IEEE Transactions on Control Systems Technology

In the above paper (Rachid, 1997), the author claims that by using the square of the flux magnitude, he is able to develop a nonsingular controller which requires less computation than the standard field-oriented controller. The purpose of this paper is point out that these claims are incorrect. View full abstract»

An approach is presented that develops an accurate model of parametric uncertainty suitable for structural control design and analysis. This approach requires a number of different data sets to capture the dynamics of the system and its variability. Using an identification technique, the modal parameters of the finite element model are estimated. The parameter estimates are combined into a paramet... View full abstract»

This paper presents an H2/H∞ feedback controller design for active sound control in a headrest. The design method which employ an H2 performance criterion, with H2 and H∞ constraints, was formulated as a convex programming problem using FIR Q-parameterization and frequency discretization, and solved using sequential quadratic prog... View full abstract»

This paper presents the dynamic modeling and real-time torque control for a form tool drilling process. The form tool produces a desired shape in a workpiece through a drilling process. In this study, the form tool drilling process resembles the combination of drilling, reaming, counter-boring, and chamfering operations. The machining process is modeled as a linear system with variable gain due to... View full abstract»

The structured singular value framework is applied to a distillation benchmark problem formulated for the 1991 IEEE Conference on decision and control (CDC). A two degree of freedom controller, which satisfies all control objectives of the CDC problem, is designed using μ-synthesis. The design methodology is presented and special attention is paid to the approximation of given control objective... View full abstract»

In this paper, a new method for process frequency response identification is proposed, which can identify multiple points on a process frequency response from a single relay feedback test. The process output and input responses to the test are decomposed into the transient parts and the stationary cycle parts. These parts are then transformed to their frequency responses using the DFT and digital ... View full abstract»

A new air knife system for control of coating thickness was developed for a hot dip galvanizing line. The existing air knife system can manipulate only the mean coating weight. The developed new air knife system has the flexible nozzle structure, by which the transverse coating weight can be controlled. The controller is a multiinput-multioutput (MIMO) system which consists of m control inputs (me... View full abstract»

This paper proposes an adaptive hybrid controller for manipulators constrained on multiple smooth geometric surfaces and reports the experimental results on a six-degree-of-freedom direct-drive manipulator. This controller produces simultaneous position and force tracking of the constrained manipulators even when their physical parameters are unknown since it is incorporated with the model-based a... View full abstract»

This paper describes a robust control design for automatic steering of passenger cars. Previous studies showed that reliable automatic driving at highway speed may not be achieved under practical conditions with look-down reference systems which use only one sensor at the front bumper to measure the lateral displacement of the vehicle from the lane reference. An additional lateral displacement sen... View full abstract»

The active control problem of gaseous processes such as primary air atmospheric-suction and forced-draft supply of air for fuel combustion is addressed in this article. The objective is to regulate gas velocity, at particular locations within the system, so that appropriate volume flow rate is achieved. Using modal expansion and treating the high-order modes as unmodeled dynamics, the governing la... View full abstract»

A nonlinear vehicle model with 22 motion degrees of freedom, used for synthesis of the system autopilot, was described in the paper. It was demonstrated how a controller can be designed on the basis of such relatively complex dynamic model, ensuring simultaneous motion stability of the vehicle in longitudinal, lateral and vertical directions, as well as the stability of roll, pitch, and yaw dynami... View full abstract»

This paper treats modeling and control for the burnthrough point in industrial sintering processes. First, a simple state-space model for event-time dynamics is derived for a complicated system by introducing events into a continuous variable system. For the control of the sintering process, a two-stage control policy is used. First, optimal interevent time is obtained from an output-constrained r... View full abstract»

This paper presents a nonlinear controller for a heating, ventilating, and air conditioning (HVAC) system capable of maintaining comfort conditions under time varying thermal loads. The controller consist of a regulator and a disturbance rejection component designed using Lyapunov stability theory. The mitigation of the effect of thermal loads other than design loads on the system is due to an onl... View full abstract»

A systematic model-free methodology for the identification and compensation of friction is proposed and is shown to be viable for a class of dynamic systems. Design of the proposed identifier for friction uses Gaussian networks and incorporates explicit performance bound information. The identifier is then used in a particular compensation strategy that provides error bound information. The propos... View full abstract»