CN201768748U - Eccentricity compensation control system of hot rolling roller - Google Patents

Abstract

The utility model relates to an eccentricity compensation control system of a hot rolling roller, comprising a bar actual outlet diameter detector or a load sensor, a roll gap regulator, a servo valve, and a hydraulic cylinder, which are connected sequentially, wherein the bar actual outlet diameter detector or the load sensor measures the actual outlet diameter of a bar or the actual rolling force of a roller, the value is compared with a set target value so as to obtain a deviation value, and the diameter of the bar is led to reach the set target value by the sequential driving and regulation of the roll gap regulator, the servo valve, and the hydraulic cylinder. The eccentricity compensation control system can improve the diameter accuracy of the bar to a great extent and greatly reduces the influence of the eccentricity of the roller.

Description

A kind of hot continuous rolling roll eccentricities compensation control system

Technical field

The utility model relates to the rolling bar field, particularly a kind of hot continuous rolling roll eccentricities compensation control system.

Background technology

The hot continuous rolling bar production is the important step in integrated iron and steel works' production process, is the important content of hot continuous rolling bar production and produce the demand that high-precision product quality satisfies market and user.

The diameter precision is the important indicator of bar product quality.Roll eccentricities not only produces direct influence to diameter of rod, and bar Automatic Diameter Control system quality of regulation is worsened, and the bar outlet diameter is produced remote-effects.Require under certain situation at rolling accuracy, the diameter of rod error that roll eccentricities caused has exceeded the requirement of diameter of rod precision, so the research of breaker roll eccentricity compensation control has been subjected to very big attention.

The research of breaker roll eccentricity compensation control is the heat subject of Rolling Production process automation field Recent study.For the research of roll eccentricities compensation control, abroad be representative with Japan, just done many experimental studies since nineteen seventies, in short ten years, obtain very big achievement.The domestic roll eccentricities compensate control apparatus overwhelming majority is from external introduction, also is being in the starting stage aspect the roll eccentricities compensation control research.For introduce the roll eccentricities compensation control device, also have a lot of problems to need us to go study, research and solve, better be that the automation of hot continuous rolling bar production is served.

The utility model content

Technical problem to be solved in the utility model provides a kind of hot continuous rolling roll eccentricities compensation control device that can effectively improve bar outlet diameter precision.

A kind of hot continuous rolling roll eccentricities compensation control system of the present utility model, comprise the actual outlet diameter checkout gear of bar, the roll gap adjuster, servo valve, hydraulic cylinder, it is characterized in that: described bar outlet diameter actual detected device, roll gap adjuster, servo valve, hydraulic cylinder link to each other successively, and the other end of described bar outlet diameter actual detected device links to each other with examined object, and described hydraulic cylinder is fixed on the upper spider of hot continuous rolling roll place milling train.

The actual outlet diameter checkout gear of described bar comprises load transducer, roll gap sensor, loop, dead band, mill stiffness coefficient device; Described load transducer is installed in the lower surface of upper spider, and is connecting loop, described dead band, mill stiffness coefficient device successively; Described roll gap sensor is installed in the roof that is connected with described hydraulic cylinder; Described mill stiffness coefficient device all links to each other with described roll gap adjuster with the roll gap sensor.

The actual outlet diameter checkout gear of described bar comprises load transducer, roll gap sensor, wave filter, the first coefficient adjustment device, the second coefficient adjustment device, comparator, converter; Described load transducer is installed in the lower surface of upper spider, and an end links to each other with loop A, the B of two parallel connections; Loop A comprises first coefficient adjustment device and the wave filter that links to each other successively, and loop B comprises the second coefficient adjustment device; Described two loop other ends link to each other with converter; Described converter links to each other with the roll gap adjuster; Described roll gap sensor is installed in the roof that is connected with described hydraulic cylinder, and links to each other with the roll gap adjuster.

The actual outlet diameter checkout gear of described bar comprises roll angular position pick up, load transducer, roll gap sensor, demodulator, roll eccentricities Fourier analyzer; Described roll gap sensor is installed in the roof that is connected with described hydraulic cylinder, and the back connects demodulator; Described load transducer is installed in the lower surface of upper spider, an end and mill stiffness coefficient device and roll eccentricities Fourier analyzer in parallel; Described roll angular position pick up is installed in the roll center, and the back connects the roll eccentricities Fourier analyzer; Described demodulator, mill stiffness coefficient device, the eccentric Fourier analyzer of roller all link to each other with the roll gap adjuster.

The actual outlet diameter checkout gear of described bar comprises load transducer, wavelet multiresolution device, roll gap sensor, demodulator; Described roll gap sensor is installed in the roof that is connected with described hydraulic cylinder, and the back connects demodulator; Described load transducer is installed in the lower surface of upper spider, and the back connects the wavelet multiresolution device; Described demodulator all links to each other with the roll gap adjuster with the wavelet multiresolution device.

A kind of hot continuous rolling roll eccentricities compensation control system comprises load transducer, roll gap adjuster, diameter controller, X ray caliper, servo valve; It is characterized in that: described load transducer is installed in the lower surface of upper spider; Described X ray caliper one end links to each other with the bar port of export, and the other end links to each other with the diameter controller; Described load transducer all links to each other with described roll gap adjuster, servo valve successively with the diameter controller.

Beneficial effect

The utility model can improve the problem of diameter of rod precision to a great extent, greatly reduces the influence of roll eccentricities.

Description of drawings

Fig. 1 is automated location control principle figure

Fig. 2 is for using the roll gap control system block diagram of roll eccentricities offset drift dead band method.

Fig. 3 controls the block diagram of the roll gap control system of method for using roll-force.

Fig. 4 is for using the roll gap control system block diagram of roll eccentricities compensation filter method.

Fig. 5 is for using the roll gap control system block diagram of Fast Fourier Transform (FFT) method roll eccentricities penalty method.

Fig. 6 is for using the roll gap control system block diagram of wavelet multiresolution device roll eccentricities penalty method.

Fig. 7 is drift dead band control loop Principles of Operating System.

The specific embodiment

Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Embodiment 1: the dead band method

The dead band method is that passive roll eccentricities compensation control method compares classic methods.The dead band method generally can be eliminated the periodic component in the control signal.The periodic component of roll eccentricities signal generally is present in the signal that sensors such as measured roll-force, roller gap and diameter of rod export.

The basic principle in method control operation loop, dead band is comprising periodic component (shown in figure a in the accompanying drawing 7) as shown in Figure 7 as can be seen from Figure in the input signal in loop, dead band.The setting of general dead band size is bigger slightly than the amplitude between the positive negative peak of periodic component signal.The dead band bound is drift up and down along with the change of input signal, but skip distance remains unchanged famous drift dead band control method that Here it is always.

When input signal moment peak-peak surpasses deadband upper limit, move on the dead band, reach the maximum of input signal until deadband upper limit; Otherwise when input signal moment minimum peak surpassed the deadband lower limit scope, the dead band moved down, and reaches the minimum of a value of input signal until deadband lower limit.The output signal of dead band control loop equals the mean value (as scheming b in the accompanying drawing 7) of dead band bound.The dead band method based on the application in the roll gap control system of caliper principle shown in Fig. 3-8.The signal P+ Δ P of load transducer output _eComprising and the corresponding periodic component Δ of roll gap offset P _e, P is the benchmark roll-force.The signal of load transducer output changes into after by the dead band control loop and does not comprise periodic component Δ P _eSignal P '.Signal P ' that obtains and milling train stiffness coefficient K _sBe divided by, then can obtain mill spring value P '/K _sOutlet diameter h _aCan calculate by formula 1, that is:

$h_a=c_0+\frac{P^{\′}}{K_s}.---\left(1\right)$

Because half the pairing benchmark roll-force P among the width b in P ' and dead band does not wait, so the error of the bar outlet diameter of through type 1 calculating is:

${\mathrm{dh}}_a=\frac{b}{2K_s}---\left(2\right)$

Embodiment 2: rolling force method

Rolling force method is a kind of roll eccentricities compensating control method of active, and promptly rolled piece is from entering roll gap, and roll-force just remains unchanged always, as shown in Figure 3.

The roll gap adjuster is to measure actual roll-force P by load cell _aWith benchmark roll-force P _rPlus-minus is realized mutually.The deviation signal that the roll gap adjuster sends drives the turnover oil mass of servo valve regulator solution cylinder pressure.Under roll-force kept constant situation, roll eccentricities was eliminated the influence of bar outlet diameter.But when other factors of influence of rolled power occurred, when changing such as the diameter of the rolled piece of preparing to enter roll gap and hardness, roll gap just can not be made correct adjustment and eliminate influence to the bar outlet diameter.In order to compensate the influence of this situation, the general use added diameter compensation control.The most frequently used method is bar outlet diameter deviation signal Δ h _aBe transformed into additional benchmark roll-force signal delta P, as shown in Figure 3.

Embodiment 3: filter method

The roll eccentricities signal is a kind of high frequency waves, and enters the diameter of rod of roll gap and the fluctuation of hardness is a kind of low frequency wave with respect to roll eccentricities.Therefore can adopt the method breaker roll eccentric signal of filtering to extract compensation.Filter method is based on the caliper principle, as shown in Figure 4.

Utilize the roll gap c of hydraulic cylinder to the every side of milling train ₀Regulate, measure roll gap c by the roll gap sensor ₀The load transducer measurement acts on the roll-force P of the every side of milling train ₀Utilize spring equation can calculate the outlet diameter h of bar reality _a, promptly represent with formula 3:

h _a＝C ₀+P/K _S (3)

In the formula: C ₀---unloaded roll gap

P---the every side roll-force of milling train

K _S---the rigidity of the every side of milling train

Actual outlet diameter h _aWith datum diameter h _rCompare, deviation signal is delivered to the roll gap adjuster, drive servo valve with this turnover oil mass of hydraulic cylinder is regulated.The output signal P of load transducer sends among loop A and the B simultaneously in the accompanying drawing 4.In the A of loop, signal passes through low pass filter after regulating through coefficient-k1.In the B of loop, signal is regulated through coefficient k 2, but obstructed wave filter.By two paths of signals is compared, so just can obtain the variable signal of the roll-force of the influence of roll eccentricities, the variation of roll-force is converted to the variation of diameter of rod, utilize spring equation can draw actual bar outlet diameter then, come roll gap is regulated so that the error of product is controlled within the range of permission with this with the datum diameter comparison again.

Embodiment 4: the Fast Fourier Transform (FFT) method

Fourier transform method is a roll eccentricities compensating control method initiatively, and this method is that the signal that comprises the roll eccentricities component is carried out Mathematical treatment, to draw the roll eccentricities compensating signal.Subsequently the roll eccentricities compensating signal is delivered to the influence that compensates roll eccentricities in the roll gap controlled adjuster.

Roll eccentricities Fourier analysis method (Fast Fourier Transform (FFT)), this method have been used roll eccentricities amount e and roll-force variation delta P _eBetween relation:

$\mathrm{\Δ}{P}_e=e\frac{K_M{K}_S}{K_M+K_S}---\left(4\right)$

In the formula: Δ P _e---roll eccentricities causes the roll-force undulate quantity

The roll gap amplitude wave momentum that e---roll eccentricities causes

K _M---plasticity coefficient of rolled piece

K _S---mill stiffness

Because the basic frequency of roll undulate quantity Δ e depends on the velocity of rotation of roll, promptly constitute the roll eccentricities signal with first-harmonic and second harmonic:

Δe＝A1sin(2π×f1×t+β1)+B1sin(2π×f2×t+β2) (5)

In the formula: A1, B1---roll undulate quantity amplitude

F1, f2---fundamental frequency and second harmonic frequency

β 1, and β 2---the position, angle of backing roll and the phase angle between roll zero eccentric position

T---the time

The fluctuation of roll-force comprises the component of a lot of different frequencies generally speaking.Supposing that the roll eccentricities signal is approximate is shown by two main harmonic components and psophometer:

e＝Asin(2π×f1×t+θ1)+Bsin(2π×f2×t+θ2)+random (6)

Promptly getting its first-harmonic and second harmonic compensates.

For obtaining the amplitude and the phase place of roll eccentricities signal, intend taking following method:

(1) at first original gap values between rollers e (n) is carried out the FFT conversion, e (n) is carried out spectrum analysis, be:

$e\left(k\right)=\underset{n=0}{\overset{N-1}{\mathrm{\Σ}}}e\left(n\right)W_N^{\mathrm{nk}},$ k＝0，1，2，……，N-1 (7)

W wherein _N ^NkTwiddle factor for fft algorithm.E (k) is a plural number, and its real part, imaginary part are respectively e _R(k), e _I(k), that is:

e(k)＝e _R(k)+e _I(k) (8)

$\left|e\left(k\right)\right|=\sqrt{e_R^2\left(k\right)+e_I^2\left(k\right)}---\left(9\right)$

θ(k)＝arctan(e _I(k)/e _R(k)) (10)

Can obtain the amplitude spectrum of sequence e (k) | e (k) |, phase spectrum θ (k)

(2) utilize the one dimension interpolation value method to obtain the amplitude and the phase place of first-harmonic and second harmonic.

The first-harmonic and the second harmonic of the roll eccentricities signal that is adopted are respectively:

e1＝A1sin(2π×f1×t+β1) (11)

e2＝B1sin(2π×f2×t+β2) (12)

Can obtain parameter A 1 by interpolation value method, B1, β 1, and β 2.

(3) the breaker roll eccentric signal is reconstructed, and Δ e=e1+e2 is arranged, and is:

e2＝B1sin(2π×f2×t+β2) (13)

Δe＝A1sin(2π×f1×t+β1)+B1sin(2π×f2×t+β2) (14)

Formula 14 is the expression formula of the roll eccentricities signal delta e of FFT method reconstruct.

The roll eccentricities compensation control system basic principle of application FFT method as shown in Figure 5.Load transducer and impulse generator record the roll eccentricities signal, then the signal that measures are delivered to the FFT controller, and the roll eccentricities signal that the FFT controller sends is regulated roll gap by pressure control loop, reach the purpose of roll eccentricities compensation control with this.

Embodiment 5: Wavelet Transform

Fast Fourier Transform (FFT) can not reflect the information of time domain and frequency domain simultaneously, can only be used for the spectrum analysis of stationary signal, can not be used for the processing of non-stationary signal.And the roll eccentricities signal contains the unstable state composition, and the frequency characteristic of signal changes along with the variation of time.Therefore the way for this class signal is, generally be to extract the frequency domain information or the pairing temporal information of a certain frequency band of section sometime, but Fourier transformation can not satisfy such requirement.The wavelet transformation of coming from Fourier transformation development has time domain and frequency domain information simultaneously, can compensate the roll eccentricities signal extraction breaker roll off-centre of coming out.

1. wavelet transformation basic principle

With any L ²(R) function f in the space (t) is launched under wavelet basis, claims that then this expanded function is a wavelet transformation ^[45-47](Continue Wavelet Transform, note by abridging be CWT), its expression formula can represent with formula 3-25, that is:

$\mathrm{Wf}(a,\mathrm{\τ})={\∫}_{-\∞}^{+\∞}f\left(t\right){\mathrm{\ψ}}_{a,\mathrm{\τ}}^{*}\left(t\right)\mathrm{dt}=\frac{1}{\sqrt{\left|a\right|}}{\∫}_{-\∞}^{+\∞}f\left(t\right){\mathrm{\ψ}}^{*}\left(\frac{t-\mathrm{\τ}}{a}\right)\mathrm{dt}$ a，τ∈R；a≠0 (15)

It is inversely transformed into:

$f\left(t\right)=\frac{1}{C_{\mathrm{\ψ}}}{\∫}_0^{+\∞}\frac{\mathrm{da}}{a^2}{\∫}_{-\∞}^{+\∞}\mathrm{Wf}(a,\mathrm{\τ})\frac{1}{\sqrt{\left|a\right|}}\mathrm{\ψ}\left(\frac{t-\mathrm{\τ}}{a}\right)\mathrm{dt}---\left(16\right)$

$C_{\mathrm{\&psi;}}={\&Integral;}_{-\&infin;}^{+\&infin;}\frac{{\left|{\mathrm{\&psi;}}^{^}\left(\mathrm{\&omega;}\right)\right|}^2}{\left|\mathrm{\&omega;}\right|}\mathrm{d\&omega;}<\&infin;---\left(17\right)$

In the above-mentioned formula, subscript * represents conjugation;

It is Fourier transformation; A is scale parameter (contraction-expansion factor), the frequency of decision decomposed signal; τ is positional parameter (shift factor), the time location of decision approximation signal; Function ψ is called basic small echo,

Be called small echo, small echo is the family of functions that is made of by flexible peaceful in-migration basic small echo.

By the definition of wavelet transformation as can be seen, wavelet transformation is the same with Fourier transformation, all is integral transformation.But wavelet basis is different from Fourier's base, so wavelet transformation has a lot of different places with Fourier transformation.

In actual applications, it is discrete to need that the yardstick a in 13 formulas and positional parameter τ are carried out binary system, gets a=2 ^m, τ=n2 ^m(

N ∈ Z, Z represents integer), then binary wavelet transformation is:

$\mathrm{Wf}(m,n)={\&Integral;}_{-\&infin;}^{+\&infin;}f\left(t\right)2^{-\frac{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="HDA0000024770030000031.png,HDA0000024770030000051.png"\; state="\{\{state\}\}">m</figure-callout>}}{2}}{\mathrm{\&psi;}}_{2^m}^{*}(2^{-m}-t-n)\mathrm{dt}=\underset{k}{\mathrm{\&Sigma;}}f\left(k\right)2^{-\frac{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="HDA0000024770030000031.png,HDA0000024770030000051.png"\; state="\{\{state\}\}">m</figure-callout>}}{2}}{\mathrm{\&psi;}}_{2^m}^{*}(2^{-m}k-n)$ k∈Z (18)

Corresponding discrete binary wavelet function ψ _{M, n}(t) be:

${\mathrm{\&psi;}}_{m,n}\left(t\right)=2^{-\frac{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="HDA0000024770030000031.png,HDA0000024770030000051.png"\; state="\{\{state\}\}">m</figure-callout>}}{2}}{\mathrm{\&psi;}}_{2^m}^{*}(2^{-m}t-n)---\left(19\right)$

Corresponding binary system wavelet inverse transformation is:

$f\left(t\right)=\underset{m\&Element;Z}{\mathrm{\&Sigma;}}{W}_{2^m}f\left(k\right)*{\mathrm{\&psi;}}_{2^m}\left(t\right)=\underset{m\&Element;Z}{\mathrm{\&Sigma;}}{\&Integral;}_{-\&infin;}^{+\&infin;}{W}_{2^m}f\left(x\right){\mathrm{\&psi;}}_{2^m}(2^{-m}t-n)\mathrm{dn}---\left(20\right)$

By formula 16 as can be seen, wavelet transformation is f (t) with simultaneously at time domain and frequency-domain small wave function ψ _{M, n}(t) carry out convolution, it is decomposed into f (t) at different frequency bands and the component in the period, the basic principle of multi-scale wavelet decomposition that Here it is.

2. many resolution decomposition of wavelet transformation

Many resolution decomposition are to represent the method for signal, many resolution decomposition on different scale step by step ^[45-47]Be with any L ²(R) the square-integrable signal f (t) in space regards it as a certain limiting case of approaching step by step, as shown in Equation 21:

$f^m\left(t\right)=\underset{m\&Element;Z}{\mathrm{\&Sigma;}}{f}_{m,n}{\mathrm{\&psi;}}_{2^m}(2^{-m}t-n)---\left(21\right)$

Wherein, m=0,1,2 ... be the progression that approaches,

Be scaling function, the approximating function of f (t) is represented by the linear combination of different displacement functions.If the m+1 level of f (t) is approaching of m level, then function

Be a linear combination in the space that basic function constituted approached of m+1 level, that is:

${\mathrm{\&psi;}}_{2^m}\left(2^{-m}t\right)=\underset{k}{\mathrm{\&Sigma;}}h\left(k\right){\mathrm{\&psi;}}_{2^m}(2^{-(m+1)}t-k)---\left(22\right)$

The quadrature set

Constitute SPACE V ₁, the quadrature set

Constitute SPACE V ₀, V wherein ₀∈ V ₁, V ₁=V ₀∪ W ₀, W then ₀The m level that is f (t) is approached f ^m(t) and the m+1 level approach f ^M+1(t) difference between.W ₀It is function

The space that generates of orthogonal transformation function, promptly by shown in the formula 23:

$f^{m+1}\left(t\right)=f^m\left(t\right)+\underset{n=-\&infin;}{\overset{\&infin;}{\mathrm{\&Sigma;}}}{f}_{m,n}{\mathrm{\&psi;}}_{2^m}(2^{-m}t-n)---\left(23\right)$

ψ _{M, n}(t) be wavelet function, scaling function

Relation can be expressed as:

${\mathrm{\&psi;}}_{m,n}\left(t\right)=\underset{k}{\mathrm{\&Sigma;}}g\left(k\right){\mathrm{\&psi;}}_{2^m}(2^{-(m+1)}t-k)---\left(24\right)$

H (k) wherein, g (k) form conjugate lens as bank of filters.

Above analysis as can be known, a little wave train can be represented signal f (t) with formula 25, signal f (t) can be decomposed into approximate part c _kWith detail section d _{J, k}:

$f\left(t\right)=\underset{k=-\&infin;}{\overset{\&infin;}{\mathrm{\&Sigma;}}}{c}_k{\mathrm{\&psi;}}_{2^m}(t-k)+\underset{j=0}{\overset{m-1}{\mathrm{\&Sigma;}}}\underset{k=-\&infin;}{\overset{\&infin;}{\mathrm{\&Sigma;}}}{d}_{j,k}{\mathrm{\&psi;}}_{j,k}\left(t\right)---\left(25\right)$

$c_k=\&Integral;f\left(t\right){\mathrm{\&psi;}}_{2^m}^{*}(t-k)\mathrm{dt}$ $d_{j,k}=\&Integral;f\left(t\right){\mathrm{\&psi;}}_{j,k}^{*}\left(t\right)\mathrm{dt}---\left(26\right)$

Wherein

Be respectively

ψ _{J, k}(t) conjugate function.

Therefore available formula 27 expressions of the result of wavelet multiresolution decomposition:

f(t)＝f _H(t)+f _Mi(t)+…+f _M(N-1)(t)+f _L(t) (27)

Wherein, f _H(t) high-frequency signal, f _L(t) be low frequency signal,

I=1,2 ... N-1 is an intermediate-freuqncy signal, and N is the number of plies of decomposing.The frequency of decomposed signal is close, because the signal that wavelet transformation is different from the Fourier transformation has a frequency accurately.In the result who decomposes, each little wave train has comprised the information of primary signal all frequency bands from high to low.

Utilize wavelet transformation to the roll-force signal that records carry out many resolution decomposition be the roll-force signal decomposition for the signal in several different frequency bands, so just can from the roll-force signal, separate roll eccentricities signal, HF noise signal.HF noise signal is suppressed, and the breaker roll eccentric signal compensates, and the roll-force signal that has filtered roll eccentricities and high-frequency noise is carried out FEEDBACK CONTROL, and Wavelet Transform roll eccentricities compensation control system as shown in Figure 6.

Wavelet Transform not only can be eliminated the influence of roll eccentricities to the bar outlet diameter, has also avoided the deterioration by the adjusting of the caused system of roll eccentricities, thereby has significantly improved the diameter precision of bar.

Claims (5)

1. hot continuous rolling roll eccentricities compensation control system, comprise the actual outlet diameter checkout gear of bar, the roll gap adjuster, servo valve, hydraulic cylinder, it is characterized in that: described bar outlet diameter actual detected device, roll gap adjuster, servo valve, hydraulic cylinder link to each other successively, and the other end of described bar outlet diameter actual detected device links to each other with examined object, and described hydraulic cylinder is fixed on the upper spider of hot continuous rolling roll place milling train.

2. a kind of hot continuous rolling roll eccentricities compensation control system according to claim 1 is characterized in that: the actual outlet diameter checkout gear of described bar comprises load transducer (1), roll gap sensor (2), loop, dead band (3), mill stiffness coefficient device (4); Described load transducer (1) is installed in the lower surface of upper spider, and is connecting loop, described dead band (3), mill stiffness coefficient device (4) successively; Described roll gap sensor (2) is installed in the roof that is connected with described hydraulic cylinder; Described mill stiffness coefficient device (4) all links to each other with described roll gap adjuster (5) with roll gap sensor (2).

3. a kind of hot continuous rolling roll eccentricities compensation control system according to claim 1 is characterized in that: the actual outlet diameter checkout gear of described bar comprises load transducer (1), roll gap sensor (2), wave filter (3), the first coefficient adjustment device, the second coefficient adjustment device, comparator, converter; Described load transducer (1) is installed in the lower surface of upper spider, and an end links to each other with loop A, the B of two parallel connections; Loop A comprises the first coefficient adjustment device and the wave filter (3) that links to each other successively, and loop B comprises the second coefficient adjustment device; Described two loop other ends link to each other with converter; Described converter links to each other with roll gap adjuster (5); Described roll gap sensor (2) is installed in the roof that is connected with described hydraulic cylinder, and links to each other with roll gap adjuster (5).

4. a kind of hot continuous rolling roll eccentricities compensation control system according to claim 1 is characterized in that: the actual outlet diameter checkout gear of described bar comprises roll angular position pick up (1), load transducer (2), roll gap sensor (3), demodulator (4), roll eccentricities Fourier analyzer (6); Described roll gap sensor (3) is installed in the roof that is connected with described hydraulic cylinder, and the back connects demodulator (4); Described load transducer (1) is installed in the lower surface of upper spider, an end and mill stiffness coefficient device and roll eccentricities Fourier analyzer (6) in parallel; Described roll angular position pick up (1) is installed in the roll center, and the back connects roll eccentricities Fourier analyzer (6); Described demodulator (4), mill stiffness coefficient device, the eccentric Fourier analyzer of roller (6) all link to each other with roll gap adjuster (5).

5. a kind of hot continuous rolling roll eccentricities compensation control system according to claim 1 is characterized in that: the actual outlet diameter checkout gear of described bar comprises load transducer (1), wavelet multiresolution device (2), roll gap sensor (3), demodulator (4); Described roll gap sensor (3) is installed in the roof that is connected with described hydraulic cylinder, and the back connects demodulator (4); Described load transducer (1) is installed in the lower surface of upper spider, and the back connects wavelet multiresolution device (2); Described demodulator (4) all links to each other with roll gap adjuster (5) with wavelet multiresolution device (2).

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