A novel manner of one-legged bipedal locomotion (i.e., ballistic flip) is proposed in this paper. A flip is composed of three sequential stages: stance phase, flight phase and touchdown. During the stance phase, the two objectives of control, constant locomotive speed and taking off at the end of stance phase, are achieved via a control algorithm based on nonlinear feedback linearization. The flight phase needs no active control. Combining dynamics of the three stages, we construct the Poincare' map numerically for a complete flip gait, and then use a gain-tuning strategy to stabilise the fixed point of the Poincare' map corresponding to an unstable cyclic flip gait. One simulation result is given to verify the effectiveness of this strategy.
展开▼