{"title":"A numerical investigation of phase and magnitude compensation in adaptive control of uncertain hammerstein systems with hysteretic nonlinearities","authors":"M. A. Janaideh, D. Bernstein","doi":"10.1109/CDC.2014.7039438","DOIUrl":"https://doi.org/10.1109/CDC.2014.7039438","url":null,"abstract":"We apply retrospective cost adaptive control (RCAC) to a command-following problem for uncertain Hammerstein systems with Duhem hysteresis nonlinearities. The only required modeling information of the linear plant is a single Markov parameter. We numerically investigate the sense in which RCAC achieves internal model control. The properties of the asymptotic controller are analyzed by using phase shift calculations.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114491915","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}
David Sturzenegger, D. Gyalistras, Vito Semeraro, M. Morari, Roy S. Smith
{"title":"BRCM Matlab Toolbox: Model generation for model predictive building control","authors":"David Sturzenegger, D. Gyalistras, Vito Semeraro, M. Morari, Roy S. Smith","doi":"10.1109/ACC.2014.6858967","DOIUrl":"https://doi.org/10.1109/ACC.2014.6858967","url":null,"abstract":"Model predictive control (MPC) is a promising alternative in building control with the potential to improve energy efficiency and comfort and to enable demand response capabilities. Creating an accurate building model that is simple enough to allow the resulting MPC problem to be tractable is a challenging but crucial task in the control development. In this paper we introduce the Building Resistance-Capacitance Modeling (BRCM) Matlab Toolbox that facilitates the physical modeling of buildings for MPC. The Toolbox provides a means for the fast generation of (bi-)linear resistance-capacitance type models from basic building geometry, construction and systems data. Moreover, it supports the generation of the corresponding potentially time-varying costs and constraints. The Toolbox is based on previously validated modeling principles. In a case study a BRCM model was automatically generated from an EnergyPlus input data file and its predictive capabilities were compared to the EnergyPlus model. The Toolbox itself, the details of the modeling and the documentation can be found at www.brcm.ethz.ch.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126606039","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}
K. K. Kim, Hong Jang, R. B. Gopaluni, Jay H. Lee, R. Braatz
{"title":"Sparse identification in chemical master equations for monomolecular reaction networks","authors":"K. K. Kim, Hong Jang, R. B. Gopaluni, Jay H. Lee, R. Braatz","doi":"10.1109/ACC.2014.6859312","DOIUrl":"https://doi.org/10.1109/ACC.2014.6859312","url":null,"abstract":"This paper considers the identification of kinetic parameters associated with the dynamics of closed biochemical reaction networks. These reaction networks are modeled by chemical master equations in which the reactions and the associated concentrations/populations of species are characterized by probability distributions. The vector of unknown kinetic parameters is usually highly sparse. Using this sparsity, a robust statistical estimation algorithm is developed to estimate the kinetic parameters from stochastic experimental data. The algorithm is based on regularized maximum likelihood estimation and it is shown to be decomposable into a two-stage optimization. The first-stage optimization has a closed-form solution and the second-stage optimization is to maximize sparsity in the kinetic parameter vector with a guaranteed data-fitting error. The second-stage optimization can be solved using off-the-shelf algorithms for constrained ℓ1 minimization.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114369582","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}
J. Beach, Matthew E. Argyle, T. McLain, R. Beard, S. Morris
{"title":"Tailsitter heading estimation using a magnetometer","authors":"J. Beach, Matthew E. Argyle, T. McLain, R. Beard, S. Morris","doi":"10.1109/ACC.2014.6859443","DOIUrl":"https://doi.org/10.1109/ACC.2014.6859443","url":null,"abstract":"The tailsitter aircraft merges the endurance and speed of fixed-wing aircraft with the flexibility and VTOL abilities of rotorcraft. Typical control and estimation schemes make assumptions about the maximum attitude an aircraft will experience that are not valid for tailsitters. This paper discusses the limitations of a typical EKF magnetometer measurement update that uses Euler angles. It is shown how to use a second set of Euler angles to avoid gimbal lock. A method is given that bypasses the use of Euler angles altogether and directly uses the quaternion to determine heading error and update the attitude estimate. This method highlights the EKF limitations in estimating a quaternion. A multiplicative EKF is briefly explored to overcome these limitations. Hardware results on an actual tailsitter aircraft are presented.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126881873","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":"Compositional finite-time stability analysis of nonlinear systems","authors":"S. Tabatabaeipour, M. Blanke","doi":"10.1109/ACC.2014.6859034","DOIUrl":"https://doi.org/10.1109/ACC.2014.6859034","url":null,"abstract":"This paper, investigates finite-time stability and finite-time boundedness for nonlinear systems with polynomial vector fields. Finite-time stability requires the states of the system to remain a given bounded set in a finite-time interval and finite-time boundedness considers the same problem for the system but with bounded disturbance. Sufficient conditions for finite-time stability and finite-time boundedness of nonlinear systems as well as a computational method based on sum of squares programming to check the conditions are given. The problem of finite-time stability for a system that consists of an interconnection of subsystems is also considered and we show how to decompose the problem into subproblems for each subsystem with coupling constraints. A solution to the problem using sum of squares programming and dual decomposition is presented. The method is demonstrated through some examples.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130566661","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":"Occupancy estimation for smart buildings by an auto-regressive hidden Markov model","authors":"Bing Ai, Zhaoyan Fan, R. Gao","doi":"10.1109/ACC.2014.6859372","DOIUrl":"https://doi.org/10.1109/ACC.2014.6859372","url":null,"abstract":"One of the primary energy consumers in buildings are the Heating, Ventilation, and Air-Conditioning (HVAC) systems, which usually operate on a fixed schedule, i.e., running from early morning until late evening during the weekdays. This fixed operation schedule does not take the dynamics of occupancy level in the building into consideration, therefore may lead to waste of energy. An estimate of the number of occupants in the building with time can contribute to improving the control policy of the building's HVAC system by reducing energy consumption. In this paper, the auto-regressive hidden Markov model (ARHMM), is investigated to estimate the number of occupants in a research laboratory in a building using a wireless sensor network deployed. The network is composed of stand-alone sensing nodes with wireless data transmission capability, a base station that collects data from the sensing nodes, and a server to analyze the data from the base station. Experimental results and numerical simulation demonstrate that the ARHMM is more effective in estimating the number of occupants in the laboratory than the HMM algorithm, especially when the occupancy level fluctuates frequently.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"332 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115974536","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":"Computational issues on observability and optimal sensor locations","authors":"Sarah King, W. Kang, Liang Xu","doi":"10.1109/ACC.2014.6858768","DOIUrl":"https://doi.org/10.1109/ACC.2014.6858768","url":null,"abstract":"In this paper we discuss computational issues related to optimal sensor placement in numerical weather prediction (NWP). Specifically we will discuss the application of observability as a metric for sensor placement to an atmospheric flow model and the arising optimization problem. Atmospheric data assimilation is the process of estimating the initial system state based on observations needed in NWP to produce a forecast of future weather conditions. Optimal placement of sensors for data assimilation leading to an improvement in the analysis of the data assimilation and improved forecast quality is of great interest. The traditional definition of observability is not necessarily suitable for NWP applications because of the high dimensions used in NWP. We use the concept of partial observability where the observability of a system is computed on a reduced subspace and is obtained using dynamic optimization. This definition allows for a characterization of the observability of complicated systems. Using partial observability for optimal sensor placement leads to a max-min problem. We use an empirical gramian to reduce this problem into one of eigenvalue optimization. Our focus will be to develop computational methods that are both efficient and scalable. We will leverage tools typically available in data assimilation and introduce tools used in nonsmooth optimization. We will use the shallow water equations as a testbed for our method of optimal sensor placement in four dimensional variational data assimilation.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131352598","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":"Risk adjusted forecasting of electric power load","authors":"Saahil Shenoy, D. Gorinevsky","doi":"10.1109/ACC.2014.6859465","DOIUrl":"https://doi.org/10.1109/ACC.2014.6859465","url":null,"abstract":"Load forecasting of energy demand is usually focused on mean values in related statistical models and ignores rare peak events. This paper provides Extreme Value Theory analysis of the peak events in electrical power load demand. It estimates risk of the peak events by combining forecast of the mean with extreme value modeling of distribution tail. The approach is demonstrated for electric load demand data for a US utility. The problem is to find the forecast margins that keep the risk of demand exceeding forecast plus the margin to one event per year. The long tail model of the peak events is more accurate and yields 50% larger margin compared to the normal distribution model. These results show that the long tail behavior of the forecast errors must be taken into account when trying to keep outage risk low.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130880167","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":"NonLinear Fault Tolerant Flight Control for generic actuators fault models","authors":"P. Castaldi, N. Mimmo, S. Simani","doi":"10.1109/ACC.2014.6858813","DOIUrl":"https://doi.org/10.1109/ACC.2014.6858813","url":null,"abstract":"This paper presents an Active Fault Tolerant Flight Control applied to an aircraft nonlinear longitudinal model in presence of simultaneous faults on both elevator and thrust actuators. The overall control system is based on a Fault Detection and Diagnosis module, designed by the NonLinear Geometric Approach, allowing fault isolation. Is consists of adaptive filters based on Radial Basis Functions Neural Network, which provides the estimation of generic faults. These estimates are exploited to reconfigure the controller by means of a further feedback loop. To the best of the authors' knowledge, this work represents the first application of such Active Fault Tolerant Control to an aircraft control system. The simulation results demonstrate the efficacy of the proposed method, which maintains the aircraft in a safe flight envelope in case of actuator faults.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131242683","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-line impulse response extraction of a power transfer path using pulse compression probing","authors":"N. Wu, Jianzhuang Huang","doi":"10.1109/ACC.2014.6859305","DOIUrl":"https://doi.org/10.1109/ACC.2014.6859305","url":null,"abstract":"Measurement-based extraction of non-parametric small signal models of power transfer paths in real-time can greatly benefit wide-area control, monitoring, and protection of a power system. This paper explores the feasibility of using pulse compression (PC) probing for on-line identification of impulse responses and change detection of selected power transfer paths. These real-time schemes become possible due to the increasing presence of modern power electronic control devices in, for example, high voltage dc (HVDC) transmission systems, as well as networked measurement devices of high reporting rates, such as phasor measurement units (PMUs). The paper discusses the principle of PC probing, including probing signal synthesis, injection, and the acquisition of perturbed system measurements for on-line extraction of small signal impulse responses. A 5-bus test power system is built to illustrate the results of impulse response identification, and change detection using pulse-compression probing.","PeriodicalId":369729,"journal":{"name":"2014 American Control Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114315053","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}