Engineering topics

Sastry, S. Shankar

Publications and source records attributed to Sastry, S. Shankar.

2 records

NASA NTRS1989

Adaptive control of linearizable systems

Initial results are reported regarding the adaptive control of minimum-phase nonlinear systems which are exactly input-output linearizable by state feedback. Parameter adaptation is used as a technique to make robust the exact cancellation of nonlinear terms, which is called for in the linearization technique. The application of the adaptive technique to control of robot manipulators is discussed. Only the continuous-time case is considered; extensions to the discrete-time and sampled-data cases are not obvious.

Sastry, S. Shankar↗

NASA NTRS1989

Control experiments in planar manipulation and grasping

Many algorithms have been proposed in the literature for control of multifingered robot hands. Here, the performance of several of these algorithms is compared, along with that of some extensions of more conventional manipulator control laws, in the case of planar grasping. Based on experiments performed on Styx, the most effective control laws are the simple joint control law and the generalized computed torque law. The computed torque control law is shown to be an attractive alternative for position control of multifingered hands.

Murray, Richard M.↗