DE2047681A1 - Speed curve generator for an elevator control system - Google Patents

Description

Patent attorney ΟίρΙ.-lng. F \ Γ ':. T ~ Λ saa

ώτ'.λ. '''^ Jr. 81-16.145P 9/28/1970

Coin; .. vi. - ~, «--LeineJorfstr. 10

HITACHI, LTD., Tokyo (Japan)

Speed curve generator for an elevator control system

The invention relates to improvements in a speed waveform generator for an elevator control system.

With a passenger elevator one demands a comfortable ride. In order to meet this requirement, it is desirable that the speed profile given to the speed control system for an elevator increases monotonically during acceleration as a function of time until the elevator speed reaches the nominal speed, and that the nominal speed Λ is then maintained for a certain period of time (or that the speed can also be reduced immediately), whereas during the deceleration the speed curve is a function of the distances *; or deceleration distance between the elevator and the desired floor level and monotonically decreasing as the deceleration distance decreases.

A currently common rate history generator for a On-target control system comprises means for generating an acceleration rate curve, which is a function of time

'■ .Lf.-or. 'Jt) H) -TpOt (Y)

209823/0 I del

BATH

and increases monotonically, means for generating a deceleration rate profile, which is a puncture of the distance between the elevator and the desired floor level and which drops monotonically, and a circuit having a time delay of the first order to ensure a smooth transition from the acceleration rate curve to the deceleration rate curve. However, the well-known speed curve generator was thereby it is flawed that the accuracy of the speed profile actually generated is due to the time delay circuit provided therein is pretty low.

The invention is therefore based on the object of an improved To create a speed profile generator that can keep the amount of change in acceleration as small as possible, without using a circuit with a first order time delay and yet high level accuracy having.

The subject of the invention, with which this object is achieved, is a speed profile generator for an elevator control system, characterized by means for generating a monotonically increasing Acceleration speed profile, means for generating a deceleration speed profile, the one Function of the gap between the elevator and the desired one Floor level is and monotonically falling, and means of generating of a compensation speed run that includes a puncture the difference between the acceleration rate curve and the deceleration rate curve is monotonic drops, with the acceleration rate curve or the deceleration speed curve as the actual speed tsver Laut 'is selected in the range in which the difference between the acceleration speed curve and the deceleration rate curve greater than one is a certain setting value, while subtracting the

ilttiVtit'laiifü v \> n the Bench L eun Igung:.; -

2 0 U Ü 2 J / (JII ti BAD ORIGINAL

speed curve or the deceleration speed curve obtained value as actual speed curve is selected in the range in which the difference between the acceleration speed profile and the deceleration speed profile is smaller than the specified setting value.

The invention is explained in more detail with reference to the exemplary embodiments illustrated in the drawing; show in it:

La is a diagram for explaining an ideal speed curve of an elevator; G

Pig. Ib is a diagram for explaining an ideal acceleration curve for the elevator driven according to the ideal speed profile shown in FIG.

Fig. 2 is a block diagram to explain the basic structure of the means for generating a Acceleration speed profile;

Fig. 3a and j5t> Diagrams to explain a speed or an acceleration curve at an elevator equipped with a known speed profile generator;

4a and 4b are diagrams to explain a speed

or an acceleration curve to Λ

Representation of a first speed profile generated with a speed profile generator is obtained according to the invention;

Fig. 5a and 5b are diagrams to explain a speed or an acceleration curve to represent a second, with the speed course generator speed control obtained according to the invention;

FIG. 6 is a block diagram of an embodiment of FIG Invention;

2 0 9 8 2 3 / Ü 1 1 (J.

FIG. 7 is a diagram of the one shown in FIG. 6 Embodiment relay circuit used; and

8 shows a graphic representation of the first and the second speed profile.

j 2

The acceleration ck m / sec and the amount of change in the acceleration ßm / sec ^ in an elevator have their specific limits so that a person traveling with the elevator has a pleasant driving experience. These limits are referred to here as <A m / sec and ρ m / sec · ^.

Fig. La and Ib show an ideal speed curve and a ideal acceleration curve as a function of time in the case of the

maximum acceleration o (m / sec or the maximum dimension of the

"5

Change in acceleration ρ m / sec. In Fig. La mean the

'ε

horizontal and vertical axis the time and the speed speed, while in Fig. Ib the horizontal and vertical axes mean the time and the acceleration.

The ideal speed curve and the ideal acceleration curve according to FIGS. La and Ib will now be explained in detail. In the region from time 0 to time t ^ (hereinafter referred to as mode 1), the acceleration increases linearly, and the amount of change in acceleration is kept at the constant value β . In the area from time t. up to time point t _g (hereinafter referred to as mode 2), the acceleration is kept at the constant value of <X and the amount of change in acceleration is O. In the area from time tp to time t, (hereinafter referred to as mode 3) the acceleration drops linearly, and the rate of change in acceleration is kept at the constant value - β _. In

to

the elevator is accelerated in these areas.

209823/0116

-5- 20A7681

In the range from time X, - to time tu (hereinafter referred to as mode 4), the elevator is driven at the nominal speed V _g . In the region from time tn to time t ₅ (hereinafter referred to as mode 5), the acceleration is increased in the negative direction, and the amount of change in acceleration is kept at _{−β s} . In the range from time t 1 to time t g (hereinafter referred to as mode 6), the acceleration is kept at -fli _s . In the range from time tg to time t “(hereinafter referred to as mode 7), the amount of change in the acceleration is kept at β. The elevator is decelerated in these areas.

The speed profile described above can be converted into a first speed profile that does not include mode 4, and modify a second speed history including the mode. The first speed curve is generated if the distance between the floor level on which the elevator is currently at rest and the desired floor level, that is to be reached with the elevator is smaller than the distance required for acceleration and deceleration of the elevator corresponding to that in the Pig. la and Ib is required, i.e. less than the from the elevator during the period from time 0 to Point in time t, and from point in time t ^ to point of time t "through f running distance is. The second speed curve is generated if the distance between the floor level where the elevator is located and the desired floor level, that is to be reached by the elevator is greater than that for the acceleration and deceleration of the elevator according to that in the Pig. la and Ib shown speed curve is the necessary distance. Theoretically, there can be a third speed curve which does not include modes 2, 4 and 6. If, however, according to normal practice, the maximum permissible acceleration Ot _

209823/0116

1 ra / sec and the maximum amount of change in acceleration β are set at 1 m / sec, the travel path of the elevator must be less than 2.3 m according to the third speed profile, while the minimum distance between adjacent floor levels is usually in the order of magnitude of 2.6 m. The third speed profile is therefore not considered here because it is never generated during normal operation.

An acceleration speed curve V_ for modes 1 and 2 is generated by a puncture generator in such a way that it is a function of the time t in seconds that have elapsed after the elevator started at time t = 0. The acceleration speed curve V for mode 1 can be more precisely in the range t <t (t corresponding to t ^ in FIGS. 1 a and 1 b)

by creating a function

V _a - 1/2 / 3 _S t ² (m / sec) (1)

obtained by integrating the measure of the change in the acceleration ß _s with respect to time.

In the range t ^ t, the acceleration speed profile can be found V for mode 2 by creating a function

egg

ν »c * t - V (m / sec) '(2)

as e

obtain.

Further, t and V are given by the following equations: e e

t » & £ - (see) (3)

^e / 3s

V _e - 1/2 - ^ fI (m / sec) (4)

209823/0118

The equation (4) can be obtained by adding t in the equation (1) is substituted by t in the equation (j5).

With reference to Fig. 2, the output from a function generator FG, which generates a saturated ramp function, an integrator IG and integrate by this according to the time to the above-described acceleration speed curve to obtain.

A deceleration rate curve VV for modes 6 and 7 can be obtained by generating a function that includes a parameter L representing the delay distance in meters f is. A function

^V b - ^1/2 P

in the area from time tg to time t “ , where L- ^ L, while one is a function

2OC _s (L - TfS-) (m / sec) (6)

in the range from time t to time tg, in which LSL. is. The point L in the distance in the above equations (5) and (6) is determined by the maximum acceleration oC and the maximum amount of change in acceleration and deceleration R and represented by

The equations giving the deceleration rate curve V, (5) and (6) are determined in a manner described below. Assuming that the elevator at time t = is brought to a halt, then the delay speed curve V. can be replaced by the time t in the equations

209823/0116

(1) and (2) obtained by -t. Thus, the delay rate sequence V _{fe can be} expressed as

if ItI! == t, and as

(-t) - v _e (9)

if It-I ^> t. t corresponds to t ™ - tg. By integrating equation (8) with time, the delay distance W L is given by

L = 1/6 / S ₀ It ⁵ I (10)

if ItI ^ t is ₀ . From equations (8) and (10), the actual speed curve V can be expressed as a function of the deceleration distance L as follows:

V. 1/2 ß _s (-g.) * '? (11)

On the other hand, when ItI "is 7t, the delay distance becomes L through

(-CX t - V) dt + L (12)

se e

where L _{1 represents} the delay distance when t «-t, and even by the formula

τ l OIL *?

is reproduced.

From the above equations, one can see the actual velocity curve V as a function of the deceleration distance L, express as follows:

209823/0116

V. V 20C ₀ (L - -, A-).

More specifically, the delay distance L is expressed as
/ It

t ^{+ L} e

By replacing t, t, and V ₀ in the above equations with t = j obtained by equation (9), and t and V in equations (5) and (4), the deceleration distance L can now be expressed as "

ots ²

2 2 -V

I ^L e ^{+ L} e s

The deceleration speed curve V i becomes the above Equation as

taken. The above puncture can be carried out continuously Lich detection of the delay distance L and operation of the Receive puncture generator. It is evident that the speed control system for the elevator supplied speed profile can ensure a comfortable ride, if the acceleration velocity curve given by the equations (1) and (2) is represented, provides a smooth transition to the deceleration rate curve, which by the Equations (5) and (6) is shown.

209823/011 β

- ίο -

3a shows the speed curve obtained as a result of the above calculation, in which the acceleration speed profile ν, the deceleration _{speed profile V b} and the nominal speed V ₃ are shown in broken lines, while the actual speed profile V is shown by solid lines. Fig. 3b shows the corresponding acceleration curve. It can be seen from Fig. 3a that the speed curve, in contrast to the curve shown in Fig. La, does not include modes 3 and 5. Due to the absence of modes 3 and 5, the amount of change in acceleration and deceleration is quite large at a point t1 where the speed reaches the rated speed V ₈ and at a point th where the speed starts from the rated speed V ₀ to fall off, as shown in Fig. 3b. An attempt has been made to reduce the amount of change in acceleration and deceleration by supplying the speed history to the elevator speed control system through a circle with a first order time lag. However, this method has been flawed in that the presence of the time delay circuit leads to a high degree of external disturbance. In a further attempt, which was undertaken for this purpose, a time function according to FIG. 1b is fed to an integrator in order to derive an ideal velocity curve according to FIG. 1a from the output of the integrator. However, in this case the 1st Gesohwindigkeitsverlauf a function of time both in ^one Besehleunigungsals in the delay range. This method was therefore flawed insofar as the deceleration rate profile is not dependent on the position of the elevator and the elevator therefore does not stop exactly at the desired floor level.

4a and 4b as well as 5a and 5b show two types of the speed curve generator according to the invention

209823/0116

testified speed curve. Pig. 4a and 4b show a first speed profile that does not include mode 4, while FIGS. 5a and 5b show a second speed profile which includes this mode 4.

In FIGS. 4a and 4b, the reference symbols V _& and V ^ denote the acceleration speed s curve given by the equations (1) and (2) and the decelerating speed curve given by the equations (5) and (6). According to the invention, the actual speed profile V coincides with the acceleration speed profile V _a in the range, | in which the difference between the acceleration rate curve V and the deceleration rate curve V ^ is greater than 4 volts. ie V. -V. > 4 V ₀ . This area is

θ D et 6

speaks the modes 1 and 2 in Fig. la. The speed curve V according to the invention will now be described in detail below. The time difference (t ^ - t _g ) between the point in time tp, at which the acceleration begins to decrease, and the point in time t,., In which the acceleration becomes 0, is equal to a period of time t, during which the acceleration increases from zero to the maximum value increases, as Fig. 4b shows. (This is quite natural, since the amount of change in the acceleration β is the same in both areas.) Since the gradient of the acceleration rate profile _{is V & Ot 8} , | the difference between the value of the acceleration velocity curve V at «time t ,, in which the acceleration

a j

speed curve V _a intersects the deceleration speed curve VY according to FIG. 4a, and the value of the acceleration speed curve V _& at time tg, in which, according to FIG. 4b, the reduction in acceleration begins as

UO

209823/0116

BAD ORlGtNAL

Due to the fact that the deceleration speed

run V. and the acceleration rate curve V are the same There

Have gradients with the opposite sign, the difference between the two speed curves at SLtpoint t _{o is given} by V. - V = 4 V. Thus, the actual

et U et c

speed curve V, which is shown in Fig. 4a, in the Generate manner that the acceleration begins to decrease when V, - V = 4 V, and is decreased to 0 when oa e

the acceleration speed profile V the deceleration speed profile V. cuts.

In the area in which the difference between the deceleration speed curve V, and the acceleration speed curve V is reduced to the extent that V. - V <4 V a compensation speed curve V is generated, and the difference between the acceleration speed

course V and the compensation speed course V or & c

V "- V is the actual speed curve for a exploited such an area. This area corresponds to mode 5 in Fig. La.

In the deceleration range, the acceleration speed

course V is greater than the deceleration rate course V.. a ο

In the range in which the difference between the acceleration speed profile V and the deceleration speed profile V. is greater than 4 V or V _& - V _fo > 4 V _e , the actual speed profile V coincides with the deceleration speed s profile V i. This area corresponds to modes 6 and 7 in Fig. La.

In the area in which the difference between the acceleration speed curve V _Q and the deceleration speed

Tbsp

longevity curve V. is less than 4 γ or V _Q - V. ^ -4 V, will

O C el D "

209823/01 16

the compensation velocity curve V as in the case of the

acceleration generated, so that the difference between the deceleration _{speed curve} V fo and the compensation _{speed curve V 0} or V ₃₀ - V _{0 is used} as the actual speed curve V for such a range. This area corresponds to mode 5 in Fig. La.

According to the first speed profile shown in FIGS. 4a and 4b, the actual speed profile V begins to slow down at the point in time t ^, at which the deceleration speed profile V intersects the acceleration speed profile V. Therefore, the left part and the right part of the actual speed profile V at time t- are symmetrical due to the fact that the amount of change in acceleration in both parts is the same. Thus, the actual speed profile V during the deceleration, as in the case of acceleration, can be selected as a function of whether the difference V _K −V between the deceleration speed profile V and the acceleration speed profile

V is greater than or less than 4 volts.
ae

The compensation speed curve V used in modes J and 5 is obtained in a manner described below.

th. The difference Δ ν between the acceleration speed curve V and the actual speed curve V

Sl

in the area in which the acceleration decreases linearly as shown in Fig. 4b and the actual speed s curve V is slightly increased, as shown in Fig. 4a, can be calculated by calculating the area of the hatched Partly obtained in Fig. 4b. The difference Δ ν is represented by

Δ V = fß _s (t - t ₂ ) dt

, 2

= 1/2 | S _s (t - t ₂ ) ² (15)

209823/0116

On the other hand, due to the fact that the gradient of the acceleration speed curve V _a OC is ₀ and the

a s

The gradient of the deceleration rate curve V- τ OC is the following equation:

e ^{+ V} a - ^V b - ^{2 £ X} s <* - * 2>
From equations (15) and (16), Λ V is expressed as

= 1/2 β ( _a

rs 4OC ²

I6v _e

It is evident that the Λ V obtained by equation (17) is nothing other than the compensation speed curve V _c itself.

Therefore, the actual speed profile V for mode jj results from

(4v + V - VJ ²

The actual speed profile V for mode 5 results from the equation accordingly

/ 4V + V _H - Vj ²

^V - ^V b - ^V c - ^V b - - (W)

FIGS. 5a and 5b show a second speed profile which includes mode 4. In this case the circumstances are quite different from those according to FIGS. 4a and 4b, since the second speed curve has a corresponding part the nominal speed and therefore it does not

209823/0118

comes to bring the acceleration back to zero at a point at which the acceleration rate curve V exceeds the

hesitation speed curve V. intersects.

As can be seen from Fig. 5a, the value of the acceleration speed profile V at time t, where the nominal

a.?

speed V_ is achieved by the equation

^V a - ^V s - ^V e ^{+ 2V} e = ^V s ^{+ V} e
reproduced. Ä

According to the invention, the speed V _e + V is used as a reference value

s e

taken and the actual Gesohwindigkeitsverlauf V coincides with the accelerating speed curve V when ^V s ^{+ V} e ^{"V a> 2V} e * ^{d 'hg if Va <V} s" ^{V e' The} coming into the mode 3 when the Value of the acceleration rate curve V _Q the level of V - V at time t _o er

egg 5 6 et

is sufficient even if there is a difference of more than 4 V between the acceleration speed profile V and the deceleration speed profile V., ie V _fc − V _a > 4 V _e . In mode 3, a smooth transition to the nominal speed V_ cannot be achieved if the acceleration is not reduced

will. Accordingly, the must by subtracting the f

Equation (15) given Δν of V_ as the actual value obtained Speed curve V can be taken when the difference between the acceleration speed curve V " and the deceleration rate profile V. greater than 4 V or V. - V> 4 V at the point in time at which the value of the Acceleration speed curve V the threshold of V -

a s

V reached.

On the other hand, in this case the following equation applies:

209823/0116

- V _a ).

= Ä _s (t - t ₂ ) (21)

From equations (17) and (21), Δ V results as = 1/2 ß

s ot

(v _e + ν- ν) ²

_e as ₍₂₂₎

The actual speed profile V in this area results accordingly

(V + V- V) ²

^V - ^V a - ^V c '= ^V a ^ä ~

α u d.

In the area in which the values of both speed curves V and V, are greater than V ,, + V, mode 4 occurs, a D se

and the actual speed curve V in this area coincides with the nominal speed V. The mode 5 occurs in the area in which the value of the delay speed curve V, is smaller than V ₀ + V ₀ . The real one

D 5 6

Speed curve V in this area is represented by

(V + V. - Vj ²

V = V. - V '= V. 2 £ § ■

beb 2J-V

as in the case of Modus J.

Figure 6 is a block diagram of one embodiment of the invention for generating the above-described ideal speed curve, and FIG. 7 is a diagram of one in the embodiment 6 used relay circuit.

2098 2 3/0116

In Fig. 6, an acceleration speed curve generating means 1 generates acceleration speed curves V 1 and V _a2 which are the functions of time given by equations (1) and (2). So V, and V _{2 are} expressed by:

^V a2 = « ₅ ^t - V

A deceleration rate waveform generating means 2 generates deceleration rate waveforms V-. and Vo * which are the functions of time resulting from equations (5) and (6). So V _{,, and V. o can be} expressed by

bl at

Sub-level priority means 5 and 4 are for issuing an output suitable, which corresponds to an input of the sub-level between two inputs applied thereto, and adders 5j 6, 8 and 12 add two inputs applied to it. A full wave rectifier 7 has an output which is the absolute value of an applied thereto Input signal is, and diodes 9 and 15 block the Passage of a negative signal. A function generator 10 generates, in response to an input signal χ, an output which

1 2
corresponds to a function ΐ / ΐ6 _ΛΤ - = · χ. A reference signal generation

^v e
means 11 generates a reference signal corresponding to V + V. A

S G

Amplifier 14 acts to double the output from adder 12 Signal. Another reference signal generating means 15 generates a reference signal corresponding to 4 V. One shown in FIG Relay A has make contacts Aa and Aa 'and an interrupt contact Away.

209823/01 16

The system shown in FIG. 6 generates the first speed profile in a manner described below. It is from the related to the Pig. 4a and 4b given description it is clear that in the case of the first speed profile, the difference V. - V between the deceleration speed profile V. and the acceleration rate curve V smaller

ü et

than 4 V before the value of the acceleration speed curve V reaches the value of V - V. Here is the Break contact Ab of relay A in its closed position, since relay A is not powered. In response to the start of the elevator is the value of the acceleration speed curve V_ increased more and more. However, in the

Modes 1 and 2, in which the difference between the deceleration speed curve V, and the acceleration speed

speed curve V ₀ greater than 4 V. so V. - V> 4 V, the ae D ae

Output from full wave rectifier 7 is greater than 4 V, and there will be no output from rectifying diode 9 and therefore also no output from function generator 10 is output.

In the meantime, the sub-level priority means 5 and 4 select the acceleration speed curve V _n , so that

this occurs at the output of the system. If the value of V, - V _{0 is} less than 4 V, since the value of the acceleration

digkeits curve V is further increased, delivers the

The adder 8 has an output corresponding to 4 V _β - [V - V _b |, and the function generator 10 supplies _{an output corresponding to 1/16 i (4 V e} - \ V _& - V ^) ² . Since the sub-level priority means 5 and 4 _{select the lower of the two curves, namely the acceleration speed curve V r} and the deceleration speed curve V., the actual speed curve V that occurs at the output of the system is represented by a value that is obtained by subtracting

T6 v ¹ ^ ^V ~ I ^V " ^V bi) ^{from the} serineer among the values of e

209823/01 16

V _a and V _{b is} obtained. Since the value of the acceleration speed profile V _{Q is} further increased until it is greater than

et

^ _e , no output is emitted from the rectifier diode 9, and the sub-level priority means 3 and 4 now select the deceleration speed profile V., so that this is the actual speed profile at the output of the system

V occurs.

The system shown in Fig. 6 generates the second speed curve in a manner described below. Operation of the system is the same as in the case of the first overall g sehwindigkeitsverlaufs in the areas in which the value of the acceleration speed curve V is smaller than V \ -

el S

V is. In the case of the second speed profile, the relay A is fed to open the interrupter contact Ab and to close the closing contact Aa when the value of the acceleration speed profile V "reaches the level of V ₁ , - V ₀ and yet the difference V. - V between the deceleration speed ts curve V, and the acceleration speed curve V is greater than 4 V _e .

Relay A is combined with relays B and C (not shown), with the output side of the rectifier diode 9 or with the output side of the acceleration speed course generating means 1 are connected and thus form a circle according to FIG. The relay B has a contact Bb, the is closed in response to the occurrence of an output from the rectifier diode 9 and holds itself. The relay C has a contact Ca which is closed at the moment when V = V - V and then back to its open position is forced. Relay A is connected to terminals 16 and 17 connected to a power source. So the relay A is energized when V = V - V, and the contact Bb is in its closed

Q 5 6

209823/01 16

Position due to V, - V> 4 V. Relays A and B turn off

D et 6

their self-holding state in response to the standstill of the elevator on the desired floor. This is how mode 2 begins, when relay A is energized and ends when V = V + V

a s e

is. The acceleration rate curve V _e is given by

el

the sub-level priority means 3 and 4 selected, and the amplifier 14 provides an output corresponding to 2 (V + V -V). As a result, the comparator (adder) 8 provides an output corresponding to 2 (V_ + V - V), and the function generator 10

Il P

supplies an output corresponding to ^ φ (V _e + ^v _a ~ ^v _s ) · Therefore, the actual speed curve V occurring at the output of the system is represented by V _a - ης _v - (V + V _& - V _g ) ² . Mode 4 begins when the ^e values of the acceleration speed s curve s V_ and of the deceleration speed curve V. are greater than Y _Q + V. The sub-level priority means 4 supplies an output corresponding to V_ + V ₀ , and a negative output is emitted by the comparator (adder) 12. So no output is given by the rectifier diode 13, and the comparator (adder) 8 supplies an output corresponding to 4 V with the result that the function generator

10 provides an output corresponding to V and that at the output of the

System occurring actual speed curve V corresponds to the nominal speed V_. In the area where V_ + V >

VJ> V -V, that is, in mode 6, the operation of the system is Xr ß e

similar to that in the case of mode 4, so that the actual speed profile V occurring at the output of the system now corresponds to V - -J ^ (ν + V. - V _ß ) ² . In the range in which VjC is V - V, ie in mode 7, the output from the comparator (adder) 12 is greater than 2V. and the output from the amplifier 14 is greater than 4 volts, with the result that the rectifier diode 9 will not provide any output. In this area, the sub-level priority means 3 and 4 select the deceleration _{speed profile V fe} , and so the actual speed profile V occurring at the output of the system corresponds to the deceleration speed profile V ^.

209823/01 16

In the exemplary embodiment described above, the amount of change in the acceleration is kept constant, and the compensation speed curve V is supplied,

when the difference between the acceleration speed profile V and the deceleration speed profile V i is equal to 4 V. However, these values can be changed appropriately within a certain range. This also applies to the compensation speed curve V _n ^T.

Fig. 8 shows a plurality of first speed profiles P. to Pq and a second speed profile P ₁₀ , which were "generated according to the system according to the invention. From FIG. 8 it can be seen that the speed of the elevator during the deceleration as a function of the relative distance between the floor level on which the elevator is at rest and the desired floor level in the case of the first speed profile is variable.

209823/0116

Claims (1)

Claims 1.i speed curve generator for an elevator controller, characterized by means for generating a monotonically increasing acceleration speed curve, Means for generating a deceleration speed profile, which is a puncture of the distance between the elevator and the desired floor level and decreases monotonically, and means for generating a compensation speed profile, the one puncture of the difference between the acceleration speed curve and the Is the deceleration speed curve and monotonically decreasing, the acceleration speed curve or the Deceleration speed profile as actual speed profile is selected in the range in which the difference between the acceleration speed curve and the deceleration rate profile greater than one is a certain setting, during which by subtracting the compensation speed profile from the acceleration speed profile or the value obtained from the deceleration speed profile as the actual speed profile is selected in the range in which the difference between the acceleration speed profile and the deceleration speed profile is smaller than the specified setting value. 2. Speed profile generator according to claim 1, characterized in that the acceleration speed profile is a puncture of time. 209823/01 16 J5. Speed history generator for an elevator control system, characterized by means for generating an acceleration speed profile which is a function of time and increasing monotonically, means for generating a deceleration rate curve which is a puncture of the Distance from the elevator to a floor and falling monotonously, and means for generating a compensation speed curve » the one puncture of the difference between the acceleration speed curve and the deceleration rate profile and decreases monotonically, wherein the Acceleration speed curve as actual Velocity curve is selected in the area in which the difference between the acceleration speed profile and the deceleration speed profile is greater as a certain value, while the s curve by subtracting the compensation speed from the acceleration speed curve obtained * value as actual Speed curve is selected in the range in which the Differr% z between the acceleration speed curve and the deceleration rate profile is smaller than the determined value. 4. Speed history generator for an elevator control system, characterized by means for generating an acceleration speed profile, which is a puncture of time and increases monotonically, means for producing one Deceleration speed profile, which is a puncture of the Is the distance from the elevator to a floor and drops monotonically, and means for generating a compensation speed curve, the one puncture of the difference between the acceleration speed profile and the deceleration speed profile 1st and decreases monotonously, with the 209823/01 16 * 11 Deceleration speed curve than actual Speed curve in the area is selected in which is the difference between the acceleration speed curve and the deceleration rate profile is greater than a certain value, during that by subtracting the compensation speed profile from the deceleration speed profile obtained value is selected as the actual speed profile in the range in which the difference between the acceleration speed curve and the deceleration speed curve is smaller than is the certain value. 5. Speed history generator for an elevator control system, characterized by means for generating an acceleration speed profile, which is a puncture of time and increases monotonically, means for generating a Deceleration rate curve, which is a function of the Distance from the elevator to a floor and falling monotonically, and means for generating a compensation speed erlaufs that punctures the difference between one first determined speed exceeding the nominal speed and the acceleration speed curve or the deceleration speed profile and decreases monotonically, the by subtracting the compensation speed profile of the smaller value among the values of the acceleration speed and the deceleration speed curve obtained value is selected as the actual speed profile in the area in which the Difference between the acceleration speed curve, which determined the level of a second, lower than that Has reached the nominal speed, 209823/0116 and the deceleration speed curve is not less than a certain set value while the rated speed is selected as the actual speed profile in the range in which the values both of the acceleration speed profile as well as the deceleration speed profile is greater than the value of the first are certain speed. 209823/0116 Lee r side