The paper describes a very simple class of adaptive PID regulators, where the the method is based on the explicit identification of the process and a design equation is used ensuring 5% overshoot in the step response....
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The paper describes a very simple class of adaptive PID regulators, where the the method is based on the explicit identification of the process and a design equation is used ensuring 5% overshoot in the step response. The algorithm is dedicated for micro-processor based compact controllers (MBCC's).
The strong consistency of ML estimators for Partial Fraction Matrix (PFM) and Elementary SubSystem (ESS) representations of vector ARMA processes will be discussed for the case, when the structure is overestimated. Th...
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The strong consistency of ML estimators for Partial Fraction Matrix (PFM) and Elementary SubSystem (ESS) representations of vector ARMA processes will be discussed for the case, when the structure is overestimated. The main results of the paper are the off-line strong consistency theorems of ML estimators for PFM representation, when the number of poles is overestimated and for the ESS representations when the number of ESS-s associated with the poles is overestimated.
This paper is concerned with the problem of optimal daily scheduling of the electricity production by power system of thermal power plants. The problem and its model is closely related to the so called optimal unit co...
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This paper is concerned with the problem of optimal daily scheduling of the electricity production by power system of thermal power plants. The problem and its model is closely related to the so called optimal unit commitment problems. The main difference is that in our approach the transmission network is also taken into account. Beside the variables and constraints describing the production of the individual power plants there are also variables characterizing the state of the network. The constraints imposed bv the transmission system and the active power losses are also taken into consideration. A further difference is in the way in which we deal with the units of the power stations. Instead of the operation of single units we take always the feasible combined operations of the units of a power station into account. Time-dependent stillstand and restart costs are involved. A special type of constraint appearing in our problem is the so-called fuel constraint. This requires that in some power plants the daily overall production - directly connected with fuel consumption - should differ from a given value only to the extent of a very small percentage.
Based on some relations discovered between the deterministic servo regulator and the PID design a simple design role is presented for stable processes to ensure 5% relative overshoot for the closed loop step response....
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Based on some relations discovered between the deterministic servo regulator and the PID design a simple design role is presented for stable processes to ensure 5% relative overshoot for the closed loop step response. The adaptive solution is based on the explicit identification of a second order process model with time delay. Extending the PID regulator by an appropriate correcting term the poorly damped or inverse unstable process zero is allowed to be a zero of the closed loop system, as well. Additional pole placement is also available.
One of the most serious problems encountered in Naval steam plants following World War II was the unreliable performance of boiler and main feedpump pneumatic control systems. In addition to control component and syst...
One of the most serious problems encountered in Naval steam plants following World War II was the unreliable performance of boiler and main feedpump pneumatic control systems. In addition to control component and system design deficiencies, these control systems suffered from inadequate methods to measure and adjust system alignment. This paper describes the development of a set of procedures for on-line alignment verification (OLV) of pneumatic main boiler and feedpump control systems. The procedures are designed for use by N avy control system technicians and, in addition to on-line alignment verification, provide guidance for troubleshooting and for performing system alignment. Procedure static checks measure steady state steaming performance and OLV procedure dynamic checks measure the ability of the boiler and control systems to respond to load changes. The paper describes typical control system characteristics that influence OLV procedure content and the supporting analysis that was used to establish alignment criteria ranges that satisfy both steady state and transient performance requirements. Also described is the alignment criteria tolerance analysis along with the steps involved in a typical OLV check procedure development. Descriptions of the various OLV checks, troubleshooting procedures and alignment procedures are provided. Typical shipboard implementation requirements are described and experience to date with the procedures is provided along with a status report on OLV procedure implementations.
The paper analyses a pneumatic temperature transmitter the principle scheme is shown. The device is a gas filled thermal system coupled with a force to air converter with a standard output signal. From static point of...
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The paper analyses a pneumatic temperature transmitter the principle scheme is shown. The device is a gas filled thermal system coupled with a force to air converter with a standard output signal. From static point of view the paper points out the necessity of “theoretical” zero and span adjustments which, as in practice, must preceda the static characteristic determination. An iterative method of doing these adjustments with a quick static characteristic determination are given. Supply effect is also evaluated. The paper also presents the dynamic aspects regarding stability and time response problems. Some experimental data are included and the main constructive aspect is stated.
A new method is presented, whose main contribution is a new parametrization especially for structure seeking purposes. The ML method is applied for parameter estimation and special consideration is devoted to the eval...
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A new method is presented, whose main contribution is a new parametrization especially for structure seeking purposes. The ML method is applied for parameter estimation and special consideration is devoted to the evaluation of elementary subsystems constituting the model. Some illustrative examples are also shown.
The storage of manipulator control functions in the CM AC memory is accomplished by an iterative process which, if the control function is sufficiently smooth, will converge. There are several different techniques for...
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