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The front bearing of the high-pressure rotor of a gas turbine is a high-speed bearing, according to the work of the bearing, the bearing structure was designed. On the basis of determining design variables, a multi-objective optimization function was established, constrainted design variables appropriately and obtained the optimal design result by solving the function. Based on the optimization result,...
Designing gas turbines is a very complex task. It is not a linear procedure but an iterative one, composed by several phases. In the initial phase, the general geometric characteristics and estimate efficiency of the turbine are determined. This phase is known as the meanline design, and it is very important because it determines the starting point for more complex analysis. In this work we use a...
The paper proposes an optimization procedure for the design of a three-phase Interior Permanent Magnet synchronous motor. The aim is to investigate the possibilities to maintain constant the power in the field-weakening region minimizing the active volume and maximizing the power output. The design optimization is based on a new algorithm belonging to the class of Controlled Random Search algorithms...
A gerotor pump has various advantages such as compact size lower noise, less emissions and little pressure ripples for circulation of the fluid, but also it has a disadvantage without adjustable parts to compensate wear between the contact patch because of continuous contact during operation. Wear causes a sharp reduction of volumetric efficiency of pump. This paper presents the optimal design approach...
Small size motorized spindle is widely applied in microscale machine tools (mMTs) in precise manufacturing. Spindle characteristics should be analyzed in machine tool design and optimization. Spindle -toolholder system is the weakest part in the whole machine tool. Precise 3D model of spindle is established to calculate deformation at the top of spindle using ANSYS. Natural frequency is also calculated...
Aiming at shortcomings of existed design structure matrix based task programming methods, a new stochastic task programming model is built in which task execution time and cost are described as stochastic variable subjected to some type of probability distribution. In view of built task programming model, a hybrid simulation optimization algorithm is developed which adopts ordinal optimization and...
The interior permanent magnet (IPM) motor is normally designed with two or more flux barriers per pole. The form of such flux barriers has a direct impact on the torque developed by the IPM motor, including both average value and ripple. The Machaon structure is formed by flux barriers of different shape, greatly reducing the torque ripple. Their shape must be optimized based on the number of poles,...
In this paper, a full applicable procedure for design, optimization and manufacturing of an operational unmanned helicopter with deep and detailed research basis is presented. The proposed process deals with challenging aspects of manufacturing of the mentioned type of aircraft such as cost, weight, operation ability, reliability, mission justification, stability, performance, etc. To show the applicability...
A multiobjective optimization procedure for the design of interior PM motors based on differential evolution algorithm is presented. A comparative analysis has been carried out for the optimized 5 kW, 50 kW and 200 kW IPM motors with two and three layers of cavities in the rotor to show design trade-offs between goals to minimize the motor volume while maximizing the power output in the field weakening...
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