...Jiang Kejian; Zhu Changsheng; Tang Ming The undesired synchronous vibration due to rotor mass imbalance is a main disturbance source in all rotating machinery including active magnetic bearing (AMB)-rotor systems. In the AMB-rotor system, imbalance compensation, which causes the AMB actuators...

...Xingjian Wang; Shaoping Wang LuGre dynamic friction model has been widely used in servo system for friction compensation, but it increases the difficulty of controller design because its parameters are difficult to be identified and its internal state is immeasurable. This paper presents...

...Cory Hendrickson; Robert T. M’Closkey Modulated-demodulated control is an effective method for asymptotic disturbance rejection and reference tracking of periodic signals, however, conventional static phase compensation often limits the loop gain in order to avoid sensitivity function peaking...

... asymptotically the spacecraft attitude when the actuators are fault-free. Additive faults and the partial loss of actuator effectiveness are considered simultaneously and an auxiliary controller is designed in addition to the nominal controller to compensate for the system faults. This auxiliary controller does...

...Wei Wu; Suhada Jayasuriya Proposed here is a new approach for synthesizing an internal model control (IMC) anti-windup (AW) compensator for a stable plant subject to input saturation. Built on the conventional IMC AW scheme, which preserves the stability robustness of the unconstrained system...

... with a supplementary electromagnetic actuator located outside the rotor bearing span. Feedback and feedforward control system design are shown, and comparative experiments on two active vibration control methods for mass unbalance compensation are reported. The methods compared are adaptive FIR filter with the least...

... suspension. Then, the fuzzy static output feedback controller is designed for the obtained T–S fuzzy model to optimize the H ∞ performance of ride comfort through the parallel distributed compensation scheme. The sufficient conditions for the existence of such a controller are derived in terms of linear...

...Thomas J. Connolly; Raul G. Longoria Refinement or improvement of a dynamic system to meet a frequency response specification can benefit from the option to use passive or active compensation, or a combination of both. The process becomes more effective when supplemented with methods derived from...

.... These transducers are used by a set of optimal H 2 feedback compensators to minimize the lateral vibration of a beam. Actuator faults are detected and isolated with a Beard–Jones fault detection filter. This filter is a special case of Luenberger observer, which produces a residual output with specific directional...

...Paul A. Kawka; Andrew G. Alleyne This paper presents an approach for analyzing the performance of dropout compensation strategies for linear servo control systems operating over communication channels with losses. A loss of communication causes the normal control action to be replaced...

... are generally not known with sufficient accuracy, the proposed controller is used for the known part of the dynamics and an adaptation algorithm is used to estimate the unknown parameters online and compensate for the rest of the plant dynamics. The proposed controller can thus adaptively handle the complete...

...Xiaofang Yuan; Yaonan Wang Least squares support vector machine (LS-SVM) modeling based inverse controller (IC) is presented for excitation control of synchronous generator. This IC strategy design includes two main parts: inverse control law and uncertainty compensation. The inverse control law...

... in computing the derivative signals (e.g., velocity and acceleration) based on the position snapshots. In this paper frequency-dependent amplitude and phase compensation algorithms are developed for both the forward difference and the central difference methods to retrieve without distortion the friction...

...Evangelos G. Papadopoulos; Georgios C. Chasparis Friction is responsible for several servomechanism limitations, and their elimination is always a challenge for control engineers. In this paper, model-based feedback compensation is studied for servomechanism tracking tasks. Several kinetic friction...

...Simon S. Park; Yusuf Altintas This paper presents a dynamically compensated Spindle Integrated Force Sensor (SIFS) system to measure cutting forces. Piezo-electric force sensors are integrated into the stationary spindle housing. The structural dynamic model between the cutting forces acting...

.... 01 July 2003 24 November 2003 05 08 2004 array signal processing sensor fusion frequency response feedback compensation control system synthesis Precise control of processes has become increasingly important to ensure high performance and reliability. Sensory...

...May-Win L. Thein; Eduardo A. Misawa This paper proposes the parallel observer system (POS), a multirate estimation technique for discrete time systems, to compensate for systems whose output measurements are only periodically available and under the presence of matched and unmatched uncertainties...

...William de Ojeda; Francisco Ruiz, Professor of Mechanical and Aerospace Engineering, A hydraulic circuit design composed of a pressure-regulating device in conjunction with a spring-loaded flow compensator is shown to be an effective mechanism to improve the pressure control functionality...

...A. P. Petridis; A. T. Shenton A technique based on Horowitz’s nonlinear quantitative feedback theory is presented, in which the size of the uncertainty is reduced by cancellation of the plant nonlinearity through nonlinear inverse compensation. Linear identification of the open loop nonlinear...

.... The output of a nominal H ∞ controller is continuously reconfigured to compensate for any loss of actuator effectiveness. Simulation results demonstrate good fault estimation and flying qualities obtained using the proposed scheme under the actuator fault conditions. Contributed by the Dynamic Systems...