Because of their large output strain, dielectric elastomer actuators (DEAs) have been proposed for tunable optics applications such as tunable gratings. However, the inherent viscoelastic drift of these actuators is an important drawback and closed-loop operation of DEAs is a prerequisite for any accurate real-world application. In this paper, we show how capacitive self-sensing can be used to ...

The joint problem of the recursive estimation of an optimal predictor for the closed-loop system and the unbiased parameter estimation of an ARMAX plant model in closed-loop operation is considered. A special reparameterized optimal predictor for the closed-loop is introduced. This allows a parameter estimation algorithm for the plant model to be derived which is globally asymptotically stable ...

A new algorithm for H ∞ controller order reduction based on virtual closed loop identification is proposed. A high order H ∞ controller is implemented in a closed loop system simulation. Subsequently, two sets of input/output data of high order controller in closed loop operation will be attained. By selecting an appropriate filter, these data will be filtered. Afterwards, a low order controlle...

The main objective of this paper is to replace autotransformers and transformers in industrial applications by switched capacitor three phase AC-AC converters. The control system is not required in case of open loop operation of AC-AC converters. In this paper, by employing closed loop system, the advantages such as accuracy, reduced error, reliability, fast response and less noise can be ensur...

Aiming at the issues of random delay and delay uncertainty in the control information network, a kind of network remote closed-loop control structure based on virtual reality is proposed. In accordance with the idea of open-loop system to achieve closed-loop control, this method focuses on constructing the virtual controlled object model in the client, making the virtual simulation system and t...

In this paper, a systematic overview of PLL-based closed-loop control methods for interleaved DCM/CCM boundary boost PFC converters is presented. It is shown that the PLL-based closed-loop methods always provide stable operation, unlike the open-loop control methods, where the only method which results in stable operation is the slave synchronization to the turn-on instant of the master with cu...

In the design activity, part geometry is assembled together to create an assembly model. The number of parts can range from a few tens to a few millions and typically the relationships among them construct a closed-loop with under-constrained states in a constraint graph. In this paper, we propose an efficient and robust 3D constraint solving method for determining part positions in closed-loop...

In this paper, first a new algorithm for pole assignment of closed-loop multi-variable controllable systems in a prescribed region of the z-plane is presented. Then, robust state feedback controllers are designed by implementing a neural fuzzy system for the placement of closed-loop poles of a controllable system in a prescribed region in the left-hand side of z-plane. A new method based on the...

Abstract: A closed loop control of the fourth order (LCLC configuration) resonant converter has been simulated and presented in this paper. The PI controller has been used for closed loop operation and the performance of proposed converter has been estimated with the closed loop and the open loop condition. The steady state-transient responses of nominal load, sudden line and load disturbances ...