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Article
Publication date: 17 October 2008

Tomasz Rogalski

The purpose of this paper is to present the generic conception of the aircraft control system with the voice command interpretation interface. The paper's intention is…

Abstract

Purpose

The purpose of this paper is to present the generic conception of the aircraft control system with the voice command interpretation interface. The paper's intention is also to present the first steps of work under control system for general aviation aircraft, which assists pilots using speech interpretation module.

Design/methodology/approach

The paper defines the main rules governing projecting and operating such systems, and defines and discusses the main functionality levels. The use of voice commands for the direct controlling of the flight of the plane is also presented and analyzed in detail.

Findings

The paper presents general rules, which could be applied for work under control systems with speech interpretation modules intended for general aviation aircraft.

Practical implications

The analyses and opinions included in this paper can be generic basis for future projects, which will try to use pilot's voice command to control the general aviation airplane.

Originality/value

This paper presets some conception of the control system with the speech recognition interface. There are main rules generally defining both the structure and the functionality the of such aircraft control system, included in this paper.

Details

Aircraft Engineering and Aerospace Technology, vol. 80 no. 6
Type: Research Article
ISSN: 0002-2667

Keywords

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Article
Publication date: 24 August 2012

Karine Bauer and Luciano Mendes

Weblabs are an additional resource in the execution of experiments in control engineering education, making learning process more flexible both in time, by allowing extra…

Abstract

Purpose

Weblabs are an additional resource in the execution of experiments in control engineering education, making learning process more flexible both in time, by allowing extra class laboratory activities, and space, bringing the learning experience to remote locations where experimentation facilities would not be available. The purpose of this paper is to investigate and report on a weblab project where the speed of a DC motor is controlled in closed loop, being the control system parameters set by the remote user (student).

Design/methodology/approach

The engine control experiments are run and on‐line transmitted by videoconference over the internet, from a didactical plant physically located at the Systems and Automation Laboratory of the Control and Automation Engineering department of the Pontifical Catholic University of Parana. The system response (transient motor speed) to the user's choice of parameters is evaluated through performance indices (IAE, ITAE), which are used to qualify the ability of the student to tune PID and RTS control algorithms. There is an option to run experiments in open loop, so the student can perform preliminary analysis to identify the system dynamic model and then apply mathematical models and computational methods, learned in theoretical classes, to define best performance control parameters. A simulation function was implemented, to further help the student in the problem solution. Virtual instrumentation resources were used to implement the Weblab, using the DC motor of a laboratory didactical plant. A local server runs a LabVIEWTM application, which can be remotely accessed in the client side through a web browser, where the system front panel is reproduced. This remote interface is directly originated at the LabVIEWTM application, through an embedded web server. At the user request, the control of the remote system is granted. The user interface is cognitive, with motor speed, control signal, set point and all the pertinent information displayed in evolving charts and indicators. Microsoft™ Skype is used to establish a videoconference with the laboratory where the plant is located. Results of the user experiments are stored in local files, which can be e‐mailed to the user at his command by the end of the session.

Findings

Used as a platform in weblab projects, LabVIEW combined with Skype provides a suitable solution for the necessary software/hardware integration for communications with data acquisition systems and advanced connectivity resources. In virtual instrumentation Skype has proved to be efficient in establishing the right environment without the need for developing complex software for teaching practical control engineering concepts.

Research limitations/implications

The level of performance (speed of acquisition, accuracy and number of parameters that could be evaluated) of the current system would need to be evaluated compared to some existing systems. The implication is the changes brought to the adopted approach to the development of, access to and the overall cost of producing virtual laboratory systems used for science, engineering and technology education.

Practical implications

With further effort, the current and similar systems could be further upgraded with user login control and server, so that results can be submitted to the tutor, thus acting as a learning evaluation instrument.

Originality/value

The originality of this research lies in the innovative integration of technology in education, which involves the implementation of a carefully designed, cost‐effective virtual laboratory for teaching and learning of concepts in control engineering.

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Article
Publication date: 28 February 2020

Lianyu Wang

Intelligent lighting control system can control lights to go off when people leave, which has been widely concerned by researchers.

Abstract

Purpose

Intelligent lighting control system can control lights to go off when people leave, which has been widely concerned by researchers.

Design/methodology/approach

In this study, an intelligent lighting control system based on wireless sensor network was designed. First, the hardware and software designs of the system were described briefly. Then, the lighting control algorithm was analyzed emphatically. Considering the illumination and uniformity of light, an intelligent lighting control algorithm based on gradient descent was designed.

Findings

In the system test, it was found that the system had a good through-wall communication function, and the communication distance could fully meet the system requirements and run normally. In the test of the lighting control algorithm, it was found that the user’s satisfaction on uniformity in different scenarios was close to 1, and the satisfaction on illumination could also meet the user’s needs, which verified the reliability of the lighting control algorithm.

Originality/value

This study provides some theoretical supports for the better application of wireless sensor network in intelligent light control system, which is conducive to the further development of light control system.

Details

Journal of Engineering, Design and Technology , vol. 18 no. 5
Type: Research Article
ISSN: 1726-0531

Keywords

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Article
Publication date: 1 February 2001

Elbrous M. Jafarov and Ramazan Tasaltin

The guided missile system is considered as SISO plant with parameter perturbations. The structure of the missile system is not suitable for the use of classical linear…

Abstract

The guided missile system is considered as SISO plant with parameter perturbations. The structure of the missile system is not suitable for the use of classical linear controllers. On the other hand, the missile system should be capable of good performances, such as zero steady state error, less settling time etc. Standard VSC control laws fail to control the steady state error due to the structure of the system matrices. For this reason we have proposed two new robust output integral sliding mode controllers and design procedures. An integrator is included in the sliding function, which results in the reduction and removal of the output error. The total control consists of two parts: equivalent control which compensates the nominal regime of the missile system; and VSC which compensates the parameter perturbations (changes in Mach number, altitude and mass of the vehicle, etc.) of the missile system. We have derived new constructive sliding and stability conditions for both cases by using Lyapunov’s direct method. Computer simulations indicate that this approach yields a satisfactory control performance.

Details

Aircraft Engineering and Aerospace Technology, vol. 73 no. 1
Type: Research Article
ISSN: 0002-2667

Keywords

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Article
Publication date: 10 August 2020

Haiyan Qiao, Hao Meng, Wei Ke, Quanxi Gao and Shaobo Wang

To improve the robustness of missile control system and reduce the error, a missile attitude adaptive control method based on active disturbance rejection control

Abstract

Purpose

To improve the robustness of missile control system and reduce the error, a missile attitude adaptive control method based on active disturbance rejection control technology (ADRC) and BP neural network is innovatively proposed.

Design/methodology/approach

ADRC improves the performance of the missile control system by estimating and eliminating the total disturbance of the system. BP neural network adjusts the parameters of ADRC controller according to the state of the system to realize adaptive control. Based on the control system and missile dynamics model, the convergence analysis of the extended state observer and the stability analysis of the closed-loop system after embedding BP neural network are given.

Findings

The simulation results show that the adaptive control method can adjust the coefficient of error feedback rate according to the system input, output and error change rate, which accelerates the response speed of missile attitude angle and reduces the attitude angle error.

Practical implications

BP–ADRC further improves the robustness and environmental adaptability of the missile control system. The BP–ADRC control method proposed in this paper is proved feasible.

Originality/value

Different from the traditional ADRC, the BP–ADRC feedback signal proposed in this paper uses the output signal and its rate of the closed-loop system instead of the system state quantity estimated by extended state observer (ESO). This innovative method combined with BP neural network can make the system output meet the requirements when ESO has errors in the estimation of missile dynamics model.

Details

Aircraft Engineering and Aerospace Technology, vol. 92 no. 10
Type: Research Article
ISSN: 1748-8842

Keywords

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Article
Publication date: 1 July 1990

L. Brennan, F. Finnan and M.E.J. O'Kelly

The requirements for two smaller companies in integratedmanufacturing are addressed, in particular, the area of manufacturingcontrol. The functional areas pertaining to…

Abstract

The requirements for two smaller companies in integrated manufacturing are addressed, in particular, the area of manufacturing control. The functional areas pertaining to manufacturing control in both companies are reviewed. On the basis of these reviews and management objectives, their requirements are specified. Recommendations are then made in respect of both companies on how to meet these requirements having regard to the nature of the manufacturing control systems available.

Details

International Journal of Operations & Production Management, vol. 10 no. 7
Type: Research Article
ISSN: 0144-3577

Keywords

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Article
Publication date: 1 October 1998

Fritz H. Grupe, James M. Hensley and Jeanne H. Yamamura

Computer security is maintained in many ways. New systems are developed with an eye towards protecting against known techniques for bypassing system controls. New methods…

Abstract

Computer security is maintained in many ways. New systems are developed with an eye towards protecting against known techniques for bypassing system controls. New methods of fraud, especially in point of sale systems, appear in spite of these protections. Consequently, there is a continuing need to examine how systems are used in practice and to implement new controls to prevent the incidence and recurrence of fraud. This paper cites examples of new frauds, suggests general techniques for protecting against the original appearance and recurrence of such frauds, and proposes that the maintenance of computer systems include continuing attention to these controls.

Details

Information Management & Computer Security, vol. 6 no. 4
Type: Research Article
ISSN: 0968-5227

Keywords

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Article
Publication date: 1 March 1983

Last month we described the wide range of microprocessor‐controlled energy management systems. In most cases these will also monitor fire detection and extinction systems

Abstract

Last month we described the wide range of microprocessor‐controlled energy management systems. In most cases these will also monitor fire detection and extinction systems, and intruder and access‐control aspects of security, and will control other features of building management such as maintenance scheduling and lift functioning. This month we look at these further possibilities for automation.

Details

Facilities, vol. 1 no. 3
Type: Research Article
ISSN: 0263-2772

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Article
Publication date: 1 January 2013

Piotr Kołodziejek

The aim of this paper is to undertake analysis and comparison of the closed‐loop and sensorless control systems sensitivity to the broken rotor for diagnostic purposes…

Abstract

Purpose

The aim of this paper is to undertake analysis and comparison of the closed‐loop and sensorless control systems sensitivity to the broken rotor for diagnostic purposes. For the same vector control system induction motor drive analysis concerning operation with the asymmetric motor, broken rotor fault handling and operation were investigated. Reliability, range of stable operation, fault symptoms and application of diagnosis methods based on control system variables utilization was analyzed.

Design/methodology/approach

Induction motor drive vector control system synthesis was applied using the multiscalar variables of the machine model with nonlinear feedback linearization applied to use classical cascaded PI controllers for the speed‐torque and flux decoupled control. Speed observer was applied for the rotor flux and rotor speed estimation for the sensorless control system synthesis.

Findings

Relative sensitivity of the state and control system variables to broken rotor fault based on experimental results for the closed‐loop and sensorless control systems is presented and compared. Drawbacks of using the MCSA analysis for the rotor fault diagnosis in the closed‐loop and sensorless control systems are pointed. Advantages and drawbacks of the state space estimators filtering characteristics in the sensorless control system are described.

Practical implications

Asymmetric IM motor drive handling and diagnosis. Broken rotor range diagnosis inconsistency using the popular MCSA method should be considered in the closed‐loop and sensorless control system of the induction motor drive. Depending on the IM motor drive application and the operation requirements the results can be used for asymmetric machine proper handling, choosing proper control system structure and control system variables for rotor fault early diagnosis.

Originality/value

Sensitivity of the state and control system variables to broken rotor fault based on experimental results for the closed‐loop and sensorless control systems is presented, which implies motor handling procedures and fault diagnosis.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 32 no. 1
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 1 October 1999

Eli Noy

The article describes a new approach to the cost/benefit aspect of management control systems which will help managers decide which control system is worthwhile improving…

Abstract

The article describes a new approach to the cost/benefit aspect of management control systems which will help managers decide which control system is worthwhile improving and how. The new concept is based on two ideas: defining the purpose of a control system as: “Triggering corrective action that will prevent losses which came out of deviation from planned path”; and breaking up the control cycle into five steps and relating separately to each step for improving the present system and its cost/benefit performance.

Details

Managerial Auditing Journal, vol. 14 no. 7
Type: Research Article
ISSN: 0268-6902

Keywords

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