{"title":"Further disscusion of \"Optimization based on a square-error criterion with an arbitrary weighting function\" and \"A mean-weighted square-error criterion for optimum filtering of non-stationary random precesses\"","authors":"J. Zaborszky, G. Murphy","doi":"10.1109/TAC.1962.1105452","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105452","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116423854","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":"A note on the use of impulse excitations to reach farthest from zero state of a given system","authors":"S. Gupta","doi":"10.1109/TAC.1962.1105442","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105442","url":null,"abstract":"","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"199 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133501570","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":"Adaptive control through sinusoidal response","authors":"K. Smith","doi":"10.1109/TAC.1962.1105429","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105429","url":null,"abstract":"An investigation has been made in the application of sinusoidal techniques to adaptive feedback control systems. The adaptive feature of this approach is an automatic gain control. These systems contain two loops: a basic or primary control loop and an adaptive control loop. The forward-path gain of the basic loop is adjusted by the adaptive loop. A sine wave test signal is added continuously to the basic loop input and to a model. The phase shift or the amplitude of the basic loop output is measured by an adaptive computer which adjusts the forward-path gain in an attempt to hold the measured amplitude or phase-shift constant. This paper contains derivations of the adaptive loop response to changes in the process gain factor for several cases. Some of the considerations pertaining to the design of the adaptive control loop are also given.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115571938","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":"Control concepts for nuclear ramjet reactors","authors":"R. Finnigan","doi":"10.1109/TAC.1962.1105433","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105433","url":null,"abstract":"Tory II-A, the first experimental reactor in the Pluto nuclear ramjet program, will be tested in late 1960 at the Nevada Test Site of the Atomic Energy Commission. The fundamental objective of Tory II-A is to demonstrate that a high power-density, high-temperature, air-cooled reactor can be successfully designed, constructed, and operated. This application places requirements on the reactor control system which are considerably more stringent than those found in previous reactor systems, both from the standpoint of radiation environment and system performance. To fulfill the system requirements a high-performance reactor control system has been designed and built; control actuation hardware has been developed which can withstand the high-radiation environment of Tory II-A. This actuation system features radiation-tolerant electrohydraulic components: actuators, servo-valves, solenoid valves, feedback transducers, accumulators and associated hydraulic components. To provide high reliability against undesired shutdowns while carrying out high power level transients, the Tory II-A control philosophy includes a new concept in reactor safety: reliance on a nonlocking, fast-reset safety system during accident situations. The fast-reset system acts so as to hold the programmed power level rather than initiating an irreversible \"scram\" action. A reactor \"scram,\" if tolerated, could produce thermal shocks which would seriously damage the core components.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130846710","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":"Optimalizing control with process-dynamics identification","authors":"P. Eykhoff, O. Smith","doi":"10.1109/TAC.1962.1105434","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105434","url":null,"abstract":"The meaning of the terms process identification, adaptive and optimalizing control is indicated. The basic difference between these types of control and the ordinary ones is the need for a \"learning process\". Using multiplication plus integration as the simplest possible type of \"learning\", simple schemes are obtained in which sinusoidals or random fluctuations may be used as test signals. A more detailed study and an analog simulation have been made of such an optimalizing system. This one is free from the defects of formerly proposed systems, i.e.: - the detrimental effects of system dynamics on the optimalizing control action, - the loop gain changes and even instability of the optimalizing control loop when the process dynamics change with time. This has been achieved by introducing a model of the process dynamics, the parameter(s) of which are controlled by an identifying-control loop. A typical value for the convergence speed towards the optimum of the optimalizing control can be given as follows: using a sinusoidal test signal, the transient for a step-disturbance is approximately of the form epsilon^{-t/tau} where the value of τ corresponds with three periods of the test signal used. Although the system is nonlinear and time varying, some analytical results have been obtained which check the computer results. The ideas presented can be extended to more-dimensional optimalization and more-parameter identification.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124499949","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":"A non-linear analysis technique for an on-off servo with velocity inputs","authors":"H. Farrah","doi":"10.1109/TAC.1962.1105425","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105425","url":null,"abstract":"Optimum transient response can theoretically be obtained with a servo system operated in an on-off mode. Although phase plane techniques can produce an optimum system for positional inputs, it is shown that a phase plane analysis is invalid for velocity inputs for a type 1 control servo. A novel approach to the problem is presented which permits an optimum switching procedure to be obtained for velocity inputs, while validity is retained for positional inputs. The resulting system has the properties that the steady state error for both velocity and positional inputs is zero, and no more than two switching cycles are ever needed to return the error to zero.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122508298","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":"A phase space investigation of bi-stable systems by means of vectors","authors":"R. Halstenberg","doi":"10.1109/TAC.1962.1105430","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105430","url":null,"abstract":"An investigation is made to determine the conditions under which a third order system with a bi-stable element will maintain a high frequency oscillation rather than exhibit simple relay switching. A criterion is developed in general terms. The study is made in phase space and vectors are used to determine the direction in which the trajectory intersects the switching plane. The appendix contains an example wherein the criterion is applied to a specific system and the results compared with computer data.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121194598","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":"Synchronous networks","authors":"G. Weiss","doi":"10.1109/tac.1962.1105424","DOIUrl":"https://doi.org/10.1109/tac.1962.1105424","url":null,"abstract":"\"Synchronous\" networks, also called \"chopper\" networks and \"commutated\" networks, consist of passive elements plus driven switches or choppers. R-C chopper networks have been used occasionally as compensating networks in A-C servos. Their main advantage is a response independent of carrier frequency variation, and freedom from zero drift. Their main disadvantage is noise output in the form of harmonics of the carrier. In this paper a rigorous analysis of an idealized R-C loaded chopper is presented. It is shown that the main component of the response is indeed independent of the carrier frequency.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121281358","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":"Stability and control of nuclear rocket propulsion","authors":"R. Mohler","doi":"10.1109/TAC.1962.1105432","DOIUrl":"https://doi.org/10.1109/TAC.1962.1105432","url":null,"abstract":"A systems treatment of the dynamic behavior of nuclear rocket propulsion systems is presented. This simplified analysis does represent the basic ideas of more detailed computer studies. Nuclear reactor systems for space propulsion are much faster than conventional reactor systems which complicates the controls problem. (The dynamics of chemical systems have been simpler in nature due to their speed of response.) One attractive solution, which uses the propellant reactivity, is discussed.","PeriodicalId":226447,"journal":{"name":"Ire Transactions on Automatic Control","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1962-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126944311","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}