Open-loop controller

About: Open-loop controller is a research topic. Over the lifetime, 16148 publications have been published within this topic receiving 224014 citations. The topic is also known as: non-feedback controller & open-loop control law.

Evolving controllers for simulated car racing

Abstract: This paper describes the evolution of controllers for racing a simulated radio-controlled car around a track, modelled on a real physical track Five different controller architectures were compared, based on neural networks, force fields and action sequences The controllers use egocentric (first person), Newtonian (third person) or no information about the state of the car (open-loop controller) The only controller that able to evolve good racing behaviour was based on neural network acting on egocentric inputs

An adaptive run-to-run optimizing controller for linear and nonlinear semiconductor processes

Abstract: This paper presents a new run-to-run (R2R) multiple-input-multiple-output controller for semiconductor manufacturing processes. The controller, termed optimizing adaptive quality controller (OAQC), can act both as an optimizer-in case equipment models are not available-or as a controller for given models. The main components of the OAQC are shown and a study of its performance is presented. The controller allows one to specify input and output constraints and weights, and input resolutions. A multivariate control chart can be applied either as a deadband on the controller or simply to provide out of control alarms. Experimental designs can be utilized for on-line (recursive) model identification in the optimization phase. For testing purposes, two chemical mechanical planarization processes were simulated based on real equipment models. It is shown that the OAQC allows one to keep adequate control even if the input-output transfer function is severely nonlinear. Software implementation including the integration of the OAQC with the University of Michigan's Generic Cell Controller (GCC) is briefly discussed.

Complementary PID Controller to Passivity-Based Nonlinear Control of Boost Converters With Inductor Resistance

Abstract: Since the DC-DC boost converter exhibits highly nonlinear and non-minimum phase properties, it is not an easy task to design a controller that is robust against load perturbations. This paper presents a dynamic output feedback controller for a DC-DC boost converter that has a practical inductor and a series resistance. In order to maintain its robust output voltage regulation, the proposed controller adopts a simplified parallel-damped passivity-based controller (PD-PBC). A complementary proportional-integral-differential (PID) controller to the PD-PBC has been designed for removing the steady state error owing to the parasitic resistance. We present sufficient conditions for the asymptotic stability of the augmented system with an additional dynamic system. Computer simulations and experimental tests under reference step changes and load perturbations confirm the improved performance of the proposed approach.

I/O controller for controlling the sequencing of execution of I/O commands and for permitting modification of I/O controller operation by a host processor

Abstract: A data processing system which includes a host processor and an input/output (I/O) controller unit for controlling communication with I/O devices. The controller processor receives I/O commands from the host processor, accesses and stores control block lists of control commands associated with such I/O commands, and executes the control commands from such control block lists. The controller unit stores controller information concerning the operational capability of the controller unit and the host processor is capable of accessing such controller information and in turn can modify such operational capability if desired.