{"title":"Coverage control considering unknown moving obstacles avoidance","authors":"Marzieh Kooshkbaghi, F. Abdollahi","doi":"10.1109/ICROM.2014.6990882","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990882","url":null,"abstract":"This paper presents a new approach for coverage an environment in the presence of unknown moving obstacles. A time varying density function is proposed which represents the importance of each point and causes system to avoid collision with obstacles. A control law is presented to make agents follow the density function and avoid unknown moving obstacles while they provide the optimal coverage. The proposed algorithm is decentralized and less computationally expensive comparing to the previous related approaches.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122167644","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":"Online time-optimal trajectory planning in dynamic workspace of cable suspended robots","authors":"A. Sharifi, H. Taghirad","doi":"10.1109/ICROM.2014.6990907","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990907","url":null,"abstract":"This paper presents a method for online trajectory planning of cable suspended robots. A three degrees-of-freedom spatial cable robot is studied in this analysis. By deriving dynamic model of the robot, cable force restrictions will induce a set of algebraic inequalities in dynamic equations. Direction of required tracking acceleration reveals feasible motion of the robot, which guarantees non-violation of cable force bilateral bounds. Required tracking acceleration is in the direction of instantaneous minus desired velocity vectors with specified magnitude. Furthermore, alternative recipes are employed to decrease negative impacts of unwanted inputs and applying actuator constraints in trajectory planning. Finally, several simulations are presented to demonstrate success of the method. Proposed approach can be used in online trajectory tracking for all cable-driven parallel suspended robots akin to what is realized for the presented three degrees-of-freedom robot.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123958116","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":"Robust output feedback control for a class of nonlinear systems","authors":"M. Homayounzade, M. Keshmiri","doi":"10.1109/ICROM.2014.6990992","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990992","url":null,"abstract":"This paper investigates the problem of robust output feedback stabilization for a family of uncertain nonlinear systems. The proposed method contemplates uncertainties and results in asymptotic stability of system errors. The proposed method relaxes the debility of existing researches where the system nonlinearities are assumed to be bounded by a function of system output. In this note, the system nonlinearities under consideration are required to be bounded by a known function of state (not the system output), additionally no restrictive assumption is made on the system uncertainties. As some examples, the method is applied to two different control systems: the output feedback control of an atomic force microscopy as an example of chaotic systems; and the speed control of DC motors with only measurements of the armature current (not the shaft speed).","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127196859","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":"Design and impelmentation of a speaker verification system using i-vector and Support Vector Machines","authors":"A. Barghi, H. Bayani","doi":"10.1109/ICROM.2014.6990940","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990940","url":null,"abstract":"In the recent years, design of robust and effective speaker verification algorithms has attracted significant research effort from academic and commercial institutions. Speaker verification is a procedure that uses voice properties to prove the identity of person. Speaker verification solutions offer a highly accurate and efficient method of authenticating a person's identity by analyzing his/her voice. It is widely believed that speaker verification systems perform better when there is sufficient background training data to deal with nuisance effects of transmission channels. For some applications however, training data from the same type of sound environment is scarce, whereas a considerable amount of data from a different type of environment is available. This paper, presents a new algorithm for text-independent speaker verification systems based on the extraction of parameters (i-vectors) model. Support Vector Machines is used as a classifier and the model is trained and tested using data of 100 human voices. Evaluation of the data shows acceptable performance of the implemented algorithm. Also implementation of this algorithm using HM 2007 board is part this work. All designed circuits for the latter are presented and results of the trained algorithm mentioned.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"2006 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127486230","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":"Fast object tracking with long-term occlusions handling in dynamic scenes","authors":"M. A. Bagherzadeh, M. Yazdi","doi":"10.1109/ICROM.2014.6991006","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6991006","url":null,"abstract":"In this paper, we present a simple yet fast and robust long-term tracking algorithm of arbitrary objects, where the object may become occluded or leave-the-view in a video stream, which exploits the Mean-Shift (MS), appearance model and saliency map for visual tracking. The Fast Fourier Transform is adopted for saliency detection in this work. The proposed Mean-Shift and Saliency Detection Tracker (MSDT) algorithm runs in real-time and numerous experimental results on several challenging image sequences demonstrate that the proposed tracking framework more favorable performance than the state-of-the-art methods in terms of accuracy, efficiency and robustness.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130003581","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}
Mostafa Rahimi Dizadji, M. Yazdi, M. A. Shirzi, Ziba Gharehnazifam
{"title":"Fuzzy supervisory assisted impedance control to reduce collision impact","authors":"Mostafa Rahimi Dizadji, M. Yazdi, M. A. Shirzi, Ziba Gharehnazifam","doi":"10.1109/ICROM.2014.6991012","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6991012","url":null,"abstract":"Under any abnormal loading on the manipulator end-effector, instability in motion and secondary damages are to be expected. We study a novel approach for active control of the robot manipulator trajectory within and after the impulsive loading caused by collision. Here we have adopted the position-based impedance controller as a force control strategy, inspiring human reaction against the sudden and impulsive loadings. The approach is to issue a new position command along the impact direction and routing smoothed trajectory just after the impact loading. Due to variant properties of impact and to translate human reactions amid impact interval, fuzzy logic-based supervisory system is utilized to modify impedance parameters. Fuzzy rule-based and inference system are defined and resulted control surfaces are illustrated. Finally the response of the system is compared with the case without the proposed controller in the overall scheme. The result shows significant increase in stability and decrease in torque dissipation and therefore, a reasonable reduction in collision impact.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130769422","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":"A full bio-inspired bipedal gait locomotion system","authors":"M. Abedi, M. Moghaddam, S. M. Firoozabadi","doi":"10.1109/ICROM.2014.6990897","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990897","url":null,"abstract":"Modeling the biped gait locomotion is an attractive subject in various fields of study. Thus far, several types of models are proposed in the literature to generate the stable and continuous walking cycles. These methods have a vast application in controlling the limbs of humanoid and bipedal robots. However, these approaches are not suitable for describing the human locomotion. This is for their dissimilarities to the human neuromuscular systems. Due to this deficiency, in this paper a new model is presented for bipedal gait that completely inspires by human neural controlling system. The major challenges of this model have been generation of rhythmic motion and coordination between the legs. The biological researches proved that these issues are accomplished in human central nervous system (CNS) by the central pattern generator (CPG) together with the neural reflexes. Thus, a two level half center CPG is used for producing the periodic movements in the leg. Further, for keeping the coordination, a Ia reflex reversal is employed that biologists confirm that this pathway regularly exist in the human CNS. The simulations showed that this plan well generates the stable gait patterns in addition to have coincidence to the human neuromuscular system.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126349918","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":"Automated synthesis of optimal controller using multi-objective genetic programming for two-mass-spring system","authors":"I. Gholaminezhad, A. Jamali, Hirad Assimi","doi":"10.1109/ICROM.2014.6990874","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990874","url":null,"abstract":"There are much research effort in the literature using genetic programming as an efficient tool for design of controllers for industrial systems. In this paper, multi-objective uniform-diversity genetic programming (MUGP) is used for automated synthesis of both structure and parameter tuning of optimal controllers as a many-objective optimization problem. In the proposed evolutionary design methodology, each candidate controller illustrated by a transfer function, whose optimal structure and parameters, obtained based on performance optimization of each candidate controller. The performance indices of each controller are treated as separate objective functions, and thus solved using the multi-objective method of this work. A two-mass-spring system is considered to show the efficiency of the proposed method using performance optimization of open loop and closed loop control system characteristics. The results show that the proposed method is a computationally efficient framework compared to other methods in the literature for automatically designing both structure and parameter tuning of optimal controllers.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121179105","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":"Adaptive position/force control of robot manipulators with force estimation","authors":"M. Homayounzade, M. Keshmiri","doi":"10.1109/ICROM.2014.6990991","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6990991","url":null,"abstract":"In this paper, we design an adaptive position/force controller for robot manipulators during constrained motion. The proposed controller can compensate for parametric uncertainties while only requiring the measurements of the position and velocity of robot arms, but not the measurements of forces at contact points. A disturbance observer is designed to estimate the constraint forces. The control method results in semiglobal asymptotic tracking performance for the joint position and bounded tracking performance for the interaction force, also the controller provides proper estimate of constraint forces. It is shown mathematically that the error of tracking desired constraint force can be decreased sufficiently by increasing the control gains. The effectiveness of the proposed method is investigated through the numerical simulation for a two-degrees-of-freedom robot manipulator acting on a horizontal worktable.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124930882","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":"Gait analysis of walking with Scottish Rite orthosis","authors":"Mahboubeh Keyvanara, M. Sadigh, M. Karimi","doi":"10.1109/ICROM.2014.6991016","DOIUrl":"https://doi.org/10.1109/ICROM.2014.6991016","url":null,"abstract":"Legg-Calve-Perthes Disease is a disorder involving the closure of the blood supply of the femoral head, resulting in the hip bone turning black. The deformity of femoral head occurs as a result of hip joint irritability and this depends on the severity of the disease. Treatment methods for Perthes disease are divided into operative and non-operative fields, where in the non-operative field different orthosis are prescribed. These orthosis are designed based on the idea of reducing the stress applied on the hip joint; the most famous one called Scottish Rite orthosis. To facilitate study of effect of different orthosis and their design parameters on the forces applied to the hip joint, a mathematical model of such patients during walking would be useful. The prerequisite of such model is the knowledge of gait performance of the patients using it and also the perception of the effects this orthosis has on the walking pattern of these patients. To this end, an analysis of the gait performance is given here. This analysis will then be useful in a path planning procedure. For the analysis to take place a Gait Analyzing System that uses QTM software to capture motions and also a Visual 3D software is used.","PeriodicalId":177375,"journal":{"name":"2014 Second RSI/ISM International Conference on Robotics and Mechatronics (ICRoM)","volume":"73 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116675288","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}