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This paper investigates the application to the provision of integral discrete sliding mode tracking control with input constraint for engine idling speed control because the control logic are always implemented in discrete-time by microprocessors. The subject of this experiment is to improve the stability of the system against disturbances such as fuel purges and torque loads. A discrete Sliding mode...
This paper presents a nonlinear control design method for interconnected power systems with induction motors as dynamic loads. To design the controller, a feedback linearization technique is used. The control law is applied through the excitation system of the synchronous generator. The designed controller can provide a stable operation of the systems over a wide range of operating region. In this...
According to the actual situation of combine harvester workload, a load feedback controller based on theory of fuzzy control is designed by means of detecting the information such as threshing cylinder speed, crop screw conveyor speed, feed-in quantity, loss rate which can reflect the workload of combine harvester and researching on multi-signal fusion method. It can auto-control the forward speed...
Radar servo system is a complex system with nonlinearity and coupling. In this paper, the nonlinear mathematical model of radar servo system is established according to the model of executive motor and the load characteristics of radar antenna. Based on the model, an optimal controller for radar servo system is designed by the theory of feedback linearization and linear quadratic regulator (LQR)....
Fuzzy Lyapunov synthesis is extended to the design of type-2 fuzzy logic system controllers for the output regulation problem for a servomechanism with nonlinear backlash. The problem in question is to design a feedback controller so as to obtain the closed-loop system in which all trajectories are bounded and the load of the driver is regulated to a desired position while also attenuating the influence...
This paper presents an H2-norm optimal control scheme for the three main axes of an overhead travelling crane, which guarantees both tracking of desired trajectories for the crane load and an active damping of crane load oscillations. For the model-based feedback control design series expansions are utilised to obtain an approximate solution of the corresponding Hamilton-Jacobi-Bellmann-equation....
Due to the inherent hysteresis in a PAM, the accompanying control of such actuator becomes complicated. In this paper, the pressure/length hysteresis is mathematically described by applying a Maxwell-slip model. The model of this hysteresis is then fed forward to compensate for the actuator nonlinearities. The designed controller is therefore just a simple PI-controller. It shows robust performance...
Modeling of power system plays an important part in modeling of helicopter dynamics system. The precision of turbo-shaft engine model affects directly the fidelity of power system model in process of modeling and simulation on helicopter. Modeling techniques of turbo-shaft engine are studied first, secondly, engine control system model based on main rotor load feedback is proposed and an inner-outer...
This paper considers in particular the design of a controller based on model predictive control and feedback linearization methods for gantry systems. In order to meet the operation requirements of fast anti-swaying and precise positioning of gantry crane systems, a practical optimal control scheme is presented. This controller is designed to guarantee the performance in presence of a class of nonlinear...
A benchmark problem for robust feedback control of a flexible manipulator is presented. The system to be controlled is a four-mass system subject to input saturation, nonlinear gear elasticity, model uncertainties, and load disturbances affecting both the motor and the arm. The system should be controlled by a discrete-time controller that optimizes performance for given robustness requirements. Four...
Unit load system of power plant is a double-input and double-output multivariable system with big inertia. The conventional control method cannot get satisfactory result. In this paper, the system is firstly decomposed into two double-input and single-output subsystems and two MAC controllers are designed accordingly. By solving the two controllerspsila equations, predictive control sequence is obtained...
The paper considers the problem of wing load control problems. To stabilize and control the wing load of the aircraft, an active wing load control system is designed. The dynamic model inversion is used as the feedback linearization method of choice. To dispose the model drift and instability of the aerodynamic model, an on line adaptive neural networks is introduced to reconstruct the inversion error...
Time-varying uncertainties and loads variation will influence the stabilization of Active Power Filter(APF) control system. In order to enhance the capability of interference suppression and robustness, based on Hinfin control theory, a state space model including external disturbances is built. In terms of the state space model, Hinfin output-feedback robust controller is designed using linear matrix...
The paper proposes a control design approach based on a multipoint linearization method for linear electro-hydraulic servo systems. The nonlinear model - which includes the nonlinearities of friction forces, valve dynamics, oil compressibility and load influence - is developed by means of the associated differential equations. Based on some mathematical transformations and approximations, the model...
This paper presents a new procedure for the design of controllers to damp electromechanical oscillations in power systems. The new procedure is derived from a previously developed methodology, which can simultaneously satisfy a number of practical requirements for this type of controller, such as robustness, decentralization, zero steady-state gain and output feedback structure. However, the original...
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