We have applied the measurement reduction technique for the ghost imaging (GI) in fiber optics systems. Ghost images have been reconstructed by numerical simulation of the complete cycle of GI in the ...basic setup of a multimode fiber endoscope beginning from the propagation of randomly modulated light through a multimode fiber and ending by GI calculation using numerical methods of single-pixel visualization. We have used prior information on the investigated object to obtain high-quality reconstructed ghost images. It is shown that for the number of used patterns of illumination of the object that is much smaller than the number of pixels of the image being reconstructed, the object reconstruction error can be reduced despite the limitation imposed on the number of modes propagating through the optical fiber and forming incoherent radiation. For comparison, we have used several versions of the compressed sensing method and the traditional correlation method. It is demonstrated that the proposed version of the measurement reduction technique applied to multimode fibers shows comparable and often even better results than the traditional correlation method and the compressed sensing method.
The periodic nature of natural and man-made processes, the parametric properties of objects and the physical laws of interaction of material bodies and media affect non-useful vibrations of ...mechanical systems. Vibrations of small amplitude and high frequency are called vibrations, the weakening or elimination of which form a system of vibration protection of machines, part of which is vibration isolation. Decomposition of the General problem of vibration isolation helps to choose technical and engineering solutions of vibration isolation devices for basic, inter-unit connections, and for personnel. The article is intended for developers of vibration isolation tools, students, postgraduates and researchers whose interests include machine dynamics, vibration protection and vibration isolation of machines.
Actual problems are applied issues that are related to vibration isolation of machine assemblies and operator seats in machines. The publication presents some technical solutions of vibration ...isolator systems. These systems are simple in design and include elastic elements with a linear stiffness characteristic, but with a special arrangement to the vibration displacements of the protected object. In systems of vibration isolators "with leap" in a specific range the effect of quasi-zero stiffness of the support is realized with an ideal vibration isolation of the object. Technological and universal technical solution for the vibration-isolating seat of transport machine operator is described in the publication.
Hybrid power plant transport vehicles Balakin, P. D.
Omskij naučnyj vestnik. Seriâ "Aviacionno-raketnoe i ènergetičeskoe mašinostroenie" (Online),
04/2019, Letnik:
3, Številka:
1
Journal Article
Recenzirano
Odprti dostop
The analysis of energy and technical capabilities of the hybrid power plant combinations on the example of a transport vehicle. The perspectivity of a combination of an internal combustion engine and ...an inertial battery, performed by a super-flywheel, is shown. An engineering calculation of the parameters of the super flywheel and the dynamics of the flywheel drive is given
Links of non-free mechanical man-made systems Balakin, P. D.
Omskij naučnyj vestnik. Seriâ "Aviacionno-raketnoe i ènergetičeskoe mašinostroenie" (Online),
10/2018, Letnik:
2, Številka:
3
Journal Article
Recenzirano
Odprti dostop
The paper gives a complete classification of the links of non-free mechanical technogenic systems. It is shown that the joint use of holonomic and non-holonomic constraints in mechanical systems ...allows the creation of systems with adaptive properties. The main method of synthesis of such systems is an additional motion to the main motion of the links, which can be either a small motion of self-adjustment or elastic deformation, or significant coming from the control circuit integrated in the system
The worldwide trend of the modern machine building industry is the produced machines power density increase resulting in increasing the operation velocity while the machines mechanical systems joints ...and rings inertial loading grows and is comparable to the level of the main power flow transformed by the mechanical system. Inertial loading characterizes machines vibration activity. In this regard, machines balancing problem is of particular relevance. The paper provides the mechanical systems balancing technique by installing the counterweight directly in the inertial excitation generation areas.
The design approach is based on to mechanical systems is implemented by adaptive properties to the actual parameters and to the operating conditions in the synthesis of the mechanical drive on design ...stage allows to implement many technical solutions of mechanical transmission with qualitatively new properties. Using for the adaptation additional motion of the links to the main one, it is possible and important to get auto-CVT with the transfer function dependent on the level of the transmitted power flow. The design of the auto-CVT which is potentially capable to provide full use of the available power in the mechanical drive, stationary and energetically perfect mode of operation of the engine at variable type of external loading is considered. Mathematical model of mechanical auto-CVT obtained by using Gibbs function - the acceleration energy. The results of the research are on the basis of which it is possible to perform design calculations of the links and connections of the auto-CVT, including its automatic control chain.
Detailed quantitative analysis of the energy and technical capabilities of various hybrid power-generating system combinations for a transport machine is performed. Prospective combination of ...compression ignition engine and inertial energy-storage device made by the superflywheel is shown. Engineering analysis of superflywheel parameters and features of the dynamics of the flywheel drive is given.
The publication presents some technical solutions of mechanical systems created on the basis of gears, the design of which includes additional elements with nonlinear properties. The characteristics ...of such elements with automatic control stiffness control allow to implement a universal design approach mechanical systems providing the property of adaptation to variable external loading of mechanical systems at the design stage, while improving the dynamic quality of the system.
A universal technique to transform general mechanical systems in rotative ones with a constant equivalent inertial characteristic is proposed. The technique is based on attaching of a kinematic chain ...with a program change of inertial characteristic to a reduction link. The inertial characteristic in addition to the main one forms the reduction link with a constant equivalent moment of inertia. Such modification of a mechanical drive eliminates parametric power drive excitation, reduces the level of dynamic load in links and drive joints, that results in reliability and system resource improvement.
PDF
