Zhang Fuhai

Design, simulation and walking experiments for a humanoid and gorilla robot with multiple locomotion modes

Aim at studying the whole humanoid and gorilla robot, a small integrated combinational gorilla robot with multiple locomotion modes and a humanoid head with facial expressions is presented in the paper. In order to meet the requirement on quadruped walking, a hand with multiple fingers that can also be used as the front foot is designed. A method of generating steady dynamic biped walking patterns based on variable ZMP is proposed. The motion simulation on the biped walking and quadruped walking of the robot by shifting the robot hands as feet is finished by means of a software for dynamics analysis, so that the basic walking ability of the robot can be ensured. On the basis of theoretical research and simulation, the experiments for biped walking and quadruped walking of the gorilla robot are finished successfully.

Omni-directional quadruped walking gaits and simulation for a gorilla robot

Gorilla robot is a new-type robot with multiple locomotion modes including biped walking, quadruped walking and brachiate locomotion. In comparison with conventional four-legged walking machines, the mechanism of the robot has particularity and complexity. In order to realize quadruped walking of the gorilla robot, we propose the gaits of forward walking, sideways walking, translational walking and turning walking, respectively. The results of simulation show that these gaits are feasible and efficient.

Dynamics and smooth trajectory planning of free floating space robot with zero-disturbance spacecraft attitude

The stability of the spacecraft attitude is very important to the normal work of solar cells and the communication between the system and earth. Therefore a work mode of free floating space robot (FFSR) with zero-disturbance spacecraft attitude is presented; the dynamic equation of FFSR with zero-disturbance spacecraft attitude is derived based on Lagrange method; the smooth and consecutive joint trajectories are designed by adopting a planning method of trigonometric function according to the boundary conditions; the time distribution method of smooth segments to aim at the optimization of joint torques is investigated. The simulation results validate the method proposed, and the outcome sets a good foundation for the motion planning and control of FFSR with zero-disturbance spacecraft attitude.