Hossein Mirzanejad, M. M. Tabrizi, A. Fathian, A. Sharifnejad, M. Agheli
{"title":"A New Soft Force Sensor using Blended Silicone-Magnetic powder","authors":"Hossein Mirzanejad, M. M. Tabrizi, A. Fathian, A. Sharifnejad, M. Agheli","doi":"10.1109/ICROM.2017.8466150","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466150","url":null,"abstract":"In this paper, a new soft sensor is introduced in order to measure normal forces for use in soft robotics applications. Soft sensors and actuators usually have high flexible structures and therefore require elements which are compatible with this flexibility. We introduce a new approach to achieve more desired softness and flexibility specifically for soft magnetic force sensors. For this purpose, magnetic powder is used instead of a solid piece of magnet. Therefore, the Hall Effect sensor detects magnetic flux density induced by magnetic powder blended with soft silicone rubber. Using magnetic powder provides flexibility and soft behavior to the sensor. In addition, compared with solid magnet designs, the effective working rang is expanded. Three different structural parameters i.e. powder density, magnetic part diameter and height of the sensor are studied in order to choose the most proper design to get the best performance depending on the expected characteristics behavior for the sensor. It is shown by experimental results that different desired measurement range as well as sensitivity can be achieved by appropriate selection of these three parameters, which makes the sensor usable for many low-cost soft robotics applications.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115023186","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 Robust Approach Toward Kernel-Based Visual Servoing","authors":"M. Parsapour, H. Taghirad","doi":"10.1109/ICROM.2017.8466227","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466227","url":null,"abstract":"We introduce a robust controller for kernel-based visual servoing systems. In such systems, visual features are sum of weighted-image intensities via smooth kernel functions. This information along with its derivative are input to the controller in which we have developed a sliding mode approach to generate system commands. In vision-based systems, image uncertainties affect the tracking performance and stability, and the target object may get out of the field of view. Unless considerable image uncertainties appear, such systems are able to track the object within desired precision. Hence, we have investigated the effect of the image noise as the main source of uncertainty, and encapsulated its characteristics in a proper representation. In order to fulfill the sliding condition, some bounds over image uncertainty and tracking errors are considered, and the controller gains are tuned online to keep the tracking error bounded. An application of the proposed method is experimentally tested on an industrial robot.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114662401","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 Contact Models for Space Manipulators Capturing Free-Floating Objects","authors":"Ashkan Kiani, S. Ali, A. Moosavian, P. Zarafshan","doi":"10.1109/ICROM.2017.8466221","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466221","url":null,"abstract":"This paper presents a comparative study of various existing continuous contact models for impact phase between space manipulator and free-floating target. Contact and impact are always present in space robotic missions that occur inevitably and frequently like the capture operation scenario. Due to the fact that the impact might cause damage or failure in space missions, the necessary precision should be taken into consideration so as to prevent undesired forces. To appraise accurately the produced forces, the authors employ various contact and impact models, including linear and nonlinear in the same situation in order to examine impact between space manipulator and target. Then, in order to draw a comparison between the proposed models for investigating the potential effects on manipulator joints and robot's base as well as target, the MATLAB simulations are done and the results are verified with MSC ADAMS software. The simulation results indicate the main differences of various models that can provide useful information for designing the impact controller.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129808813","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":"Control and Residual Vibration Suppression of a Cable-Suspended Parallel Robot with Elastic Cables","authors":"M. Yousefzadeh, H. Tourajizadeh","doi":"10.1109/ICROM.2017.8466223","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466223","url":null,"abstract":"The control of flexible cable-driven parallel robots usually requires not only the feedback from the joints, but the feedback from the end-effector pose or cable tension. This paper presents a new approach for reducing the vibration of flexible cable-suspended robots, using only the feedback from the joints. The dynamic equations of a 6DOF cable-suspended parallel robot with elastic cables are presented. The feedback linearization method based on the rigid model of the system is considered for the slow dynamic movement of the system. In order to reduce the vibration caused by the cable flexibility, a filtration method is employed to prevent excitation of natural modes. Thus, a combination of feedback linearization together with input shaping is employed in this paper to control the spatial cable robot with elastic cables. Simulation results demonstrate the effectiveness of the proposed approach in reducing the end-effector vibration by 92.1 % in the translational motion.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129305091","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}
S. Samadi, Aghil Yusefi Koma, M. Zakerzadeh, F. N. Heravi
{"title":"Control an SMA-actuated rotary actuator by fractional order PID controller","authors":"S. Samadi, Aghil Yusefi Koma, M. Zakerzadeh, F. N. Heravi","doi":"10.1109/ICROM.2017.8466199","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466199","url":null,"abstract":"The purpose of this paper is to design an appropriate controller for a rotary actuator actuated by Shape Memory Alloy (SMA) wires. The actuator is designed in such a way to be able to rotate in both clockwise and counterclockwise directions using a pair of SMA wires installed on it. The SMA wire is modeled by the Brinson model. Also dynamic and kinematic models of the system are considered in simulation. The convection coefficient of heat transfer equation is resulted from simulating the model and identifying input-output data of the system. According to the nonlinear behavior of the system and due to the nonlinearity of the SMA wires, a Fractional Order PID (FOPID) as a nonlinear controller is designed. The simulation results of trajectory tracking control for a reference input is compared with ones of a traditional PID controller. The better performance of the FOIPD controller with respect to PID controller is stablished.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123127962","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}
Mojtaba Esfandiari, Soroush Sadeghnejad, F. Farahmand, G. Vosoughi
{"title":"Robust Nonlinear Neural Network-Based Control of a Haptic Interaction with an Admittance Type Virtual Environment","authors":"Mojtaba Esfandiari, Soroush Sadeghnejad, F. Farahmand, G. Vosoughi","doi":"10.1109/ICROM.2017.8466196","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466196","url":null,"abstract":"For simulating the surgical procedures in a virtual environment, it is necessary to propose a suitable virtual environment model which can reflect the real physical tool-tissue interaction behavior and a proper human user interface appropriate dynamic model. In this study, a linear Kelvin-Voigt and a nonlinear Hunt-Crossley models have been utilized to describe human hand dynamics during interaction with a haptic interface. Using the Lyapunov stability criteria, an adaptive neural network based controller being designed for guaranteeing the stability of the entire system, considering a nonlinear model for the environment, an inertia for a virtual tool, a constant time delay for data transforming from environment to the operator's side, and external disturbances. Results show that even if both hand models are stable in the sense of Lyapunov stability criteria, nevertheless, the nonlinear Hunt-Crossley model is less sensitive to the hand stiffness escalation and is more transparent than the linear Kelvin-Voigt model, especially in the high-frequency input forces.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116224393","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":"Optimum mechanism for rehabilitation of fingers","authors":"R. Yekta, H. Zohoor, Hooman Shirzadi","doi":"10.1109/ICROM.2017.8466138","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466138","url":null,"abstract":"Nowadays, with the advancement of technology, humans are looking for ways to cure various diseases. Meanwhile, musculoskeletal injuries usually have a long treatment period. Therefore, in recent years, Researchers working one exoskeleton with rehabilitation application which conduct physiotherapy tasks. In current study, a portable two degree of freedom hand exoskeleton is designed which its mechanism is a combination of cable and link mechanism, MCP11Metacarpophalangeal_ joint between metacarpal and proximal phalanges_ joints move by link mechanism, DIP22Distal interphalangeal_ joint between proximal phalanges and middle phalanges_ and PIP33Proximal interphalangeal _ joint between middle phalanges and distal phalanges_ joints move by cable mechanism and Pronation movement is considered for thumb. Link mechanisms are designed by optimization method, by comparing the optimization results of different mechanisms. The 4-bar mechanism is the best choice which its maximum error equal to 3.95 degrees.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116718882","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":"Optimal Kinematic Design of a Robotic Platform for Intraocular Surgeries","authors":"Behnam Varmaghani, M. Khosravi, A. Molaei","doi":"10.1109/ICROM.2017.8466185","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466185","url":null,"abstract":"One of the current application of robotics is for robotically assisted minimally invasive surgeries, such as vitreoretinal eye operations. This paper introduces a new robot with novel structure for eye surgeries that consists of a linear mechanism coupled to a parallelogram based remote center of motion mechanism capable of orienting surgical instrument about a fixed point. To couple the linear mechanism to the parallelogram mechanism there are some options. The goal of this paper is to determine an optimum kinematic structure for the robot, having different coupling configuration of linear mechanism and parallelogram. Considering dexterity and compactness criteria, a cost function is introduced for the optimization problem which is performed using multi-criteria genetic algorithm optimization method.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125126227","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}
Masoud Ghanbari, Mohammadreza Mousavi, S. A. A. Moosavian, A. Nasr, P. Zarafshan
{"title":"Experimental Analysis of an Optimal Redundancy Resolution Scheme in a Cable-Driven Parallel Robot","authors":"Masoud Ghanbari, Mohammadreza Mousavi, S. A. A. Moosavian, A. Nasr, P. Zarafshan","doi":"10.1109/ICROM.2017.8466147","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466147","url":null,"abstract":"This paper addresses the challenge of redundancy resolution in parallel cable robots. Redundancy resolution leads in infinite solutions for tension distribution in cables and hence, force distribution has so far turned into an optimization problem in this class of robots. Therefore, the purpose of this work is to propose a method to optimize the force distribution in cables. In the proposed method, the null space of structure matrix is mapped into the joint space in such a way that all actuators remain in an optimal compromission of actuator forces. Investigation of tension distribution along the cables requires an effective modeling of cables. The proposed algorithm is evaluated within an experimental study on the RoboCab, a cable-driven parallel robot. Results demonstrate the ability of the algorithm to keep the tensions within the desired interval while maintaining the optimality. It is derived that this algorithm can be applied as a force estimator in similar applications.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125338166","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}
I. Sharifi, H. Talebi, S. A. R. Mousavi, S. Shemshaki, M. Tavakoli
{"title":"Haptic Tele-cooperation of Multiple Robots","authors":"I. Sharifi, H. Talebi, S. A. R. Mousavi, S. Shemshaki, M. Tavakoli","doi":"10.1109/ICROM.2017.8466205","DOIUrl":"https://doi.org/10.1109/ICROM.2017.8466205","url":null,"abstract":"In this paper, a novel haptic tele-cooperation control scheme for a system consisting of multiple manipulators interacting with a physical or virtual object is proposed. The contact force between each manipulator and the object is decomposed into two independent forces, one of which is related to grasping the object and the other is related to the motion of the object including its interaction with the environment it is in. The Lyapunov's direct method is used for designing and stability analysis of the proposed controller. As a case study, the problem of robotic tele-rehabilitation is investigated where multiple human operators (e.g., one or more therapists, patients, and trainees in a tele-rehabilitation setting) control their user interfaces in order to tele-cooperatively manipulate an object in a virtual environment. Experimental results confirm the performance and effectiveness of the proposed control methodology.","PeriodicalId":166992,"journal":{"name":"2017 5th RSI International Conference on Robotics and Mechatronics (ICRoM)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131640582","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}