{"title":"On the stable passive dynamics of quadrupedal running","authors":"I. Poulakakis, E. Papadopoulos, M. Buehler","doi":"10.1109/ROBOT.2003.1241782","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1241782","url":null,"abstract":"In this paper, we study the passive dynamics of quadrupedal bounding, based on a simplified model of our Scout II quadruped robot. Surprisingly, numerical return map studies reveal that passive generation of a large variety of cyclic bounding motion is possible. Most strikingly, local stability analysis shows that the dynamics of the open loop passive system alone can confer stability of the motion. Stability improves at higher speeds, which is in agreement with recent results from biomechanics. These results can be used in developing a general control methodology for legged robots, resulting from the synthesis of feed-forward and feedback models that take advantage of the mechanical system, and might explain the success of simple, open loop bounding controllers on our experimental robot.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"379 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114478679","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":"Enveloping obstacles with hexagonal metamorphic robots","authors":"J. Walter, E. Tsai, N. Amato","doi":"10.1109/ROBOT.2003.1241682","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1241682","url":null,"abstract":"The problem addressed is the distributed reconfiguration of the metamorphic robot system composed of any number of two dimensional robots (modules). The initial configuration we consider is a straight chain of modules, while the goal configuration satisfies a simple admissibility condition. Our reconfiguration strategy depends on finding a contiguous path of cells, called a substrate path that spans the goal configuration. Modules fill in this substrate path and then move along the path to fill in the remainder of the goal without collision or deadlock. In this paper, we address the problem of reconfiguration when a single obstacle is embedded in the goal environment. We introduce a classification for traversable surfaces, which allows for coherence in defining admissibility characteristics for various objects in the hexagonal grid. We present algorithms to 1) determine if an obstacle embedded in the goal fulfills a simple admissibility requirement, 2) include an admissible obstacle in a substrate path, and 3) accomplish distributed reconfiguration.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114767966","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":"Statistical analysis and comparison of questionnaire results of subjective evaluations of seal robot in Japan and UK","authors":"T. Shibata, K. Wada, K. Tanie","doi":"10.1109/ROBOT.2003.1242075","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1242075","url":null,"abstract":"This paper describes research on mental commit robot that seeks a different direction from industrial robot, and that is not so rigidly dependent on objective measures such as accuracy and speed. The main goal of this research is to explore a new area in robotics, with an emphasis on human-robot interaction. In the previous research, we categorized robots into four categories in terms of appearance. Then, we introduced a cat robot and a seal robot, and evaluated them by interviewing many people in Japan. The results showed that physical interaction improved subjective evaluation. Moreover, a priori knowledge of a subject has much influence into subjective interpretation and evaluation of mental commit robot. In this paper, 440 subjects evaluated the seal robot, Paro by questionnaires in an exhibition at Science Museum in London, UK. This paper reports the results of statistical analysis of evaluation data, and compares them with those obtained in Japan.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114813510","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":"Micromanipulation contact transition control by selective focusing and microforce control","authors":"Ge Yang, B. Nelson","doi":"10.1109/ROBOT.2003.1242083","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1242083","url":null,"abstract":"A fundamental requirement of micromanipulation is to control the impact force and subsequently the contact force in the transition of the micromanipulator end-effector from noncontact to contact state. This is especially important in protecting fragile microstructures and preventing undesirable motion. This paper proposes a method of using the integration of selective focusing and microforce control to achieve fast transition control while minimizing impact force. The method is applied to contact transition in microassembly pick-and-place operations. The initial long-range approach motion of the end-effector towards its target is controlled based on focus measures computed from images captured through a microscope. When the end-effector comes into focus near the target, the system switches to microforce control to minimize impact force and to regulate the contact force. An optics model for microscope focusing is proposed to characterize the dynamic behavior of the end-effector images during the approach motion. The connection between this model and the scale-space theory of computer vision is emphasized. Three different focus measures are tested and compared in performance. The proposed method has been experimentally verified to be able to achieve fast transition control with minimal impact force.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115005897","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}
M. Kaneko, T. Kawahara, S. Matsunaga, T. Tsuji, Shinji Tanaka
{"title":"Touching stomach by air","authors":"M. Kaneko, T. Kawahara, S. Matsunaga, T. Tsuji, Shinji Tanaka","doi":"10.1109/ROBOT.2003.1241670","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1241670","url":null,"abstract":"This paper proposes a new endoscope system with an air injection based contact probe capable of measuring the local impedance of the inner surface of stomach. By utilizing air pressure, we can produce an equivalent contact force, which is really advantageous for avoiding any damage for stomach during an examination. A big issue is that there is no way to obtain the applied force to stomach exactly. The key for solving it is the specially designed solenoid valve with the response for more than 500 Hz. The solenoid valve with such a high response allows us to estimate each impedance parameter, even with a reference value. We show experimental system with a couple of interesting results.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114511748","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":"Learning self-organizing maps for navigation in dynamic worlds","authors":"R. Araújo, G. Gouveia, N. Santos","doi":"10.1109/ROBOT.2003.1241773","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1241773","url":null,"abstract":"Mobile robots must be able to build their own maps to navigate in unknown worlds. Expanding a previously proposed method [Rui Araujo et al., April 1999], based on the fuzzy ART neural architecture (FARTNA), this paper introduces a new on-line method for learning maps of dynamic worlds. For this purpose the Prune-Able fuzzy ART neural architecture (PAFARTNA) is introduced. It extends the FARTNA self-organizing neural network to include the ability to selectively perform the following additional operation on recognition categories: remove, directly update spatial span, or forced create. A method is proposed for the perception of object removals, and then integrated with PAFARTNA. Experimental results obtained with a Nomad 200 robot are presented demonstrating the feasibility and effectiveness of the proposed methods.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114677184","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 of all-accelerometer inertial measurement unit for tremor sensing in hand-held microsurgical instrument","authors":"W. T. Ang, P. Khosla, C. Riviere","doi":"10.1109/ROBOT.2003.1241852","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1241852","url":null,"abstract":"We present the design of an all-accelerometer inertial measurement unit (IMU). The IMU forms part of an intelligent hand-held microsurgical instrument that senses its own motion, distinguishes between hand tremor and intended motion, and compensates in real-time the erroneous motion. The new IMU design consists of three miniature dual-axis accelerometers, two of which are housed in a sensor suite at the distal end of the instrument handle, and one located at the proximal end close to the instrument tip. By taking the difference between the accelerometer readings, we decouple the inertial and gravitational accelerations from the rotation-induced (centripetal and tangential) accelerations, hence simplifies the kinematic computation of angular motions. We have shown that the error variance of the Euler orientation parameters /spl theta//sub x/, /spl theta//sub y/ and /spl theta//sub z/ is inversely proportional to the square of the distance between the three sensor locations. Comparing with a conventional three gyros and three accelerometers IMU, the proposed design reduces the standard deviation of the estimates of translational displacements by 29.3% in each principal axis and those of the Euler orientation parameters /spl theta//sub x/, /spl theta//sub y/ and /spl theta//sub z/ by 99.1%, 99.1% and 92.8% respectively.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123474348","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":"From visuo-motor self learning to early imitation-a neural architecture for humanoid learning","authors":"Y. Kuniyoshi, Yasuaki Yorozu, M. Inaba, H. Inoue","doi":"10.1109/ROBOT.2003.1242072","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1242072","url":null,"abstract":"Behavior imitation ability will be a key technology for future human friendly robots. In order to understand the principles and mechanisms of imitation, we take a synthetic cognitive developmental approach, starting with minimum components and create a system that can learn to imitate others. We developed a visuo-motor neural learning system which consists of orientation selective visual movement representation, distributed arm movement representation, and a high-dimensional temporal sequence learning mechanism. The vision and the movement representations model the findings in primate brain, i.e. macaque area MT(or human area V5) and the primary motor area. The learning mechanism is inspired by the finding that there are excessive connections in neonate brain. As our robot explores the visuo-motor self movement patterns, it learns coherent patterns as high-dimensional trajectory attractors. After the learning, a human comes in front of the robot showing arm movements which are similar to the ones in self learning. Although the robot has never seen or programmed to interpret human arm movement, and the detail of visual stimuli are very different, the robot identifies some of the patterns as similar to those in self learning, and responded by generating the previously learned arm movement. In other words, the robot exhibits early imitation ability based on self exploratory learning.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"305 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122116069","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":"Trajectory generation for constant velocity target motion estimation using monocular vision","authors":"E. Frew, S. Rock","doi":"10.1109/ROBOT.2003.1242128","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1242128","url":null,"abstract":"The performance of monocular vision based target tracking is a strong function of camera motion. Without motion, the target estimation problem is unsolvable. By designing the camera path, the best possible estimator performance can be achieved. This paper describes a trajectory design method based on the predicted target state error covariance. This method uses a pyramid, breadth-first search algorithm to generate real-time paths that achieve a minimum uncertainty bound in fixed time or a desired uncertainty bound in minimum time.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122126426","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":"Development of a mobile robot for visually guided handling of material","authors":"T. Tsay, M. Hsu, R. Lin","doi":"10.1109/ROBOT.2003.1242115","DOIUrl":"https://doi.org/10.1109/ROBOT.2003.1242115","url":null,"abstract":"Mobile robots frequently replace humans in handling and transporting wafer carriers in semiconductor production lines. A mobile robot is constructed in this paper. The developed mobile robot is primarily composed of a mobile base, a robot manipulator, and a vision system. Since the guidance control system of the mobile base inevitably causes positioning errors of the mobile base, this study employs the eye-in-hand vision system to provide visual information for controlling the manipulator of the mobile robot to grasp accurately stationary material during pick-and-place operations between a predefined station and the mobile robot. This work further proposes a position-based look-and-move task encoding control strategy for eye-in-hand vision architecture, that maintains all target features in the camera's field of view throughout the visual guiding. Moreover, the manipulator can quickly approach the material and precisely position the end-effector in the desired pose. Numerous techniques are required for implementing such a task, including image enhancement, edge detection, corner and centroid detection, camera model calibration method, robotic hand/eye calibration method, using a camera with controlled zoom and focus, and task encoding scheme. Finally, the theoretical results for the proposed control strategy are experimentally verified on the constructed mobile robot. Specific experimental demonstrations include grasping the target object with different locations on the station and grasping the target object tilted by different angles to the station.","PeriodicalId":315346,"journal":{"name":"2003 IEEE International Conference on Robotics and Automation (Cat. No.03CH37422)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117233864","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}