We give a survey on double-loop networks with emphasis on new development since the surveys in 1986, 1991 and 1995. c © 2001 Elsevier Science B.V. All rights reserved.

joint flexibility is a very important factor to consider in the controller design for robot manipulators if high performance is expected. most of the research works on control of flexible-joint robots in literature have ignored the actuator dynamics to avoid complexity in controller design. the problem of designing nonlinear controller for a class of single-link flexible-joint robot manipulator...

The bionic joints composed of pneumatic muscles (PMs) can simulate the motion biological joints. However, PMs themselves have non-linear characteristics such as hysteresis and creep, which make it difficult to achieve high-precision trajectory tracking control PM-driven robots. In order effectively suppress adverse effects non-linearity on performance improve dynamic legged robot, this study de...

In this paper, we present an online scheduling algorithm for communication in a distributed control system. The packet size of the communication varies for each execution of the loop within certain bounds. We consider systems with closed loops that restart immediately after the completion of an execution. Our algorithm is based on priority of the loop and size of the communication packet. We de...

The phenomenon of unstable time-lag process is usually familiar in the process industry, but it is hard to be controlled by the conventional method. In this paper a control method called double-loop feedback is put forward, first internal feedback stabilization is adopted, then neural network is used to form the internal model control system, finally it solves the problem of bias and instabilit...

As a very serious problem for control systems, actuator saturation often leads to an unstable system. The maneuvering flight of quadrotors may lead saturation, which commonly affects the quality, including trajectory-tracking accuracy. Quadrotors usually adopt double-closed-loop control, outer loop is position used calculate desired attitude angle and inner generate actions vehicle. To address ...

abstract: gridlock is an extreme traffic state where vehicle cannot move at all. this research studies the development of gridlock by theoretical and numerical analysis. it is shown that the development of gridlock can be divided into several stages. the core of the development is the evolution of congestion loop. a congestion loop is comprised of a number of consecutively connected spillover l...

The feasibility of battery energy storage system (BESS) in ameliorating power transient stability has been proved. However, the required BESS capacity is large, which leads to high price. Meanwhile, improving effect significantly affected by fault location and location. To address problem, a distributed configuration BESS, with coordinated control method, proposed this paper. Firstly, an indepe...

The product delivery system is normally powered by a DC motor. Permanent magnet brushless DC motor small sized, high power density, simple structure, is currently being widely used in a variety of transmission systems. In this paper, a permanent magnet motor position sensorless actuator for the production of a delivery system is studied. The actuator position control algorithm of the EGR system...