This paper presents a modeling method for a Mobile Modular Robot(MMR) which is composed of a mobile platform and a modular manipulator, the kinematics analysis is made for both the mobile platform and the upper manipulator. Then the dynamic equations are formulated considering the nonholonomic constraints and the controller is proposed with both the redundancy resolution and optimization of nul...

This paper presents a path planning technique for a mobile manipulator whose end-effector path is imposed by a given task. The planning is done decoupling the kinematics of the mobile platform and the manipulator, and planning for the former as a normal mobile robot. Two criteria for planning the path were implemented, one minimizing the need to turn the mobile robot and the other minimizing th...

This paper describes the application of behaviour-based control for a mobile manipulation task. It presents a preliminary result in the research into a ‘task-robust’ controller for a service robot, needed when a robot is used in a human-centred environment. The chosen benchmark task is the co-operative carrying of a long object by a mobile manipulator and a human. The human will guide the task,...

Nowadays the size and dimension of mobile manipulators have been decreased for being usable in various regions. This leads several problems such as danger of instability. Therefore, many researches have been done to overcome the problem of overturning of a mobile manipulator. In this paper, an algorithm for increasing the stability of a mobile manipulator is presented based on the optimization ...

This paper presents a computational technique for determining the maximum allowable load of wheeled mobile manipulators for a desired trajectory. Full load motion of mobile manipulators while carrying a load is an important consideration in their application and motion planning. The number of factors limits the maximum allowable loads, which can be achieved by a mobile manipulator during a give...

One of the most important features of the next generation of robots is the mobility and the ability to work in an unstructured environment. Conventional manipulator arms have bounded workspace and are thus appropriate only for some limited tasks. Hence, they need additional devices such as conveyor belts and handling devices in order to perform a task requiring large workspace. A new promising ...

In this paper, we discuss a hierarchical belief space system capable of supporting task planning while simultaneously managing uncertainty in a uniform framework. A demonstration of the approach is conducted with a mobile manipulator performing simple assemblies in unstructured environments.

FSR’99 International Conference on Field and Service Robotics, Pittsburgh, PA, Aug. 1999 Mobile manipulator systems hold promise in many industrial and service applications including assembly, inspection, and work in hazardous environments. The integration of a manipulator and a mobile robot base places special demands on the vehicle’s drive system. For smooth accurate motion and coordination w...

We present a skill for the perception of three-dimensional kinematic structures of rigid articulated bodies with revolute and prismatic joints. The ability to acquire such models autonomously is required for general manipulation in unstructured environments. Experiments on a mobile manipulation platform with realworld objects under varying lighting conditions demonstrate the robustness of the p...

ABSTRACT Two recently developed motion control algorithms for mobile manipulators are applied to an experimental system. The manipulator motions induce significant dynamic interactions with its vehicle and suspension. A conventional fixed-base controller, which typically neglects these dynamic interactions, is shown to lead to poor performance. Both mobile manipulator control algorithms, howeve...