Object transportation using multiple mobile robots: Coupling and decoupling configuration of an object and robots
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초록
This study deals with object transportation using multiple mobile robots. Each robot is assumed to have a mechanism to couple with an object. The mechanism is operated by pushing and pulling forces without an actuator and becomes a free joint after coupling. The transportation operation is conducted as follows. The mobile robots first couple with the object using pushing motions. Then, they transport the object to the goal position. Finally, they decouple from the object using pulling motions after arriving at the destination. In this study, we focus on coupling and decoupling operations and discuss the configurations of the object and robots for coupling and decoupling. First, we formulate a kinematic model and static equilibrium equation for the object and n robots and then show that there exists a configuration, in which the robots can push and pull one another for coupling and decoupling while maintaining static equilibrium. Such a configuration is a singular configuration and is usually regarded as undesirable in terms of motion control. It is demonstrated through numerical examples using two, three, and four robots that the singular configuration is appropriate for coupling and decoupling operations.
Abstract
This study deals with object transportation using multiple mobile robots. Each robot is assumed to have a mechanism to couple with an object. The mechanism is operated by pushing and pulling forces without an actuator and becomes a free joint after coupling. The transportation operation is conducted as follows. The mobile robots first couple with the object using pushing motions. Then, they transport the object to the goal position. Finally, they decouple from the object using pulling motions after arriving at the destination. In this study, we focus on coupling and decoupling operations and discuss the configurations of the object and robots for coupling and decoupling. First, we formulate a kinematic model and static equilibrium equation for the object and n robots and then show that there exists a configuration, in which the robots can push and pull one another for coupling and decoupling while maintaining static equilibrium. Such a configuration is a singular configuration and is usually regarded as undesirable in terms of motion control. It is demonstrated through numerical examples using two, three, and four robots that the singular configuration is appropriate for coupling and decoupling operations.
참고문헌 (15)
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