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This paper proposes an automatic performance degradation prediction approach for equipment by use of field data with noise. In this method, the auto-regression model is employed for making performance degradation prediction by means of field data in order to fit the change process of equipment. The order determination for auto-regression model is according to the FSIC criteria which not only consider...
In this paper, we investigate a novel adaptive design approach for nonlinear systems as an exploration of the new challenging topic on dealing with both parametric and nonparametric internal uncertainties in adaptive control of discrete-time nonlinear systems. The existence of both two kinds of uncertainties makes it very difficult or even impossible to apply the traditional recursive identification...
Friction and load disturbance are important factors in high resolution control for 3-axis turntable servo system. LuGre dynamic friction model is adopted to describe the mathematic model of the pitch axis servo system with friction. Due to the dynamic LuGre model is built on three unknown parameters. Besides, system torque and inertia are also uncertain due to the motor torque ripple or disturbance...
At present, chaos system is currently a hot subject of research in nonlinear system. The state estimation and system trace of chaos system are important in chaos control, but the existing algorithm can't adapt the characteristic of chaos system, quite sensitivity to initial condition and long-term unpredictability. A filter applying to chaos system is proposed on chaos system state space theory and...
Permanent magnet synchronous motor (PMSM) is a complex plant to control, due to its high nonlinearity and strong coupling. At the same time, the variations of motor parameters make this problem more serious. So, parameter identification of PMSM seems to be important for the double closed-loop vector control system. To solve this problem, a new method combining Elman neural network(Elman NN) and modified...
This paper aims at controlling the nonlinear coupled variables force and velocity precisely in the electro-hydraulic proportional system. An open-loop control method based on a certain nonlinear model of force (F), voltage (U) and velocity (V), which is established from formula derivation and experimental data analysis, is presented. The experimental results and applications show that the proposed...
An industrial robot calibration algorithm is presented, which uses a line-structure-light sensor. In the proposed method, the sensor is attached to the robot's end-effector and the centre of a ball with known radius is regarded as a virtue point and the robot carries the sensor to measure this virtue point. The kinematic parameters of the robot are estimated due to the coordinates of the virtue point...
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