Study of an attitude sensing system for precise pointing hexapod

Experimental Study of Active Vibration Control for Flexible Truss by Using a Stewart Platform Manipulator

“…The SPM is a six dof parallel kinematic and dynamic mechanism with advantages of big stiffness, high stability, strong bearing capacity, small moving inertia and good dynamic performance. Therefore the SPM has wide application prospects in aspects of vibration isolation and target tracking [15]. The BP neural network (BPNN) is a multilayer forward network with good performance, suitable for approximation of multivariable nonlinear function.…”

“…This algorithm does not take account of the accumulated experience, only considering the current gradient information, and the learning process often oscillates. So adding a momentum to weights adjustment process, the weights adjusting law becomes formula (15). Here is a constant.…”

Adaptive fuzzy vibration control of large flexible truss with Hexapod active interface

“…1). As the properties of Hexapod including 6 Degree of Freedom (6-DOF) movement mode, large loading capability, high stiffness, high pose (position and attitude) accuracy, ideal dynamics characteristics and powerful architecture configurable capability, etc [7], it's applicable to be the active interface. In addition, Cullar [8] arranged an active device composed of two piezoelectric actuators based on flextensional motion amplification at the bottom of flexible beam and carried out the vibration control experiments.…”