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This paper presents a novel two channel control law for high transparency teleoperation under time delay with guaranteed delay independent L2 stability. Four channel controllers have long been known to provide transparent teleoperation when time delay does not exist on the communication channels. However under time delay, a trade-off between delay and transparency must be made to make the system stable...
Dead-times are widely utilized for the inverters to prevent short-circuits. In motor drive applications, 6th-order torque pulsations caused by dead-times depend on rotational speeds of motors. A Disturbance OBserver (DOB) approach is effective for the dead-time compensation in low load operations. The performance of the DOB depends on the observer gains. Hence, if we use the conventional constant...
This paper proposes a controller design method using modeling-error feedback to improve steady-state performance for a system with time delay. The controller is designed based on the mixed H2/H∞ control assuring the stability condition with Lyapunov-Krasovskii functional. The proposed method resolves the problem of steady-state error due to model error which the conventional method using a communication...
In this paper, an exact fuzzy modeling is adapted to design a nonlinear controller/observer for an inverted pendulum on a cart. Based on computed torque method, the nonlinear model is simplified, and two scalar valued auxiliary functions are defined and used to construct a full fuzzy model. Based on the obtained model, efficient and more practical controller and observer are designed with less complexity...
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