CONTROL theory (Engineering)Nonlinear processes are very common in process industries, and designing a stabilizing controller is always preferred to maximize the production rate. In this paper, tuning of PID controller for a class of time delayed stable and unstable process models using Particle Swarm...
Finally, a real-time implementation of the proposed method is carried on a nonlinear spherical tank system. From the simulation and real-time results, it is evident that the PSO algorithm performs well on the stable and unstable process models considered in this work. The PSO tuned controller ...
A SOLUTION TO THE PROBLEM OF DIRECTIONALITY FOR STABLE AND UNSTABLE SYSTEMS Nonlinear systemsWindup preventionMIMO controlDirectionalityInput saturation can cause different windup effects. Besides controller and plant windup, which appear... P Hippe - Ifac Symposium on Nonlinear Control Systems 被引量...
Two numerical examples, that is, a switched system with two unstable modes and a switched system with delayed feedback control, are given to show the effectiveness of the main results.doi:10.1002/mma.5209Yang DanLi XiaodiShen JianhuaZhou Zhaojie...
Eigenvalues with positive real parts (in the red half-plane) correspond to locally unstable directions. b Homeostatic control that prevents noise from accumulating and causing divergence, also affects stored memories represented by the eigenvalues. However, such mechanisms must only control their positive...
A control system with integral action will be unstable when both signs of the process gain and the controller integral gain are different, and its stability region will be limited to the boundary where the process steady state gain is zero. Unlike processes with output multiplicities, feedback ...
We study the stability properties of linear switched systems consisting of both Hurwitz stable and unstable subsystems using an average dwell time approach. We show that if the average dwell time is chosen sufficiently large and the total activation time of unstable subsystems is relatively small c...
A linear control system with slow and fast modes is considered, where the different dynamics is represented by a small parameter in the derivatives of the fast states. The fast subsystem consists of an asymptotically stable and an unstable part, the interaction between which contains a factor prop...
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Also, the conditions that provide robustness to the system are established mathematically. Two examples including an unstable plant are illustrated to give a clear insight to the behavior of the controlled plant in both the control structures and the simulation results support the derived mathematical ...