Temat: loop gain - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: One Approach Towards Analytical Determination of the CNC Machine Tool Servo Drives Position Loop Gain
Autorzy:: Pandilov, Z.
Dukovski, V.
Tematy:: analytical determination
CNC machine tool
servo drives
position loop gain; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/971165.pdf Link otwiera się w nowym oknie
Opis:: One of the most important factors which influences the dynamical behaviour of the servo drives for CNC machine tools is position loop gain or Kv-factor. It directly influences the contouring accuracy of the machine tool. Usually position loop gain is experimentally tuned on the already assembled CNC machine tool. This paper gives one approach towards its analytical calculation. The difference between analytical calculated and experimentally obtained Kv-factor is smaller than 5%, which is completely acceptable.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Improving the contouring accuracy of a HSC linear motor milling machine
Autorzy:: Pandilov, Z.
Durakbasa, N.
Dukovski, V.
Tematy:: contouring accuracy
linear motor machine
position loop gain
sampling period; Pokaż więcej
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Powiązania:: https://bibliotekanauki.pl/articles/99668.pdf Link otwiera się w nowym oknie
Opis:: In recent years, instrumentation circular profile tests have been specified to assess the contouring accuracy of CNC machine tools. Such an instrumentation type test is the HEIDENHAIN grid encoder system, which is particularly appropriate for dynamic measurements, especially at high feed rates. In this paper influence of the position loop gain and sampling period on the contouring accuracy are effectively studied.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Novel robust control design for unstable systems with dual pole and dual zero
Autorzy:: Zhang, X.
Zhang, G.
Tematy:: unstable process
robust control
improvement
closed-loop gain shaping
dual pole
dual zero; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Powiązania:: https://bibliotekanauki.pl/articles/205848.pdf Link otwiera się w nowym oknie
Opis:: In this note, a novel robust control design for a class of unstable systems with dual pole and dual zero is addressed. In the algorithm, αfeedback node was moved from the interior of the controlled plant to its right-hand side. Then, the closed-loop gain shaping algorithm was used to design the feedback transfer function. Consequently, controller and the controlled plant have clear physical meaning and are easily tuned. Simulation results show that the control effects are better than for the previous modification, the system can have rapid settling time with no overshoot, zero steadystate error and satisfactory robust stability to model perturbation and disturbance. The method has the advantages of simple and efficient design, and it was also successfully applied to control static unstable missile.
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Loop Gain of the Common-Drain Colpitts Oscillator
Autorzy:: Kazimierczuk, M. K.
Murthy-Bellur, D.
Tematy:: band-pass feedback networks
Colpitts oscillator
common-drain amplifier
location of poles
loop gain
oscillation conditions
positive feedback
resonant oscillators
tuned oscillators
voltage-controlled oscillators (VCO); Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/226711.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the derivations of the voltage transfer functions of the amplifier A, the feedback network β, and the loop gain Τ of the common-drain (CD) Colpitts oscillator, using the small-signal model of the CD Colpitts oscillator. The derivation of the characteristic equation of the CD Colpitts oscillator is presented. Using the characteristic equation, the equation for the oscillation frequency of the sinusoidal output voltage and the condition for steady-state oscillation are derived. The characteristic equation is used to obtain a plot of trajectories of the poles of the CD Colpitts oscillator by varying the MOSFET small-signal transconductance gm. The locations of the complex conjugate poles depicting starting and steady-state conditions for oscillations are also presented.
Dostawca treści:: Biblioteka Nauki

Artykuł

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