ANALYSIS OF QUALITY INDICATORS OF AUTOMATIC CONTROL SYSTEMS WITH NONLINEAR APPROXIMATION CONTROL LAW
The subject of research of this work was the study of
the quality of control processes in a nonlinear
automatic control system with an approximating the
control law. In the known published works there are
no results of such studies, which makes it difficult to
synthesis a nonlinear control system for multimode
objects in applied biotechnology, including
technological objects of the agro-industrial complex.
A comparative analysis of the quality of regulation in
the transient and steady-state regimes is carried out. It
is shown that the approximation method used for the
synthesis of the nonlinear control law provides a
linear dependencies in steady-state and close to them
modes in combination with relay modes in transient
regimes, which is a positive factor for improving the
quality of regulation in multimode control systems. It
does not necessary to determine the moments of
switching the dependencies in the control law when
changing modes
According to the Federal statistical observation, in the Stavropol region in 2012 there were 463 companies and organizations, which have stationary sources of pollution, the emissions of harmful substances which have a negative impact on the atmosphere.
The largest volume in the environmental pollution of Stavropol making venture for the production and distribution of electricity, gas and water, manufacturing, transport and communications, a considerable share - mining operation
The versatility of exergic method allowing to value stocks and losses of all types of energy including into balance of any energetic-technological system by means of single criteria of efficiency is considered in the article
The authors have developed classification tools for
grinding feeds and the most promising directions in the
development of tools for the grinding of forages in reducing
energy and metal consumption. We have described
chopper stem of feed, which provides high performance
and good quality of product. In the article,
there is an analysis of existing methods of grinding
coarse fodder and their classification. The work presents
examples of application of stationary and mobile
crushers for crushing of grain and roughage, the technical
parameters of the equipment for preparation of
feed for feeding
The article deals with the issues connected with pulpwood barking and chipping in chippers and wood chip screening according to its size. The authors consider structural and technological factors influencing the quality of the product and determine the tasks for future research of chip production operations at pulp and paper mills. The review and the comparative analysis of the most common equipment used for chip production at pulp and paper mills in Russia are submitted
The article presents the analysis of technologies for processing of liquid pig manure and manure runoffs. We have also given an analysis of the technical means of pig waste treatment and shown the direction of its improvement
The influence of auto-displacement in a resonancetunnel
diode (RTD) on the dynamic range of
amplifiers on these diodes is considered in the
article. The amplification at resonance frequency is
considered and the influence of higher harmonics
is not taken into account, since they do not create a
significant voltage drop at the nonlinear resistance
of the diode. It is assumed that the gain will be
sufficiently large, and then the nature of the
dependence of the gain factors on the degree of
regeneration will be the same for amplifiers "per
pass" and "reflection". This allows us to consider
the problem for both types of amplifiers on the
RTD. The types of amplitude characteristics ,
which are possible for the RTD amplifier, are
considered. The dependences of the parameter
determining the dynamic range of the amplifier on
the position of the operating point for several
values of the product of the resistance on the direct
current of the supply circuit are calculated for the
value of the modulus of the maximum negative
conductivity of the tunnel gap RG max. For each
value of RG max for given parameters, you can
determine the position of the operating point,
which provides the specified amplifier mode.
Dependences of the value of the dynamic range are
constructed with allowance for auto-displacement
and in the absence of auto-displacement for two
values of the degree of regeneration. Taking into
account autosplacement, two possible types of
amplitude characteristics and boundaries of their
existence were revealed. For these two types of
amplitude characteristics, expressions were
obtained that determine the dynamic range of the
amplifier
The possibility of reducing dynamic loads on the driving elements of hydraulic manipulator with a combination of motions of the three links is theoretically justified and confirmed by tests
The article is devoted to the analysis of the use of
large data processing technology in information
systems of territorially distributed complexes
In the article we have presented the theoretical foundations of utilization of agricultural machinery. We consider, first of all, the management and the technology of utilization of agricultural machinery