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Date 14-16 June 1982

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Displaying Results 1 - 25 of 269
  • Proceedings of the 1982 American Control Conference

    Publication Year: 1982 , Page(s): 1
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    Freely Available from IEEE
  • Copyright page

    Publication Year: 1982 , Page(s): 2
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    Freely Available from IEEE
  • Sponsoring Organization

    Publication Year: 1982 , Page(s): 3
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    Freely Available from IEEE
  • To the memory of our colleague: Richard V. Monlopoli

    Publication Year: 1982
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    Freely Available from IEEE
  • ACC 1982 Program at a Glance

    Publication Year: 1982 , Page(s): 5
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    Freely Available from IEEE
  • Table of contents and Program

    Publication Year: 1982 , Page(s): 6 - 26
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    Freely Available from IEEE
  • Participant index

    Publication Year: 1982 , Page(s): 27 - 30
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    Freely Available from IEEE
  • Foreword

    Publication Year: 1982 , Page(s): 1
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    Freely Available from IEEE
  • Parameter Estimation and Control of Distributed Systems with Application to Large Deployable Antennae

    Publication Year: 1982 , Page(s): 1 - 6
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (665 KB)  

    This paper will examine the estimation and control of distributed parameter systems which have application to the shape control of a large deployable communications antenna (~100 meters in diameter). Such an antenna would be collapsed and carried into orbit by the NASA space shuttle. Once in orbit, the antenna would automatically deploy like a collapsable umbrella. The antenna surface would be qui... View full abstract»

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  • Number, and Placement of Control System Actuators Considering Possible Failures

    Publication Year: 1982 , Page(s): 7 - 15
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1288 KB)  

    One of the first questions facing the designer of the control system for a large space structure is how many components¿actuators and sensors¿to specify and where to locate them on the structure. This paper presents a methodology which is intended to assist the designer in this process with respect to actuators. A measure of controllability is defined which is a quantitative indication of how we... View full abstract»

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  • Least-Squares Sequential Parameter and State Estimation for Large Space Structures

    Publication Year: 1982 , Page(s): 16 - 21
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (571 KB)  

    This paper presents the formulation of simultaneous state and parameter estimation problems for flexible structures in terms of least-squares minimization problems. The approach combines an on-line order determination algorithm, with least-squares algorithms for finding estimates of modal approximation functions, modal amplitudes, and modal parameters. The approach combines previous results on sep... View full abstract»

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  • On the Selection of Optimal Bandwidths for LSS Controllers

    Publication Year: 1982 , Page(s): 22
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (131 KB)  

    It has been established that any linear dynamical feedback controller (complete with model errors) will not destabilize a stable physical plant if the controller gain is "small" enough. It has also been established that any linear dynamical feedback controller will always destabilize the physical plant if the gains are "large" enough. The first result follows naturally from the laws of continuity.... View full abstract»

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  • Bifurcation and Limit Cycle Analysis of Nonlinear Systems with an Application to Aircraft at High Angles of Attack

    Publication Year: 1982 , Page(s): 23 - 27
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (742 KB)  

    A new approach is presented for analyzing nonlinear and high-¿ dynamic behavior and stability of aircraft. This approach involves the application of bifurcation analysis and catastrophe theory methodology to specific phenomena such as stall, departure, spin entry, flat and steep spin, nose slice, and wing rock. Quantitative results of a global nature are generated using numerical techniques based... View full abstract»

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  • Dynamic Analysis of the Electrostatically Controlled Membrane Mirror using Multiple Scales

    Publication Year: 1982 , Page(s): 28 - 33
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (690 KB)  

    The vibrational dynamics of an electrostatically controlled membrane mirror are investigated. The motion is described by a nonlinear partial differential equation with nonconstant coefficients. The system equation is first linearized and then parameterized. The resulting equation is a singularly perturbed linear partial differential equation with variable coefficients. Asymptotic approximations ar... View full abstract»

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  • The Janet/Busch Oscillator: A Multivibratory Dissipative Structure Relevant to Dynamo Theories of Geomagnetic Flux Reversals

    Publication Year: 1982 , Page(s): 34 - 39
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (615 KB)  

    A dynamo model of geomagnetism displaying multivibratory flux reversals is presented. This model employs a little-known but century-old motor/ generator system; it can be obtained from Bullard's original series dynamo model by replacing his short-circuit with a virtual loaded capacitor, realized by a separately-excited motor. This resulting system furnishes a dissipative structure whose symmetry-b... View full abstract»

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  • Deadbeat Error Control of Discrete Multivariable Systems

    Publication Year: 1982 , Page(s): 40 - 45
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (771 KB)  

    First Page of the Article
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  • Conversion of Existing Continuous Control Systems into Digital Control Systems

    Publication Year: 1982 , Page(s): 46 - 51
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (606 KB)  

    The problem of converting existing continuous data control systems into digital control systems is considered. The objective of this paper is to develop a computer-aided method for synthesizing the pulse-transfer function of the digital controller. This is done by matching the frequency response of the digital control system to that of the continuous system with a minimum weighted mean square erro... View full abstract»

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  • On Choice of the Quantization Interval in Stochastic Control Systems

    Publication Year: 1982 , Page(s): 52 - 56
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (506 KB)  

    The paper is concerned with choice of time intervals between measurements of output coordinates and generations of control signals in control systems for stochastic discontinuous plants. View full abstract»

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  • A Z-Domain Controller Design Method for Sampled-Data Systems Having Feedback Dynamics

    Publication Year: 1982 , Page(s): 57 - 59
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (308 KB)  

    A design method for sampled-data systems having dynamics in the (single) feedback path is described. The method is an alternative to such well-known methods as those of Ragazzini, Dablin, and Kalman in which feedback dynamics are difficult to handle. With the method described here, the designer has substantial flexibility in specifying the closed-loop transfer tunction and is guaranteed a stable c... View full abstract»

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  • Bridging the Gap between Data Acquition, Probe Control and Data Reduction, using a Microcomputer System

    Publication Year: 1982 , Page(s): 60 - 62
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2635 KB)  

    This paper describes a microprocessor-controlled data-acquisition and data reduction system for large scale engineering tests. The microcomputer also controls automatic testing probe positioning, and furnishes the opportunity for generating an engineering report via word processing. The micro-computer has been interfaced with off-the-shelf type step motors to move the probes to the desired locatio... View full abstract»

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  • Look-Ahead Digital Control of Single-Input, Single-Output Linear Systems

    Publication Year: 1982 , Page(s): 63 - 68
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (547 KB)  

    Look-ahead or preview control is possible where future knowledge of system inputs is available. Designs based on look-ahead control can result in significant improvements in performance In this paper, a systematic development is given for deterministic look-ahead digital control of single-input, single-output linear systems. View full abstract»

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  • Case Studies in Direct Digital Control of Stochastic Systems

    Publication Year: 1982 , Page(s): 69 - 70
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (265 KB)  

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  • Finite Settling-Time Controllers from the Process Transfer Matrix

    Publication Year: 1982 , Page(s): 71 - 72
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (235 KB)  

    In control literature a variety of deadbeat control algorithms is presented. In this paper a realization will be presented that is very well suited for process control. For a number of situations (unstable processes, nonminimum phase behaviour) elegant algorithms will be derived. The computation of the algorithms from the process transfer matrix is straightforward. The use of the algorithms will b... View full abstract»

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  • We've Come a Long Way, but We're Still Far from Home

    Publication Year: 1982 , Page(s): 73
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (142 KB)  

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  • Computing the Relative Gains for Pressure and Composition Control of a Single Distillation Tower

    Publication Year: 1982 , Page(s): 74 - 80
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (915 KB)  

    This paper treats calculation of the steady-state relative gains for controlling a single distillation tower. A detailed mathematical model is formulated and solved by a modified Wang and Henke method. Three columns of 90%-10%, 95%-5%, and 99%-1% end product compositions for a benzene-toluene system are considered. The computational results show that the size of the perturbation used to calculate ... View full abstract»

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