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In order to increase the load capacity of aerostatic bearings, a kind of continuous slot-restriction aerostatic thrust bearing was designed and manufactured. The CFD simulation and experiment methods were both used for studying it; the data about the load capacity was derived from the two methods. The calculation results of the CFD simulation method were compared with the experiment ones. The following...
This paper deals with the optimum dynamic positioning control problem for marine ships in the presence of actuator gain uncertainties and unknown environmental disturbances. The proposed approach is formulated as two modules, i.e., the guidance part and the control part. By utilizing the improved extremum seeking algorithm, the optimum-seeking guidance is developed in this note to generate the reasonable...
According to the existing problems that gravity data, digital elevation model are very difficult to obtain in China. The method of refining the geoid with the new "remove-restore" technique based on model geoid height calculated by EGM2008 and model geoid height, model height anomaly calculated by EGM96 are studied respectively. Verify the feasibility by using model geoid height of EGM2008...
Aiming at the features that GPS signal noise has strong randomness and its effect on GPS data processing accuracy is irregular, This paper will be based on applications of the mathematical tools of wavelet analysis in GPS data de-noising processing, meanwhile Kalman filtering method is introduced, and putting forward the adaptive Kalman filtering method that based on the wavelet analysis. The experimental...
A feedback LPV control approach is proposed for a class of nonlinear matrix second order systems. With some assumptions satisfied, the nonlinear system can be converted into a Polytopic LPV system by the application of a nonlinear state feedback. Then the control law can be designed through LPV control techniques. The method is validated on a hub-beam system, which is first converted to the Polytopic...
The mathematical model of electronic capacitive voltage transformers (ECVT) in the power system is built by analyzing the sensing principles and applied environment of the ECVT, and point out that the existence of the distribution stray capacity is the key factor effecting to the transformer accuracy. From the viewpoint of the equivalent circuit, the interaction mechanism of the ECVT measuring error...
This paper considers a single product closed loop supply chain, in which the manufacturer faces an uncertain market demand and price-dependent stochastic returns. There are two options for supplying the products: either producing products by new materials and components, or remanufacturing the recycle products and bringing them back to dasiaas newpsila conditions. The problem is to determine the quantities...
In order to further improve the sensor design of electronic capacitive voltage transformer (ECVT) based on capacitive voltage divider, after establishing the complete mathematical model of ECVT, the article presents the idea of using the complete mathematical model of ECVT capacitive voltage divider to analyze its error characteristics and optimize the design parameters based on the definition of...
In this paper a semi-physical simulation platform has been designed for modeling and control of flexible multibody systems. On the platform experimental modeling with subspace identification method is performed. After a brief introduction to the platform design, the multisine exciting signal filtered by a reshaping filter is presented to improve the SNR of output data. Based on the identified mathematical...
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