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Research on Application of Interval-Parameter Optimization in Contamination Control for Hydraulic Systems

Author: ShiXueYuan
Tutor: NieSongLin
School: Huazhong University of Science and Technology
Course: Mechanical and Electronic Engineering
Keywords: Hydraulic system Pollution control Uncertainty Optimization Interval Parameters Filter Policy decision
CLC: TH137.9
Type: Master's thesis
Year: 2007
Downloads: 68
Quote: 4
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Abstract


Compared with other transmission, hydraulic transmission has a unique technical advantages, its application areas including almost the industrial sector of the national economy. The hydraulic system will inevitably be contaminated in the long-term process, various pollutants cause unstable systems and components, performance degradation and even catastrophic consequences. Therefore, we should take the initiative to take effective measures to control the hydraulic system contamination, in order to reduce the failure rate and repair time, to meet the urgent requirements of the national economy all walks of life on the safe and reliable operation of the hydraulic system. The most important issue is to control contamination of the hydraulic system design and maintenance of the filtration system and reduce the degree of contamination of the key points to ensure good performance of sensitive components, but at the same time increase the cost and should therefore be to introduce the idea of ??optimization, the performance and between the cost of compromise, to make the best decisions. Since there are many uncertain parameter optimization modeling, it is necessary to adopt advanced uncertainty optimization theory and methods, optimize the allocation of research on the filter. This paper summarizes the latest research results of pollution control and uncertainty optimization of the hydraulic system at home and abroad, and pointed out that the current research issues to be resolved, elaborated by the need to configure the filter to optimize of thinking and uncertainties optimization method. Second, the typical single-loop hydraulic system as the research object, in-depth study on the basis of pollutant migration laws and pollution transfer equation filtration system design and maintenance of operating costs as the objective function, pollution tolerance and filter sensitive components is dirt holding capacity constraints, the establishment of a the filter configuration optimization decision-making model, and through the analysis of hypothetical examples of the specific application of the model. The simulation studies show that the multi-stage mixed-integer nonlinear programming (MMINLP) method to solve the model, you can get the relationship between the degree of contamination of the hydraulic system status information filtering system operating costs, etc., thus Suction line pressure oil and return oil Do you need to install the filter and when to replace the (cleaning) filter to make the best decisions. Finally, taking into account the configuration of pollutants in the form of invasive / generation rate, the degree of contamination pollution tolerance, filter, dirt holding capacity, cost parameters uncertainties expressed as interval number, the establishment of a hydraulic system filter uncertainty to optimize the decision-making model, and propose a new optimization methods - with Interval parameter multi-stage random mixed integer linear programming (IMMILP) method to get the solution filter optimization under uncertainty configuration . Hypothetical examples of the results of analysis show that, to reduce the ingress of contaminants / generation rate is a fundamental measure of the control system maintenance operation cost filter to optimize the configuration control system maintenance operation cost.

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Hydraulic transmission > The application of the hydraulic actuators
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