{"title":"The generation of discrete functions within a digital computer","authors":"W. Dejka","doi":"10.1109/TAC.1962.1105472","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105472","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123580043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of an optimal set of radar track-while-scan smoothing equations","authors":"T. Benedict, G. Bordner","doi":"10.1109/TAC.1962.1105477","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105477","url":null,"abstract":"Performance measures are described which realistically reflect both noise-reduction and maneuver-following capability of a radar track-while-scan (TWS) system. Illustrations are given which compare various smoothing equations on the basis of this performance measure. Finally, a set of position-and-velocity tracking equations is synthesized by a calculus-of-variations technique. The synthesized set is optimum for both position and velocity tracking within the given performance sense, in the class of all fixed parameter, linear tracking equations. The resulting optimally synthesized set characterizes the commonly termed \" alpha-beta \" tracker, with the important proviso that beta=alpha^{2}/(2 - alpha) .","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125008816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the real-time control of time-varying linear systems","authors":"J. Meditch, J. Gibson","doi":"10.1109/TAC.1962.1105479","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105479","url":null,"abstract":"A new class of sampled data controls for time-varying dynamic processes is developed and investigated. The notions of interval control, prediction and synthesis of the optimum control variable by a linear combination of orthonormal polynomials in time t are introduced and applied in the optimization of a modified least-squares integral index of performance. Minimization of the index of performance leads to a family of control laws which specify the controller synthesis. The resulting control configuration is optimum on a \"per interval\" basis and is readily realized with available physical components. The design circumvents the complex computational problems associated with the usual calculus of variations and dynamic programming approaches. All controller operations are performed in real time using analog components, and sampling and reset circuits. Controller design is discussed in terms of the available parameters: the relative weighting of system error and control effort, the control interval length, and the degree of the polynomial sum approximation of the control variable. A method of obtaining an engineering estimate of the latter quantity is developed and illustrated by an example. An analog simulation of the control of a second-order dynamic process whose parameter varies in such a manner that the process is unstable at one extremum and heavily damped at the other is presented. Experiments are performed to measure the quality of steady-state control and the transient response of the control scheme.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127748359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the modified z-transform of power spectral densities","authors":"T. Nishimura","doi":"10.1109/TAC.1962.1105466","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105466","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132926151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Describing function as power series","authors":"L. Wadel","doi":"10.1109/TAC.1962.1105468","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105468","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"126 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133086788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Closed loop response of nonlinear systems by a functional transformation approach","authors":"J. Hill","doi":"10.1109/TAC.1962.1105464","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105464","url":null,"abstract":"A graphical technique is presented for determining the closed loop response of nonlinear control systems driven by sinusoidal inputs. The nonlinear portion of the system is represented by its conventional describing function, which may be frequency dependent as well as amplitude dependent. The linear portion of the system is represented by its complex frequency response function G(jomega) . A transparent overlay is used to mechanize a functional transformation similar to that performed by a Nichols chart, allowing rapid determination of the system output for sinusoidal inputs. The accuracy of the method is limited by the accuracy of the describing function approximation. In addition to offering a rapid solution to what has been regarded as a time consuming problem, the method gives the designer sufficient insight into the behavior of the system to allow the intelligent choice of compensating networks to improve system performance. A numerical example is used as a vehicle for discussion of compensation, and experimental results are presented to verify the analysis.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131279582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Theory of a two-parameter adaptive control system","authors":"V. Rajaraman","doi":"10.1109/TAC.1962.1105481","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105481","url":null,"abstract":"A two-parameter adaptive control system employing multiple models and model-parameter perturbation is proposed in this paper. Theoretical studies of this system have shown that it is self-adaptive when both the input signal and the parameters of the system vary unpredictably. It is shown that the two parameters of the feedback system are adjusted automatically along the path of steepest descent of the performance measure-parameters surface. An interesting feature of this system is that the perturbation signals do not appear at the output of the controlled system.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121278114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Image or mirage","authors":"G. Axelby","doi":"10.1109/TAC.1962.1105463","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105463","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115151414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"On the evaluation of the stability determinants in linear discrete systems","authors":"E. Jury","doi":"10.1109/TAC.1962.1105473","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105473","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130558613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}