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Industrial Electronics, IEEE Transactions on

Issue 3 • Date Aug 1989

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Displaying Results 1 - 18 of 18
  • General hybrid orthogonal functions-a new tool for the analysis of power electronic systems

    Page(s): 413 - 424
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (632 KB)  

    A set of general hybrid orthogonal functions (GHOFs) is introduced to meet the needs of any problem of spectral analysis. The completeness of the set of GHOFs is established, and its flexibility and use for efficient representation of signals in typical practical problems is discussed. The GHOF spectral analysis of linear time-invariant dynamical systems in state space is presented. The technique is applied to two illustrative silicon-controlled-rectifier-controlled DC motor drive simulations, which clearly demonstrates the power of the GHOF in simulating such systems. Some aspects of programming necessary for the related software development are presented View full abstract»

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  • Class-E DC/DC converters with a capacitive impedance inverter

    Page(s): 425 - 433
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    Analysis and design rules are presented for three class-E switching-mode DC/DC power converters, each with a capacitive impedance inverter. Experimental results are given for one of the converters. A zero-voltage switching technique is achieved for both class-E inverters and rectifiers. Therefore, the efficiency of the converters is very high at switching frequencies in the megahertz range. By applying a capacitive impedance inverter, lossless operation of the class-E inverter can be obtained for a wide range of converter load resistance, from full load to infinity. Experimental results are in excellent agreement with the theoretical calculations. Only a 12% relative bandwidth of the switching frequency is required to maintain a constant DC output voltage for the load resistance from full load to infinity at about 1 MHz with 15-W output View full abstract»

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  • Implementation of VSS control to robotic manipulators-smoothing modification

    Page(s): 321 - 329
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (552 KB)  

    The authors focus on the implementation of a variable structure systems (VSS) controller with smoothing laws in the design of effective tracking control for multi-input, multi-output robotic arms. The controller is realized by selecting powerful smoothing methods, such as balance conditions or their simplification, to reduce or remove undesirable chattering while keeping the robust characteristic that rejects system uncertainties. Giving careful consideration to actual system constraints, a design principle for selecting different smoothing methods is obtained and confirmed by experimental results View full abstract»

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  • Direct adaptive control of nonminimum phase systems using integral action

    Page(s): 361 - 364
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (252 KB)  

    A direct adaptive control scheme is proposed for nonminimum-phase systems in which controller parameters are estimated from the recursive least-squares algorithm and additional auxiliary parameters are obtained from the proposed polynomial identity. A local convergence is guaranteed without any extra condition. Integral action is incorporated into the adaptive controller to eliminate the steady-state error and to satisfy a condition of the unique solution for the polynomial identity. The control law used in this scheme is based on the set-point-on-I-only proportional-integral-derivative (PID) structure View full abstract»

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  • Discrete-time frequency-shaping parametric LQ control with application to active seat suspension control

    Page(s): 383 - 390
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    The theory of a discrete-time parametric linear quadratic (PLQ) control is extended to a class of frequency-shaped performance measures. The incorporation of frequency-dependent weighting matrices allows the emphasis or de-emphasis of the importance of the system variables being penalized over specific bands of frequencies. Results are presented for constant-gain and dynamic output feedback configurations of frequency-shaping optimal control. The resultant control is applied to the design of active seat suspension control. The active suspension maximizes ride comfort by discriminatory minimization of average whole-body absorbed power over a band of frequencies that causes the most discomfort to a human being View full abstract»

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  • Digitally controlled optimal position servo of induction motors

    Page(s): 349 - 360
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (588 KB)  

    A high-performance optimal position servo is proposed for a microcomputer-controlled induction motor. The servo is designed and realized by top-down computer-aided design (CAD). A field-orientation-control approach is adopted to design an optimal voltage-controlled regulator for position control. A type of globally stable and parameter insensitive observer-linearizer is presented and utilized to overcome the restricted availability of sensed variables: winding voltages and currents, and shaft speed and angle. The digital scheme has been experimentally tested and verified. The effect of quantization errors and sampling period in analog/digital analog on the response and accuracy of the control system is shown View full abstract»

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  • Power electronics-an emerging technology

    Page(s): 403 - 412
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (876 KB)  

    The author presents a tutorial review of power electronics and drives in which the status of the technology and its future are discussed. He focuses on power semiconductor devices, converter circuits, AC machine control, and microcomputer applications in power electronics systems. He examines the impact of computer-aided design and artificial intelligence, and he summarizes the technological trends. He predicts that the technology will grow with increasing momentum as component technologies continue to grow View full abstract»

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  • Continuous steering-function control of robot carts

    Page(s): 330 - 337
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB)  

    Three alternative approaches for eliminating steering discontinuities are presented: changing the steering mechanism, changing the guide-point on the cart, or changing the curves on the path. The first approach requires a steering mechanism that allows the cart to move in any direction without changing its heading. The most common configurations in an automatically guided vehicle are the steered-wheel and differential-drive types. The second approach may be a reasonable choice for differential-drive carts but less so for steered-wheel carts because of their limited maneuverability. For applications where the third approach is preferred, two types of curves providing continuous steering functions for both steered-wheel and differential-drive carts are proposed: Cartesian quintics for lane changes and polar splines for symmetric turns of arbitrary angle. These curves have computationally simple, closed-form expressions that provide continuous curvature and precise matching of the boundary conditions at the line-curve junctions on the paths View full abstract»

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  • On the use of the IEEE 802.4 token bus in distributed real-time control systems

    Page(s): 391 - 397
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    The performance of the IEEE 802.4 priority mechanism in handling distributed real-time control traffic is examined. A timer assignment technique is presented for such applications. The timers are set to satisfy the worst-case access delay requirements of real-time control applications. Other applications that are not time constrained can be supported simultaneously. Under certain conditions, such applications can also be guaranteed a minimum bandwidth allocation. Simulation results are used to evaluate the timer assignment scheme View full abstract»

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  • Off-line uninterruptible power supply with zero transfer time using integrated magnetics

    Page(s): 441 - 445
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (408 KB)  

    An offline uninterruptible power supply (UPS) or emergency power system with zero transfer time is presented. The principal application is to personal computers and systems. The power transformer, a triport-like transformer, acts as an inverter and as a voltage stabilizer with no external loading coil. It is made with commercial EI scrapless laminations. The battery charging circuit is integrated into the transformer and improves the dynamic output response during line-mode operation. The result is robust, short-circuit-proof equipment with harmonic distortion of lower than 3%, a static output stability better than 1.5%, and a very high reliability View full abstract»

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  • A study on position servo control systems by frequency-locked technique

    Page(s): 365 - 373
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (604 KB)  

    A frequency-pumped controller (FPC) is presented that processes the position servomechanism by the frequency-locked technique. With the proposed FPC, a position/voltage (P/V) transducer, and a voltage-controlled oscillator (VCO), a frequency-locked position servo (FLPS) control system is established. Mathematical models for the FPC and for the FLPS are constructed, and their stability criteria for in-lock and for out-of-lock cases, respectively, are derived. Computer simulation and experimental results confirm the theoretical prediction that the proposed FLPS can provide real-time control, good stability, higher resolution, and higher precision View full abstract»

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  • A state observer for the permanent-magnet synchronous motor

    Page(s): 374 - 382
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (728 KB)  

    An identity state observer for the permanent-magnet synchronous motor is derived which reconstructs the electrical and mechanical states of the motor from current and voltage measurements. The observer operates in the rotor frame and estimates direct and quadrature stator currents, rotor velocity, and rotor position. Since the rotor position is estimated, the rotor reference frame is approximated using the latest rotor position estimate. The motor dynamics and the transformation into the estimated rotor frame are nonlinear, and thus the observer and observer error dynamics are nonlinear. Therefore, stability is analyzed using a linearized error model. Simulations including realistic measurement disturbances are used to investigate the global stability and accuracy of the observer View full abstract»

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  • Robotic acoustic seam tracking: system development and application

    Page(s): 338 - 348
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (916 KB)  

    The description of an ultrasonic-based seam-tracking robotic system that guides a nonwelding torch along different welding grooves is presented. A 100 kHz airborne transducer is used to inspect the workpiece ahead of a welding torch and measures the joint orientation and lateral deviation caused by curvature or discontinuities in the joint part. Data pertaining to the joint orientation and lateral deviation (echo pulse amplitude and time of flight) are obtained periodically by sampling equi-spaced points along the joint as the torch advances. A trajectory-generating algorithm uses this data to calculate the x, y, θ coordinates of the torch-tip trajectory needed to meet the tracking requirements. The experimental results from a feasibility study conducted to determine if this system could be used for tracking during live welding are also presented View full abstract»

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  • A method for calculating harmonic currents of a three-phase bridge uncontrolled rectifier with DC filter

    Page(s): 434 - 440
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    A practical method is proposed for calculating the harmonic currents of a three-phase bridge uncontrolled rectifier with a DC filter, taking into account the AC source reactance. The method is based on the frequency-domain method and the rectifier switching functions. Analytical equations for the harmonic currents on both the DC and AC sides are derived. The validity of the method is demonstrated by comparison with the results of time simulation. The approach can be extended to the harmonic analysis of a thyristor rectifier as well as a rectifier with unbalanced line conditions View full abstract»

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  • Simulation of AC spacecraft power systems

    Page(s): 398 - 402
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (360 KB)  

    A technique is presented for modeling and simulating AC spacecraft power systems by combining all component models into an overall system model. Each component in the spacecraft power system is treated as a two-port network. A state model is written for each two-port network with the port voltages as the inputs. Each component state model is solved independently using the state transition matrix approach and assuming that its inputs are constant. The inputs to all components are then calculated using network analysis principles. As an example, a 20 kHz system is simulated using this approach, and the results are compared with those of a SPICE2 simulation View full abstract»

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  • Simple SCR and TRIAC PSPICE computer models

    Page(s): 451 - 455
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (316 KB)  

    An ideal voltage-controlled switch provided in PSPICE is used to develop simple computer models for silicon-controlled rectifiers (SCRs) and TRIACs. With additional parameters, most of the thyristor properties are modeled. Detailed modeling of the C149M10 SCR and ZN6346A TRIAC and related applications are described View full abstract»

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  • An algorithmic approach to fault diagnosis in linear systems

    Page(s): 313 - 320
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (632 KB)  

    An algorithmic approach for multiple fault diagnosis of linear discrete-time systems is proposed. Based on notions of an expected deviation vector and variation factors, it is shown that t faults in functional units of a dynamic system can be diagnosed with t+1 sample times. The method is considered efficient when the number of faults is unknown but small and when the sampling period is lengthy, as in chemical process with large time constants. Its effectiveness is illustrated by simulated examples View full abstract»

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  • Single wafer miniature Hall-effect keyboard

    Page(s): 446 - 450
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (320 KB)  

    A design is proposed for a miniature Hall-effect keyboard for use in hand-held calculators. The keyboard includes a set of MOSFETs as the Hall effect sensors and all the necessary electronic components for keyboard control and communication on a single silicon substrate. Because of the elimination of wire connections to each key-cap and the use of MOSFET circuitry for key sensing, the implementation is expected to lead to high reliability and low power consumption. Some design aspects, including mask layout, and process steps are described 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
Phone: +39 0862 434 450
Fax: +39 0862 1960 411