A Cooperative Control Algorithm for Multiple SVRs Using Correlation of Measurement Data of Distribution Line

In this paper, a cooperative control algorithm for multiple step voltage regulator (SVR) using correlation of measurement data of distribution line is proposed. Conventionally, the control time constant of a SVR placed on the feeder end side was set slower than a SVR placed on the substation side. The unnecessary tap movement of SVR was reduced by this setting. In this case, on the condition that “the photovoltaic power generation output of the feeder end fluctuates” and “only SVR of the end side works”, it is a problem that control of SVR becomes slow. By the proposed method, the SVR settled in end side of a feeder can change its tap rapidly only if the SVR settled in sending side of a feeder will not change its tap by using proposed method. The features of the method are followings: (1) to estimate tap change possibility of the sending side SVR using correlation model of both of the SVR, (2) only use local measurement data of the SVRs for tap change control. By the proposed method, unnecessary tap change operation and lag of tap control are reduced without communication networks.     

Development of Control Method for Outer‐Rotor Spherical Actuator

Conventional multi‐degree‐of‐freedom drive systems need many single‐degree‐of‐freedom actuators, but this makes the structure larger and heavier. The development of a spherical actuator should reduce the number of actuators, but the low torque and narrow rotation range are still problems. We developed a 2‐degree‐of‐freedom spherical actuator with an outer rotor that can produce a higher torque and wider rotation angle. In this paper, we propose a control method; we confirmed its usefulness by performing dynamic analysis using the three‐dimensional finite element method and by taking measurements with a prototype.     

Coupled Analysis by Viscoelastic Body with Rigid Body for Design of MRE Soft Actuator

The magneto rheological elastomer (MRE) is composed of silicone elastomers and ferromagnetic powders that are responsible for its ferromagnetic and viscoelastic properties. The shape and the stiffness of the MRE change depending on the magnetic field. Therefore, it is expected to be used for artificial muscle or damping material. We developed a coupled analysis method by combining the moving particle semi‐implicit/simulation (MPS) method with the finite element method (FEM) for the design of the MRE actuator. However, this method does not take into account a rigid body. Therefore, when analyzing the coil embedded in the MRE, it was difficult to calculate parameters such as the coil rotation and position. Therefore, this paper presents a numerical method for MRE actuator analysis by coupling MPS method with FEM to arrive at a calculation method for a rigid body. The numerical algorithm is described and the calculated results are shown.     

高炉内型对炉内状态的影响

调查了高炉内型对操作的影响.采用数学模拟模型进行了研究.该模型能够分析如下操作条件:压差、燃料比和炉况稳定性(防止管道行程).在高炉内容积、有效高度和炉缸直径等数据的基础上,评价了大量的高炉内型数据.在这次调查过程中,弄清了炉型几何参数对高炉状态的影响,并给出了较佳的参数值.     

Current Superimposition Variable Flux Reluctance Motor

This paper proposes a novel variable flux reluctance motor without dc‐field coils. The stator of this motor has only armature coils. The proposed motor can control the torque‐speed characteristics by increasing or decreasing the field voltage that is superimposed on the armature currents. In this paper, the operational principle of the motor is described, and the N–T characteristics are computed by finite element analysis under vector control. In addition, the N–T characteristics are compared with a conventional variable flux reluctance machine with armature and dc‐field coils.     

Heat-induced Gelation of Myosins/Subfragments from Chicken Leg and Breast Muscles at High Ionic Strength and Low pH

Heat-induced gelation was studied to examine the reason for marked differences in gel strength of myosins at 0.6M KCl and pH 5–6. When leg myosin (L-myosin) or L-myosin tail subfragment was mixed with breast myosin (B-myosin) or B-myosin tail subfragment, rigidity of the mixture gel was higher than the sum of rigidities of the component gels. Difference in strength of heat-induced gel between L- and B-myosin seemed to be caused by differences in filament-forming ability and in gel-forming ability of head and tail segments of both kinds of myosins.     

Odor Components of Human Breath After the Ingestion of Grated Raw Garlic

The major odor components of finely grated, raw garlic in the air of the human mouth have been studied. Immediately after garlic ingestion, tests of the mouth air of six subjects revealed two major peaks that were positively identified as being allyl mercaptan and diallyl disulfide; these findings are based on an evaluation of the fragment patterns of a GC-MS analysis and from the actual retention times of these authentic compounds. The allyl mercaptan level was higher than the level of diallyl disulfide, although both compounds smell like garlic. Our results suggest that after garlic ingestion, allyl mercaptan is the major garlic-smelling compound in human mouth air, and diallyl disulfide is secondary.     

COEVOLUTIONARY GENETIC ALGORITHMS FOR NONCONVEX NONLINEAR PROGRAMMING PROBLEMS: REVISED GENOCOP III

In this paper, we focus on general nonconvex nonlinear programming problems and consider an applicability of genetic algorithms. For such problems, Michalewicz et al. 1995 recently proposed the coevolutionary genetic algorithm, called GENOCOP III, by introducing the concepts of search points and reference points which, respectively, satisfy the linear constraints and all of the constraints. Unfortunately, however, in GENOCOP III, since an initial population is randomly generated, it is quite difficult to generate reference points. Furthermore, a new search point is randomly generated on the line segment between a search point and a reference point and effectiveness and speed of search may be quite low. Realizing such difficulties, in this paper we propose the revised GENOCOP III by introducing a method for generating a reference point by minimizing the sum of squares of violated nonlinear constraints and a bisection method for generating a new search point on the line segment between a search point and a reference point. Through a lot of numerical experiments, both feasibility and effectiveness of the proposed method are demonstrated.