{"title":"CUSUM and chi-squared attack detection of compromised sensors","authors":"C. Murguia, Justin Ruths","doi":"10.1109/CCA.2016.7587875","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587875","url":null,"abstract":"A vector-valued model-based cumulative sum (CUSUM) procedure is proposed for identifying falsified sensor measurements. To fulfill a desired detection performance, given the system dynamics, we derive tools for tuning the CUSUM procedure. We characterize the state degradation that a stealthy attacker can induce to the system while remaining undetected by the detection procedure. We quantify the advantage of using a dynamic detector (CUSUM), which leverages the history of the state, over a static detector (chi-squared) which uses a single measurement at a time. Simulation experiments are presented to illustrate the performance of the detection scheme.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132590380","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":"Sampling-based stochastic optimal control with metric interval temporal logic specifications","authors":"Felipe J. Montana, Jun Liu, T. Dodd","doi":"10.1109/CCA.2016.7587911","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587911","url":null,"abstract":"This paper describes a method to find optimal policies for stochastic dynamic systems that maximise the probability of satisfying real-time properties. The method consists of two phases. In the first phase, a coarse abstraction of the original system is created. In each region of the abstraction, a sampling-based algorithm is utilised to compute local policies that allow the system to move between regions. Then, in the second phase, the selection of a policy in each region is obtained by solving a reachability problem on the Cartesian product between the abstraction and a timed automaton representing a real-time specification given as a metric interval temporal logic formula. In contrast to current methods that require a fine abstraction, the proposed method achieves computational tractability by modelling the coarse abstraction of the system as a bounded-parameter Markov decision process (BMDP). Moreover, once the BMDP is created, this can be reused for new specifications assuming the same stochastic system and workspace. The method is demonstrated with an autonomous driving example.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126272661","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}
Parasara Sridhar Duggirala, Chuchu Fan, Matthew Potok, Bolun Qi, S. Mitra, Mahesh Viswanathan, Stanley Bak, Sergiy Bogomolov, Taylor T. Johnson, L. V. Nguyen, Christian Schilling, A. Sogokon, Hoang-Dung Tran, Weiming Xiang
{"title":"Tutorial: Software tools for hybrid systems verification, transformation, and synthesis: C2E2, HyST, and TuLiP","authors":"Parasara Sridhar Duggirala, Chuchu Fan, Matthew Potok, Bolun Qi, S. Mitra, Mahesh Viswanathan, Stanley Bak, Sergiy Bogomolov, Taylor T. Johnson, L. V. Nguyen, Christian Schilling, A. Sogokon, Hoang-Dung Tran, Weiming Xiang","doi":"10.1109/CCA.2016.7587948","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587948","url":null,"abstract":"Hybrid systems have both continuous and discrete dynamics and are useful for modeling a variety of control systems, from air traffic control protocols to robotic maneuvers and beyond. Recently, numerous powerful and scalable tools for analyzing hybrid systems have emerged. Several of these tools implement automated formal methods for mathematically proving a system meets a specification. This tutorial session will present three recent hybrid systems tools: C2E2, HyST, and TuLiP. C2E2 is a simulated-based verification tool for hybrid systems, and uses validated numerical solvers and bloating of simulation traces to verify systems meet specifications. HyST is a hybrid systems model transformation and translation tool, and uses a canonical intermediate representation to support most of the recent verification tools, as well as automated sound abstractions that simplify verification of a given hybrid system. TuLiP is a controller synthesis tool for hybrid systems, where given a temporal logic specification to be satisfied for a system (plant) model, TuLiP will find a controller that meets a given specification.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"2672 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133504098","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":"Decentralized disturbance rejection control for large-scale interconnected power system","authors":"Wei Wang, H. Ohmori","doi":"10.1109/CCA.2016.7587819","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587819","url":null,"abstract":"This paper proposes a novel decentralized control strategy for the complex power system with persistent bounded disturbances and nonlinear interconnections. The recursive design method is adopted to construct the decentralized feedback control law. The developed feedback control law improves the disturbance rejection performance of the corresponding closed-loop interconnected system in the sense of L2-gain. Simulation results on a four-machine interconnected power system clearly show the effectiveness of our proposed control strategy.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114176136","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":"SoC regulator and DOB-based load frequency control of a microgrid by coordination of diesel generator and battery storage","authors":"Takuto Hiranaka, H. Shim, T. Namerikawa","doi":"10.1109/CCA.2016.7587823","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587823","url":null,"abstract":"In this paper, the load-frequency control problem of microgrid is discussed. The control is applied to maintain a balance between electric-power demand and supply by controlling the outputs of generators in power systems. However, because of the large-scale introduction of energy from renewable-energy sources, it has become more difficult to maintain this balance. To solve this problem, we consider introducing batteries to microgrid. Therefore, we focus on a microgrid that comprises wind-turbine generators, loads, diesel generators, and batteries. First, we design a generalized plant including the diesel generators and batteries. Then, we apply disturbance observer to decide a reference input to diesel generators and batteries. And, we split the reference input into that for diesel generators and that for batteries considering the differences in the response speeds by applying low-pass filter. Furthermore, we apply SoC regulator for the state of charge of batteries reaching maximum capacity or minimum capacity. Finally, we perform numerical simulations to verify that the control method can suppress the frequency deviations and deviations in the residual capacity of the battery.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133167121","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":"Continuous-time model identification of time-varying systems using non-uniformly sampled data","authors":"Rolf Johansson","doi":"10.1109/CCA.2016.7587913","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587913","url":null,"abstract":"This contribution reviews theory, algorithms, and validation results for system identification of continuous-time models from finite non-uniformly sampled input-output sequences. The algorithms developed are autoregressive methods, and methods of stochastic realization adapted to the continuous-time context. The resulting model can be decomposed into an input-output model and a stochastic innovations model. Using the Riccati equation, we have designed a procedure to provide a reduced-order stochastic model that is minimal with respect to system order as well as the number of stochastic inputs, thereby avoiding several problems appearing in standard application of stochastic realization to the model validation problem. Next, algorithms and validation results are presented for system identification of continuous-time models from finite non-uniformly sampled input-output sequences suitable for parameter tracking of time-varying parameters. The algorithms developed are methods of model identification and stochastic realization adapted to the continuous-time model context using non-uniformly sampled input-output data.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115633327","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":"The impact of resonator geometry on RLG performances","authors":"D. Cuccato, A. Ortolan, A. Beghi, A. Saccon","doi":"10.1109/CCA.2016.7587945","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587945","url":null,"abstract":"In a Ring laser Gyroscope (RLG) the beat note between the two countepropagating modes of the ring resonator is proportional to the rotation rate. Among inertial rotation sensors, RLGs provide the best performances in sensitivity and accuracy available today. Sensitivity and accuracy of high resolution RLGs are still limited by systematic errors, arising from deformations of resonator geometry, modifications of resonator orientation, and non-linear laser dynamics. The geometry and orientation in space associated to the light beam paths are determined by the position and orientation of the optical elements forming the resonator. To enhance RLG accuracy to the level required by the recently proposed General Relativity tests, the stability of the beams geometry and orientation have to be further improved. To this aim, in high sensitivity RLGs, the optical elements relevant for the beams steering are driven by high precision mechanic handlers, and their relative position is measured by dedicated metrology systems. In this paper we review our progresses on the modelization of square ring resonators geometry. We investigate the ring laser open loop response to mirror displacement by a linear perturbation analysis of our model complemented by numerical simulations. Our findings are relevant for the design and alignment of square ring resonators, and pave the way to the development of multivariable automatic control schemes of square ring cavities.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126041113","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":"Parameter-oriented reduction strategies for a thermo-mechanical model of extreme ultraviolet reticles","authors":"Can Bikcora, S. Weiland","doi":"10.1109/CCA.2016.7587961","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587961","url":null,"abstract":"With the demands for shrinkage in feature sizes becoming more than ever, the extreme ultraviolet (EUV) lithography is the route pursued by the industry's leading authorities. Leaving the strive for achieving a high source power aside, we hereby consider one of the most prominent disrupters of imaging quality: heating induced deformation of EUV reticles. To diminish its detrimental effect, a model-based prediction scheme is ideally used for steering certain actuators in an EUV tool. To enable such a solution in practice, computationally fast models are required. Along this direction, we use the POD and DEIM reduction methods on finite-element-based thermal and mechanical equations that relate to a recent geometry where cooling channels are placed nearby the reticle. Several sensor measurements approximating the initial thermal state of this model are treated as parameters, and two parameter-oriented reduction methods are designed which we refer to as local reduction (LR) and decomposed reduction (DR), respectively. The former builds local simplified models based on clustering of the parameters, whereas the latter expands the terms in the model so that the reduction is independent of the parameters. The results indicate that only two sensors are sufficient for an accurate characterization of the initial condition. Furthermore, among the evaluated methods, similar accuracies were observed for various tested scenarios, and therefore, it is concluded that the LR is more suitable for this application due to its less intricate structure.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116933738","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":"Residual vibration reduction of flexible joint systems using a frequency domain trajectory planning algorithm","authors":"M. Ruf","doi":"10.1109/CCA.2016.7588012","DOIUrl":"https://doi.org/10.1109/CCA.2016.7588012","url":null,"abstract":"Fast motions of systems with constrained flexible dynamics often lead to residual vibrations. Established methods for compensating those vibrations such as input-shaping, filtering and feed-forward methods are already available. However, those methods do not explicitly consider input-constraints. As a consequence, they cannot effectively reduce residual vibrations if input-constraints are violated. This depends on the trajectory they are applied on, which is generated by a trajectory planning algorithm. In this paper, a trajectory planning algorithm is introduced which incorporates a residual vibration compensation procedure within the algorithm. In order to minimize the trajectory's excitation of the resonant frequency, a cost function is defined in the frequency domain and input-constraints are considered in the optimization algorithm. Hence, suppression of residual vibrations for fast motions can be achieved. The algorithm is implemented and tested on a robotic manipulator.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116395759","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}
Michael Fleps-Dezasse, Mahmoud M. Ahmed, J. Brembeck, F. Svaricek
{"title":"Experimental evaluation of Linear Parameter-Varying semi-active suspension control","authors":"Michael Fleps-Dezasse, Mahmoud M. Ahmed, J. Brembeck, F. Svaricek","doi":"10.1109/CCA.2016.7587825","DOIUrl":"https://doi.org/10.1109/CCA.2016.7587825","url":null,"abstract":"Semi-active suspensions offer a large potential to improve the trade-off between ride comfort and road-holding compared to passive suspensions. In order to exploit this potential, the suspension control approach should explicitly consider the force limits of the semi-active damper. For this purpose, a Linear Parameter Varying (LPV) plant with a saturation indicator and a saturation transformer parameter is developed. This plant model allows for the synthesis of an LPV controller with guaranteed closed-loop stability and performance. In experiments carried out on a quarter-vehicle test-rig, the performance of the LPV controller is compared to passive suspension configurations and a Skyhook/Groundhook (SH/GH) controller. The results show that the LPV controller achieves a better trade-off between ride comfort and road-holding together with a simultaneous reduction of the suspension motion.","PeriodicalId":301744,"journal":{"name":"2016 IEEE Conference on Control Applications (CCA)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133901707","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}