Vector dark matter from split SU(2) gauge bosons

We propose a vector dark matter model with an exotic dark SU(2) gauge group. Two Higgs triplets are introduced to spontaneously break the symmetry. All of the dark gauge bosons become massive, and the lightest one is a viable vector DM candidate. Its stability is guaranteed by a remaining Z2 symmetry. We study the parameter space constrained by the Higgs measurement data, the dark matter relic density, and direct and indirect detection experiments. We find numerous parameter points satisfying all the constraints, and they could be further tested in future experiments. Similar methodology can be used to construct vector dark matter models from an arbitrary SO(N) gauge group.

MODELING OF CONTROL OF SPEED CONTROL DRIVE AND SLEW MECHANISM DRIVE OF HIGH-SPEED CATERPILLAR VEHICLE WITH BORDER GEARBOX

The relevance of the topic of investigation is connected with the current trends in gearbox automation and request to lighten slew control of caterpillar vehicles. The purpose set can’t be achieved only in a physical modeling of a drive: the problem is too multiversion and a physical modeling does not guarantee an optimum solution. The scientific novelty of the investigation consists in the authors’ creation of simulator of gearbox drive and slew mechanism drive consisting of an electromotor, a planetary reducer, a crank mechanism, a hydraulic distributor and hydro-cylinder. As a consequence, there is realized a parametric investigation possibility of drive numerous parameter impact upon its performance characteristics. By means of the mathematical modeling the drive parameters ensuring the fulfillment of the requirements specification are substantiated. In the second part of the paper there are shown modeling results of caterpillar vehicle acceleration in a low and the fourth gears and a slew at a speed of 5 m/sec. The result comparison of mathematical modeling and experimental investigations is carried out. The data of experiments, in which took part the authors of the paper, confirm completely the adequacy of the simulator developed. In such a way, the simulator of caterpillar vehicle motion is supplemented with the reliable model of a gearbox drive and a slew mechanism drive in machinery with the border gearboxes. The paper material is used in the design of a similar drive of a new machine.

MODELING OF CONTROL OF SPEED CONTROL DRIVE AND SLEW MECHANISM DRIVE OF HIGH-SPEED CATERPILLAR VEHICLE WITH BORDER GEARBOX

The relevance of the topic of investigation is connected with the current trends in gearbox automation and request to lighten slew control of caterpillar vehicles. The purpose set can’t be achieved only in a physical modeling of a drive: the problem is too multiversion and a physical modeling does not guarantee an optimum solution. The scientific novelty of the investigation consists in the authors’ creation of simulator of gearbox drive and slew mechanism drive consisting of an electromotor, a planetary reducer, a crank mechanism, a hydraulic distributor and hydro-cylinder. As a consequence, there is realized a parametric investigation possibility of drive numerous parameter impact upon its performance characteristics. By means of the mathematical modeling the drive parameters ensuring the fulfillment of the requirements specification are substantiated. In the second part of the paper there are shown modeling results of caterpillar vehicle acceleration in a low and the fourth gears and a slew at a speed of 5 m/sec. The result comparison of mathematical modeling and experimental investigations is carried out. The data of experiments, in which took part the authors of the paper, confirm completely the adequacy of the simulator developed. In such a way, the simulator of caterpillar vehicle motion is supplemented with the reliable model of a gearbox drive and a slew mechanism drive in machinery with the border gearboxes. The paper material is used in the design of a similar drive of a new machine.

Study on Method of Key Target Tracking Parameter Matching

This paper addresses the issue of how to get the optimal tracking parameter matching scheme. At first it establishes the comprehensive evaluation system of target tracking parameter matching scheme which includes four indexes such as capturing probability, getting probability and so on. Then based on the AHP it brings forward the evaluation method based on multi-index decision making to realize the optimized scheme evaluation. Because of the number and level of the parameters, there are numerous parameter matching schemes. So it utilized Uniform Design to optimize simulation experiment number and calculated optimized parameters matching scheme by generalized regression equation. At last, the design examples present the validity and practicability of this method on solving the problems of key target tracking parameter matching scheme.