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This paper focuses on structure optimization of wedge-ring joint of underwater robot based on response surface method (RSM). Experiments for the combination of the 4 parameters of Unmanned Underwater Vehicle's (UUV) wedgering joint are designed in combination with central composite experimental method (CCD). FEA software ANSYS is used to get the respond data of structure stress and mass of wedge-ring...
Harmonic drive (HD) systems benefit from their high transmission ratio and extremely low transmission error, therefore, they are widely applied to robotic and space sciences. High stable HD gains pupolarity in space drive mechanism. Flexspline plays an important role in HD, however, the high stable HD has a special flexspline different from the conventional one. The requirement of weight and volume...
The extractive technique of allicin was investigated in this paper. The optimum extractive condition of allicin was determined through orthogonal design and response surface analysis as follows: the enzymatic hydrolysis time was 32.4min; temperature was 30; pH was 6.0; ratio of material to ethanol was 1:6.4; extracting time was 60min; extracting temperature 27.4; 95% ethanol. Under such condition,...
One practical method to increase the density of Habrotrocha sp., which is a kind of useful bdelloid rotifer in the wastewater biological treatment system, is to cultivate the metazoa in certain numbers and then put it into the treatment system. Therefore, it is necessary to develop a method which can efficiently cultivate Habrotrocha sp‥ In this paper, the optimization of culture condition for Habrotrocha...
BIW modal optimization with traditional FEM method was inefficiency and usually with much mass increase. FEM analysis combined with Multi-objective Optimization method was used to improve the first order frequency of BIW. Mathematic model was built by response surface method to replace FEM model and NSGA-II was used to get non-dominated solutions. During the optimization plates with high relative...
The main target of this paper is optimizing the slot-opening shift for cogging torque reduction in BLDC motors. In a slot-opening shift method there is no skew, therefore the known drawbacks of the skewing is prevented. In the first part of the paper the slot-opening shift method for a BLDC motor is discussed. In this case, it is desired to find a method for cogging torque reduction without deteriorating...
This paper presents an optimization method of the back EMF for the double layered (double air gap) large-scale BLDC motor by using a Latin-hypercube sampling strategy. In order to drive the large-scale BLDC motors in parallel and multiphases, the back EMF of inner stator is equal to the back EMF of the outer. A new configuration of the double layered BLDC motor is also proposed for the compactness...
Draw bead geometry parameters have a significant effect to the quality of sheet metal forming. The application of response surface method (RSM), orthogonal experiment design method (OEDM) and dynamic explicit finite element method (FEM) in the optimum design (OD) for draw bead geometry parameters used in drawing procedure of cross member panel, a benchmark of Numisheet'2005, was discussed. The comparison...
A multi-axis force/moment sensor, which can measure force and moment, is useful for robotic force control. However, the smallest multi-axis force/moment sensor has excess height, which restricts postures in tasks by a robot hand. In this paper, we aim to develop the thin-type four-axis force/moment sensor that can measure the twisting moment on the finger cushion of a robot hand and improve performance...
Response surface method (RSM) is a set of mathematical and statistical methods for experimental design and evaluating the effects of variables and searching optimum conditions of variables to predict targeted responses. Oestrone (E1) is one of the most important steroid estrogens in sewage and waterbody. An internal standard method of HPLC-MS-MS for E1 is established with its operational parameters...
This paper presents a global optimization algorithm combining an adaptive response surface approximation of the objective function and (1+λ) evolution algorithm. In the adaptive approximation, an optimal Latin hypercube sampling strategy based on multi-objective Pareto optimization is developed to obtain the sampling data in the design variable space, and multiquadric radial basis function is employed...
The performance of mobile phones has seen much improvement in recent years. It has thus become essential to produce higher quality microspeakers, which are a significant component of mobile phones. The major criteria used to evaluate microspeaker performance are the Sound Pressure Level (SPL) and the Total Harmonic Distortion (THD). Accordingly, it is essential to predict SPL and THD to ensure high...
In this paper, the simulation and optimization electric field distribution in 550kV disconnectors of Gas Insulated Switchgear (GIS) are investigated employing the Finite Element Method (FEM) and Response Surface Method (RSM). The simulation results reveal that a uniform electric field distribution is achieved in 550kV disconnectors of GIS. This optimal prototype of disconnectors has been undertaken...
This paper proposes a multi-objective optimal design for an in-wheel permanent magnet synchronous motor (PMSM) at the rated and maximum torque. In order to improve the characteristics of the PMSM such as the average torque, torque ripple and the efficiency, the Taguchi method, the response surface method (RSM) and genetic algorithms (GA) are utilized. In addition, the results of the proposed model...
This article proposes a controller optimization for given external inputs, i.e., fluttering NRRO, RRO, sensor noise, and torque disturbance to be called ??run-outs.?? This run-out oriented controller design is based on a response surface method and provides an optimal controller that minimizes positioning error (PE) due to these run-outs. The proposed method is not only for controller tuning but also...
Beads are a widespread technology for reinforcing sheet metal structures, because they can be applied without any additional manufacturing effort and without significant weight increase. The two main applications of bead technology are to increase the stiffness for static loading conditions and to reduce the noise and vibrations for dynamic loadings. However, it is difficult to design the bead patterns...
This paper deals with the shape optimization of the BLAC motor, in order to reduce its cogging torque. The motor type is an interior permanent magnet motor, and the motor is designed for an electric power steering system application. In this application, a motor cogging torque is one of the most important parameter, and the shape optimization to reduce the cogging torque of the BLAC motor is accomplished...
This paper describes an approach to robust design of electric machine to enhance the robustness. The approach is based on the Response Surface Methodology and the estimated model is used to minimize the total sensitivity of design variables. A validity of this approach is verified through comparing the robust solution with the normal result obtained by a conventional optimization procedure.
In this paper, the design method of minimizing the cogging torque for the Interior Permanent Magnet Motor(IPM) is proposed by using the hybrid algorithm. The suggested optimization algorithm is conducted by combining Response Surface Method(RSM) and Improved Simplex Method. The result shows the improved characteristics compared to conventional methods, such as the shorter calculation time and the...
Ship design is a complex endeavor requiring the successful coordination of many different disciplines. According to various disciplines requirements, how to get a balanced performance is imperative in ship design. Thus, a all-in-one Multidisciplinary Design Optimization (MDO) approach is proposed to get the optimum performance of the ship considering three disciplines, structure; cargo loads and power...
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