摘要:

This paper presents the results of further analogue computer studies on discrete-continuous systems with signal dependent sampling constraints. Sampling interval criteria based on the modulus of integral of error and modulus of integral of output rate are both investigated and the concepts of signal dependent or time-varying thresholds and vector constraints are introduced.

ISSN:0020-7179    

DOI:10.1080/00207176608921428

出版商:Taylor & Francis Group    

年代:1966

数据来源: Taylor

摘要:

A control system with backlash in the output gears and resolution in the error-sensing potentiometer is considered. Certain peculiarities in the equivalent describing function are observed. Stability analysis discloses a low-amplitude and low-frequency limit cycle in the system with backlash and resolution while it is found that a no limit cycle exists in the same system without taking potentiometer resolution into consideration. Thus the effect of resolution is to destabilize the system. Analysis by a describing function method and phase-plane study give the same results.

ISSN:0020-7179    

DOI:10.1080/00207176608921429

出版商:Taylor & Francis Group    

年代:1966

数据来源: Taylor

摘要:

Two methods are suggested for the analysis of second-order time delay systems. One of them is graphical and makes use ofx″ + ax’ versusxandx″ + bxversusx’planes (aandbare constants) for getting the time solution of certain second-order non-linear differential-difference equations (d.d.e.). The other method is analytical and is a modification of Poincaré's perturbational series to obtain an explicit solution of d.d.e, in terms of the parameter associated with time delay terms. Also included is a variation of the double delta method for solving general second-order d.d.e. A comparison, in the end, of the methods shows the usefulness and simplicity of the proposed techniques.

ISSN:0020-7179    

DOI:10.1080/00207176608921430

出版商:Taylor & Francis Group    

年代:1966

数据来源: Taylor

摘要:

A Simple technique is demonstrated for synthesizing the optimum control of a bong-bung system, the; control acting for a finite time. The solution is based on the assumption that, in lower-order systems anyway, the control surface converges quickly to the steady-state surface.

ISSN:0020-7179    

DOI:10.1080/00207176608921431

出版商:Taylor & Francis Group    

年代:1966

数据来源: Taylor

摘要:

The present paper is basically concerned with the problem of decomposition of general Boolean functions into unate sub-functions and a study of the associated properties. It is shown that the primary information regarding such a decomposition into unate functions can be had from the cover table representation of the given function. It is also shown how a knowledge of some of the geometrical properties of Boolean functions greatly facilitates recognition of threshold functions in certain special cases. A simplified procedure is finally suggested for realizing a given Boolean function with a fewer number of threshold logic elements. At every stage examples are worked out to show the decomposition and the recognition procedures and to illustrate the synthesis method.

ISSN:0020-7179    

DOI:10.1080/00207176608921432

出版商:Taylor & Francis Group    

年代:1966

数据来源: Taylor

ISSN:0020-7179    

DOI:10.1080/00207176608921433

出版商:Taylor & Francis Group    

年代:1966

数据来源: Taylor