In the context of I-Center (Instantaneous Center) velocity analysis, the terms "space centrode" and "body centrode" are not commonly used or recognized. It's possible that these terms are specific to a particular source or context that is not widely known or used.
However, I can provide an explanation of the more commonly used terms in I-Center velocity analysis, which are "instantaneous center of rotation" and "instantaneous center of velocity." These terms are used to describe the motion of a rigid body or mechanism.
Instantaneous Center of Rotation (ICR): The instantaneous center of rotation is a hypothetical point within or outside a body or mechanism that has zero velocity at a specific instant in time. It represents the center about which a body is rotating at that particular instant. The ICR is useful in analyzing the instantaneous motion of a rigid body or mechanism.
Instantaneous Center of Velocity (ICV): The instantaneous center of velocity is another hypothetical point that represents the instantaneous velocity of a body or mechanism. It is the point where the relative velocities of any two points on the body or mechanism are perpendicular to the line joining those points. The ICV helps determine the direction and magnitude of the velocity of different points within a rigid body.
Both the ICR and ICV are important concepts in I-Center velocity analysis, which is a method used to analyze the motion of mechanisms and determine the velocity relationships between different points on those mechanisms. This analysis can be helpful in understanding the behavior of mechanisms, such as linkages or robotic arms, and in designing and optimizing their motion.