EP2379786A1 - Verfahren zum steuern eines wäscheverteilbetriebs eines haushaltgeräts zur pflege von wäschestücken - Google Patents
Verfahren zum steuern eines wäscheverteilbetriebs eines haushaltgeräts zur pflege von wäschestückenInfo
- Publication number
- EP2379786A1 EP2379786A1 EP09795374A EP09795374A EP2379786A1 EP 2379786 A1 EP2379786 A1 EP 2379786A1 EP 09795374 A EP09795374 A EP 09795374A EP 09795374 A EP09795374 A EP 09795374A EP 2379786 A1 EP2379786 A1 EP 2379786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum
- laundry
- speed
- laundry items
- determined
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000009826 distribution Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000009471 action Effects 0.000 claims description 24
- 230000010355 oscillation Effects 0.000 claims description 23
- 230000006870 function Effects 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 15
- 238000009987 spinning Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 12
- 230000003247 decreasing effect Effects 0.000 claims description 11
- 238000013528 artificial neural network Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 14
- 238000005406 washing Methods 0.000 description 14
- 230000009466 transformation Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010801 machine learning Methods 0.000 description 2
- 238000009828 non-uniform distribution Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010412 laundry washing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000005293 physical law Methods 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/40—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of centrifugal separation of water from the laundry
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/24—Spin speed; Drum movements
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/26—Imbalance; Noise level
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
- D06F2103/44—Current or voltage
- D06F2103/46—Current or voltage of the motor driving the drum
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/52—Changing sequence of operational steps; Carrying out additional operational steps; Modifying operational steps, e.g. by extending duration of steps
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/54—Changing between normal operation mode and special operation modes, e.g. service mode, component cleaning mode or stand-by mode
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/56—Remaining operation time; Remaining operational cycles
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/48—Preventing or reducing imbalance or noise
Definitions
- the present invention relates to a method for operating a domestic appliance for the care of laundry, in which prior to a transition to a spin operation in a laundry distribution operation, a distribution of the laundry items in an interior of a drum of the household appliance by increasing and / or decreasing a rotational speed of the drum is made ,
- Washing machines usually have an electronically controlled drive. Before a transition to a so-called spin operation, a drum is accelerated over a fixed slow laundry distribution phase or a laundry distribution operation and an unbalance is estimated. In this case, the estimation of the imbalance usually takes place via an engine speed or a loading of the drum or via a power. It is always possible to cancel the spin mode or to influence the further spin cycle.
- methods are known from the prior art in many ways, which are used for measuring and then to reduce the imbalance or to control the spinning operation.
- the publication DE 197 53 382 A1 discloses a method for distributing the laundry items in a drum of a washing machine.
- the distribution of the laundry items is performed by controlling the spin operation of the washing machine, wherein first the position of the imbalance of the drum is determined. The determination of the position of the imbalance can take place at a laundry installation speed. Subsequently, the drum is accelerated or braked depending on the detected position of the unbalance of the drum, so that the laundry items in the drum is redistributed during this acceleration or braking.
- the publication DE 196 16 985 A1 discloses a method for balancing an imbalance occurring when spinning laundry items in a drum of a washing machine.
- a compensating liquid is introduced into drum-side cavities lying essentially in one plane.
- the mass the unbalance and beyond the axial position of the imbalance determined.
- the imbalance compensation is performed.
- a dewatering of washed laundry items in washing machines is done mechanically by spinning.
- the drum of the washing machine rotates at a very high speed, for example, at a speed of 1,200 rev / min, so that the laundry items can rest firmly against an inner wall of the drum. If the items of laundry are distributed unevenly on the inner wall of the drum, then there is an imbalance, wherein the drum and the mechanically connected to the drum parts of the washing machine, in particular a tub or a motor to begin to oscillate.
- These vibrations can be relatively strong, especially in the resonance ranges of the machine, so that the drum can not be raised to the target speed, which in turn can lead to unsatisfactory spin results.
- the distribution of the items of laundry can be influenced in a range of a laundry installation speed by specifically increasing or decreasing the rotational speed of the drum.
- the laundry installation speed is understood to mean a speed at which a centrifugal force acting on the laundry items becomes greater than the gravitational force.
- the speed at which the items of laundry attach to the inner wall of the drum depends strongly on the loading of the drum. By a suitable choice of the speed can thus be targeted a certain proportion of the laundry to be solved, with the laundry then randomly redistribute at the next increase in speed.
- the distribution of the laundry items can therefore be influenced by selectively increasing or decreasing the speed as a function of the position of the imbalance relative to one revolution of the drum.
- the distribution of the laundry items can already be determined during the washing or rinsing phase and optionally influenced.
- the known from the prior art methods for unbalance reduction which exploit the effects shown above, either use a fixed, heuristically determined speed curve or control the speed according to a very simple scheme in which the speed increased by a fixed increment or decrement is lowered if the current imbalance falls below or exceeds an acceptable value.
- One such method is disclosed in WO 00/28128 A1.
- the object of the present invention is to propose a method for operating a domestic appliance for the care of items of laundry, in which measures are taken which ensure a reduction of the imbalance caused by a distribution of the laundry items on an inner wall of a drum.
- a distribution of the laundry items in an interior of a drum of the household appliance by increasing and / or lowering and / or holding a rotational speed of the drum prior to a transition to a spin operation in a laundry distribution operation performed.
- An essential idea is that a degree of concern of the laundry items on an inner wall of the drum is determined as a function of a measured and / or control variable, and increasing and / or lowering and / or holding the speed due to the degree of Concerns of the laundry is made.
- the term household appliance is understood here in particular a washing machine.
- the term also includes other household appliances for the care of items of laundry, such as a dryer or a washer-dryer.
- a basic idea of the present invention is to control the speed of rotation, that is, to increase or decrease the rotational speed, depending on a degree of abutment of the laundry on an inner wall of the drum, the degree of abutment of the laundry is determined as a function of a measured and / or control variable.
- the degree of abutment of the laundry items on the inner wall of the drum may be referred to as a stability of a distribution of the laundry items in the interior of the drum.
- a constellation of the laundry items in the interior of the drum or the stability of the distribution of the laundry items for controlling the further speed sequence of the drum is taken into account.
- the imbalance caused by the distribution of the laundry items can be reduced.
- the transition to the spinning mode or a deceleration of the rotational speed to zero can be understood in particular.
- the speed is kept constant for a certain period of time.
- Such holding the speed is particularly useful when the determined degree of concern of the laundry indicates that there is a nearly stable distribution of laundry.
- the remaining laundry may also invest.
- Such a hold is particularly advantageous if the already created laundry cause no or only a slight imbalance.
- a laundry distribution achieved during the distribution process is not changed again by increasing or decreasing the rotational speed due to inertial forces acting on the laundry items.
- the items of laundry can only be redistributed below the so-called laundry installation speed.
- This line speed depends heavily on the amount of laundry in the drum.
- the laundry items are already applied at low speeds, in particular at 80 U / min, while the laundry items in an axial center of the drum until it reaches much higher speeds, in particular 130 U / min, create.
- Of particular interest is thus to determine for the control of imbalance avoidance, whether the laundry items are already created, because in this case increasing the speed can lead to any redistribution of laundry more. This is shown by the Determining the degree of concern of the laundry or a state of the laundry particularly advantageous.
- an optimal action namely an increase or a lowering or holding the speed of the drum. It may also be advantageous to specify an amount by which the rotational speed during the raising or lowering is changed, and / or a time duration for the holding depending on the degree of concern of the laundry items. For example, increasing by 10 1 / min, increasing by 20 1 / min, holding for 5 s, holding for 10 s, lowering by 10 1 / min, or decreasing by 20 1 / min may be advantageous given actions which are selected depending on the degree of concern of the laundry items. Another action dependent on the degree of concern may also be lowering the speed to zero.
- a size is selected as the measurement and / or control variable, which is a function of an imbalance of the drum caused by the distribution of the laundry items in the drum.
- a motor current and / or an engine power and / or an engine energy and / or a deflection of a tub from a rest position or a displacement signal characterizing the deflection and / or a drum speed and / or a speed are selected as the measurement and / or control variable .
- the stability of the distribution of the laundry items ie the current state of the laundry items, in particular determined from a path signal, which characterizes a deflection of a tub from its rest position.
- a displacement sensor or an acceleration sensor is associated with the tub, which is capable of generating the displacement signal or a variable derived therefrom.
- the stability of the distribution of the laundry items may preferably also be derived from a speed signal or a speed fluctuation.
- a non-uniform distribution or imbalance leads to a harmonic oscillation of the oscillating suspended tub.
- a fixed, ie stable distribution of the laundry generally leads to a harmonic, in particular sinusoidal, course of the path signal or the speed signal, wherein the main frequency of the vibration is given by the speed of the drum.
- Falling laundry leads to it Disturbances on the path signal or speed signal, until finally no harmonious, in particular sinusoidal, oscillation is more recognizable with completely freely movable items of laundry.
- the state of the laundry items or the stability of the distribution of the laundry items or the degree of concern of the laundry items on the inner wall of the drum can thus from a similarity or a correlation of the path signal or a deflection signal to a predetermined harmonic, preferably purely sinusoidal, signal be derived.
- the deflection signal or the path signal of the tub and more precisely of a displacement sensor, is used to assess the distribution of the laundry items.
- caused by the laundry pieces unbalance of the drum is determined, wherein the increasing and / or lowering and / or holding the speed are made in dependence on the determined imbalance.
- the amount by which the speed is changed when increasing or decreasing, and the duration of the holding depending on the determined imbalance can be specified.
- a prediction of a value of the imbalance or an amplitude of the imbalance which would result in the same distribution of the laundry items at a higher rotational speed of the drum, is made.
- the determined value of the unbalance can then be made increasing and / or lowering and / or holding the rotational speed of the drum.
- both the stability of the distribution of the laundry items or the degree of concern of the laundry items and the determined value of the unbalance are used for controlling the speed sequence. This ensures that the laundry items can be distributed more uniformly and better in the drum by deliberately increasing and / or lowering and / holding the speed.
- the unbalance can be assessed by means of a speed fluctuation or the deflection of the tub.
- the unbalance can be determined particularly reliably and accurately by means of the deflection of the tub, because a prediction of the imbalance from the deflection relative to a prediction from the speed fluctuation is less dependent on the mass of the laundry items.
- the measurement of the deflection of the tub in terms of noise is particularly advantageous even at high speeds. That's the deflection of the tub even during acceleration or deceleration of the drum available.
- a position of an imbalance of the drum caused by the laundry items is determined, wherein the raising and / or the lowering and / or the
- An imbalance leads to a sinusoidal course of both the speed and the deflection signal.
- the position of the imbalance can be directly derived from the speed signal, since the speed is minimal due to the gravitational force when the imbalance is at an upper edge of the drum.
- the transition from the laundry distribution operation in the Centrifugal operation or omission of the centrifugal operation is made.
- the rotational speed of the drum in the laundry distribution operation is increased until a speed is reached at which the laundry items rest completely on the inner wall of the drum. If such a speed is reached, preferably the unbalance of the drum can be determined, and it can be determined from this imbalance, whether the transition to the spinning mode or a lowering of the speed should be made.
- a first rotational speed is defined at which a substantially complete contact of the laundry articles with the inner wall of the drum is achieved, the rotational speed being increased up to the first rotational speed.
- a second rotational speed is defined, in particular when the rotational speed is reduced, at which a gravitational force acting on the laundry articles becomes greater than a centrifugal force, the rotational speed being reduced to the second rotational speed. If, after reaching the first rotational speed, ie the rotational speed at which the laundry items completely abut against the inner wall, it is determined that the transition to the centrifugal mode must be omitted, in particular due to an unsatisfactory imbalance or an imbalance forecast, the rotational speed of the drum becomes lowered to the second speed. At the second speed, since the gravitational force acting on the laundry becomes greater than the centrifugal force, the laundry is detached from the inner wall of the drum.
- the rotational speed is increased again.
- an increase in the rotational speed up to the first rotational speed in which the stability of the laundry items is given or in which a substantially complete concern of the laundry items is achieved on the inner wall of the drum, made.
- the distribution of the laundry items is aborted, with the speed being reduced to zero. If, despite the increase of the speed up to the first speed or despite the lowering of the speed down to the second speed, no satisfactory result is achieved, the distribution of the laundry items or the laundry distribution mode is interrupted and the speed is reduced to zero.
- the drum is accelerated in an opposite direction up to a third speed, wherein the third speed is preferably selected smaller than the second speed. If the laundry distribution is aborted, the speed is reduced to zero and then "reversed" in the opposite direction of rotation at the second speed.
- the distribution of the laundry is again made.
- a number of failures of the transition to spinning operation are determined, with the increasing and / or decreasing and / or holding of the speed being made in dependence on the number of failures
- the number of failures is a measure of the number of times a stable but uneven wash distribution has occurred since the last time the speed was reduced to 0.
- an imbalance of the drum caused by the laundry items and / or a number of failures of the transition to spinning operation is the measurement and / or control amount and / or the degree of concern of the laundry items on the inner wall of the drum defining state space, wherein each state of the state space is assigned an action of the household appliance.
- the action of the household appliance is understood to mean, in particular, an increase, a decrease or a holding of the rotational speed, wherein the increase or decrease of the rotational speed can also be understood as a transition to the spinning operation or a termination of the laundry distribution operation.
- the states of the state space are stored in a control unit, in particular a microcontroller, wherein the states of the state space have previously been learned for an optimal control strategy.
- an optimal laundry redistribution strategy is trained by means of a machine learning approach through interaction of an adaptive control unit with the home appliance.
- the learned laundry redistribution strategy indicates the optimum actions, in particular the optimum increase or decrease of the speed, for each laundry constellation or degree of abutment of the laundry items on the inner wall.
- a significant advantage of using a learning approach to determine a good wash redistribution strategy is that a machine learning process can distinguish significantly more states and more actions than a manually determined strategy. For example, the influence of many different speed increments or speed deviations on the laundry distribution can be examined.
- the learning microcontroller is a "reinforcement learning" approach
- the learning microcontroller obtains the following input variables: a strength of the imbalance and / or the degree of concern of the laundry items and / or a position of the imbalance and
- the microcontroller may choose between the following actions: increasing and / or decreasing the speed and / or stopping the distribution of the laundry and / or going into spinning mode.
- the control unit of the household appliance can be designed as an adaptive control unit.
- the state space can be adapted to changes in device-specific parameters, for example, spring and damping constants of the oscillating suspended tub, over the service life of the household appliance.
- the measured and / or control variable has a harmonic oscillation caused by an imbalance, wherein a correlation of a course of the measured and / or control variable with a theoretical predetermined harmonic, preferably purely sinusoidal oscillation is determined, and the degree of abutment the laundry is determined on the inner wall of the drum due to the correlation.
- a displacement signal characterizing a deflection of a tub is selected as the measuring and / or control variable.
- the main frequency of the harmonic oscillation or the sine oscillation in the path signal follows directly from the drum speed. Alternatively, the frequency can also be derived from the path signal.
- the difference represents a measure of stability.
- the smaller the difference the closer the value of stability is to 1.
- the smoother the path signal or the course of the measured and / or control variable the greater the stability.
- a value of the stability of 1 corresponds in particular to a complete concern of the laundry items on the inner wall of the drum.
- a global maximum over a period or a half period of the course of the measurement and / or control variable and a global minimum over the period or half period of the course are determined, the maximum and the minimum follow each other in any order.
- a difference of the course of the measured and / or control variable and the course of the theoretical sinusoidal oscillation is determined, wherein the degree of concern of the laundry items is determined on the inner wall of the drum due to the difference.
- an average deviation is calculated by means of a method of least squares.
- a chronological local zero crossing of the course of the measured and / or control variable is to be understood as meaning, in particular, a point in time at which an average value of the measured and / or control variable, that is to say a direct current component (DC component), is equal to a measured value.
- DC component direct current component
- a sliding window is preferably used.
- a control unit is in particular designed such that it follows the time course of the measured and / or control variable continuously. Alternatively it can be provided that time intervals, in particular each period of the course, are considered separately.
- the stability of the distribution of the laundry items or the degree of concern of the laundry items on the inner wall of the drum based on the similarity of the course of the measured and / or control variable, in particular a deflection signal of a displacement sensor for determining a deflection of a tub or a speed signal, to be determined to a sine wave.
- a deflection signal of a displacement sensor for determining a deflection of a tub or a speed signal to be determined to a sine wave.
- a Fourier transformation in particular a discrete Fourier transformation, in particular a Fast Fourier transformation
- a course of the measured and / or control variable is carried out, and the degree of concern of the laundry items at the Inner wall of the drum is determined as a function of Fourier coefficients.
- the degree of abutment of the laundry on the inner wall of the drum is calculated as a quotient of a sum of weighted magnitudes of the unbalanced Fourier coefficients and a sum of all Fourier coefficients.
- the Fourier coefficients will be smoother. In order to minimize this influence on the calculation of the stability of the distribution of the laundry items or the degree of concern of the laundry items, instead of the sum of all Fourier coefficients, a sum reduced by the sum of the uppermost coefficients can be taken.
- a correlation of a course of the measured and / or control variable over a first period with a course of the measured and / or control variable over a previous second period is determined, and the degree of concern of the laundry items the inner wall of the drum or the stability of the distribution of the laundry items is determined due to the correlation.
- one period corresponds to one complete drum rotation.
- the course of the measured and / or control variable, in particular the path signal a complete drum rotation is compared with the previous revolution. As long as the laundry items do not rest firmly on the inner wall of the drum, these courses will differ.
- the determined correlation corresponds to the stability of the distribution of the laundry items.
- the laundry load can be determined in an advantageous manner.
- centrifugal noise is minimized, a resulting structure-borne noise is reduced, an additional ballast mass is reduced, equipment parts are dimensioned smaller and a drum filling volume can be increased.
- the method is characterized by the fact that it is applicable for different laundry loads or can adjust to the current loading situation. In particular, by an additional observation of a spin time, the strategy of distribution of the laundry items can be set so that no unnecessary time extensions arise.
- FIG. 1 shows an exemplary arrangement for learning a strategy of a distribution of laundry items in a drum of a household appliance for the care of laundry items.
- FIG. 2 shows a state space having a stability and an unbalance, according to an embodiment
- FIG. 3 shows an exemplary course of a rotational speed as a function of time during a laundry dispensing operation and a spinning operation according to an exemplary embodiment
- FIG. 4 shows an enlarged view of a portion of the course according to FIG. 3;
- FIG. 5 shows an exemplary course of a measured and / or control variable with a maximum determined by means of a sliding window
- FIG. 6 shows the course of the measured and / or control variable according to FIG. 5 with a further maximum and a minimum for determining an ideal sine signal; 7 shows exemplary courses of a deflection signal of a
- FIGS. 9 to 13 each show an exemplary course of a path signal of a
- Fig. 14 is a schematic representation of a washing machine.
- Fig. 1 shows an exemplary arrangement for learning a redistribution strategy of laundry items in a household appliance 1 for the care of laundry, in particular a laundry washing machine, again.
- the household appliance 1 with a drum 2 arranged therein and a schematically illustrated learning neurocontroller 3.
- the neurocontroller 3 is understood to mean an adaptive microcontroller which is based on a neural network.
- the arrangement shown in Fig. 1 is designed for a learning control for imbalance avoidance.
- the neurocontroller 3 comprises four inputs 3a to 3d, which are each coupled to a unit 4 to 7.
- Each of the units 4 to 7 receives in the present case via a signal line 8, a deflection signal which is generated by a arranged in the household appliance 1 displacement sensor or acceleration sensor, and which characterizes a deflection of a domestic appliance 1 arranged liquor container 13 from a rest position.
- a deflection signal which is generated by a arranged in the household appliance 1 displacement sensor or acceleration sensor, and which characterizes a deflection of a domestic appliance 1 arranged liquor container 13 from a rest position.
- each of the units 4 to 7 via a further signal line 9, a speed signal which can be generated for example by means of a tachometer or a Hall sensor, and the current speed of the drum 2 reproduces.
- the neurocontroller 3 shown in FIG. 1 is part of a computer not shown in detail, via data and signal lines, such as the signal lines. 8 and 9, to the devices included in the home appliance 1, such as the displacement sensor, the tachometer, and a controller 19 included in the home appliance.
- the neurocontroller 3 may also be comprised by the household appliance 1, preferably by the controller 19 of the household appliance 1.
- a non-illustrated displacement sensor is arranged in the present example, which is able to detect a deflection of the tub 13 from a rest position, and to generate a signal characterizing this deflection.
- this signal is referred to as a path signal.
- the invention also includes alternative arrangements of the sensor, if such a sensor can detect a movement of the tub 3 relative to the housing 1.
- a first unit 4 for predicting an imbalance of the drum 2 at a speed of about 800 U / min is formed.
- This imbalance can be determined either on the basis of the deflection signal or the speed signal.
- the deflection signal of the tub 13 is preferably used, since the prediction of the imbalance from the deflection of the tub 13 is independent of a generally unknown loading of the drum 2.
- the deflection signal is particularly advantageous in terms of noise, especially at higher speeds.
- a second unit 5 is designed to determine a stability of the distribution of the laundry 17 in an interior of the drum 2.
- the stability of the distribution of the laundry 17 may be referred to as a degree of concern of the laundry 17 on an inner wall of the drum 2.
- the stability of the distribution of the laundry items 17 can be determined based on the similarity of the deflection signal or the speed signal to a theoretical sine. This is shown by this Displacement signal significantly more sensitive to unstable laundry distributions. Thus, individual falling laundry items 17 directly lead to disturbances on the deflection signal, so that a reliable and accurate determination of the stability is made possible. The determination of the stability of the distribution of the laundry 17 will be discussed in more detail below.
- a third unit 6 is presently designed to determine a position of the imbalance.
- an unbalance leads to a sinusoidal course of both the speed signal and the deflection signal. From the speed signal can be directly derived the position of the imbalance in the rotating drum 2, since the rotational speed is minimal due to the gravitational force when the imbalance is located at an upper edge of the drum 2.
- the speed signal for determining the position of the imbalance is particularly advantageous.
- a fourth unit 7 is designed to determine a number of failures in the present example.
- the number of failures is a measure of how often since a last lowering of the speed of the drum 2 to zero a stable, but non-uniform distribution of the laundry 17 was present.
- the neurocontroller 3 receives at its inputs 3a to 3d present four inputs, the predicted imbalance, the stability of the distribution of the laundry items 17, the position of the imbalance in the drum 2, and the number of failures.
- the interest is to reduce the imbalance in a centrifugal operation of the household appliance 1.
- the goal for the neurocontroller 3 is to achieve an acceptable distribution of the laundry items 17 within the drum 2 in the shortest possible time.
- the quality of the distribution of the laundry items 17 can be assessed only at stable distribution, ie above an application speed.
- a first way to evaluate the actions of the neurocontroller 3 is to return a neutral score of zero if the distribution of the laundry 17 in the drum 2 is still unstable or there is a stable but uneven distribution.
- a second possibility of evaluating the actions of the neurocontroller 3 is to provide a positive evaluation if a good distribution of the laundry items 17 is given above the application speed.
- the neurocontroller 3 On the basis of the inputs, ie on the basis of the imbalance forecast, the stability, the position of the imbalance and the number of failures, the neurocontroller 3 is able to achieve an optimum Perform action.
- the neurocontroller 3 may choose between increasing the speed by 10 or 20 l / min, decreasing the speed by 10 or 20 l / min, holding the speed, reversing and transitioning to the spin mode, based on the inputs.
- the term reversing is understood here as a lowering of the speed to zero.
- the four inputs ie the predicted imbalance, the stability of the distribution of the items 17, the position of the imbalance and the number of failures represent a state space, the goal being to associate with each state of the state space an optimal action of the neurocontroller 3.
- the optimal action is determined in the present embodiment with the reinforcement learning method.
- FIG. 1 An exemplary state space, consisting of two variables, in this case the imbalance U and the stability S is shown in FIG.
- each state of the state space is assigned an optimal action, whereby this assignment and the optimal selection of the actions are already made in a development phase of the household appliance 1.
- the household appliance 1 is connected to a computer, not shown, which comprises the neurocontroller 3.
- the household appliance 1, a control device 19 may be equipped with such a neuron controller 3. In this case, the household appliance 1 can independently learn an optimal assignment of the actions.
- Fig. 3 shows a curve of a speed n as a function of time t again.
- the course of SoII- speed N S ⁇ ⁇ is a course of an actual speed Ni st as well as a course of a to the actual speed N
- St greater at a low speed n. This is due to the fact that a large unbalance at lower speeds leads to a sinusoidal curve of the speed n.
- a stability of the laundry items 17 is given, that is, if at a speed reached ni the laundry items 17 substantially completely abut the inner wall of the drum 2.
- Ni is understood to be the setpoint speed that is specified by the action “increasing the speed” Stability determined and decided whether the speed is further increased (action “increase the speed”) or already a stable laundry distribution (S close to 1) has been reached ..
- the laundry imbalance is determined or for a given spin Based on the determined imbalance, it is decided whether the centrifugal operation is continued (execution of the action "Transition to spinning mode") or whether the speed is reduced again (execution of the action "Decrease the speed”.) Is the determined imbalance not satisfactory, so the speed is reduced to until at a second rotational speed n 2 is determined on the basis of stability, that the items of laundry have detached 17 (S significantly less than 1). Under N 2, that target speed is understood that due to the action "lowering the speed” is specified. In other words, the second rotational speed n 2 is reached when the gravitational force acting on the laundry 17 becomes larger than a centrifugal force.
- ni a further increase in the speed is made to a speed ni. Again, the degree of concern of the laundry items 17 on the inner wall and the stability and imbalance are evaluated together. If the imbalance already impressed is too great, then n 2 is decelerated again up to a second rotational speed. After reaching the second speed n 2 , the speed n is increased again until the first speed ni has been reached. This increase or decrease of the rotational speed n is shown in FIG.
- a stability "S near 1" is determined by comparison with a predetermined upper limit, for example, S ist is greater than or equal to 0.97, and stability "S significantly less than 1" is determined by comparison with a predetermined lower limit, for example, S less than or equal to 0.75, determined.
- the distribution of the laundry 17 is stopped, ie the speed n is reduced to zero and then the drum 2 is moved in an opposite direction of rotation. In this case, the drum 2 is accelerated up to a third speed n 3 , so that the laundry items 17 are rearranged within the drum 2.
- the speed n 3 is preferably equal to the so-called washing speed. If the laundry items 17 are rearranged, the course of the distribution of the laundry items 17 is again carried out until a predetermined number of distribution attempts is reached.
- the determination of the stability of the distribution of the laundry 17 or the degree of concern of the laundry 17 on the inner wall of the drum 2 is discussed in more detail.
- a temporally global maximum of the rotational speed n is determined by means of a sliding window 8 for determining a start or end of a half and / or full oscillation.
- a temporally global minimum is additionally determined within the window 8, wherein a course of a theoretical sine oscillation is formed by connecting the extrema.
- an amplitude A k of the theoretical sinusoidal oscillation is determined by determining an average value of the rotational speed n.
- the curves of a theoretical sinusoidal oscillation are compared with curves of a deflection signal W of a suds container 13. Based on the deviation then the stability S is determined.
- the stability S is determined.
- the greater the deviation of the waveform of the displacement signal W from the course of the ideal sinusoid the lower the stability S of the distribution of the laundry 17 is.
- a stability S of 0.67 is given ( Figure 7, top), with a stability S of 0.97 given when Laundry items 17 substantially completely against the inner wall of the drum 2 (Fig. 7 below).
- the stability of the distribution of the laundry items 17 can be determined by means of a fast Fourier transformation of data series of a measured and / or control variable, in particular a deflection signal or path signal of a suds container 13. In the present case, stability is calculated from the amounts of Fourier
- the stability corresponds to a quotient of a sum of weighted amounts of the unbalanced Fourier coefficients and a sum of all Fourier coefficients.
- the stability can be determined from the formula below:
- FIG. 8 shows an example course of a rotational speed n in a laundry distribution operation and a centrifugal operation and, moreover, a profile of a deflection signal or of a travel signal W of a suds container 13 as a function of the time t.
- FIG. 9 shows on the left a period of the deflection signal W assigned to the section IX of the course of the rotational speed n.
- the amplitudes A of the determined Fourier coefficients K F are shown on the right.
- the deflection signal W has substantially only one main vibration, with further frequency components being barely recognizable. Consequently, the amplitude A of the first Fourier coefficient K F1 is substantially higher than the amplitudes A of the next Fourier coefficients K F.
- the stability of the items of laundry 17 is close to one, that is to say that the items of laundry 17 lie substantially completely against the inner wall of the drum 2.
- a period of the displacement signal W assigned to the section X of the course of the rotational speed n is shown on the left in FIG. As shown, this course also has at least one further frequency component in addition to the main oscillation, which in fact can be recognized by means of the Fourier coefficients K F (FIG. 10, right).
- the amplitudes A of the two first Fourier coefficients K F1 , K F2 are now significantly larger than the amplitudes A of the further Fourier coefficients K F.
- FIG. 11 shows a period of the deflection signal W assigned to the section X1 of the course of the rotational speed n. This period is compared with the amplitude A of the determined Fourier coefficients K F. As shown, the higher-frequency components of the course of the deflection signal W are significantly larger, which is directly attributable to falling laundry items 17 in the drum 2.
- a period of the displacement signal W assigned to the section XII of the course of the rotational speed n and the amplitude A of the determined Fourier coefficients K F are shown in FIG.
- the main spectral component of the deflection signal W is hardly recognizable. This can be seen not only from the course of the deflection signal W, but also from the amplitude A of the first Fourier coefficient K F1 .
- the second and sixth Fourier coefficients K F2 , K F6 have a significantly higher amplitude A than the remaining Fourier coefficients K F.
- higher-frequency components of the deflection signal W are clearly recognizable.
- the stability S of the distribution of the laundry items 17 or the degree of contact of the laundry items 17 on the inner wall of the drum 2 is very small.
- the data sets that is to say the present case, the deflection signal W for the calculation of the fast Fourier transformation should correspond exactly to one drum revolution or one period. If this is not the case, for example, if the data record is too long, the Fourier coefficients K F are smeared out. Such a case is shown in FIG.
- a sum reduced by a sum of the uppermost coefficients can be taken, for example:
- the scalings indicated in the figures and the parameters or measured values mentioned above for the exemplary embodiment relate to a special embodiment of a washing machine.
- deviating parameters or scalings may apply, which are determined in corresponding tests or can be calculated in accordance with physical laws.
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Abstract
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Priority Applications (1)
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PL09795374T PL2379786T3 (pl) | 2008-12-22 | 2009-12-07 | Sposób sterowania trybem rozkładania prania w urządzeniu gospodarstwa domowego do pielęgnacji sztuk prania |
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DE102008055091A DE102008055091A1 (de) | 2008-12-22 | 2008-12-22 | Verfahren zum Steuern eines Wäscheverteilbetriebs eines Haushaltsgeräts zur Pflege von Wäschestücken |
PCT/EP2009/066530 WO2010072556A1 (de) | 2008-12-22 | 2009-12-07 | Verfahren zum steuern eines wäscheverteilbetriebs eines haushaltgeräts zur pflege von wäschestücken |
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EP2379786A1 true EP2379786A1 (de) | 2011-10-26 |
EP2379786B1 EP2379786B1 (de) | 2012-11-14 |
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EP09795374A Active EP2379786B1 (de) | 2008-12-22 | 2009-12-07 | Verfahren zum steuern eines wäscheverteilbetriebs eines haushaltgeräts zur pflege von wäschestücken |
Country Status (4)
Country | Link |
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EP (1) | EP2379786B1 (de) |
DE (1) | DE102008055091A1 (de) |
PL (1) | PL2379786T3 (de) |
WO (1) | WO2010072556A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2765230A1 (de) | 2013-02-07 | 2014-08-13 | Whirlpool Corporation | Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren |
CN105678319A (zh) * | 2015-12-29 | 2016-06-15 | 青岛海信电器股份有限公司 | 一种洗衣策略确定方法、系统及云服务器、终端 |
CN110046643A (zh) * | 2019-02-11 | 2019-07-23 | 阿里巴巴集团控股有限公司 | 业务参数调优方法以及装置 |
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US8166590B2 (en) | 2009-04-16 | 2012-05-01 | Whirlpool Corporation | Method and apparatus for determining laundry load size |
US8631527B2 (en) | 2009-08-10 | 2014-01-21 | Whirlpool Corporation | Laundry treating appliance with tumble pattern control |
DE102010001845A1 (de) * | 2010-02-11 | 2011-08-11 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Einrichtung zur Überwachung einer im Betrieb schwingenden Vorrichtung eines Haushaltsgeräts, Haushaltsgerät zur Pflege von Wäschestücken sowie Verfahren zum Betreiben eines Haushaltsgeräts |
US8984693B2 (en) | 2010-12-10 | 2015-03-24 | Whirlpool Corporation | Method and apparatus for redistributing an imbalance in a laundry treating appliance |
US9279206B2 (en) | 2011-03-30 | 2016-03-08 | Whirlpool Corporation | Method and apparatus for forming a counterbalance to an imbalance in a laundry treating appliance |
DE102011087644B3 (de) * | 2011-12-02 | 2012-12-13 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Betrieb einer Waschmaschine mit einer verbesserten Schleuderphase |
US9115456B2 (en) | 2011-12-20 | 2015-08-25 | Whirlpool Corporation | Method for detecting satellization speed of clothes load in a horizontal axis laundry treating appliance |
DE102011089107A1 (de) | 2011-12-20 | 2013-06-20 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum Betreiben eines Haushaltsgerätes zur Behandlung darin eingebrachter Gegenstände |
DE102012021747B4 (de) * | 2012-06-26 | 2021-01-28 | Diehl Ako Stiftung & Co. Kg | Verfahren und Vorrichtung zum Erkennen einer Umwucht in einem Wäschebehandlungsgerät |
US8863558B2 (en) * | 2012-07-10 | 2014-10-21 | Whirlpool Corporation | Laundry treating appliance and method of operation |
US8689641B2 (en) | 2012-07-17 | 2014-04-08 | Whirlpool Corporation | Detecting satellization of a laundry load |
DE102013104075A1 (de) * | 2013-04-23 | 2014-10-23 | Miele & Cie. Kg | Verfahren zum Betreiben einer Waschmaschine und Waschmaschine |
DE102017219081A1 (de) * | 2017-10-25 | 2019-04-25 | BSH Hausgeräte GmbH | Verfahren zum Betreiben eines Haushaltsgeräts zur Pflege von Wäschestücken mit Erkennung einer Unwucht anhand von zwei Eingangskanälen sowie Haushaltsgerät |
KR102604224B1 (ko) | 2018-12-11 | 2023-11-21 | 엘지전자 주식회사 | 세탁기 제어방법 |
CN113249928B (zh) * | 2020-02-10 | 2024-02-09 | 青岛海尔洗衣机有限公司 | 衣物处理设备的脱水控制方法及衣物处理设备 |
ES2920484T3 (es) * | 2020-03-02 | 2022-08-04 | Haier Germany Gmbh | Método para estimar un comportamiento de carga en una máquina de tratamiento de ropa |
DE102021126263A1 (de) | 2021-10-11 | 2023-04-13 | Miele & Cie. Kg | Verfahren zum Betreiben eines Reinigungsgeräts, Vorrichtung und Reinigungsgerät mit Vorrichtung |
CN113957659B (zh) * | 2021-12-07 | 2023-04-07 | 四川虹美智能科技有限公司 | 一种滚筒洗衣机的称重方法、装置和滚筒洗衣机 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2765230A1 (de) | 2013-02-07 | 2014-08-13 | Whirlpool Corporation | Verfahren zum Betrieb einer Waschmaschine und Waschmaschine mit solch einem Verfahren |
CN105678319A (zh) * | 2015-12-29 | 2016-06-15 | 青岛海信电器股份有限公司 | 一种洗衣策略确定方法、系统及云服务器、终端 |
CN105678319B (zh) * | 2015-12-29 | 2019-03-05 | 青岛海信电器股份有限公司 | 一种洗衣策略确定方法、系统及云服务器、终端 |
CN110046643A (zh) * | 2019-02-11 | 2019-07-23 | 阿里巴巴集团控股有限公司 | 业务参数调优方法以及装置 |
CN110046643B (zh) * | 2019-02-11 | 2023-06-16 | 创新先进技术有限公司 | 业务参数调优方法以及装置 |
Also Published As
Publication number | Publication date |
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DE102008055091A1 (de) | 2010-06-24 |
EP2379786B1 (de) | 2012-11-14 |
WO2010072556A1 (de) | 2010-07-01 |
PL2379786T3 (pl) | 2013-04-30 |
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