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Pectoral foil structure and motion discipline of cow-nosed ray as nature prototype is analyzed. A bionic pectoral fin is designed according to the analysis results. Propulsion performance of the bionic fin at sinusoidal motion law is studied experimentally on a towing platform, at the oscillating frequency from 0.2 Hz to 2 Hz and amplitude from 2.5° to 30°. Well driving ability is obtained, and maximal...
This paper proposes two methods for position constrained bilateral control. The constraint is given by coordinate transform and additional compensators or command modification methods are not necessary in these methods. The constraint therefore does not destabilize a system and does not nonlinearize it. A difference of the proposed two methods is priority of tasks. The first one ensures slave position...
In a multi-agent system, a single agent may not be capable of completing complex tasks. Therefore agents are required to form a team to fulfill the task requirements. In this paper an agent model is introduced that facilitates cooperation among agents. A multi-threaded multi-agent simulation framework is designed to test the model. The experimental results demonstrate that the model is significantly...
Robot soccer teams consist of a number of robots each performing a different role within the team. The roles discussed in this paper are: goalie, defender, attacker, supporter and centre. These roles are too often statically assigned to the robots at the start of the game. Knowledge-based techniques can be used to assign these roles dynamically to allow the team to adopt the optimal behaviour for...
This paper investigated the formation control of multi-mobile robots under the environment without obstacles, the feedback linearization is used for the robot, a nonlinear sliding mode controller is proposed in accordance with multi-robot system to coordinate a group of nonholonomic mobile robots so that a desired formation can be achieved. A prescribed trajectory is followed by using sliding mode...
This paper describes robots with object-oriented peripheral modules that are controlled by a personal single board computer (PSBC). In addition, the applications of the PSBC and related peripheral modules are also described.
In order to describe the movement of multi-robot queue, the model of formation is defined in view of relative poses of multiple mobile robots. The idea of switching control is introduced based on leader-following schema. The front point and rear point of the axis of leading robot is determined as reference points by the following robot. The sub-controller is designed corresponding to the reference...
One of the challenges of building a policy management framework is making it flexible enough to handle differences in both policy semantics and enforcement strategies across multiple platforms and application domains. The system must be expressive enough in each application domain to provide the richness needed for interesting policies. It must also provide a simple and flexible enforcement mechanism...
In many mobile robot application, navigation is a critical issues. This paper deals with the localization and building problem in an unknown indoor environment. We propose an exploration based on the use of the sensorial data provided by one CCD camera and odometer system. In this paper, the first part of our study is linked to the problem of Vehicle Model and the algorithm model. The second part...
Reconfigurable robotic systems are made from a large number of independent modules that can be used to form various robot shapes. Consequently the robots have the capabilities to optimize their configurations to suit different tasks and environments. This reconfigurability needs not only appropriate module structures, but also corresponding communication and control systems to coordinate the modulespsila...
We present new techniques for establishing lower bounds in robot motion planning problems. Our scheme is based on path encoding and uses homotopy equivalence classes of paths to encode state. We first apply the method to the shortest path problem in 3 dimensions. The problem is to find the shortest path under an Lp metric (e.g. a euclidean metric) between two points amid polyhedral obstacles. Although...
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