Relevant bibliographies by topics / Delay compensator

Academic literature on the topic 'Delay compensator'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Delay compensator.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Delay compensator"

1

Wang, Hui Yu, Yong Zhang, and Jian Zhang. "Study on Real-Time Control of Power System Stability." Applied Mechanics and Materials 511-512 (February 2014): 1137–40. http://dx.doi.org/10.4028/www.scientific.net/amm.511-512.1137.

Full text
Abstract:
This paper presents the design method Delays affect static var compensator WAN additional damping controller, containing static var compensator new power system, for example, through a controlled modal analysis to select Static Analysis conventional additional damping drawing's power compensator WAN input signal is calculated using the residue method to get its parameters, and then analyzed using delay-dependent stability criterion of conventional reactive power compensator damping controller contains additional stationary Delay power system stability, finalized the SVC gain additional damping controller based on delay stability analysis, the results show Delay Considered static var compensator additional damping controller not only can improve the damping characteristics of the system, but also has a certain time lag robustness.
APA, Harvard, Vancouver, ISO, and other styles
2

Li, Ge, Gang Shen, Zhen-Cai Zhu, Xiang Li, and Wan-Shun Zang. "Sine phase compensation combining an amplitude phase controller and a discrete feed-forward compensator for electro-hydraulic shaking tables." Transactions of the Institute of Measurement and Control 40, no. 11 (September 5, 2017): 3377–89. http://dx.doi.org/10.1177/0142331217723702.

Full text
Abstract:
This article presents a novel control strategy on an electro-hydraulic shaking table under the acceleration control combining an amplitude phase controller and a zero phase error tracking controller with a discrete feed-forward compensator. Because of the electro-hydraulic system’s nonlinearity, phase delay and amplitude attenuation exist in the acceleration response signal inevitably when the electro-hydraulic shaking table system is excited by a sine vibration signal. Moreover, the phase delay of the electro-hydraulic shaking table is composed of phase deviation and actuator delay. For improving the acceleration tracking accuracy, an amplitude phase controller is employed to compensate the phase deviation and amplitude attenuation by introducing weights to adjust the reference signal. Meanwhile, the discrete feed-forward compensator is applied to compensate the actuator delay. As an offline compensator, the zero phase error tracking controller is employed to compensate the phase delay of the response signal and improve the convergence speed of the proposed controller. Overall, the proposed control strategy combines the merits of these three controllers with better tracking performance demonstrated by simulation and experimental results.
APA, Harvard, Vancouver, ISO, and other styles
3

Wang, Yaoyao, Bai Chen, and Hongtao Wu. "Practical continuous fractional-order nonsingular terminal sliding mode control of underwater hydraulic manipulators with valve deadband compensators." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 232, no. 4 (February 1, 2018): 459–69. http://dx.doi.org/10.1177/1475090217753900.

Full text
Abstract:
For the multi-degrees of freedom control problem of underwater hydraulic manipulators with non-ignorable valve deadband and strong lumped nonlinearities and uncertainties, a practical continuous fractional-order nonsingular terminal sliding mode control design together with a deadband compensator is presented and studied. The presented method contains three parts a time delay estimation utilized to nearly estimate and compensate the extremely complicated system dynamics, a continuous fractional-order nonsingular terminal sliding mode used to ensure high control performance against the strong lumped nonlinearities and uncertainties, and a valve deadband compensator used to compensate for the non-ignorable valve deadband. The proposed method is model-free thanks to the time delay estimation, and can ensure satisfactory control performance thanks to the continuous fractional-order nonsingular terminal sliding mode and deadband compensator. Stability of the closed-loop control system including the deadband compensator is proved rigorously. Finally, practical 2-degrees of freedom experiments are performed, and corresponding results effectively demonstrate the superiorities of the newly presented controller with deadband compensator.
APA, Harvard, Vancouver, ISO, and other styles
4

Li, Zhenyu, Bin Wang, Haitao Yang, and Hong Liu. "Rapid satellite capture by a space robot based on delay compensation." Industrial Robot: An International Journal 44, no. 3 (May 15, 2017): 363–76. http://dx.doi.org/10.1108/ir-07-2016-0193.

Full text
Abstract:
Purpose Rapid satellite capture by a free-floating space robot is a challenge problem because of no-fixed base and time-delay issues. This paper aims to present a modified target capturing control scheme for improving the control performance. Design/methodology/approach For handling such control problem including time delay, the modified scheme is achieved by adding a delay calibration algorithm into the visual servoing loop. To identify end-effector motions in real time, a motion predictor is developed by partly linearizing the space robot kinematics equation. By this approach, only ground-fixed robot kinematics are involved in the predicting computation excluding the complex space robot kinematics calculations. With the newly developed predictor, a delay compensator is designed to take error control into account. For determining the compensation parameters, the asymptotic stability condition of the proposed compensation algorithm is also presented. Findings The proposed method is conducted by a credible three-dimensional ground experimental system, and the experimental results illustrate the effectiveness of the proposed method. Practical implications Because the delayed camera signals are compensated with only ground-fixed robot kinematics, this proposed satellite capturing scheme is particularly suitable for commercial on-orbit services with cheaper on-board computers. Originality/value This paper is original as an attempt trying to compensate the time delay by taking both space robot motion predictions and compensation error control into consideration and is valuable for rapid and accurate satellite capture tasks.
APA, Harvard, Vancouver, ISO, and other styles
5

Agamennoni, O. E., A. C. Desages, and J. A. Romagnoli. "A multivariable delay compensator scheme." Chemical Engineering Science 47, no. 5 (April 1992): 1173–85. http://dx.doi.org/10.1016/0009-2509(92)80239-9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Wen, Fuming Han, Zhanfeng Chen, Ruijin Wang, Chuanyong Wang, Keqing Lu, Jiahui Wang, and Bingfeng Ju. "Modeling and Compensation for Asymmetrical and Dynamic Hysteresis of Piezoelectric Actuators Using a Dynamic Delay Prandtl–Ishlinskii Model." Micromachines 12, no. 1 (January 16, 2021): 92. http://dx.doi.org/10.3390/mi12010092.

Full text
Abstract:
Piezoelectric actuators are widely used in micro- and nano-manufacturing and precision machining due to their superior performance. However, there are complex hysteresis nonlinear phenomena in piezoelectric actuators. In particular, the inherent hysteresis can be affected by the input frequency, and it sometimes exhibits asymmetrical characteristic. The existing dynamic hysteresis model is inaccurate in describing hysteresis of piezoelectric actuators at high frequency. In this paper, a Dynamic Delay Prandtl–Ishlinskii (DDPI) model is proposed to describe the asymmetrical and dynamic characteristics of piezoelectric actuators. First, the shape of the Delay Play operator is discussed under two delay coefficients. Then, the accuracy of the DDPI model is verified by experiments. Next, to compensate the asymmetrical and dynamic hysteresis, the compensator is designed based on the Inverse Dynamic Delay Prandtl–Ishlinskii (IDDPI) model. The effectiveness of the inverse compensator was verified by experiments. The results show that the DDPI model can accurately describe the asymmetrical and dynamic hysteresis, and the compensator can effectively suppress the hysteresis of the piezoelectric actuator. This research will be beneficial to extend the application of piezoelectric actuators.
APA, Harvard, Vancouver, ISO, and other styles
7

Prasanna, Velpula Lakshmi. "Controlling the Mitigating Impacts of Communication Delay on Load Frequency Control with an Adaptive Method." International Journal for Research in Applied Science and Engineering Technology 9, no. 11 (November 30, 2021): 1521–36. http://dx.doi.org/10.22214/ijraset.2021.39052.

Full text
Abstract:
Abstract: Load Frequency Control is one of the most essential frequency management technologies in modern power systems (LFC). When employing LFC over a vast region, communication latency is unavoidable. A delay might not only affect system performance but also cause system instability. An alternate design strategy for constructing delay compensators for LFC in one or more control areas utilising an AFPI controller and ANFIS is proposed in this paper. For one-area LFC, a sufficient and required condition for designing a delay compensator is described. It is demonstrated that for multi-area LFC with Area Control Errors (ACEs), each control area can have its own delay controller designed as if it were a one-area system if the index of coupling among the areas is less than the small gain theorem's threshold value. The effectiveness of the proposed technique is validated by simulation experiments on LFCs with communication delays in one and multiple interconnected areas with and without time variable delays.
APA, Harvard, Vancouver, ISO, and other styles
8

Xia, Qiu, Long Chen, Xing Xu, Yingfeng Cai, Haobin Jiang, and Guangxiang Pan. "Expected yaw rate–based trajectory tracking control with vision delay for intelligent vehicle." Science Progress 103, no. 3 (July 2020): 003685042093427. http://dx.doi.org/10.1177/0036850420934274.

Full text
Abstract:
Accurate and real-time position of preview point is significant to trajectory tracking control of vision-guided intelligent vehicle. The unavoidable delay of road automatic identification system weakens trajectory tracking control performance, and even deteriorates the vehicle stability. Therefore, a compensator for the delay of road automatic identification system was proposed which combines the current statistical model and adaptive Kalman predictor to estimate the state of preview point position. The trajectory tracking sliding mode controller of intelligent vehicle is established through a 2–degrees of freedom vehicle dynamic model and motion model by using MATLAB/Simulink and CarSim. The trajectory tracking performance under 20–100 ms delay is analyzed. The simulation results show that the trajectory tracking performance of intelligent vehicle will be affected by the delay of road automatic identification system, reducing tracking accuracy. And when the delay is too large, it will deteriorate the vehicle stability and safety. In addition, the simulation results also verify the effectiveness of current statistical–adaptive Kalman predictor compensator at different delays.
APA, Harvard, Vancouver, ISO, and other styles
9

Wójcik, Waldemar, Piotr Kisała, Gulbahar Yussupova, Nazym Kussambayeva, Gulzhan Kashaganova, and Damian Harasim. "Analysis of the Possibilities for Using a Uniform Bragg Grating in a Tunable Dispersion Compensator." International Journal of Electronics and Telecommunications 61, no. 4 (December 1, 2015): 381–87. http://dx.doi.org/10.2478/eletel-2015-0050.

Full text
Abstract:
Abstract The article presents a tunable fibre optic dispersion compensator system, consisting of a specially designed cantilever beam and a uniform Bragg grating. It analyses the group delay and dispersion characteristics in the case that there is no apodization of the grating and also for a grating with apodization used for modulation of the refractive index. Various apodization parameters were tested, along with their effects on the dispersion characteristics of the entire system properties. It is demonstrated in the paper that the apodization parameter affects the compensator’s group delay characteristic. The finite elements method was used to design a compensator of such a shape that enabled chirp to be induced in a grating of a specified shape. A new design is presented for the system, in which the dispersion properties are tuned by the maximum value of the heterogeneous deformation of the compensator. The paper also includes results showing the effect of the maximum value of heterogeneous stress of the grating on the dispersion characteristics of the proposed construction.
APA, Harvard, Vancouver, ISO, and other styles
10

Murakami, Iwanori, Nghia Thi Mai, Kou Yamada, Takaaki Hagiwara, Yoshinori Ando, and Hideharu Yamamoto. "A Design Method for Modified Smith Predictors for Non-Minimum-Phase Time-Delay Plants with Multiple Feedback-Connected Time-Delays." Applied Mechanics and Materials 36 (October 2010): 253–62. http://dx.doi.org/10.4028/www.scientific.net/amm.36.253.

Full text
Abstract:
In this paper, we examine a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays. The Smith predictor is proposed by Smith to overcome time-delay and known as an effective time-delay compensator for a plant with large time-delay. The Smith predictor by Smith cannot be used for plants having an integral mode, because a step disturbance will result in a steady state error. Several papers considered the problem to design modified Smith predictors for unstable plants. However, no paper examines a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays. In this paper, we examine a design method for modified Smith predictors for non-minimum-phase time-delay plants with multiple feedback-connected time-delays.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Delay compensator"

1

Maiolini, Jacopo. "On delay compensation control for systems with distributed input delay." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

Find full text
Abstract:
Questa tesi riguarda lo sviluppo di una nuova tecnica di controllo chiamata Delay Compensation per sistemi scalari che presentano un ritardo distribuito nei canali di ingresso. Lo scopo principale è di compensare realmente il lag intrinseco del sistema per un dato instante T_0. Esistono, infatti, alcune tecniche già utilizzate in questo ambito, chiamate predictor-like, che assegnano uno spettro stabile in closed-loop solamente dopo che il sistema è stato soggetto a tutto il ritardo presente in ingresso, non riuscendo perciò a compensarlo esattamente. L'obbiettivo secondario è dovuto a delle approssimazioni scaturite dall'implementazione in controllori real-time di questi controlli. Tutte le tecniche di cui sopra, inclusa Delay Compensation, necessitano infatti di un controllo anch'esso distribuito. Quando ci si scontra con la realtà, l'integrale di controllo deve essere approssimato tramite un integrazione numerica. Negli anni questa non idealità è stata ampiamente studiata, in particolar modo per il controllo Finite Spectrum Assignment (FSA) che verrà, nel caso di ritardi distribuiti di ingresso, relazionato con la tecnica Delay Compensation qui introdotta. Differenti metodi di quadratura verranno utilizzati e confrontati, per l'approssimazione dell'integrale di controllo, effettuando un analisi sia nel dominio del tempo sia nel dominio delle frequenze. Verrà poi effettuata un'estensione della tecnica nel caso di sistemi vettoriali, con dimostrazione annessa della validità nell'utilizzo del controllo Delay Compensation in questo frangente. Anche se non è presente una dimostrazione rigorosa dell'applicabilità del controllo Delay Compensation anche nel caso di un sistema Multi-Input, nella tesi sono presenti alcuni risultati considerando una semplificazione nel sistema controllato. La tesi si conclude elencando gli aspetti positivi e negativi derivanti dall'applicazione della tecnica Delay Compensation qui presentata e da un'indicazione di futuri sviluppi.
APA, Harvard, Vancouver, ISO, and other styles
2

Iwanaga, Mauricio Kiotsune. "Development of a virtual pipe test rig for testing acoustic correlators for leak detection in buried water pipes /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183466.

Full text
Abstract:
Orientador: Michael John Brennan
Resumo: Vazamentos em tubulações de água enterradas são considerados um importante problema já que uma grande quantidade de água é desperdiçada entre a planta de tratamento e os consumidores. Para lidar com tal problema, companhias de saneamento utilizam dispostivos para localizar vazamentos nas tubulações. Dispositivos de escuta e correlacionadores de ruídos são os equipamentos mais utilizados em campo pelas companhias de sanemaneto ao redor do mundo. Correlacionadores de ruídos são dispositivos usados na localização de vazamentos em tubulações enterradas através da estimativa do tempo de atraso entre os sinais medidos pelos sensores posicionados em ambos os lados de um suposto vazamento. Uma vez que as companhias de saneamento devem decidir qual tipo de correlacionador é o mais compatível com a sua rede de tubulações, elas devem realizar alguns testes para ajudar em tal decisão e para treinar os funcionários que operam estes dispositivos, os quais devem ser expostos a diferentes condições, tais como tubos de diferentes materiais e geometrias, diferentes tipos de solo, vazamentos com diferentes intensidades, etc. Neste contexto, o principal objetivo desta pesquisa é contribuir com esta necessidade através da elaboração de um dispositivo de bancada capaz de reproduzir as vibrações de um tubo causadas por um vazamento. O dispositivo, chamado de simulador virtual de vazamentos, é composto por um computador, um amplificador de potência com dois canais e dois shakers. Ruídos de vazamento... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Leakage in buried water pipes is an important problem since a large amount of water is wasted between the treatment plant and the consumers. To deal with such a problem, water companies have used some devices to localize leaks in the pipe network. Listening devices and leak noise correlators are the most popular equipment used in the field by the water companies around the world. Leak noise correlators are important devices used to localize leaks in buried pipes by calculating the time delay between the signals measured by the sensors positioned either side of a suspected leak. Since water companies have to decide which leak noise correlator is more suitable for each pipe network, they have to carry out some field tests to assist in this decision and to train the personnel that handles such a device, which ideally must be exposed to different conditions, such as pipes with different materials and geometries, different types of soil, different leak strengths, etc. The main objective of this research project is to contribute with the necessity of the water companies by designing an indoor bench-top device capable to reproduce the pipe vibrations generated by a leak in the field. The device, called virtual pipe test rig, comprises a computer and a dual-channel power amplifier supplying two shakers. In the computer, leak noise is synthesized by using a model of a buried leaking pipe implemented using the software Matlab®. Since the systems, composed by the power amplifiers and th... (Complete abstract click electronic access below)
Mestre
APA, Harvard, Vancouver, ISO, and other styles
3

Kwok, Wilfred. "Automating Radiotherapy: Parameterizations of Sensor Time Delay Compensators and the Separation Principle." Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/954.

Full text
Abstract:
Motivated by recent research to automate radiotherapy, this thesis looks into feedback control problems where the feedback sensor imposes considerable time delay. The use of an asymptotic estimator is considered as a method to compensate for the time delay. Properties and parameterizations of asymptotic estimators are analyzed. It is shown that if such a delay compensation scheme is adopted, a separation principle holds, which allows for independent design of the feedback controller and the time delay compensator. The radiotherapy problem is used as a case study to show how asymptotic estimators may be designed, exploiting the separation principle. Lastly, the thesis considers multivariable versions of asymptotic estimators.
APA, Harvard, Vancouver, ISO, and other styles
4

Moraes, Vitor Mateus. "Delay-dependent output feedback compensators for a class of networked control systems." reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/128874.

Full text
Abstract:
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Automação e Sistemas, Florianópolis, 2014
Made available in DSpace on 2015-02-05T20:26:24Z (GMT). No. of bitstreams: 1 330228.pdf: 1707908 bytes, checksum: e9e7656943afa359919bcdb455b78423 (MD5) Previous issue date: 2014
Sistemas de controle via rede (NCS, do inglês Networked Control Systems) são uma classe especial de sistemas amostrados digitalmente, nos quais os dispositivos do sistema de controle se comunicam através de uma rede de comunicação (como mostrado na Fig. I). Significantes avanços tecnológicos tem levado a um maior interesse tanto na utilização de NCS em ambiente industrial (MOYNE; TILBURY, 2007), quanto em pesquisas relacionadas ao assunto (HESPANHA; NAGHSHTABRIZI; XU,2007; HEEMELS; WOUW, 2010; ZHANG; GAO; KAYNAK, 2013). Algumas das vantagens oferecidas por tais sistemas, com relação a sistemas de controle tradicionais, compreendem menor custo de implementação, flexibilidade e facilidade de manutenção. Apesar disso, inerentemente alguns efeitos indesejados também podem ocorrer, tais como atrasos na comunicação e intervalos de amostragem variantes, ocasionando degradação no desempenho do sistema em malha fechada. Devido a esses efeitos, a análise de estabilidade e também o projeto de controladores para NCS tornam-se mais desafiadores (TANG; YU, 2007). De modo geral, os estudos sobre NCS podem ser divididos em duas grandes áreas: controle da rede e controle via rede (GUPTA; CHOW, 2010). A primeira está mais interessada em proporcionar uma melhor qualidade no serviço de transmissão de dados realizado pela rede de comunicação, enquanto a segunda objetiva uma melhor qualidade do desempenho dos sistemas de controle sob determinadas condições induzidas pelos efeitos da utilização da rede. Embora tipicamente tratadas de forma separada, recentemente alguns esforços têm sido empreendidos de modo a integrar algumas características de ambas as áreas em fase de projeto, as chamadas estratégias de co-design (TORNGREN et al., 2006). Uma abordagem integrada é necessária de modo a se obter uma maior compreensão do funcionamento de um NCS, podendo assim obter um melhor desempenho geral do sistema. Neste contexto, especialmente levando em consideração que o uso rede de comunicação é limitado, tal recurso deve ser corretamente distribuído entre os sistemas de controle de modo a garantir um funcionamento adequado. Além disso, requisitos de desempenho individuais de cada planta também devem ser cumpridos, mesmo sujeitos a tais restrições de limites de recursos.

Abstract: Networked control system (NCS) is a special class of sampled-data system where control systems devices are interconnected through a communication network. Despite the advantages, such as lower cost, flexibility and easy of maintenance compared to a more traditional implementation, some undesired effects may be induced by the use of a shared medium in the feedback loop, for instance, time-varying sampling intervals and delays. Due to the multidisciplinary nature of an NCS, the analysis and design of such systems also demand a more comprehensive approach. Thus, the main objective of this thesis is to propose some strategies for the synthesis of dynamic output feedback compensators, assuming an industrial network control system environment with temporal behavior features and requirements. Throughout this document, the NCS is modeled considering unknown time-varying delays, which leads to an uncertain system representation, later overapproximated by a convex polytope with additional norm-bounded uncertainty. Based on parameter dependent Lyapunov functions, closed-loop stability conditions are provided, which can be verified in terms of feasibility of a set of linear matrix inequalities (LMIs). The control designs are then promptly derived from the stability conditions, leading to delay-dependent compensators. Furthermore, an integrated control design and resource management strategy is proposed, taking into account the controller design while also addressing the shared nature of the communication network. This co-design strategy assumes that a supervisor task has the knowledge of all devices that access the network, as well as their allocated bandwidths. Numerical examples and simulations are provided to illustrate the effectiveness of the proposed design methodologies.
APA, Harvard, Vancouver, ISO, and other styles
5

Lim, Hee Jin. "Facilitatory neural dynamics for predictive extrapolation." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1759.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Chen, Liang. "Design of decoupling control and time-delay compensation for a CFSTR." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29469.

Full text
Abstract:
This thesis is concerned with the design of a decoupling compensator and a time-delay compensator for a nonisothermal continuous flow stirred tank reactor (CFSTR). An expression for the analysis of interaction of the two-variable CFSTR was theoretically derived by using the relative gain method (RGM). For the purpose of improving the stability of the decoupling control system, undercompensation for a decoupled CFSTR system was suggested and the robustness test of such undercompensation decoupler to the modelling error was studied. On the other hand, the proposed time-delay compensation method, unlike conventional Smith's scheme, can rely on the basic property of gain-invariant time-delay. The stability of this time-delay compensation method is not affected by the CFSTR control system time-variant time-delay, while its compensation structure has the same features as the Smith compensator. The design of a decoupler and that of a time-delay compensator are independent of each other. All compensation structures are physically realizable. The theoretical results are supported by simulation. Simulation results for a CFSTR demonstrate that the undercompensation decoupling control can tolerate a relatively wide modelling error and reduce the sensitivity of the CFSTR process to parameter variations and unwanted disturbances. Also, simulation results show that the proposed time-delay compensator can provide an improvement over the conventional Smith compensator.
Applied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate
APA, Harvard, Vancouver, ISO, and other styles
7

Hoang, Trong bien. "Switched observers and input-delay compensation for anti-lock brake systems." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-00994114.

Full text
Abstract:
Many control algorithms for ABS systems have been proposed in the literature since the introduction of this equipment by Bosch in 1978. In general, one can divide these control algorithms into two different types: those based on a regulation logic with wheel acceleration thresholds that are used by most commercial ABS systems; and those based on wheel slip control that are preferred in the large majority of academic algorithms. Each approach has its pros and cons [Shida 2010]. Oversimplifying, one can say that the strength of the first ones is their robustness; while that of the latter ones their short braking distances (on dry grounds) and their absence of limit cycles. At the midpoint of this industry/academy dichotomy, based on the concept of extended braking stiffness (XBS), a quite different class of ABS control strategies has been proposed by several researchers (see, e.g., [Sugai 1999] and [Ono 2003]). This concept combines the advantages from both the industrial and academic approaches. Nevertheless, since the slope of the tyre characteristic is not directly measurable, it introduces the question of real-time XBS estimation. The first part of this thesis is devoted to the study of this estimation problem and to a generalization of the proposed technique to a larger class of systems. From the technological point of view, the design of ABS control systems is highly dependent on the ABS system characteristics and actuator performance. Current ABS control algorithms on passenger cars, for instance the Bosch ABS algorithm, are based on heuristics that are deeply associated to the hydraulic nature of the actuator. An interesting observation is that they seem to work properly only in the presence of a specific delay coming from the hydraulic actuation [Gerard 2012]. For brake systems that have different delays compared to those of hydraulic actuators, like electric in-wheel motors (with a smaller delay) or pneumatic trailer brakes (with a bigger delay), they might be no longer suitable [Miller 2013]. Therefore, adapting standard ABS algorithms to other advanced actuators becomes an imperative goal in the automobile industry. This goal can be reached by the compensation of the delays induced by actuators. The second part of this thesis is focused on this issue, and to the generalization of the proposed technique to a particular class of nonlinear systems. Throughout this thesis, we employ two different linearization techniques: the linearization of the error dynamics in the construction of model-based observers [Krener 1983] and the linearization based on restricted state feedback [Brockett 1979]. The former is one of the simplest ways to build an observer for dynamical systems with output and to analyze its convergence. The main idea is to transform the original nonlinear system via a coordinate change to a special form that admits an observer with a linear error dynamics and thus the observer gains can be easily computed to ensure the observer convergence. The latter is a classical method to control nonlinear systems by converting them into a controllable linear state equation via the cancellation of their nonlinearities. It is worth mentioning that existing results for observer design by error linearization in the literature are only applied to the case of regular time scalings ([Guay 2002] and [Respondek 2004]). The thesis shows how to extend them to the case of singular time scalings. Besides, the thesis combines the classical state feedback linearization with a new method for the input delay compensation to resolve the output tracking problem for restricted feedback linearizable systems with input delays.
APA, Harvard, Vancouver, ISO, and other styles
8

Leonard, Theresa Ann. "Time delay compensation of distributed multiple microphones in recording : an experimental evaluation." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61154.

Full text
Abstract:
In the search for improved reproduction of a classical music performance, the technique of time delay compensation is shown to be a useful tool for balance in recording. This paper investigates the importance and validity of small time adjustments in recordings to compensate for variation in distance between spot microphones and a main stereo pair. Conventional recording techniques, psychoacoustic considerations and technological aspects of the use of delays are researched in order to determine their validity in timbral improvement.
Multiple microphone set-ups are used to record both large orchestral works and smaller-scale classical compositions where auxiliary microphones may be needed to ensure an optimum balance in the final mix. Small time delays are derived from calculations involving the distances between microphones, the speed of sound, and humidity and temperature readings from the hall. Proper synchronization of these delays is desirable to preserve phase coherence and combat comb-filter effects. Precise delay units are used to compile musical exerpts for listening tests.
The results reveal any change in sound quality and provide a basis for investigating both the positive and negative effects through objective study of the value of time delay compensation in the live recording reproduction of classical music performances.
APA, Harvard, Vancouver, ISO, and other styles
9

Moon, Seung Ryul. "Hybrid PWM Update Method for Time Delay Compensation in Current Control Loop." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/84929.

Full text
Abstract:
A novel hybrid pulse-width modulation (PWM) update method is proposed to eliminate the effect of the one-step control time delay Td one without losing the full duty cycle range. Without the Td one to cause linear phase shifts that limit the control bandwidth and affect closed-loop stability, a very high quality digital current control can be achieved, such as a high closed current loop bandwidth, strong robustness against disturbances, ability to reach a very high fundamental frequency compared to switching frequency, etc. In a conventional digital control implementation, a sampling period (Tsamp) is allocated for the execution of samplings and computations, and the update of PWM outputs is delayed until the beginning of the following sampling period. This delayed PWM update method is the cause of the Td one. Instead of the delayed PWM update, if the PWM outputs are updated immediately after algorithm computations, then the effect of the Td one can be eliminated; however, the computation time delay Td comp from the current sampling instant through algorithm computations to the PWM update instant causes a reduced duty cycle range. Each of these two conventional PWM update methods has some shortcomings. A hybrid PWM update method is proposed to circumvent the aforementioned shortcomings and to incorporate only the advantages. The proposed method improves the performance by updating the PWM outputs multiple times during a Tsamp, whereas the PWM outputs are updated only one time during a Tsamp in the conventional methods. In spite of the simplicity of the proposed method, the performance improvements in stability, robustness and response characteristics are significant. On the other hand, the proposed method can be easily applied to many PWM based digital controls because of its simplicity. Additional to the hybrid PWM update method, a hybrid control method is proposed to optimize the sequence of control operations. It maximizes the current loops' robustness and minimizes the delay from the sampling of outer control loops' variables, such as voltage and speed, to the duty cycle update instant. The minimum delay enables the maximization of the outer control loops' bandwidth. Additionally, a corrective neutral offset voltage injection method is proposed to correct small PWM output deviations that may occur with the hybrid PWM update method. Utilizing a three-phase voltage source inverter with a permanent magnet synchronous machine as the platform, a deadbeat current control and a high speed ac drive experiments have been conducted to demonstrate the feasibility and validity. Notable results include a closed current loop response of one Tsamp with the deadbeat control and a 500 Hz current fundamental frequency with 1 kHz switching frequency in the high speed ac drive.
Ph. D.
APA, Harvard, Vancouver, ISO, and other styles
10

Moctezuma, Andres. "CPM Equalization to Compensate for ISI due to Band Limiting Channels." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34559.

Full text
Abstract:
In modern wireless communication systems, such as satellite communications and wireless networks, the need for higher data rates without the need for additional transmit power has made Continuous Phase Modulation (CPM) one of the most attractive modulation schemes in band limited channels. However, as the data rates keep increasing, the spectral width of the CPM signal increases beyond the channel bandwidth and performance becomes constrained by the intersymbol interference (ISI) that results from band-limiting filters.

We propose two approaches to the problem of equalization of band-limited CPM signals. First, our efforts are focused on shortening the channel impulse response so that we can use a low complexity MLSE equalizer. We implement the channel truncation structure by Falconer and Magee and adapt it to work with CPM signals. This structure uses a, a more derivable, pre-filter to shape the overall response of the channel, so that its impulse response is of shorter duration. Simulation results show that near-MLSE performance can be obtained while dramatically reducing MLSE equalizer complexity.

In our second approach, we focus on eliminating the group-delay variations inside the channel passband using an FIR pre-filter. We assume the channel to be time-invariant and provide a method to design an FIR filter so that -when convolved with the band limiting filter - it results in more constant group-delay over the filter passband. Results show that eliminating the group-delay variations in the band limiting filter passband reduce the amount of ISI and improve bit error rate performance.
Master of Science

APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Delay compensator"

1

McFarland, Richard E. CGI delay compensation. Moffett Field, Calif: Ames Research Center, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

service), SpringerLink (Online, ed. Delay compensation for nonlinear, adaptive, and PDE systems. Boston, Mass: Birkhäuser, 2009.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Krstic, Miroslav. Delay Compensation for Nonlinear, Adaptive, and PDE Systems. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Majlessi, Fazel. Fuzzy control using model estimation to compensate for time delay. Manchester: University of Manchester, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

European Court of Human Rights. Affaire Scopelliti c. Italie : arrêt du 23 Novembre 1993 =: Case of Scopelliti v. Italy : judgment of 23 November 1993. Strasbourg: Greffe de la Cour, Conseil de l'Europe, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Gallagher, Julia. Robbing the victims: No excuse for delay : a TUC legal services report on benefit recovery from injury compensation cases. London: Trades Union Congress, Organisation and Services Department, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

European Court of Human Rights. Affaires A- Scuderi c. Italie, arrêt du 24 Août 1993.: B- Massa c. Italie, arrêt du 24 Août 1993. C- Istituto di Vigilanza c. Italie, arrêt du 22 Septembre 1993. D- Figus Milone c. Italie, arrêt du 22 Septembre,1993. E- Goisis c. Italie, arrêt du 22 Septembre 1993 = Cases of A- Scuderi v. Italy, judgment of 24 August 1993. B- Massa v. Italy, judgment of 24 August 1993. C- Istituto di Vigilanza v. Italy, judgment of 22 September 1993. D- Figus Milone v. Italy, judgment of 22 September 1993. E- Goisis v. Italy, judgment of 22 September 1993. Strasbourg: Greffe de la Cour, Conseil de l'Europe, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Standards, United States Congress House Committee on Education and Labor Subcommittee on Labor. Investigation of the backlog in black lung cases: Hearings before the Subcommittee on Labor Standards of the Committee on Education and Labor, House of Representatives, Ninety-ninth Congress, first session, hearings held in Uniontown, PA, May 3; Wise, VA, June 7; Washington, DC, July 11; and Wilkes-Barre, PA, September 9, 1985. Washington: U.S. G.P.O., 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Subcommittee, United States Congress House Committee on Government Operations Employment and Housing. Delays in processing and adjudicating black lung claims: Hearing before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-ninth Congress, first session, June 24, 1985. Washington: U.S. G.P.O., 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

United States. Congress. House. Committee on Government Operations. Manpower and Housing Subcommittee. Problem of delays in processing Federal Employees' Compensation Act (FECA) claims at the Boston District Office of Workers' Compensation Programs: Hearing before a subcommittee of the Committee on Government Operations, House of Representatives, Ninety-eighth Congress, second session, October 12, 1984. Washington: U.S. G.P.O., 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Delay compensator"

1

Benjeddi, Oumayma, M. Chaturvedi, P. K. Juneja, G. Yadav, V. Joshi, and R. Mishra. "Design of Delay Compensator for a Selected Process Model." In Lecture Notes in Mechanical Engineering, 947–52. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8542-5_83.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Chaturvedi, Mayank, Prateeksha Chauhaan, and Pradeep K. Juneja. "Design of Time-Delay Compensator for a FOPDT Process Model." In Lecture Notes in Electrical Engineering, 205–11. New Delhi: Springer India, 2016. http://dx.doi.org/10.1007/978-81-322-3589-7_22.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Juneja, P. K., P. Saini, A. Dixit, N. Varshney, and S. K. Sunori. "Time-Delay Compensator Design and Its Applications in Process Control—A Review." In IOT with Smart Systems, 503–8. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3575-6_50.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Sabet, Saeed Shafiee. "Delay Compensation Technique." In T-Labs Series in Telecommunication Services, 91–118. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99869-1_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Krstic, Miroslav. "Time-Varying Delay." In Delay Compensation for Nonlinear, Adaptive, and PDE Systems, 85–103. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Krstic, Miroslav. "Robustness to Delay Mismatch." In Delay Compensation for Nonlinear, Adaptive, and PDE Systems, 65–83. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Krstic, Miroslav. "Antistable Wave PDE with Input Delay." In Delay Compensation for Nonlinear, Adaptive, and PDE Systems, 357–84. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0_19.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Krstic, Miroslav. "Delay-Adaptive Full-State Predictor Feedback." In Delay Compensation for Nonlinear, Adaptive, and PDE Systems, 107–19. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Zhang, Jinhui, Yuanqing Xia, Zhongqi Sun, and Duanduan Chen. "Output-Feedback Networked Delay Compensation Control for CPSs with Random Delay." In Networked and Event-Triggered Control Approaches in Cyber-Physical Systems, 51–66. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003260882-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Krstic, Miroslav. "Introduction." In Delay Compensation for Nonlinear, Adaptive, and PDE Systems, 1–13. Boston: Birkhäuser Boston, 2009. http://dx.doi.org/10.1007/978-0-8176-4877-0_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Delay compensator"

1

Erol, H. Ersin, and Altug Iftar. "Time-delay compensator design." In 2017 11th Asian Control Conference (ASCC). IEEE, 2017. http://dx.doi.org/10.1109/ascc.2017.8287557.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Erol, H. Ersin, and Altug Iftar. "Decentralized Time-Delay Compensator Design." In 2018 6th International Conference on Control Engineering & Information Technology (CEIT). IEEE, 2018. http://dx.doi.org/10.1109/ceit.2018.8751844.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kim, Daehyeon, Youngjin Kim, Jimin Park, Hyeongrae Kim, Juyeon Kim, and Dongho Oh. "Individual Drive Cross-Coupled Control System to Compensate for Measurement Error for Roll-to-Roll Contact Pressure Uniformization." In ASME 2021 30th Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/isps2021-64689.

Full text
Abstract:
Abstract Commercialization of printed electronics products requires uniform line width and thickness of the print pattern, which can be accomplished only by uniformization of the contact pressure in the roll-to-roll processs [1]. The conventional contact pressure control system has limitations in compensation, because the indirect measurement of the contact pressure performed by using the load cell generates time-delay error and magnitude error. In this study, a transfer function between the load cell signals and the actual contact pressure is derived to calculate the measurement time-delay, and the error was compensated by using a time-delay predictor. In addition, individual drive cross-coupled control system with time-delay compensator is designed in consideration of the effect that two servo motors have on the pressure on the other side of the impression roll to perform contact pressure uniformization.
APA, Harvard, Vancouver, ISO, and other styles
4

Salaani, M. Kamel, Gary J. Heydinger, Paul A. Grygier, and W. Riley Garrott. "Transport Delay Compensation for the Image Generator Used in the National Advanced Driving Simulator." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-42975.

Full text
Abstract:
Despite the advances in computer graphics speed and quality, Image Generator (IG) delys are unavoidable due to the demanding details and complex scenarios run at the National Advanced Driving Simulator (NADS), in particular for urban traffic scenes. This paper introduces a new dynamic compensation algorithm for automotive driving simulator visual displays. The compensation method is based on an original approach used by NASA Ames Research Center for flight simulator applications. The compensator designed has nearly zero phase with well-maintained magnitued within the bandwidth. The algorithm has magnitude attenuation outside the bandwidth without altering the desired frequency response of the compensator. This paper discusses the compensation method, and presents results from the NADS showing drivers’ ability to steer the vehicle through corners without excessive overshoot resulting from human reactions to visual delays. The results demonstrate that compensating for visual delays for high-end driving simulators is vital for real-time fidelity.
APA, Harvard, Vancouver, ISO, and other styles
5

Chung, Jae H., Norman P. Coleman, and Yushing Cheung. "Semi-Autonomous Control of a Multi-Arm Telemanipulator With Adaptive Impedance." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11950.

Full text
Abstract:
This paper addresses problems to achieve transparency and contact stability for Single Master Multi-Slave telemanipulation that consists of unconstrained and constrained motions. The adaptive bilateral control with a local force compensator is developed based on adaptive impedance control and contact force driven compensation with auto-switching functions. With a limited amount of knowledge about robotic and environment dynamics and a time-varying communication delay, the developed method guarantees good adaptive tracking performance in unconstrained motion and reduction of oscillating contacts to keep a balance of the system in constrained motion. Based on an actual haptic device and virtual robots, haptic simulations are presented to demonstrate adaptive transparency and contact stability in the presence of communication delays.
APA, Harvard, Vancouver, ISO, and other styles
6

Raja, G. Lloyds, and Ahmad Ali. "Enhanced delay compensator based parallel cascade control scheme." In 2016 6th IEEE International Conference on Control System, Computing and Engineering (ICCSCE). IEEE, 2016. http://dx.doi.org/10.1109/iccsce.2016.7893577.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Yashiro, Daisuke, Dapeng Tian, and Kouhei Ohnishi. "Central controller based hybrid control with communication delay compensator." In IECON 2010 - 36th Annual Conference of IEEE Industrial Electronics. IEEE, 2010. http://dx.doi.org/10.1109/iecon.2010.5674974.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Fisher, M., R. C. Boysen, D. F. Buscher, C. A. Haniff, E. B. Seneta, X. Sun, D. M. A. Wilson, and J. S. Young. "Design of the MROI delay line optical path compensator." In SPIE Astronomical Telescopes + Instrumentation. SPIE, 2010. http://dx.doi.org/10.1117/12.857168.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Antunes, Ana, Fernando Morgado Dias, Jose Antonio Vieira, and Alexandre Mota. "A neuro-fuzzy delay compensator for distributed control systems." In Factory Automation (ETFA 2008). IEEE, 2008. http://dx.doi.org/10.1109/etfa.2008.4638531.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Antunes, Ana, Fernando Morgado Dias, and Alexandre Mota. "A neural network delay compensator for networked control systems." In Factory Automation (ETFA 2008). IEEE, 2008. http://dx.doi.org/10.1109/etfa.2008.4638564.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Delay compensator' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography