Among all the articles of human robots there are very few dedicated to the double support phase. A lot of researches consider this phase as an instantaneous transition between the single support phases for one leg to another in the biped gait. So we decided to focus our work in this direction and study the overactuated system that arises from the sub-actuated free-flyer humanoid with restrictio...

We propose a constructive control design for stabilization of non-periodic trajectories of underactuated robots. An important example of such a system is an underactuated “dynamic walking” biped robot traversing rough or uneven terrain. The stabilization problem is inherently challenging due to the nonlinearity, open-loop instability, hybrid (impact) dynamics, and target motions which are not k...

in this paper an energy dissipation rate control (edrc) method is introduced, which could provide stable walking or running gaits for legged robots. this method is realized by developing a semi-analytical pattern generation approach for a robot during each single support phase (ssp). as yet, several control methods based on passive dynamic walking have been proposed by researchers to provide an...

Recently, many studies have focused on the development of humanoid biped robot platforms. Some of the well-known humanoid robots are Honda’s humanoid robots, the WABIAN series of robots from Waseda University, Partner, QRIO, H6 and H7, HRP and JOHNNIE. Given that humanoids are complex, expensive and unstable, designers face difficulties in constructing the mechanical body, integrating the hardw...

Studies on biped robots have attracted interest due to such problems as inherent poor stability and the cooperation of a large degree of freedom. Furthermore, recent advanced technology, including hardware and software, allows these problems to be tackled, accelerating the interest. Actually, many sophisticated biped robots have already been developed that have successfully achieved such variou...

We have developed a simulator of humanoid robots and a controller of their whole body motions in MITI’s Humanoid Robotics Project. The simulator can emulate the dynamics of the motions of the robots whose structure may vary, and generate a sequence of the £elds of view from the eyes of the robot according to the motions. The structure-varying system is managed by introducing virtual links. The ...

Reactivity to unforeseen disturbances is one of the most crucial characteristics for biped robots walk robustly in real world. Nevertheless, conventional walking methods generally have limited capability generating rapid reactions disturbances, because these it necessary wait until end preplanned time period proceed next phase. In this study, improve reactivity, we develop an event-based finite...

It is easier for bipedal robots to exist in a human oriented environment than for other types of robots. Furthermore, dynamic walking is more efficient than static walking. For a biped robot achieve dynamic balance while walking, a dynamic gait must be developed. Two different approaches to gait generation are presented—an intuitive approach using software for gait animation, and a periodic app...

interpolation based trajectory planning method which is aiming to achieve smooth biped swing leg trajectory by reducing the instant velocity change which occurs at the time of collision of the biped swing leg with the ground. We first characterize the bipedal walking cycle and point out some major issues that need to be addressed to plan a continuous swing leg trajectory by using the concept of...

From 1970’s, legged robots have attracted much attention of many researchers. In spite of this, it has been regarded that dynamically stable walking is very difficult to be tackled for any types of legged robots. For a trot gait for quadruped walking robots, we have proposed “the sway compensation trajectory”. This method utilizes a lateral, longitudinal, and vertical motion of a robot body to ...