M. F. Santos, M. F. Silva, V. Vidal, L. Honório, V. M. L. Lopes, L. A. Z. Silva, H. B. Rezende, J. M. S. Ribeiro, A. Cerqueira, A. Pancoti, B. A. Regina
{"title":"Experimental Validation of Quadrotors Angular Stability in a Gyroscopic Test Bench","authors":"M. F. Santos, M. F. Silva, V. Vidal, L. Honório, V. M. L. Lopes, L. A. Z. Silva, H. B. Rezende, J. M. S. Ribeiro, A. Cerqueira, A. Pancoti, B. A. Regina","doi":"10.1109/ICSTCC.2018.8540660","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540660","url":null,"abstract":"This work presents a gyroscopic test bench for under or over-actuated UAVs. In this way, it is possible to perform stability tests and several control loop structures without taking the risk of damages present in field tests, or even accidents with personal injuries. Moreover, the vehicle continues with its respective degrees of freedom for angular stability dynamics (rolling, pitching and yawing), without (or almost no) interference from the test bench, as it does not influence the UAV moments of inertia. It also can be used for didactic purposes, where, through the results presented in graphics and videos, it proved to be easy to build and handled, meeting the minimum safety requirements proposed.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"82 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132005797","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}
C. Lohninger, B. Voglauer, Klaus Matheis-Weiss, M. Kozek
{"title":"Efficient modelling and control design for suppression of pressure oscillations in an industrial condensation process","authors":"C. Lohninger, B. Voglauer, Klaus Matheis-Weiss, M. Kozek","doi":"10.1109/ICSTCC.2018.8540686","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540686","url":null,"abstract":"In this paper, a simple yet versatile modelling approach for sinusoidal pressure oscillations in an industrial multi-stage condensation system and different control schemes for suppression are presented. The investigated condensation system is embedded in an extensive extraction system and is used to separate a hazardous substance out of a gas mixture. The main problem is posed by unknown and unmeasured process disturbances which may ultimately lead to pressure peaks exceeding the ambient pressure. When an over-pressure occurs, the hazardous substance may escape, and a safety shut-down is triggered. A surrogate model, based on observations and the physical motivation that a gas flow contains kinetic and potential energy, is developed. The model is then based on the momentum and the ideal gas equation. The validation shows a good agreement with measurements in the time and frequency domain. To suppress the oscillations and guarantee an under-pressure in the system a linear output feedback controller, an adaptive algorithm for rejection of sinusoidal disturbances and an LQR-Controller with integration of the control error are compared. The simulation shows that the readily implementable linear output feedback control scheme sufficiently suppresses the oscillations and safely keeps the pressure in the under-pressure range.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128754335","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 Identification of an Unmanned Quadcopter Rotor Dynamics using RBF Neural Networks","authors":"Paulin Kantue, J. Pedro","doi":"10.1109/ICSTCC.2018.8540739","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540739","url":null,"abstract":"The unmodelled rotor dynamics in accelerated flight have a negative effect in the robustness and performance of an unmanned quadcopter, which could result in mission failure in adverse conditions or rotor faults. The nonlinear identification of an unmanned quadcopter rotor dynamics is investigated in this paper. The rotor dynamics are considered in terms of a first-order flapping dynamic model with the dynamics estimated using the radial basis function (RBF) neural networks. A RBF structure based on a continuous forward algorithm (CFA) is implemented for the estimation of a longitudinal rotor flapping dynamic coefficient. This was achieved through optimal input design by the maximization of the spectral density function and predicting the resonant frequency response from the RBF output. This was computed at various trim speeds and training data noise levels and compared with a linear model. The prediction accuracy and robustness to noise of the CFA algorithm proved that the proposed approach can result in better understanding of quadcopter flapping dynamic for high fidelity flight controller design.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"150 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116360999","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 Model Predictive Control for N and P removal in wastewater treatment plants","authors":"X. Hongyang, C. Pedret, I. Santín, R. Vilanova","doi":"10.1109/ICSTCC.2018.8540675","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540675","url":null,"abstract":"Due to the complex and non linear character, wastewater treatment process is difficult to be controlled. And the demand for removing the pollutant, especially for nitrogen (N) and phosphorus (P), as well as reducing the cost of wastewater treatment plant (WWTP) is an important research topic. This paper applies PI control and decentralised model predictive control control to the combined phosphorus removal Benchmark Simulation Model 1 (BSMI-P) wastewater treatment process to enhance the P removal. A default control strategy which contains two control loops and is similar to the one given by the original version of BSMI was tested on BSMI-P. In addition, linear models have been identified and model predictive controllers implemented for each one of these loops. The simulation results showed that the MPC controllers are able to the controller performance in all the three weather conditions.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116964024","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. Alvarez-Muñoz, J. Escareño, F. Méndez-Barrios, I. Boussaada, S. Niculescu, D. Nieto-Hern’andez
{"title":"Time-delay Tolerant Control of an Omnidirectional Multi-agent System for Transport Operations","authors":"J. Alvarez-Muñoz, J. Escareño, F. Méndez-Barrios, I. Boussaada, S. Niculescu, D. Nieto-Hern’andez","doi":"10.1109/ICSTCC.2018.8540692","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540692","url":null,"abstract":"This paper proposes a solution regarding the general consensus of a multi-agent time-delay system in order to achieve interactive and transport operations. The multi-agent system consists of a set of omni directional mobile robots equipped with vision based systems and interactive tools. It is well known that the vision-based systems and the communication between agents produce time-delays, causing stability issues for consensus and formation control. The present work deals with a high precision consensus by means of a time-delay tolerant control law. First, the mathematical model of every agent is presented. Then, this dynamic model is extended to the set of robots conforming the multi-agent system. After that, a control law, consisting of a time-delay tolerant strategy allows orientation and position consensus. The formulation of a simple algorithm for orientation and position formations for the set of robots is presented. Finally, simulation results validate the proposed control strategy and compare the results when time-delay is present in the system or not for an object transport scenario.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117224459","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":"Implementation of a home appliance mobile platform based on computer vision: self-charging and mapping","authors":"Florin-Dan Secuianu, C. Lupu","doi":"10.1109/ICSTCC.2018.8540685","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540685","url":null,"abstract":"One of the key features of a fully autonomous mobile robot is represented by the ability to recharge itself with energy. This paper proposes a solution for recharging an autonomous mobile robot with power so that it can perform tasks with little or no human intervention. This paper continues our work on the implementation of a mobile platform based on computer vision. In a previous paper, we implemented the foundation of the platform, in which a mobile robot detected several targets and navigated autonomously between them. We have shown that a small-size computer is perfectly capable of performing multiple tasks such as object detection, processing input data from distance sensors, sending movement commands to electric motors. The charging areas are marked with specific signs that the mobile robot can recognize using computer vision software and specific algorithms. The robot can navigate to such an area, connect to a socket, fully recharge with energy, disconnect and resume its preset activities. The prototype for this study uses in-house developed software based on OpenCV graphic library, Python language, Unix-like operating system - Debian Jessie and low-cost, high performance computer Raspberry Pi 3, model B with a CPU at 1.2 GHz 64bit quad-core ARM, 1GB of RAM, commercial robotic kits, ultrasonic sensors, Raspberry Pi camera, commercial Li-Po rechargeable battery and adaptor, a wireless charging kit, and a digital compass. The paper presents a series of promising results obtained with this structure, which could be used as a platform for future applications in various fields.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114621641","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}
C. Lupu, Cosmin-Constantin Mihai, Florin-Dan Secuianu, C. Petrescu
{"title":"Fast Disturbance Rejection in MIMO Process Based on Algorithms Switching","authors":"C. Lupu, Cosmin-Constantin Mihai, Florin-Dan Secuianu, C. Petrescu","doi":"10.1109/ICSTCC.2018.8540729","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540729","url":null,"abstract":"The restrictions imposed on real-time functioning are sometimes particularly severe and require firm action. At the same time, the design of the control algorithms for perturbations rejection includes a multitude of theoretical and practical solutions that exist in the literature. Here, we can note the methods based on robustification, on algorithms with specific degrees of freedom, etc. The paper presents a method based on the very rapid switching of the control algorithms, proposing at the same time a new switching method. The solutions proposed are tested on an MIMO process in a real time application in the vehicle control area.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126802650","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":"Hyper-Redundant Arm with ER Fluid Based Actuator and Control System","authors":"I. Vladu, V. Stoian","doi":"10.1109/ICSTCC.2018.8540647","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540647","url":null,"abstract":"Hyper-redundant robots of backbone types are generally driven by traction cables, making different curves for different segments in their body. This paper presents the structure of a hyper-redundant robot of backbone type having an electro- rheologhic system for position control. For proper operation, so for bending, we uses a cables system with DC motor-driven. The control system is made with a PIC microcontroller. Modeling the robot's position is done by bending it with cables, combined with locking the desired elements position through the electro- rheological system. The major advantage of this type of drive lies in the fact that the robot modeling can be done with a system with only three cables, the position lock system of an element or segment is relatively simple. Also presented is a variable width signal system with constant amplitude where the duration of the input signal is the control variable. The control system uses a mixed control. We use this controller for control of robot curvature respectively the control of ER valve.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126711897","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":"Second-Order Agents on Ring Digraphs","authors":"S. Parsegov, P. Chebotarev","doi":"10.1109/ICSTCC.2018.8540656","DOIUrl":"https://doi.org/10.1109/ICSTCC.2018.8540656","url":null,"abstract":"The paper addresses the problem of consensus Seeking among second-order linear agents interconnected in a specific ring topology. Unlike the existing results in the field dealing with one-directional digraphs arising in various cyclic pursuit algorithms or two-directional graphs, we focus on the case where some arcs in a two-directional ring graph are dropped in a regular fashion. The derived condition for achieving consensus turns out to be independent of the number of agents in a network.","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126388661","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":"ICSTCC 2018 Committees","authors":"","doi":"10.1109/icstcc.2018.8540750","DOIUrl":"https://doi.org/10.1109/icstcc.2018.8540750","url":null,"abstract":"","PeriodicalId":308427,"journal":{"name":"2018 22nd International Conference on System Theory, Control and Computing (ICSTCC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121706581","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}