Cristian Perfumo, J. Braslavsky, J. Ward, E. Kofman
{"title":"An analytical characterisation of cold-load pickup oscillations in thermostatically controlled loads","authors":"Cristian Perfumo, J. Braslavsky, J. Ward, E. Kofman","doi":"10.1109/AUCC.2013.6697272","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697272","url":null,"abstract":"Large groups of thermostatically controlled loads can be controlled to achieve the necessary balance between generation and demand in power networks. When a significant portion of a population of thermostatically controlled loads is forced to change their on-off state simultaneously, the aggregate power demand of such population presents large, underdamped oscillations, a well-known phenomenon referred to by power utilities as “cold-load pickup”. Characterising these oscillations and, in general, the aggregate dynamics of the population facilitates mathematical analysis and control design. In this paper we present a stochastic model for the power response and derive simple expressions for the period and envelope of the oscillations.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134195227","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}
A. Jazlan, V. Sreeram, R. Togneri, Wail A. H. Mousa
{"title":"A review on reduced order approximation for digital filters with complex coefficients using model reduction","authors":"A. Jazlan, V. Sreeram, R. Togneri, Wail A. H. Mousa","doi":"10.1109/AUCC.2013.6697251","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697251","url":null,"abstract":"This paper provides a review accompanied with examples regarding the usage of four basic discrete time model reduction techniques namely Balanced Truncation, Hankel Optimal Approximation, Impulse Response Gramians and Least Squares for the purpose of approximating an FIR digital filter with complex coefficients by its equivalent reduced order IIR digital filter. Simulation results indicate that stable reduced order IIR filters approximants with computational savings can be obtained using all the four techniques. However for a specified order, some model reduction techniques result in reduced order models which better approximate the original FIR digital filter compared to other techniques. The criteria used for comparison between the performances of the four model reduction algorithms were passband magnitude root mean squared error (RMSE) and computational cost. Two numerical examples are provided to demonstrate the application of model reduction techniques for complex co efficient filters and to compare the performances.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131162151","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":"Global tracking control of quadrotor VTOL aircraft in three dimensional space","authors":"K. D. Do, J. Paxman","doi":"10.1109/AUCC.2013.6697243","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697243","url":null,"abstract":"This paper presents a new method for the design of controllers for quadrotor vertical take-off and landing (VTOL) aircraft which globally asymptotically track reference trajectories in three dimensional space. Roll and pitch angles plus the total thrust are considered immediate controls to track references in position and yaw angle of the aircraft. The control design is based on the newly introduced one-step ahead backstepping, standard backstepping and Lyapunov's direct methods. A combination of Euler angles and unit-quaternions are used to represent the aircraft attitude and angular velocities. The results are illustrated with simulations.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133989114","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":"Rapid parameter identification for an electromechanical brake","authors":"Chih Feng Lee, C. Manzie","doi":"10.1109/AUCC.2013.6697305","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697305","url":null,"abstract":"A rapid parameter identification procedure for a prototype automotive electromechanical brake is proposed, which is intended to support post-production quality control checks and quick model-based controller tunings. Instead of using a few different experimental manoeuvres that isolate the identification of certain sets of model parameters, an experiment optimisation is performed to single out the best trajectory that facilitates the identification of the whole sets of parameters while minimising covariance in the estimates. Utilising the measurements obtained from the optimal experimental design, both output error method and prediction error method are employed to estimate the parameters, and their estimation accuracy and evaluation speed are compared. Experimental results show that the proposed method has reduced the time required for experiments significantly with improved estimation accuracy.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115942183","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":"Energy-sorted Prony analysis for identification of dominant low frequency oscillations","authors":"V. Patel, S. Bhil, Faruk Kazi, Sushama Wagh","doi":"10.1109/AUCC.2013.6697252","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697252","url":null,"abstract":"In modern power system, the large size areas are interconnected for better power pooling that results in increased system inertia. However, this makes power to flow over long distances and pushing tie lines to operate closer to their maximum capacity. Operating tie lines closer to maximum capacity increases the possibility of inter-area oscillations (0.1-1 Hz) between two areas and is dominating near high load density area. The modern power system with growing interconnection creates more challenges in inter-area stability analysis. This paper proposes energy-sorted Prony method for online identification of dominant modes corresponding to Low Frequency Electromechanical Oscillations (LFEOs) in highly interconnected power system using Phasor Measurement Unit (PMU) data. The proposed method overcomes the disadvantage of higher false alarm rate of basic Prony method. This disadvantage is due to trivial modes that get introduced because of higher order system used in basic Prony method. The proposed method introduces a new methodology that uses the energy-sorted Prony that calculates the energy of all modes and sorts them according to energy content, this reduces the higher false alarm rate. To verify the effectiveness of the proposed method, a test signal and a two-area, four-machine system are used and the simulated results are presented.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127707426","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":"Triangulation-based path planning for patrolling by a mobile robot","authors":"Vatana An, Z. Qu","doi":"10.1109/AUCC.2013.6697270","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697270","url":null,"abstract":"This paper addresses a systematic coverage planning with a circular sensor mobile robot, having kinematic and dynamic constraints. The static or dynamic objects in the area of interest are also assumed to be circular. Our approach, unlike existing approaches published in literature, allows local and global coverage optimization analytically, in terms of minimal distance-path or energy consumptions [1-9]. Our approach follows six steps. First, given an arbitrary number of statically circular objects in an area of interest, apply the Delaunay Triangulation Method. Second, find the minimum number of visible polygon in each triangle, face, or triangulated-face found in Step One. Third, apply the Novel Circular Waypoint Coverage Placement Algorithm (CWCP) to find the minimum number of waypoints in each face. Fourth, generate a tour by applying the nearest neighbor Traveling Salesman's algorithm (TSP) to link the waypoints found in Step 3. Fifth, apply cublic Spline interpolation to make the tour continuous and differentiable. Sixth, apply the Trajectory Planning Technique to steer the mobile robot from a given arbitrary position and orientation to the desired position and orientation, the waypoints found in Step Three.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130353917","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 of (integral) input-to-state stable interconnected nonlinear systems via qualitative equivalences","authors":"C. Kellett, P. Dower","doi":"10.1109/AUCC.2013.6697245","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697245","url":null,"abstract":"The input-to-state stability (ISS) framework has proven successful for analysing interconnections of ISS and integral ISS systems. We present several new sufficient conditions for the stability of interconnected systems derived by examining qualitatively equivalent formulations of the underlying stability properties.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129668603","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}
Hanif Tahersima, Mohammadjafar Saleh, Akram Mesgarisohani, Mohammad H. Tahersima
{"title":"Design of stable model reference adaptive system via Lyapunov rule for control of a chemical reactor","authors":"Hanif Tahersima, Mohammadjafar Saleh, Akram Mesgarisohani, Mohammad H. Tahersima","doi":"10.1109/AUCC.2013.6697297","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697297","url":null,"abstract":"In this paper, two model reference adaptive control strategy including MIT rule and Lyapunov rule are used to design iterative learning controllers for a chemical-reactor system with uncertain parameters, initial output resetting error and input disturbance. The learning controller compensates for the unknown parameters, uncertainties, and nonlinearity using adaptation law which updates control parameters. It is shown that the internal signals remain bounded if we use a Lyapunov base algorithm, but the algorithm via MIT rule can!t guarantee the stability of system in all conditions. The output tracking error will converge to a profile which can be tuned by design parameters and the convergence speed is improved if the adaptation gain is large. The proposed control algorithm was simulated using MATLAB / Simulink software package to validate the performance of designed algorithm.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125866531","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":"Guaranteed cost tracking for uncertain coupled multi-agent systems using consensus over a directed graph","authors":"Yi Cheng, V. Ugrinovskii, G. Wen","doi":"10.1109/AUCC.2013.6697302","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697302","url":null,"abstract":"This paper considers the leader-follower control problem for a linear multi-agent system with directed communication topology and linear nonidentical uncertain coupling subject to integral quadratic constraints (IQCs). A consensus-type control protocol is proposed based on each agent's states relative to its neighbors and leader's state relative to agents which observe the leader. A sufficient condition is obtained by overbounding the cost function which guarantees a suboptimal bound on the system consensus control and tracking performance. The effectiveness of the proposed method is demonstrated using a simulation example.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131694827","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":"Coherent-classical estimation for quantum linear systems","authors":"I. Petersen","doi":"10.1109/AUCC.2013.6697322","DOIUrl":"https://doi.org/10.1109/AUCC.2013.6697322","url":null,"abstract":"This paper introduces a problem of coherent-classical estimation for a class of linear quantum systems. In this problem, the estimator is a mixed quantum-classical system which produces a classical estimate of a system variable. The coherent-classical estimator may also involve coherent feedback. An example involving optical squeezers is given to illustrate the efficacy of this idea.","PeriodicalId":177490,"journal":{"name":"2013 Australian Control Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130210200","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}