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An Intelligent Rule-Based Compensator for Control System Input Nonlinearities 基于规则的控制系统输入非线性智能补偿器
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.23919/ACC.1990.4790981
M. Marcos, P. Wellstead
{"title":"An Intelligent Rule-Based Compensator for Control System Input Nonlinearities","authors":"M. Marcos, P. Wellstead","doi":"10.23919/ACC.1990.4790981","DOIUrl":"https://doi.org/10.23919/ACC.1990.4790981","url":null,"abstract":"The paper presents an Al alternative to classical control compensation procedures for input nonlinearities. Specifically, a rule-based system is developed which compensates for dead-zone phenomena in a position control servo-mechanism. The rule-based system compensator is based around a supervisory module which is designed to detect and avoid undesirable nonlinear control phenomena such as steady state errors, limit cycling or excursions into unwanted zones. The heuristics within the supervisor also allow abnormal situations to be detected and avoided. The technique is thus potentially far more powerful than conventional non-linear compensation procedures such as `dither'. As such, it constitutes an intelligent compensator for system input nonlinearities which may be generalizated to other nonlinearity types.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124637541","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}
引用次数: 3
Job Shop Scheduling with Simple Precedence Constraints 具有简单优先约束的作业车间调度
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.1109/ACC.1990.4173697
D. Hoitomt, P. Luh, K. Pattipati
{"title":"Job Shop Scheduling with Simple Precedence Constraints","authors":"D. Hoitomt, P. Luh, K. Pattipati","doi":"10.1109/ACC.1990.4173697","DOIUrl":"https://doi.org/10.1109/ACC.1990.4173697","url":null,"abstract":"This paper presents a near-optimal scheduling methodology for job shops where each job consists of a small number of operations. Each operation requires a particular machine type for a specified processing time. There may be a \"timeout\" between successive operations for inspection, heat treatment, paperwork or other processing which does not require the use of the machine types under consideration Jobs also have different due dates and different levels of importance. The objective is to minimize the total weighted quadratic tardiness of the schedule. We present an efficient near-optimal scheduling method based on the Lagrangian relaxation technique and the list scheduling concept. The dual cost is a lower bound on the objective function, and can be used to measure the quality of the schedule generated. The multipliers contain sensitivity information, and can be used to answer a wide range of \"what if\" questions. Since the status of the shop does not change much from day to day, the multipliers can be easily updated and schedules can be efficiently reconfigured to incorporate new jobs and other changes occurring in the system. Most numerical results are within 1% of the dual optimum and are obtained with reasonable CPU times.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124666199","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}
引用次数: 4
Using Uniformization for Derivative Estimation in Simulation 用均匀化方法进行仿真导数估计
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.1109/ACC.1990.4173906
P. Vakili
{"title":"Using Uniformization for Derivative Estimation in Simulation","authors":"P. Vakili","doi":"10.1109/ACC.1990.4173906","DOIUrl":"https://doi.org/10.1109/ACC.1990.4173906","url":null,"abstract":"Using uniformization procedure, two classes of performance derivative estimation algorithms are defined for discrete-event systems that can be modeled as continuous time Markov chains.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129454349","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}
引用次数: 6
A Frequency Domain Design Method For Sampled-Data Compensators 采样数据补偿器的频域设计方法
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.1109/ACC.1990.4173934
H. Niemann, O. Jannerup
{"title":"A Frequency Domain Design Method For Sampled-Data Compensators","authors":"H. Niemann, O. Jannerup","doi":"10.1109/ACC.1990.4173934","DOIUrl":"https://doi.org/10.1109/ACC.1990.4173934","url":null,"abstract":"A new approach to the design of a sampled-data compensator in the frequency domain is investigated. The starting point is a continuous-time compensator for the continuous-time system which satisfy specific design criteria. The new design method will graphically show how the discrete-time compensator and the sampling period should be selected so the sampled-data feedback system approximate the continuous-time feedback system as good as possible.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129649066","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}
引用次数: 1
Convexity Property of the One-sided Multivariable Stability Margin 单侧多变量稳定裕度的凸性
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.23919/ACC.1990.4790719
J. Tekawy, M. Safonov, R. Chiang
{"title":"Convexity Property of the One-sided Multivariable Stability Margin","authors":"J. Tekawy, M. Safonov, R. Chiang","doi":"10.23919/ACC.1990.4790719","DOIUrl":"https://doi.org/10.23919/ACC.1990.4790719","url":null,"abstract":"In evaluating the stability robustness of multivariable control systems having \"one-sided\" parameter uncertainty, a problem that naturally arises is the minimization over diagonal matrices D of the greatest eigenvalue of (eD Ae-D + (eD Ae-D)*)/2. The minimization is proved to be convex, thus guaranteeing that every local minimum, is also a global minimum and, in theory, guaranteeing the global convergence of generalised gradient nonlinear programming algorithms for computing the minimizing D.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127024652","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}
引用次数: 6
Robust Design for the Microprocessor-Based Indirect Field Orientation Control of a Squirrel-Cage Induction Motor 基于微处理器的鼠笼式异步电动机磁场定向间接控制鲁棒设计
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.23919/ACC.1990.4791095
Wei-Song Lin, T. Ho
{"title":"Robust Design for the Microprocessor-Based Indirect Field Orientation Control of a Squirrel-Cage Induction Motor","authors":"Wei-Song Lin, T. Ho","doi":"10.23919/ACC.1990.4791095","DOIUrl":"https://doi.org/10.23919/ACC.1990.4791095","url":null,"abstract":"A robust design method for the microprocessor-based indirect field orientation control of a squirrel-cage induction motor is presented. The dynamic behavior of the induction motor which is controlled by usig the technique of indirect field-oriented decoupling is approximated by a mathematical model as for a shunt dc motor. The robustness of the system with respect to model uncertainty, imperfect decoupling and load variation is achieved by attaching an interaction compensator to adapt the quadrature voltage delivered by the PWM power driver. The goal of the interaction compensator which is designed by using model following technique with high gain feedback is to maintain the induction motor behaving as a precribed model as closely as possible. The time lag in measurement and computation is considered and compensated as a one-step time delay. Consequently, the indirect field orientation control is not necessarily depend on precise modelling of the motor system especially the precise measurement of the rotor time constant. Using a sixteen-bit microcomputer and a voltage source, PWM-type, power driver with current feedback, a robust motion control system is implemented for a three horse power induction motor. Results from both experiments and computer simulations are demonstrated.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127240276","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}
引用次数: 0
Linear fractional transformations and J-lossless factorization in H∞ control theory H∞控制理论中的线性分数阶变换和j -无损分解
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.23919/ACC.1990.4791291
H. Kimura
{"title":"Linear fractional transformations and J-lossless factorization in H∞ control theory","authors":"H. Kimura","doi":"10.23919/ACC.1990.4791291","DOIUrl":"https://doi.org/10.23919/ACC.1990.4791291","url":null,"abstract":"The linear fractional transformation, the lossless (all-pass) system and the canonical (inner-outer) factorization are three key notions in the frequency domain approach to the H∞ control problem. It is shown that these three notions are combined more naturally and systematically in the chain-scattering formalism to establish a conceptual framework of H∞ control theory. In our framework, we can treat both the one-block and the four-block cases in a unified way, based on an extension of homographic transformation. It is shown that the problem is reduced to the J-lossless factorization of a certain matrix, which is a slight modification of a J-spectral factorization.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127301146","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}
引用次数: 4
Quantification of Uncertainty in Estimation 评估中不确定度的量化
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.1109/ACC.1990.4174167
G. Goodwin, B. Ninness, M. Salgado
{"title":"Quantification of Uncertainty in Estimation","authors":"G. Goodwin, B. Ninness, M. Salgado","doi":"10.1109/ACC.1990.4174167","DOIUrl":"https://doi.org/10.1109/ACC.1990.4174167","url":null,"abstract":"Models of physical processes rarely give an exact description of the system's response. Thus an important issue is the quantification of errors in model estimation due to model inadequacy. We show that this problem can be formulated using a Bayesian approach leading to simple formulae for model uncertainty. Techniques for minimizing the amount of computation are also discussed.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127479879","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}
引用次数: 74
The Effect of Horizon Length on The-Assignment Property of Receding-Horizon Controllers 水平长度对后退-水平控制器分配特性的影响
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.23919/ACC.1990.4790712
E. Yaz
{"title":"The Effect of Horizon Length on The-Assignment Property of Receding-Horizon Controllers","authors":"E. Yaz","doi":"10.23919/ACC.1990.4790712","DOIUrl":"https://doi.org/10.23919/ACC.1990.4790712","url":null,"abstract":"The purpose of this paper is to bring out a relationship between the choice of the horizon length in receding horizon controllers and the average stability degree of the resulting closed loop poles.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128976787","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}
引用次数: 0
The Constrained Lyapunov Problem Applied to the Case of a Linear Plant with an Ad Hoc Linear Output Feedback Nominal Stabilizing Controller 具有自组织线性输出反馈标称稳定控制器的线性对象的约束Lyapunov问题
1990 American Control Conference Pub Date : 1990-05-23 DOI: 10.1109/ACC.1990.4174288
T. Wilson, C. Blackwell
{"title":"The Constrained Lyapunov Problem Applied to the Case of a Linear Plant with an Ad Hoc Linear Output Feedback Nominal Stabilizing Controller","authors":"T. Wilson, C. Blackwell","doi":"10.1109/ACC.1990.4174288","DOIUrl":"https://doi.org/10.1109/ACC.1990.4174288","url":null,"abstract":"Given a stabilizing linear output feedback control for a given linear system, we show how to determine if the candidate control is consistent with the constrained Lyapunov problem; i.e., the chosen output feedback can be obtained by the proper choice of a Lyapunov function for the stabilized system. Necessary and sufficient conditions are stated, a solution procedure is developed, and an illustrative example is provided.","PeriodicalId":307181,"journal":{"name":"1990 American Control Conference","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125675694","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}
引用次数: 1
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