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Industrial Electronics, IEEE Transactions on

Issue 5 • Date Oct 1990

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Displaying Results 1 - 13 of 13
  • Designing intelligent muscle into industrial motion control

    Publication Year: 1990 , Page(s): 329 - 341
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1212 KB)  

    Following a brief discussion of the underlying PIC (power integrated circuit) semiconductor technology, a tutorial review of PIC applications in a broad spectrum of stepper, DC, brushless DC, and AC motor drive configurations is presented. PIC designs used in motor drives covering a range of power ratings from <100 W to >10 kW are surveyed. Strengths and limitations of present PIC technology are discussed, revealing likely directions for future PIC developments and their potential impact on tomorrow's motion control systems View full abstract»

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  • Microprocessor-based on-line monitoring and characterization of power factor of a synchronous motor

    Publication Year: 1990 , Page(s): 398 - 401
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (276 KB)  

    An attempt is made to develop a microprocessor-based system for online monitoring of the power factor of a synchronous motor. The method is based purely on software design with the use of two resistors (of small ohmic values and high current carrying capacity) connected in series with the field circuit and load circuit, which generate the reference signals for the microprocessor. However, for mechanical loading, the resistance in the load circuit may be replaced by a torque transducer. The interesting feature of the system is its capability to characterize the status (i.e. leading, lagging, or unity) of the power factor. The system is helpful in providing necessary information for power factor corrections leading to the best utilization of the synchronous motor View full abstract»

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  • A high-frequency forward DC/DC converter topology with transformer flux balancing capability

    Publication Year: 1990 , Page(s): 409 - 418
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (556 KB)  

    The analysis and design of a high-frequency forward DC/DC power converter topology with transformer flux balancing capability is presented. The converter utilizes a main switch for load current commutation and an auxiliary switch for transformer flux balancing. Moreover, the converter topology provides the means to recover the energy associated with the parasitic inductances of the circuit components, thus yielding high efficiency and allowing for high operating frequencies. Experimental results for a 1 kW, 20 kHz prototype unit are presented View full abstract»

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  • An adaptive hysteresis-band current control technique of a voltage-fed PWM inverter for machine drive system

    Publication Year: 1990 , Page(s): 402 - 408
    Cited by:  Papers (192)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (484 KB)  

    An adaptive hysteresis-band control method where the band is modulated with the system parameters to maintain the modulation frequency to be nearly constant is described. Although the technique is applicable to general AC motor drives and other types of load, an interior permanent magnet (IPM) synchronous machine load is considered. Systematic analytical expressions of the hysteresis band are derived as functions of system parameters. An IPM machine drive system with a voltage-fed current-controlled PWM (pulse width modulation) inverter has been computer simulated to study the performance of the proposed method View full abstract»

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  • Minimum delay PID control of interpolated joint trajectories of robot manipulators

    Publication Year: 1990 , Page(s): 358 - 364
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    The digital implementation of an optimal PID (proportional integral derivative) controller of linearly interpolated joint trajectories is presented. The controller obtains optimal performance by reformulating the PID control law to minimize the time delay between the position transducer reading and the application of the corrective torque. Compared with the PID controller that is computed in a straightforward fashion, this formulation reduces the time delay by a factor of three. The superior performance of the proposed minimum-delay PID (MD PID) is demonstrated by experiments on a robot manipulator. Other practical issues associated with a digital PID control of joint trajectories of a robot manipulator, such as integer overflow and compensation for dynamics and joint-friction, are discussed View full abstract»

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  • The optimal control of a constrained drive system with brushless DC motor

    Publication Year: 1990 , Page(s): 342 - 348
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (384 KB)  

    The optimal (according to the quadratic performance index) control method of a drive position system with an electronically commutated brushless DC motor is discussed. Initially developed for linear, unconstrained, and undistributed systems, this optimal control method is now applied to a system having constrained state and input variables (e.g. armature voltage, armature current, rotor speed) and unknown disturbances (e.g. load torque). The method uses an undisturbed and unconstrained model for a model-following adaptive control of the real system. The control method is verified through computer simulation using the data from a real drive position system. Results show that the controlled system operates effectively at the limiting state variables, which represent the real system. In addition, the final position is reached without overshoots View full abstract»

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  • A shortest data window algorithm for detecting the peak value of sinusoidal signals

    Publication Year: 1990 , Page(s): 424 - 425
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (148 KB)  

    A digital algorithm for detecting the peak value of known-frequency sinusoidal signals is proposed. The algorithm detects the peak value of a sinusoidal signal exactly and uses only two successive sampled data points for each peak value calculation. Hence, its transient response is only a sampling period. Simulation results show that this algorithm is applicable to detecting the peak value of steady-state, varying, and decaying sinusoidal signals used in power system telecontrol. Therefore, this technique is very useful for digital systems in which the peak value of sinusoidal signals must be detected View full abstract»

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  • A vision system for an automatic assembly machine of electronic components

    Publication Year: 1990 , Page(s): 349 - 357
    Cited by:  Papers (5)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (692 KB)  

    A vision system for the automatic assembly of electronic components is developed. The vision system presents information about positions, orientations, and quality of rectangular-shaped electronic components in real time. The orientation is detected by the windowed Hough transform along with a simple edge-detection method, whereas the position of each component is determined by using the projection method with dynamic thresholding. In addition, real-time implementation of the vision system in which multiple central processors are used for parallel processing of the algorithms is described View full abstract»

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  • A new modeling and simulation CAD package for power converter design

    Publication Year: 1990 , Page(s): 387 - 397
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (800 KB)  

    The PECADS software CAD package is a powerful PC-based tool, used in the study and design of power electronics, in which a new real structure simulation concept has been developed. The system has the capability for steady-state simulation, which allows topology election, FFT analysis, etc., and for slow down real-time simulation, which allows system identification, digital regulator synthesis, and closed-loop system simulation. The full PECADS package also includes power semiconductors, protection sizing (using the magnitudes simulation capability), and a dedicated expert system that generates the most adequate switching pattern sequence for every application. The total system is fully open to expansion or improvement View full abstract»

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  • Study of solar cell fabrication using an electrostatic thick-film printing method

    Publication Year: 1990 , Page(s): 419 - 423
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (404 KB)  

    A novel thick-film circuit printing technique which is based on the electrostatic principle known as noncontact electrostatic thick-film printing was developed for the metallization of edge-defined film-fed growth (EFG) solar cells. The conventional thick-film solar cell inks were modified by adding 10-20% terpineol solvent. The effects of ink viscosity, applied voltages, nozzle diameter, and nozzle-to-substrate distance on line definition and ink-flow rate were investigated. A simple theoretical model was derived for the electrostatic ink ejection. The minimum line width obtained was 3 mm. Multilayer printing was able to be used to raise the line film thickness. The maximum line width obtained was about 20-30 mm for a single run. The system is now completely computercontrolled and capable of printing films onto solar cell substrates reliably, with a high degree of accuracy. Multiple-layer prints can be made with food layer-to-layer registration View full abstract»

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  • Incremental fuzzy expert PID control

    Publication Year: 1990 , Page(s): 365 - 371
    Cited by:  Papers (91)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    An approach to intelligent PID (proportional integral derivative) control of industrial systems which is based on the application of fuzzy logic is presented. This approach assumes that one has available nominal controller parameter settings through some classical tuning technique (Ziegler-Nichols, Kalman, etc.). By using an appropriate fuzzy matrix (similar to Macvicar-Whelan matrix), it is possible to determine small changes on these values during the system operation, and these lead to improved performance of the transient and steady behavior of the closed-loop system. This is achieved at the expense of some small extra computational effort, which can be very easily undertaken by a microprocessor. Several experimental results illustrate the improvements achieved View full abstract»

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  • Analysis of control characteristics using fuel cell plant simulator

    Publication Year: 1990 , Page(s): 378 - 386
    Cited by:  Papers (15)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (692 KB)  

    To estimate the operational characteristics of duel cell power plants, the authors developed a dynamic simulator and analyzed the operating characteristics. In the simulations, attention is given to the pressure difference between the cathode and anode of the fuel cell and the system base pressure. The former is important for safe operation of the fuel cell and the latter is important for safe operation of the reformer. For load following and shut-down modes of the 1 MW plant studied, calculation results were compared with actual test results and agree fairly well View full abstract»

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  • A DSP-based adaptive controller for a smooth positioning system

    Publication Year: 1990 , Page(s): 372 - 377
    Cited by:  Papers (10)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    The implementation of a self-tuning regulator for the positioning of a direct-drive servomotor is described. The servo motor is a permanent magnet DC motor in which no speed reducer is used. The auto-tuning regulator consists of two major loops. The inner loop contains a feedback (PD or PID) regulator with additional feedforward terms. The parameters of the feedforward compensation are adjusted by the outer loop, which contains an online parameter estimator. The estimator is based on a recursive least-squares equation, and the estimated parameters are the load inertia and viscous friction. This self-tuning regulator has been simulated with PC.MATLAB, and the results demonstrate the high performance of the scheme. Experimental results obtained with a small DC motor (Electrocraft E-576) are presented, and these results show good agreement with the digital simulation results. There are two innovative aspects to this work. First, parameter estimation is used to adapt the feedforward compensation terms instead of the gains of the feedback controller, as usually is the case in conventional indirect self-tuning regulators. Secondly, the complete adaptive controller has been implemented using a single-chip digital signal processor (DSP), which results in the reduction of system hardware and cost View full abstract»

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Aims & Scope

IEEE Transactions on Industrial Electronics encompasses the applications of electronics, controls and communications, instrumentation and computational intelligence for the enhancement of industrial and manufacturing systems and processes.

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Meet Our Editors

Editor-in-Chief
Carlo Cecati
DISIM - Univ. degli Studi dell'Aquila
67100 Aquila, Italy
c.cecati@ieee.org
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