JP2004295585A - Hysterisis control method and hysterisis controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control value without the need of changing a setting value just by one comparison operation in each hysterisis control section and to detect an input value fluctuation width over control sections while performing hysterisis control. <P>SOLUTION: In ST201, an optional reference value supplying the reference of deciding the present position of a control width is set to the control section which is an input value operation fluctuation width where the hysterisis control section is present at both end parts. In ST202, a difference between the input value of this time and the optional reference value of the previous time is obtained. In ST203 and ST204, the position relation of the input value of this time and the optional reference value of the previous time is detected from a difference result, and an increase/decrease direction from the control value in the control section of the previous time is decided. In ST205, the input value fluctuation width over the control section is obtained from the difference result and the control width in the control section of the previous time. In ST206, the control value (output value) for the input value of this time is obtained from the increase/decrease direction from the control value of the previous time and the input value fluctuation width. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a hysteresis control method and device.
[0002]
[Prior art]
As the hysteresis control device, for example, a device disclosed in Patent Document 1 is known. Hereinafter, the outline will be described with reference to FIG. FIG. 8 is a block diagram showing a configuration example of a conventional hysteresis control device.
[0003]
The hysteresis control device shown in FIG. 8 includes a first signal comparison circuit 801 that compares a magnitude relationship between an input signal value and a set value (input signal value> set value), and a magnitude relationship between the input signal value and the set value (input signal value). Value <setting value), a control circuit 803 that processes the comparison results of the first signal comparison circuit 801 and the second signal comparison circuit 802, and an output value of the control circuit 803. And a signal switching circuit 804 that outputs the signal with hysteresis characteristics.
[0004]
By the way, for example, in a mobile communication system, transmission power control is performed to solve the near-far problem. In this transmission power control, there are a plurality of control sections that are input value operation fluctuation widths. FIG. 9 is a time chart for explaining a control mode assumed when hysteresis control is performed using the hysteresis control device shown in FIG. 8 in a control system having a plurality of control sections.
[0005]
FIG. 9 shows four control sections a, b, c, and d. The control section a is an input value operation fluctuation range including the hysteresis control section A. The control section b is an input value operation fluctuation width including the hysteresis control sections A and B. The control section c is an input value operation fluctuation range including the hysteresis control sections B and C. The control section d is an input value operation fluctuation range including the hysteresis control section C.
[0006]
In the hysteresis control section A, a comparison operation is performed to determine whether or not to transition to an adjacent control section in the control section a maximum value and the control section b minimum value. In the hysteresis control section B, a comparison operation is performed to determine whether or not to transition to an adjacent control section between the control section b maximum value and the control section c minimum value. In the hysteresis control section C, a comparison operation is performed to determine whether or not to transition to an adjacent control section between the control section c maximum value and the control section d minimum value.
[0007]
[Patent Document 1]
JP-A-8-11508 (0009-0020, FIGS. 1-3)
[0008]
[Problems to be solved by the invention]
However, in the above-described hysteresis control method using the conventional hysteresis control device, it is necessary to perform two comparison operations in the hysteresis control section, and change the set value until the control value (output value) of the control section to be shifted is obtained. Must. Also, in order to know the fluctuation of the control section, there is a problem that the input value fluctuation width over the control section cannot be detected unless a difference from the immediately preceding control section is obtained after a desired control value is obtained.
[0009]
The present invention has been made in view of such a point, and in a case where there are a plurality of control sections having an input value operation fluctuation width in which a hysteresis control section exists at both ends, one comparison operation is performed in each hysteresis control section. To provide a hysteresis control method and apparatus that can obtain a control value without changing a set value and that can detect an input value fluctuation width over a control section while performing hysteresis control. With the goal.
[0010]
[Means for Solving the Problems]
The hysteresis control method according to the present invention is a reference for judging a position where the control width exists in the control section in a control system in which there are a plurality of control sections each having an hysteresis control section at both ends and an input value operation fluctuation width. Setting an arbitrary reference value; obtaining a difference between the present input value and the arbitrary reference value in a control section to which the previous input value belongs; and determining whether the present input value and the previous input value belong from the difference result. A step of generating position information indicating a positional relationship with the arbitrary reference value in the control section, and a step of obtaining an input value variation width across the control section from the difference result and the control width in the control section to which the previous input value belongs. Obtaining a control value for the current input value from the input value fluctuation width and the direction of increase or decrease from the control value in the control section to which the previous input value obtained from the position information belongs. And extent, was to be equipped with.
[0011]
According to this method, in a control system in which there are a plurality of control sections that are input value operation fluctuation ranges in which a hysteresis control section exists at both ends, an arbitrary reference value serving as a reference for determining the position of the control width in the control section Set. Then, a difference between the current input value and an arbitrary reference value in the previous input value is obtained, and a positional relationship between the current input value and the arbitrary reference value in the previous input value is detected from the difference result. And the control width in the previous control section and the input value change width across the control section are detected, and the input value fluctuation width from the control value and the input value change width in the previous input value obtained from the detected positional relationship are used in the previous The calculation is performed on the control value (output value) at the input value of (1), and the control value (output value) for the current input value can be obtained. As described above, according to the present invention, in each hysteresis control section, only one comparison operation is required, and the control value can be obtained without changing the set value. In addition, the control is performed while performing the hysteresis control. Input value operation fluctuations over sections can be detected.
[0012]
The hysteresis control device according to the present invention, for a plurality of control sections which are input value operation fluctuation widths in which a hysteresis control section exists at both ends, an arbitrary reference value serving as a reference for judging a position where the control width exists in the control section. A reference value setting means to be set; a difference detection means for obtaining a difference between a current input value and the arbitrary reference value in a control section to which a previous input value belongs; and a current input value based on a difference result obtained by the difference detection means. Position information generating means for generating position information indicating a positional relationship between the control section to which the previous input value belongs and the arbitrary reference value, and control width selecting means for selecting the control width in the control section to which the previous input value belongs And an input value variation width calculation for determining an input value variation width over a control section from the difference result obtained by the difference detection means and the control width selected and output by the control width selection means. And control value output means for obtaining a control value for a current input value from the input value fluctuation width and a direction of increase or decrease from a control value in a control section to which a previous input value obtained from the position information belongs. Take the configuration.
[0013]
According to this configuration, the reference value setting means determines the position of the control width in the control section in a control system in which there are a plurality of control sections that are input value operation fluctuation widths in which the hysteresis control section exists at both ends. Set an arbitrary reference value as a reference. Further, the control width selection means selects and outputs the control width in the previous input value. The difference detecting means receives an arbitrary reference value in the control section to which the previous input value belongs from the reference value setting means and obtains a difference between the reference value setting means and the present input value. A positional relationship between the input value and an arbitrary reference value in a control section to which the previous input value belongs is detected. Further, the input value fluctuation width calculating means detects the input value fluctuation width over the control section from the difference result and the control width selectively output by the control width selecting means. As a result, the control value output means checks the direction of increase / decrease from the control value at the previous input value from the position information, and uses the increase / decrease direction and the input value fluctuation width to determine the control value (output value) at the previous input value. ) To obtain a control value (output value) for the current input value. Therefore, according to the present invention, in each hysteresis control section, only one comparison operation is required, and the control value can be obtained without changing the set value. In addition, the control section can be obtained while performing the hysteresis control. The input value operation fluctuation straddling can be detected.
[0014]
In the hysteresis control device according to the present invention, when the input value operation fluctuation width in the above invention is an arbitrary width in a plurality of control sections, the reference value setting means sets the control section specified by the control section information to a first control section. The arbitrary reference value is set as an arbitrary reference value in a control section to which the previous input value belongs at a position where the control section is divided into a control width and a second control width, and the control width selecting unit performs control specified by the control section information. Outputting a control width determined by the position information among the first control width and the second control width of the section as a control width in a control section to which the previous input value belongs; The control section information is output when the fluctuation width is obtained.
[0015]
According to this configuration, when each control section has an arbitrary fluctuation range, only one comparison operation is required in each hysteresis control section, and the control value can be obtained without changing the set value. At the same time, it is possible to perform a desired hysteresis control in which an input value operation fluctuation over a control section can be detected while performing the hysteresis control.
[0016]
In the hysteresis control device according to the present invention, when the input value operation fluctuation width in the above invention is equal in a plurality of control sections, the reference value setting means divides the control section into two equal control widths. The arbitrary reference value is set at a position as an arbitrary reference value in a control section to which the previous input value belongs, and the control width selecting means sets a control width determined by the position information among the two equal control widths of the control section. A configuration is employed in which the output is output as the control width in the control section to which the previous input value belongs.
[0017]
According to this configuration, since the control width prepared as a selection target can be set such that the control width located on the larger side with respect to the arbitrary reference value and the position control width on the smaller side are held in common in each control section, The control can be performed with two values, that is, a case where the value is higher than an arbitrary reference value and a case where the value is lower than the arbitrary reference value.
[0018]
In the hysteresis control device according to the present invention, when the input value operation fluctuation width in the above invention is equal in a plurality of control sections, the reference value setting means divides the entirety of the plurality of control sections into two equal parts. The arbitrary reference value is set at a position as an arbitrary reference value in the control section to which the previous input value belongs, and the control width selecting means sets one control width indicating the width of the control section to the control section to which the previous input value belongs. Is output as the control width in.
[0019]
According to this configuration, only one arbitrary reference value needs to be set, and only one control width is required to be prepared as a selection target, so that the configuration can be simplified.
[0020]
In the hysteresis control device according to the present invention, in the above invention, the input value variation width calculation means subtracts a control width in a control section to which the previous input value belongs from a difference result obtained by the difference detection means, and performs control. A configuration is employed in which the input value variation width is obtained from the number of subtractions until the width becomes equal to or smaller than the width.
[0021]
According to this configuration, the input value variation width can be obtained from the number of times of subtraction by repeating the subtraction of the control width at the previous input value from the difference result until the difference becomes equal to or less than the control width.
[0022]
In the hysteresis control device according to the present invention, in the above-described invention, the input value variation width calculating means may be a result obtained by dividing a difference result obtained by the difference detecting means by a control width in a control section to which the previous input value belongs. Is used as the input value variation range.
[0023]
According to this configuration, the input value fluctuation width can be obtained by dividing the difference result by the control width at the previous input value.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
The gist of the present invention is that when there are a plurality of control sections that are input value operation fluctuation widths in which a hysteresis control section exists at both ends, only one comparison operation is required in each hysteresis control section, and the setting value is changed. A control value can be obtained without the need, and at the same time, an input value fluctuation width over a control section can be detected while performing hysteresis control.
[0025]
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0026]
(Embodiment 1)
FIG. 1 is a block diagram illustrating a configuration example of a communication device that uses the hysteresis control method according to Embodiment 1 of the present invention for transmission power control.
[0027]
The communication apparatus shown in FIG. 1 includes a wired channel interface unit 101, a transmission baseband unit 102 connected to an output of the wired channel interface unit 101, and a radio unit 103 connected to an output of the transmission baseband unit 102. , An amplifier 104 that amplifies the output of the radio unit 103, and a transmission antenna 105 that radiates the signal amplified by the amplifier 104 into the air.
[0028]
The transmission baseband unit 102 includes a code spreading / multiplexing unit 106 to which the output of the wired channel interface unit 101 is input, a transmission power control unit 107 that receives the output of the code spreading / multiplexing unit 106 and controls the radio unit 103, And a band limiting filter 108 for transmitting the output of the transmission power control unit 107 to the radio unit 103.
[0029]
In the above configuration, in this communication device, the transmission data captured by the wired propagation path interface unit 101 from the wired transmission path is input to the transmission baseband unit 102. In transmission baseband section 102, the input transmission data becomes code-spread and multiplexed transmission data in code spreading / multiplexing section 106, is subjected to power control in transmission power control section 107, and is subjected to band limiting filter 108 Output with restrictions.
[0030]
Then, the transmission data output from the transmission baseband unit 102 is converted into an analog signal by the radio unit 103, the transmission power is controlled according to an instruction from the transmission power control unit 107, and after being amplified by the amplifier 104, Output from the transmitting antenna 105.
[0031]
Here, the transmission power control unit 107 determines which control section the current input value belongs to in the procedure shown in FIG. 2 and FIG. 3 by using an arbitrary reference value in the immediately preceding (previous) input value. Then, a control value for the current input value is determined from the difference between the control value and the control value.
[0032]
Hereinafter, a hysteresis control method used for controlling transmission power in transmission power control section 107 will be described with reference to FIGS. FIG. 2 is a flowchart illustrating a hysteresis control operation performed by the transmission power control unit shown in FIG. FIG. 3 is a time chart specifically explaining the hysteresis control method shown in FIG.
[0033]
In the figure, in step ST201, an arbitrary reference value that gives a reference for judging a position where a control width exists is set in a control section which is an input value operation fluctuation width where a hysteresis control section exists at both ends. This will be described with reference to FIG.
[0034]
FIG. 3 shows four control sections a, b, c, and d as control sections that are input value operation fluctuation widths in which a hysteresis control section exists at both ends. The control section b has a control value (output value) H, the control section c has a control value (output value) I, and the control section d has a control value (output value) J. As shown in the control section c, in each control section, an arbitrary reference value is set at a position where the control section is divided into the control width 1 and the control width 2. A, B, and C shown in control sections a, b, and c in FIG. 3 are hysteresis control sections.
[0035]
In FIG. 3, each control section has an arbitrary width, and the control width 1 and the control width 2 have different sizes (in the illustrated example, control width 1> control width 2). When the control sections have the same width, each control section may be configured with two equal control widths. In addition, a common arbitrary reference value is set at the center position of all control sections, and the width of each control section is set. The control width may be used.
[0036]
In step ST202, a difference between the current input value and an arbitrary reference value in a control section to which the previous input value belongs is determined. FIG. 3 shows that the arbitrary reference value in the previous input value is the arbitrary reference value of the control section c, and the current input value is subtracted from this arbitrary reference value. However, in FIG. 3, the input value this time is shown as an image existing in the control section d. However, in reality, only the “value of the input signal” can be understood, and to which control section Is unknown.
[0037]
In step ST203, position information indicating the positional relationship between the current input value and an arbitrary reference value in the control section to which the previous input value belongs is generated from the difference result. In the example shown in FIG. 3, if the difference result “reference value−input value” is “positive”, the current input value is on the side where the control width 2 exists (in the illustrated example, the arbitrary reference value of the control section c). If the input value is “negative”, the current input value is located on the side where the control width 1 exists (in the illustrated example, on the side smaller than the arbitrary reference value of the control section c). Is detected. Such position information is generated.
[0038]
In step ST204, the direction of increase or decrease from the control value in the control section to which the previous input value belongs is determined from the generated position information.
[0039]
In step ST205, an input value variation width across control sections is obtained from the difference result and the control width in the control section to which the previous input value belongs, and the control section to which the current input value belongs is determined. Here, the control width in the control section to which the previous input value belongs is one of the control widths determined by the position information when the control section includes two control widths. When the control section is constituted by one control width, it is always the one control width regardless of the position information.
[0040]
The input value fluctuation width over the control section can be obtained by the following two methods. (1) It is possible to repeatedly subtract the control width determined by, for example, the position information from the first difference result, and obtain the input value variation width from the number of subtractions when the control width becomes equal to or less than the control width. (2) The division result obtained by dividing the first difference result by, for example, the control width determined by the position information can be directly used as the input value fluctuation width.
[0041]
The case where the input value fluctuation width over the control section is obtained by the method (1) will be described with reference to an example shown in FIG. When the current input value is located on the side where the control width 1 exists in the control section c, one subtraction satisfies the second difference result <the control width 1, so that the current input value belongs to it. The control section is determined as a control section d. Further, when the current input value is located on the side where the control width 2 in the control section c exists, the control section to which the current input value belongs depends on the control section b or Control section a is determined.
[0042]
In step ST206, a control value (output value) for the current input value is obtained from the increase / decrease direction from the control value and the input value fluctuation width in the control section to which the previous input value obtained from the position information belongs.
[0043]
In the example shown in FIG. 3, when the control section c has shifted from the previous control section c to the control section d, the control value J is calculated by performing a calculation in the decreasing direction on the control value I. , A control value H is obtained by performing an operation in the increasing direction on the control value I.
[0044]
Thus, in the hysteresis control method according to the present embodiment, it is possible to determine which control section the current input value belongs to by one comparison operation. In addition, since there is no need to change the set value, it is possible to simplify the device that implements the hysteresis control method according to the present embodiment. Also, the input value fluctuation width over the control section can be detected at the same time. Hereinafter, an apparatus for implementing the above-described hysteresis control method will be specifically described.
[0045]
(Embodiment 2)
FIG. 4 is a block diagram showing a configuration of a hysteresis control device according to Embodiment 2 of the present invention.
[0046]
The hysteresis control device shown in FIG. 4 includes a first difference detection unit 401 that calculates a difference from an arbitrary reference value in a control section between a current input value and a previous input value, A position confirmation unit 402 that detects a positional relationship between a current input value and the arbitrary reference value based on the difference result, and how many control section fluctuations have occurred based on the difference result in the first difference detection unit 401 A control section variation calculator 403 that detects and outputs control section information, and a control width (shown in FIG. 3) based on the control section information from the control section variation calculator 403 and the position information from the position confirmation unit 402. The control width selection unit 404 selects the control width 1 and the control width 2) and outputs the selected control width to the first difference detection unit 401, and the control interval information from the control interval variation calculation unit 403. Defined in the control section A first reference value setting unit 405 that sets an arbitrary reference value (see FIG. 3) to be output to the first difference detection unit 401 and a previous control value indicated by the position information from the position confirmation unit 402 And a control section output unit 406 for obtaining and outputting the current control value from the fluctuation direction obtained by the control section fluctuation calculation unit 403.
[0047]
The operation of the hysteresis control device configured as described above will be described below.
[0048]
Each input value is input to the first difference detection unit 401. Each time an input value is input, the first difference detection unit 401 captures an arbitrary reference value in the control section at the previous input value output by the first reference value setting unit 405, and compares it with the current input value. (Hereinafter, referred to as a “first difference result”) (see FIG. 3) and output to the position confirmation unit 402.
[0049]
When the first difference result is input from the first difference detection unit 401, the position confirmation unit 402 determines, based on the first difference result, an arbitrary reference value of the control value in the control section to which the previous input value belongs and the current input value. A positional relationship with the value (see FIG. 3) is obtained, and the obtained positional information is output to the first control width selecting unit 404 and the control section output unit 406.
[0050]
Further, when the first difference detection unit 401 obtains the first difference result, the first difference detection unit 401 repeatedly subtracts the control width output from the first control width selection unit 404 from the first difference result, and obtains the subtraction result (hereinafter, referred to as the subtraction result). When the “second difference result” becomes equal to or smaller than the control width, the subtraction number and the second difference result are output to the control section fluctuation calculation unit 403.
[0051]
The control section variation calculation unit 403 selects a corresponding control section from the number of subtractions, and determines whether or not the second difference result is equal to or smaller than the control width in the selected control section. Then, if the determination result indicates that the second difference result is equal to or smaller than the control width in the selected control section, the control section variation calculating section 403 outputs control section information indicating the selected control section to the first control width selection section 404. And a first reference value setting unit 405 and a control section output unit 406. If the result of the determination is that the second difference result is not smaller than or equal to the control width in the selected control section, the control section information indicating the previous control section is stored in the first control width selecting section 404 and the first reference value setting section 405. And the control section output unit 406.
[0052]
The first control width selection section 404 selects a control width in the control section based on the control section information from the control section fluctuation calculation section 403 and the position information from the position confirmation section 402, and determines the selected control width. Output to the first difference detection unit 401. The first difference detection unit 401 uses the control width for the next input value.
[0053]
First reference value setting section 405 receives the control section information from control section fluctuation calculation section 403, sets an arbitrary reference value in the control section, and outputs the set arbitrary reference value to first difference detection section 401. . The first difference detection unit 401 uses the arbitrary reference value for the next input value.
[0054]
The control section output unit 406 determines the direction of increase or decrease from the control value in the control section to which the previous input value belongs based on the position information from the position confirmation unit 402, and the input value change width from the control section change calculation unit 403 is If the control value exceeds the control section, the control value in the control section to which the previous input value belongs is subjected to a calculation in the increase / decrease direction, the calculation result is output as the control value in the control section to which the current input value belongs, and the next input It is held as a value control value.
[0055]
As described above, according to the second embodiment, the difference between the current input value and the arbitrary reference value in the control section to which the previous input value belongs is determined, and the control in the control section to which the previous input value belongs from the difference result. An input value fluctuation range from a value can be detected, and a control value can be output according to the detected input value fluctuation range.
[0056]
(Embodiment 3)
FIG. 5 is a block diagram showing a configuration of a hysteresis control device according to Embodiment 3 of the present invention. In FIG. 5, the same reference numerals are given to components that are the same as or equivalent to the configuration shown in FIG. Here, a description will be given focusing on a portion relating to the third embodiment.
[0057]
In the hysteresis control device according to the third embodiment shown in FIG. 5, a second control width selection unit 501 is provided instead of first control width selection unit 404 in the configuration shown in FIG. A second reference value setting unit 502 is provided in place of the value setting unit 405.
[0058]
In FIG. 3, the size of each control section may be the same or different, but the control width 1 and the control width 2 have different sizes. On the other hand, in the third embodiment, each control section has the same size, and the second reference value setting section 502 sets the arbitrary reference position at a position (center position) where each control section has two control widths having the same width. The value is set.
[0059]
Therefore, the second control width selection unit 501 does not select each control section having two control widths, but simply has two control widths commonly applied to each control section. ing.
[0060]
The operation of the hysteresis control device configured as described above will be described below.
[0061]
The second control width selection unit 501 is configured to determine a control width that is smaller than the arbitrary reference value in the control section based on the control section information from the control section fluctuation calculation unit 403 and the position information from the position confirmation unit 402. And the larger control width is selected, and the selected control width is output to the first difference detection unit 401.
[0062]
As described above, according to the present embodiment, even when the two control widths in each control section are equal, the difference between the current input value and the arbitrary reference value in the control section to which the previous input value belongs is determined, and the difference result is obtained. From the control value in the control section to which the previous input value belongs, and the control value can be output according to the detected input value change width.
[0063]
At this time, when the two control widths in each control section are equal to each other, the second control width selection unit 501 determines whether the control width positioned larger than the arbitrary reference value is smaller than the control width positioned smaller than the arbitrary reference value. It is sufficient if there are two control widths, and the control width of the selection target can be small.
[0064]
(Embodiment 4)
FIG. 6 is a block diagram showing a configuration of a hysteresis control device according to Embodiment 4 of the present invention. In FIG. 6, components that are the same as or equivalent to the configuration shown in FIG. 4 are denoted by the same reference numerals. Here, a description will be given focusing on a portion related to the fourth embodiment.
[0065]
In the hysteresis control device according to the fourth embodiment shown in FIG. 6, a third control width selection unit 601 is provided instead of first control width selection unit 404 in the configuration shown in FIG. A third reference value setting unit 602 is provided instead of the value setting unit 405.
[0066]
In FIG. 3, the size of each control section may be the same or different, but the control width 1 and the control width 2 have different sizes. On the other hand, in the fourth embodiment, each control section has the same size, and the third reference value setting section 602 sets an arbitrary reference value at the center position of all control sections.
[0067]
In addition, the third control width selection unit 601 outputs a control width that is always constant regardless of the positional relationship detected by the position confirmation unit 402. That is, since all control sections have the same size, the control width here is the entirety of one control section.
[0068]
The operation of the hysteresis control device configured as described above will be described below.
[0069]
The third control width selection unit 601 outputs to the first difference detection unit 401 a control width that is always constant up to an adjacent control section regardless of the positional relationship detected by the position confirmation unit 402.
[0070]
The first difference detection unit 401 obtains a difference (first difference result) between an arbitrary reference value set by the third reference value setting unit 602 at the center of all control sections and the current input value, and obtains the first difference. The second control result is obtained by subtracting one control width output from the third control width selection unit 601 from the difference result, and each is given to the control section fluctuation calculation unit 403.
[0071]
As described above, according to the fourth embodiment, even when each control section is treated as one and the same control width and the arbitrary reference value is set to the center position value of all control sections, The difference between the input value and the arbitrary reference value in the control section to which the previous input value belongs is obtained, the input value fluctuation range from the control value in the control section to which the previous input value belongs is detected from the difference result, and the detected input is The control value can be output according to the value fluctuation range.
[0072]
At this time, when each control section is treated as one control width having a uniform size and the arbitrary reference value is set to the center value of all control sections, the arbitrary reference value set by the third reference value setting unit 602 is set. Only one value is needed. Further, the third control width selection unit 601 requires only one control width to be selected.
[0073]
(Embodiment 5)
FIG. 7 is a block diagram showing a configuration of a hysteresis control device according to Embodiment 5 of the present invention. In FIG. 7, the same reference numerals are given to components that are the same as or equivalent to the configuration shown in FIG. Here, a description will be given focusing on a portion relating to the fifth embodiment.
[0074]
In the hysteresis control device according to the fifth embodiment shown in FIG. 7, a second difference detection unit 701 is provided instead of first difference detection unit 401 in the configuration shown in FIG. Also, the control section fluctuation calculation section 403 is omitted, and a control section output section 702 is provided instead of the control section output section 406.
[0075]
The second difference detection unit 701 divides the difference between the arbitrary reference value set by the second reference value setting unit 502 and the current input value by the control width output by the second control width selection unit 501. It has become.
[0076]
The control section output unit 702 receives the outputs of the second difference detection unit 701 and the position confirmation unit 402 as inputs. The second reference value setting section 502 obtains control section information from the control section output section 406.
[0077]
The operation of the hysteresis control device configured as described above will be described below.
[0078]
The second difference detection unit 701 obtains a difference (first difference result) between the arbitrary reference value set by the second reference value setting unit 502 and the current input value, and determines the first difference result in the second control. The second difference result is obtained by dividing by the control width output by the width selection unit 501, and the second difference result is provided to the control section output unit 406.
[0079]
The control section output unit 702 determines the direction of increase or decrease from the control value in the control section to which the previous input value belongs based on the position information from the position confirmation unit 402, and determines the second difference result ( The result of the division is taken as the input value variation range, the control section information obtained from the input value variation range is output to the second reference value setting section 502, and the control value in the control section to which the previous input value belongs is increased or decreased. Is performed, the calculation result is output as the current control value, and the result is held as the next input value control value.
[0080]
As described above, according to the fifth embodiment, when the two control widths of each control section are equal, the difference between the current input value and the arbitrary reference value of the previous input value is determined, and the difference result is determined. By dividing by one of the control widths, the input value fluctuation width from the control value in the control section to which the previous input value belongs can be detected, and the control value can be output according to the detected input value fluctuation width. .
[0081]
In the second to fourth embodiments, the input value fluctuation range is obtained by the difference detection unit, but may be directly obtained by the control section fluctuation calculation unit. The method of obtaining the input value fluctuation range by the division operation described in the fifth embodiment can be used in the second to fourth embodiments instead of the subtraction operation.
[0082]
【The invention's effect】
As described above, according to the present invention, when there are a plurality of control sections that are input value operation fluctuation widths in which the hysteresis control sections exist at both ends, only one comparison operation is required in each hysteresis control section. In addition, the control value can be obtained without changing the set value, and the input value fluctuation width over the control section can be detected while performing the hysteresis control.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration example of a communication device that uses a hysteresis control method according to a first embodiment of the present invention for transmission power control.
FIG. 2 is a flowchart illustrating a hysteresis control operation performed by a transmission power control unit illustrated in FIG. 1;
FIG. 3 is a time chart specifically explaining the hysteresis control method shown in FIG. 2;
FIG. 4 is a block diagram showing a configuration of a hysteresis control device according to Embodiment 2 of the present invention.
FIG. 5 is a block diagram showing a configuration of a hysteresis control device according to a third embodiment of the present invention.
FIG. 6 is a block diagram showing a configuration of a hysteresis control device according to a fourth embodiment of the present invention.
FIG. 7 is a block diagram showing a configuration of a hysteresis control device according to Embodiment 5 of the present invention.
FIG. 8 is a block diagram showing a configuration example of a conventional hysteresis control device.
9 is a time chart illustrating a control mode assumed when a hysteresis control device shown in FIG. 8 performs hysteresis control in a control system having a plurality of control sections.
[Explanation of symbols]
101 Wired propagation path interface unit
102 Transmission baseband section
103 Radio unit
104 amplifier
105 transmitting antenna
106 code spreading / multiplexing unit
107 transmission power control unit
108 Band limiting filter
401 First Difference Detection Unit
402 Position confirmation unit
403 Control section fluctuation calculator
404 First control width selection unit
405 First reference value setting unit
406, 702 control section output unit
501 Second control width selection unit
502 Second Reference Value Setting Unit
601 third control width selection unit
602 third reference value setting unit
701 Second difference detection unit

Claims (7)

In a control system in which there are a plurality of control sections that are input value operation fluctuation ranges in which a hysteresis control section exists at both ends, a step of setting an arbitrary reference value serving as a reference for determining an existing position of the control width in the control section, Taking a difference between the present input value and the arbitrary reference value in the control section to which the previous input value belongs; and obtaining the difference between the present input value and the arbitrary reference value in the control section to which the previous input value belongs from the difference result. A step of generating position information indicating a positional relationship; a step of obtaining an input value variation width across a control interval from the difference result and a control width in a control interval to which a previous input value belongs; Obtaining a control value for the current input value from the direction of increase or decrease from the control value in the control section to which the previous input value obtained from the information belongs. Hysteresis control method. Reference value setting means for setting an arbitrary reference value as a reference for judging a position where the control width exists in the control section for a plurality of control sections which are input value operation fluctuation ranges in which a hysteresis control section exists at both ends; A difference detecting means for obtaining a difference between the input value of the input value and the arbitrary reference value in a control section to which a previous input value belongs; and a control section to which a current input value and a previous input value belong from a difference result obtained by the difference detecting means. Position information generating means for generating position information indicating a positional relationship with the arbitrary reference value, a control width selecting means for selecting the control width in a control section to which a previous input value belongs, and the difference detecting means. An input value fluctuation width calculating means for obtaining an input value fluctuation width over a control section from the difference result and the control width selected and output by the control width selection means; and the input value fluctuation width and the position. Hysteretic control apparatus characterized by comprising a control value output means for determining a control value from a decreasing direction of the control value for the current input value in the previous control interval input value belongs derived from distribution. In a case where the input value operation fluctuation width is an arbitrary width in a plurality of control sections, the reference value setting means is provided at a position where the control section specified by the control section information is divided into a first control width and a second control width. The arbitrary reference value is set as an arbitrary reference value in a control section to which the previous input value belongs, and the control width selection unit is configured to determine the first control width and the second control width of the control section specified by the control section information. The control width determined by the position information is output as a control width in a control section to which the previous input value belongs, and the input value change width calculation means outputs the control section information when the input value change width is obtained. 3. The hysteresis control device according to claim 2, wherein: In the case where the input value operation fluctuation width is the same width in a plurality of control sections, the reference value setting means sets the arbitrary reference value at a position where the control section is divided into two equal control widths. The control width is set as an arbitrary reference value in the control section to which the control value belongs, and the control width determined by the position information among the two equal control widths in the control section is set as the control width in the control section to which the previous input value belongs. The hysteresis control device according to claim 2, further comprising: outputting. In the case where the input value operation fluctuation width is the same width in a plurality of control sections, the reference value setting means sets the arbitrary reference value at a position where the entirety of the plurality of control sections is equally divided by the last input value. Setting as an arbitrary reference value in the control section to which the control section belongs, and the control width selection means outputting one control width indicating the width of the control section as the control width in the control section to which the previous input value belongs. The hysteresis control device according to claim 2, wherein The input value variation width calculation means subtracts the control width in the control section to which the previous input value belongs from the difference result obtained by the difference detection means, and calculates the input value variation width from the number of subtractions until the control width becomes equal to or less than the control width. The hysteresis control device according to any one of claims 2 to 5, wherein The input value variation width calculation means may be a result obtained by dividing a difference result obtained by the difference detection means by a control width in a control section to which the previous input value belongs as the input value variation width. The hysteresis control device according to claim 2.

Images