates needed to be confident of detecting an effect of predator control on lamb marking performance. The estimated numbers were very high if small effects were to be detected. No significant correlation between the fox density and the minimum and maximum possible number of lambs carcases classified as killed by foxes was found. Bait uptake was monitored as were the costs of fox control.

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Porteus, Thomas Allen. "Evaluation of restricted-area culling strategies to control local red fox density." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52847.

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Lethal control of red foxes is often implemented on restricted areas where immigration from neighbouring sources is expected to make it difficult to keep local fox density low. The justification of lethal wildlife control should include demonstrating its effectiveness. To this end, population dynamics modelling may help to assess the performance of different control strategies in a range of real-world circumstances. A Bayesian state-space model for within-year fox population dynamics was developed that could be fitted to data on daily culling effort and success obtained from gamekeepers on shooting estates in Britain. The estimation model included parameters for key population processes within the culling area: immigration, cub recruitment and non-culling mortality. A simulation-estimation study showed that given a minimum of three years’ data the estimation of fox density and demographic parameters was reliable. Informative priors for the key model parameters were constructed using empirical data and meta-analysis. Data from 22 estates were modelled on a two-weekly time-step. Most estates achieved some suppression of the fox population relative to estimated carrying capacity, but few maintained consistently low densities. The number of foxes killed was a poor indicator of culling effectiveness, highlighting the need for modelling. Estimated immigration rates onto estates were typically high, indicating rapid replacement of culled foxes. There was unexpectedly high spatial variation among estates in estimated carrying capacity and immigration rate. There was evidence from a limited subset of estates that the variable density of released game birds may explain this. The food requirement of the fox population during the nesting period was assumed to indicate predation pressure on wild birds. Alternative culling strategies to reduce this requirement were evaluated using posterior parameter estimates from some estates. Culling concentrated in spring and summer only was more effective than culling uniformly throughout the year. Autumn-only culling was not an effective strategy for wild birds. Open-loop strategies were most effective as culling effort was used all the time. However, closed-loop strategies, where culling effort was conditional on feedback from simulated field-sign searches, achieved similar effects on food requirements using less effort. This revealed trade-offs between effectiveness, cost and animal welfare.<br>Science, Faculty of<br>Zoology, Department of<br>Graduate

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Furlong, Michael John. "The impact of a generalist predator, the red fox (Vulpes vulpes), on its main prey populations." Thesis, University of Bristol, 2000. http://hdl.handle.net/1983/927e8373-6f96-4637-a525-0ca219c900e7.

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Lizarraga, Mariano I. "Autonomous landing system for a UAV." Thesis, Monterey California. Naval Postgraduate School, 2004. http://hdl.handle.net/10945/1655.

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Approved for public release, distribution is unlimited<br>This thesis is part of an ongoing research conducted at the Naval Postgraduate School to achieve the autonomous shipboard landing of Unmanned Aerial Vehicles (UAV). Two main problems are addressed in this thesis. The first is to establish communication between the UAV's ground station and the Autonomous Landing Flight Control Computer effectively. The second addresses the design and implementation of an autonomous landing controller using classical control techniques. Device drivers for the sensors and the communications protocol were developed in ANSI C. The overall system was implemented in a PC104 computer running a real-time operating system developed by The Mathworks, Inc. Computer and hardware in the loop (HIL) simulation, as well as ground test results show the feasibility of the algorithm proposed here. Flight tests are scheduled to be performed in the near future.<br>Lieutenant Junior Grade, Mexican Navy

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D'Amelio, Jeffrey David. "Development of a Digital Controller for Motor Control Experiments in the EE472 Lab." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1339.

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A digital motor controller for student lab use is designed, built, and tested. The controller uses an encoder for position measurement, and an H-bridge to drive the electromechanical plant. A user interface is created to enhance usability of the device. The user interface is able to display key parameters of the control algorithm as well as the state of the system. It is also used to modify the gains and sample rate of the control algorithm. The design of the system is refined, and 10 units are built for the EE472 Digital Controls Lab. The lab manuals for the first 4 experiments are revised to match and support the new system. The possible future for the project is described with some suggestions for improving the system.

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Agbi, Clarence. "Scalable and Robust Designs of Model - Based Control Strategies for Energy - Efficient Buildings." Research Showcase @ CMU, 2014. http://repository.cmu.edu/dissertations/333.

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In the wake of rising energy costs, there is a critical need for sustainable energy management of commercial and residential buildings. Buildings consume approximately 40% of total energy consumed in the US, and current methods to reduce this level of consumption include energy monitoring, smart sensing, and advanced integrated building control. However, the building industry has been slow to replace current PID and rule-based control strategies with more advanced strategies such as model-based building control. This is largely due to the additional cost of accurately modeling the dynamics of the building and the general uncertainty that model-based controllers can be reliably used in real conditions. The first half of this thesis addresses the challenge of constructing accurate grey-box building models for control using model identification. Current identification methods poorly estimate building model parameters because of the complexity of the building model structure, and fail to do so quickly because these methods are not scalable for large buildings. Therefore, we introduce the notion of parameter identifiability to determine those parameters in the building model that may not be accurately estimated and we use this information to strategically improve the identifiability of the building model. Finally, we present a decentralized identification scheme to reduce the computational effort and time needed to identify large buildings. The second half of this thesis discusses the challenge of using uncertain building models to reliably control building temperature. Under real conditions, building models may not match the dynamics of the building, which directly causes increased building energy consumption and poor thermal comfort. To reduce the impact of model uncertainty on building control, we pose the model-based building control problem as a robust control problem using well-known H1 control methods. Furthermore, we introduce a tuning law to reduce the conservativeness of a robust building control strategy in the presence of high model uncertainty, both in a centralized and decentralized building control framework.

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JÃnior, AntÃnio Barbosa de Souza. "Hybrid position controller for an field-oriented induction motor drive." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=13468.

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CoordenaÃÃo de AperfeÃoamento de Pessoal de NÃvel Superior<br>This work describes the study and implementation of a hybrid control technique applied to the positioning of the rotor shaft in a three-phase induction motor (IM). The machine has been modeled using the field oriented control (FOC) strategy. In additional, it is used three controllers to obtain the design of the position loop, each one with different operating characteristics. Initially, two constant gain controllers are associated with the position loop diagram in the FOC technique in order to obtain a fastest response, with disturbance rejection and without overshoot. Therefore, it used a Proportional (P) controller based on Ziegler-Nichols tuning method so that a faster system response is achieved and a predictive control strategy called Generalized Predictive Control (GPC), based on Proportional â Integral controller tuning form, to smooth the overshoot caused by the P controller. Subsequently, seeking a more efficient performance of the position control in the IM, It used a control strategy based on fuzzy logic that takes into account the weighting of P and GPC controllers together. For purposes of validation, simulations and experimental results of the P, GPC and hybrid control strategies are presented. The simulation was set up in Matlab/Simulink and the experimental plant was implemented with a Digital Signal Controller (DSC), manufactured by Texas Instruments TMS320F2812. Analyzing the results, the Proportional demonstrated the fastest reference tracking, among the others techniques, with a settling time of 0.25 seconds, however with overshoot. The GPC controller presented a longer accommodation time, about 2 seconds and without overshoot. The application of the hybrid proposed technique combine the fast tracking reference of the P controller, about 1 second to reach the reference, and without overshoot as in the GPC controller results. Besides, the robust characteristic of both controllers was maintained in the hybridization proposed technique.<br>Este trabalho descreve o estudo e implementaÃÃo de uma tÃcnica de controle hÃbrida aplicada ao posicionamento do eixo de um motor de induÃÃo trifÃsico (MIT). O motor de induÃÃo foi modelado usando-se a estratÃgia de controle de campo orientado a fim de projetar para a malha de posiÃÃo trÃs controladores, cada um com diferentes caracterÃsticas de operaÃÃo. Neste caso, incorporou-se inicialmente Ã malha de posiÃÃo da estratÃgia de controle de campo orientado a aÃÃo de dois controladores de ganho constante com o objetivo de posicionar o eixo de forma rÃpida, com pouco sobressinal e com rejeiÃÃo Ã perturbaÃÃo. Desta forma, utilizou-se um controlador Proporcional (P) com sintonia baseada em Ziegler-Nichols de modo a se obter uma caracterÃstica mais rÃpida do sistema e, uma estratÃgia de controle preditivo denominada de GPC (Generalized Predictive Control) com o objetivo de suavizar a aÃÃo do controlador P em termos de elevado sobressinal considerando a sintonia do controlador GPC baseada em um controlador Proporcional-Integral (PI). Posteriormente, para se obter um desempenho mais eficiente do controle de posiÃÃo do MIT, utilizou-se uma estratÃgia de controle baseada em lÃgica fuzzy de modo a se levar em conta a ponderaÃÃo dos controladores P e GPC, conjuntamente. Para fins de validaÃÃo sÃo apresentados resultados da aplicaÃÃo das estratÃgias de controle P, GPC e hÃbrida no controle de posiÃÃo do MIT a partir de simulaÃÃes em ambiente Matlab/Simulink e atravÃs da implementaÃÃo do sistema de controle de posiÃÃo utilizando-se um processador digital de sinais, o DSP TMS320F2812 fabricado pela Texas Instruments. A partir dos resultados encontrados, o Proporcional demonstrou um rÃpido seguimento de referÃncia, dentre as tÃcnicas utilizadas, com tempo de acomodaÃÃo experimental de 0,25 segundos, porÃm com sobressinal. O controlador GPC apresentou um tempo de acomodaÃÃo maior, cerca de 2 segundos e sem sobressinal. A aplicaÃÃo da tÃcnica hÃbrida proposta conseguiu combinar o rÃpido seguimento de referÃncia do Proporcional, levando cerca de 1 segundo para alcanÃar a referÃncia, e sem sobressinal como o controlador GPC. AlÃm do que, como os controladores possuem uma caracterÃstica robusta tambÃm se garantiu essa propriedade para o hibridismo proposto.

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Abbaspour, Ali Reza. "Active Fault-Tolerant Control Design for Nonlinear Systems." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3917.

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Faults and failures in system components are the two main reasons for the instability and the degradation in control performance. In recent decades, fault-tolerant control (FTC) approaches were introduced to improve the resiliency of the control system against faults and failures. In general, FTC techniques are classified into two major groups: passive and active. Passive FTC systems do not rely on the fault information to control the system and are closely related to the robust control techniques while an active FTC system performs based on the information received from the fault detection and isolation (FDI) system, and the fault problem will be tackled more intelligently without affecting other parts of the system. This dissertation technically reviews fault and failure causes in control systems and finds solutions to compensate for their effects. Recent achievements in FDI approaches, and active and passive FTC designs are investigated. Thorough comparisons of several different aspects are conducted to understand the advantages and disadvantages of different FTC techniques to motivate researchers to further developing FTC, and FDI approaches. Then, a novel active FTC system framework based on online FDI is presented which has significant advantages in comparison with other state of the art FTC strategies. To design the proposed active FTC, a new FDI approach is introduced which uses the artificial neural network (ANN) and a model based observer to detect and isolate faults and failures in sensors and actuators. In addition, the extended Kalman filter (EKF) is introduced to tune ANN weights and improve the ANN performance. Then, the FDI signal combined with a nonlinear dynamic inversion (NDI) technique is used to compensate for the faults in the actuators and sensors of a nonlinear system. The proposed scheme detects and accommodates faults in the actuators and sensors of the system in real-time without the need of controller reconfiguration. The proposed active FTC approach is used to design a control system for three different applications: Unmanned aerial vehicle (UAV), load frequency control system, and proton exchange membrane fuel cell (PEMFC) system. The performance of the designed controllers are investigated through numerical simulations by comparison with conventional control approaches, and their advantages are demonstrated.

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Polston, James D. "DECENTRALIZED ADAPTIVE CONTROL FOR UNCERTAIN LINEAR SYSTEMS: TECHNIQUES WITH LOCAL FULL-STATE FEEDBACK OR LOCAL RELATIVE-DEGREE-ONE OUTPUT FEEDBACK." UKnowledge, 2013. http://uknowledge.uky.edu/me_etds/24.

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This thesis presents decentralized model reference adaptive control techniques for systems with full-state feedback and systems with output feedback. The controllers are strictly decentralized, that is, each local controller uses feedback from only local subsystems and no information is shared between local controllers. The full-state feedback decentralized controller is effective for multi-input systems, where the dynamics matrix and control-input matrix are unknown. The decentralized controller achieves asymptotic stabilization and command following in the presence of sinusoidal disturbances with known spectrum. We present a construction technique of the reference-model dynamics such that the decentralized controller is effective for systems with arbitrarily large subsystem interconnections. The output-feedback decentralized controller is effective for single-input single-output subsystems that are minimum phase and relative degree one. The decentralized controller achieves asymptotic stabilization and disturbance rejection in the presence of an unknown disturbance, which is generated by an unknown Lyapunov-stable linear system.

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Books on the topic "Fox control"

1

Fisk, Gregory G. Discharge ratings for control structures at McHenry Dam on the Fox River, Illinois. Dept. of the Interior, U.S. Geological Survey, 1988.

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Bailey, Edgar P. Introduction of foxes to Alaskan islands: History, effects on avifauna, and eradication. U.S. Dept of the Interior, Fish and Wildlife Service, 1993.

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Bailey, Edgar P. Introduction of foxes to Alaskan islands: History, effects on avifauna, and eradication. U.S. Dept. of the Interior, Fish and Wildlife Service, 1993.

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Clegg, Elizabeth. The Scott Report: Implications for UK export policy. Saferworld, 1996.

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Harvey, Gill. Ball control. EDC Pub., 1996.

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Harvey, Gill. Ball control. EDC Pub., 1996.

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Montana. Division of Workers' Compensation. Bureau of Safety. Loss control program. The Bureau, 1985.

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Right first time: Using quality control for profit. Wildwood House, 1986.

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Kachroo, Pushkin. Feedback control theory for dynamic traffic assignment. Springer, 1999.

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How to control your anger (before it controls you): A guide for teens. Johnson Institute, 1998.

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Book chapters on the topic "Fox control"

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Kushner, Harold J. "Existence of Optimal Controls for Variance Control." In Stochastic Analysis, Control, Optimization and Applications. Birkhäuser Boston, 1999. http://dx.doi.org/10.1007/978-1-4612-1784-8_25.

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Lunau, Stephan, Renata Meran, Alexander John, Olin Roenpage, and Christian Staudter. "Control." In Management for Professionals. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35882-1_6.

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Bradley, Aaron R. "Control." In Programming for Engineers. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-23303-6_2.

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Sagerer, Gerhard, and Heinrich Niemann. "Control." In Semantic Networks for Understanding Scenes. Springer US, 1997. http://dx.doi.org/10.1007/978-1-4899-1913-7_6.

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Turner, J. D., and A. J. Pretlove. "Noise control." In Acoustics for Engineers. Macmillan Education UK, 1991. http://dx.doi.org/10.1007/978-1-349-21267-5_8.

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Uren, J., and W. F. Price. "Control Surveys." In Surveying for Engineers. Macmillan Education UK, 1994. http://dx.doi.org/10.1007/978-1-349-12950-8_7.

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Jaulin, Luc. "Linear Control." In Automation for Robotics. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119081326.ch4.

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Jaulin, Luc. "Linearized Control." In Automation for Robotics. John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119081326.ch5.

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Vanhoucke, Mario. "Schedule Control." In Management for Professionals. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04331-9_7.

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Pakdil, Fatma. "Control Phase: C Is for Control." In Six Sigma for Students. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40709-4_11.

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Conference papers on the topic "Fox control"

1

Shinkai, Takumi, Wang Hui, Hiroyuki Ishihara, Yuichi Nishida, Yukinobu Fukushima, and Tokumi Yokohira. "A solution to transmission halting in a new flow control method TCP-fox." In 2012 18th Asia-Pacific Conference on Communications (APCC). IEEE, 2012. http://dx.doi.org/10.1109/apcc.2012.6388193.

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Cooper, R. A. "FOX; early experience with a new environmental control system which uses low power radio links for communication." In IEE Colloquium on `Mechatronic Aids for the Disabled'. IEE, 1995. http://dx.doi.org/10.1049/ic:19950686.

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Yuan, X.-C. "Plasmonic manipulation through light control and its applications in microscopic imaging and sensing." In 2011 Functional Optical Imaging (FOI). IEEE, 2011. http://dx.doi.org/10.1109/foi.2011.6154829.

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Sasaki, Akio, Shigeo Fujita, and Yoshikazu Takeda. "Devices for control of light amplification." In Conference on Lasers and Electro-Optics. OSA, 1986. http://dx.doi.org/10.1364/cleo.1986.fo2.

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Besset, Pierre, and C. James Taylor. "Inverse kinematics for a redundant robotic manipulator used for nuclear decommissioning." In 2014 UKACC International Conference on Control (CONTROL). IEEE, 2014. http://dx.doi.org/10.1109/control.2014.6915115.

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Zaza, Theopisti, and Arthur Richards. "Ant Colony Optimization for routing and tasking problems for teams of UAVs." In 2014 UKACC International Conference on Control (CONTROL). IEEE, 2014. http://dx.doi.org/10.1109/control.2014.6915216.

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Kaneko, Testuya, Yukiyo Kuriyagawa, and Ichiro Kageyama. "Calculation algorithm for motion control target for the platooning of autonomous heavy vehicles." In 2014 UKACC International Conference on Control (CONTROL). IEEE, 2014. http://dx.doi.org/10.1109/control.2014.6915224.

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Farrugia, Jean Luc, and Simon G. Fabri. "Swarm Robotics for Object Transportation." In 2018 UKACC 12th International Conference on Control (CONTROL). IEEE, 2018. http://dx.doi.org/10.1109/control.2018.8516829.

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Kalaivani, R., P. Lakshmi, and K. Sudhagar. "Hybrid (DEBBO) Fuzzy Logic Controller for quarter car model: DEBBOFLC for Quarter Car model." In 2014 UKACC International Conference on Control (CONTROL). IEEE, 2014. http://dx.doi.org/10.1109/control.2014.6915157.

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Xenos, Dionysios P., Nina F. Thornhill, Matteo Cicciotti, and Ala E. F. Bouaswaig. "Preprocessing of raw data for developing steady-state data-driven models for optimizing compressor stations." In 2014 UKACC International Conference on Control (CONTROL). IEEE, 2014. http://dx.doi.org/10.1109/control.2014.6915180.

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Reports on the topic "Fox control"

1

Gölles, Markus, Viktor Unterberger, Valentin Kaisermayer, Thomas Nigitz, and Daniel Muschick. Supervisory control of large-scale solar thermal systems. IEA SHC Task 55, 2021. http://dx.doi.org/10.18777/ieashc-task55-2021-0001.

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Overview on different approaches for supervisory control strategies, deciding on operating modes and set points for the controls of the different plants and components integrated in solar thermal systems.

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Subbarao, Krishnappa, Jason C. Fuller, Karanjit Kalsi, Jianming Lian, and Ebony T. Mayhorn. Transactive Control and Coordination of Distributed Assets for Ancillary Services: Controls, Markets and Simulations. Office of Scientific and Technical Information (OSTI), 2015. http://dx.doi.org/10.2172/1411942.

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Shaver, Greg, and Miles Droege. Develop and Deploy a Safe Truck Platoon Testing Protocol for the Purdue ARPA-E Project in Indiana. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317314.

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Hilly terrain poses challenges to truck platoons using fixed set speed cruise control. Driving the front truck efficiently on hilly terrain improves both trucks fuel economies and improves gap maintenance between the trucks. An experimentally-validated simulation model was used to show fuel savings for the platoon of 12.3% when the front truck uses long horizon predictive cruise control (LH-PCC), 8.7% when the front truck uses flexible set speed cruise control, and only 1.2% when the front truck uses fixed set speed cruise control. Purdue, Peloton, and Cummins have jointly configured two Peterbilt 579 trucks for relevant combinations of: (1) coordinated shifting, (2) constant or variable platoon gap controls, (3) flexible or constant speed setpoint cruise control of the front trucks, and (4) long-horizon predictive cruise control (LHPCC) of the front truck. Confirmation of this functionality during platooning was demonstrated at the Continental Test track in Uvalde, Texas. In Indiana, on-road experiments were limited to single truck operation with long-horizon predictive cruise control, flexible set speed cruise control, and constant setpoint cruise control. Data from all of the above was used to improve the fidelity of simulations used to arrive at the fuel savings and gap control findings for hilly terrain per what is summarized in the findings section. Additionally, in early summer 2020, Purdue submitted to, and received improvement from, INDOT for a safe truck platoon testing protocol (located in this report’s appendix), which could not be implemented in Indiana before the end of the project because of COVID-19. Presentations of the subject matter at COMVEC, MAASTO, Purdue Road School, and the Work Truck Show are listed in the appendix.

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Sarker, Z., C. Perkins, V. Singh, and M. Ramalho. RTP Control Protocol (RTCP) Feedback for Congestion Control. RFC Editor, 2021. http://dx.doi.org/10.17487/rfc8888.

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Feierl, Lukas, and Peter Luidolt. Automated monitoring, failure detection of key components, control strategies and self-learning controls of key components. IEA SHC Task 55, 2020. http://dx.doi.org/10.18777/ieashc-task55-2020-0005.

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Bodson, Marc. Constrained Control Allocation Methods for Reconfigurable Flight Control Laws. Defense Technical Information Center, 2000. http://dx.doi.org/10.21236/ada381657.

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Shreve, S. E., and V. J. Mizel. Optimal Control with Diminishing and Zero Cost for Control. Defense Technical Information Center, 1985. http://dx.doi.org/10.21236/ada182805.

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Soatto, Stefano. Dynamic Vision for Control. Defense Technical Information Center, 2009. http://dx.doi.org/10.21236/ada495410.

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Soatto, Stefano. Dynamic Vision for Control. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada452025.

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Morari, M. Modeling for process control. Office of Scientific and Technical Information (OSTI), 1991. http://dx.doi.org/10.2172/5951697.

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