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For biped pole-climbing robots (BiPCRs), footholds, indicating a sequence of discrete gripping points from the start to the goal, are necessary for travelling in trussed environments. Graspable region in each climbing cycle is the valuable priori knowledge for consideration of selecting specific grasping point. However, how to evaluate all the grasps within the graspable region so as to provide a...
The design and evaluation of a new compliant microgripper is reported in this paper on the basis of a dissymmetric mechanism. This structure has two parallelogram mechanisms which enable the generation of purely translational motion of the gripper tips. It is desirable for micromanipulation and microassembly tasks. Unlike the traditional pure-translation grippers, the presented one has a simple architecture...
SPL (Single Port Laparoscopy) might generate better surgical outcomes than multi-port laparoscopy. Hence it draws continuous attentions in the past several years. Due to its operative difficulties, several robotic systems were constructed to help surgeons with the surgical manipulation tasks. The SURS (SJTU Unfoldable Robotic System) for SPL is then proposed, aiming at introducing several improvements...
Minimally invasive robotic surgery (MIRS), compared to open surgery and traditional minimally invasive surgery, has advantages especially for patients and surgeons. In MIRS the surgeon's capabilities are extended for kinds of dexterous instruments, and surgeons could perform precise and dexterous movements which are difficult to carry out by means of rigid instruments. In this paper, the design of...
This paper reports the development of a new jack robot. The jack robot consists of two crawler vehicles connected by 3-DOF joint mechanism which is capable of posture change, constructing a thin structure to enable it to enter narrow space, as well as high mobility in disaster sites and adaptability to irregular terrain. An electric jack mechanism and a multi-DOF manipulator are equipped in the front...
In this paper, the estimation of the grasping torque of robotic forceps without the use of a force/torque sensor is discussed. To estimate the grasping torque when the robotic forceps driven by a rotary motor with a reduction gear grasps an object, a novel robust reaction torque observer is proposed. The robust reaction torque observer is developed according to the following steps. First, cancellation...
In this paper, the design of a new compliant two-axis PZT actuated gripper is proposed based on flexure mechanisms. Its uniqueness is that both of the two gripper jaws can achieve two degree-of-freedom (DOF) movement. A lever structure is designed to meet the requirement of larger displacement due to the stroke limitation of the actuator. The gripper parameters are optimized by using genetic algorithm...
In order to perform useful tasks, a service robot needs to manipulate objects in its environment. In this paper, we propose a method for experimental evaluation of the suitability of a robotic hand for grasping tasks in service robotics. The method is applied to the Schunk 5-Finger Gripping Hand, which is a mechatronic gripper designed for service robots. During evaluation, it is shown, that it is...
A space-saving end-effector is designed for small scale manipulator in this paper. The end-effector is equipped with capture and actuation transmission capabilities. Two subsystems are highly integrated systems of mechanics, electronics and sensors. A trefoil shaped capture system is developed for closed envelop. The worm shaft and worm wheels are adopted for the self-locking property, and they are...
This paper focuses on the design of a gripper that can grasp objects with shape, size and pose uncertainty. Rather than a dexterous hand with multiple actuators and sensors, a passively adaptive gripper made of soft material can conform to various objects by using compliance. In this paper, we present a novel design methodology for a passively adaptive gripper by employing a level-set-based topology...
A robot that can fluently hand over objects to people can be useful in many applications. In an effort to develop a fluent robot-to-human handover system, this work investigates people's behavioural responses to a robot that hands over objects to them while using different types of gaze cues. In our previous work, we found empirical evidence that the use of a robot's head gaze can affect a person's...
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