Quadruped robots have good mobility and agility in complex environments, but dynamic control of locomotion for quadruped robots has long been a big challenge for researchers. In this paper, we build the center of inertia (COI) dynamic model of a general quadruped robot and give the exponential coordinates of COI on the special Euclidean space . The COI model takes the whole quadruped robot as one body, so that the only concern is the movement of the COI rather than the body or legs when the robot walks. As a result, the COI model has fewer dimensions of state variables than the full dynamic model, which helps to reduce the computational load. A control method for quadruped robots is presented based on the dynamic model which is constituted of force loop and position loop. This method controls the movement of the COI directly, so it facilitates to guarantee the robot's stability. The virtual body of the quadruped robot is defined to describe the configuration of the quadruped robot. The proportional-derivative (PD) control method on is applied to control the movement of the virtual body, which makes the movement more in line with the group theoretic viewpoint. Finally, some simulation experiments have been conducted to verify the validity of our method.
Dynamic Modeling and Locomotion Control for Quadruped Robots Based on Center of Inertia on SE(3)
Contributed by the Dynamic Systems Division of ASME for publication in the JOURNAL OF DYNAMIC SYSTEMS, MEASUREMENT, AND CONTROL. Manuscript received July 2, 2015; final manuscript received September 28, 2015; published online October 23, 2015. Assoc. Editor: Evangelos Papadopoulos.
- Views Icon Views
- Share Icon Share
- Search Site
Ding, X., and Chen, H. (October 23, 2015). "Dynamic Modeling and Locomotion Control for Quadruped Robots Based on Center of Inertia on SE(3)." ASME. J. Dyn. Sys., Meas., Control. January 2016; 138(1): 011004. https://doi.org/10.1115/1.4031728
Download citation file: