Electric fire stove power control method and system based on PID self-adaptive control

Abstract

The invention discloses an electric fire stove power control method and system based on PID self-adaptive control, and relates to the field of electric fire stove power control. The method comprises the steps that according to the actual temperature change of a pot obtained in real time and the actual power input of the electric fire stove, the pot heat capacity of the pot at the current moment is determined; the heat capacity change rate relative to the previous moment is obtained; based on a self-adaptive PID control algorithm, dynamically adjusting PID parameters of the electric stove according to the heat capacity of the cookware and the heat capacity change rate; determining a power adjustment value of the electric stove according to the adjusted PID parameter and the current temperature error of the electric stove; determining the current calculation power input according to the historical power input of the electric stove at the previous moment and the power adjustment value; based on a power smoothing mechanism, a target power input is determined according to a historical power input and a current calculated power input. The system is suitable for multiple power supply modes such as commercial power, storage batteries and new energy automobile batteries, and the stability and efficiency of the electric fire stove in different application scenes can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric stove power control, and in particular to an electric stove power control method and system based on PID adaptive control. Background Art

[0002] The electric stove uses low-temperature plasma technology to cook through a plasma torch that outputs stable power at multiple points. The working principle of the electric stove relies on energizing the arc, which then ionizes the air to produce ions, and finally achieves stable combustion. At present, the control method of the electric stove is relatively simple, and the power control lacks adaptability. Under different power supply conditions such as mains power supply, mobile battery power supply, and new energy vehicle battery power supply, the electric stove will be affected by voltage fluctuations, power limitations and other factors during the power-on stage, resulting in unstable plasma arc activation and low combustion efficiency.

[0003] The existing power control scheme for electric stoves does not fully consider the adaptability of electric stoves to multiple power sources and the dynamic power control requirements. Therefore, there is an urgent need for a power control scheme for electric stoves that can adapt to multiple power supply modes. Summary of the invention

[0004] The present invention provides an electric stove power control method and system based on PID adaptive control, which can be applicable to various power supply modes such as mains electricity, storage batteries and new energy vehicle batteries, and improve the stability and efficiency of the electric stove in different application scenarios.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: In a first aspect, the present invention provides an electric stove power control method based on PID adaptive control, the method comprising: Determine the heat capacity of the pot at the current moment and the rate of change of the heat capacity relative to the previous moment according to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; Based on an adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate; Determining the power adjustment value of the electric stove according to the adjusted PID parameters and the current temperature error of the electric stove; the current temperature error is the difference between the preset target temperature and the actual temperature of the cooker at the current moment; Determine the current calculated power input according to the acquired historical power input of the electric stove at the last moment and the power adjustment value; Based on a power smoothing mechanism, a target power input is determined according to the historical power input and the currently calculated power input.

[0006] In a possible implementation, the PID parameters include proportional gain parameters; based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the first formula, dynamically adjusting the proportional gain parameter of the electric stove according to the heat capacity of the pot; The first formula is specifically: ; in, ; represents the adjusted proportional gain parameter, Indicates the preset proportional gain reference value, Indicates the preset maximum proportional gain, Indicates the preset intermediate value of heat capacity, Represents the preset steepness parameter of the control curve, Indicates the heat capacity of the cooker at the current moment.

[0007] In a possible implementation, the PID parameters further include integral gain parameters; and dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate based on an adaptive PID control algorithm specifically includes: Based on the second formula, dynamically adjusting the integral gain parameter of the electric stove according to the heat capacity of the pot; The second formula is specifically: ; in, ; represents the adjusted integral gain parameter, Indicates the preset integral gain reference value, and They represent the preset minimum heat capacity value and the preset maximum heat capacity value respectively. and Respectively and The corresponding preset minimum integral gain value and the preset maximum integral gain value.

[0008] In a possible implementation, the PID parameters also include differential gain parameters; based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the third formula, dynamically adjusting the differential gain parameter of the electric stove according to the heat capacity of the pot and the heat capacity change rate; The third formula is specifically: ; in, ; represents the adjusted differential gain parameter, Indicates the preset differential gain reference value; is the first preset function that is negatively correlated with the heat capacity of the cooker, The value of decreases as the heat capacity of the pot increases; is a second preset function that is positively correlated with the rate of change of the heat capacity of the cooker, The value of increases with the increase of the heat capacity change rate of the cookware.

[0009] In a possible implementation, the power adjustment value of the electric stove is determined according to the adjusted PID parameter and the current temperature error of the electric stove as follows: Based on the fourth formula, according to the adjusted proportional gain parameter, integral gain parameter, differential gain parameter and the current temperature error of the electric stove, the power adjustment value of the electric stove is determined; The fourth formula is specifically: ; in, Indicates the current time The power adjustment value, , as well as Respectively represent the current time The adjusted proportional gain parameters, integral gain parameters and differential gain parameters, Indicates the current time The corresponding current temperature error, represents any time in the integration interval [0,t].

[0010] In a possible implementation, the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove are used to determine the pot heat capacity at the current moment and the heat capacity change rate relative to the previous moment, which specifically includes: Based on the fifth formula, the heat capacity of the pot at the current moment is determined according to the nonlinear relationship between the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; the fifth formula is specifically: ; in, Indicates the heat capacity of the pot at the current moment, represents the integral interval [ , ] at any time within Indicates that the electric stove is The actual power input at the moment, Indicates the pot temperature The actual temperature change rate at the moment, Indicates the preset sliding window time length; The change rate of the heat capacity of the cookware at the current moment relative to the heat capacity at the previous moment is determined based on the sixth formula; the sixth formula is specifically: ; in, represents the rate of change of heat capacity, Indicates the heat capacity of the pot at the last moment, Indicates the time interval between the previous moment and the current moment.

[0011] In a possible implementation, based on a power smoothing mechanism, the target power input is determined according to the historical power input and the currently calculated power input, specifically: Based on the seventh formula, the target power input is determined according to the historical power input and the current calculated power input; the seventh formula is specifically: ; in, ; in, represents the target power input, represents the historical power input, Indicates the current computing power input; represents the dynamic adjustment smoothing factor, Indicates the preset maximum adjustment value. Indicates preset adjustment parameters.

[0012] In a second aspect, the present invention provides an electric stove power control system based on PID adaptive control, the system comprising: The first processing unit is used to determine the heat capacity of the pot at a current moment and the rate of change of the heat capacity relative to a previous moment according to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; A second processing unit is used to dynamically adjust the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate based on an adaptive PID control algorithm; a third processing unit, configured to determine a power adjustment value of the electric stove according to the adjusted PID parameter and a current temperature error of the electric stove; the current temperature error being a difference between a preset target temperature and an actual temperature of the cooker at a current moment; a fourth processing unit, configured to determine a current calculated power input according to the acquired historical power input of the electric stove at the last moment and the power adjustment value; The fifth processing unit is configured to determine a target power input according to the historical power input and the currently calculated power input based on a power smoothing mechanism.

[0013] In a possible implementation manner, when the PID parameter includes a proportional gain parameter, the second processing unit is configured to execute: Based on the first formula, dynamically adjusting the proportional gain parameter of the electric stove according to the heat capacity of the pot; The first formula is specifically: ; in, ; represents the adjusted proportional gain parameter, Indicates the preset proportional gain reference value, Indicates the preset maximum proportional gain, Indicates the preset intermediate value of heat capacity, Represents the preset steepness parameter of the control curve, Indicates the heat capacity of the cooker at the current moment.

[0014] In a possible implementation manner, when the PID parameters further include an integral gain parameter, the second processing unit is further configured to execute: Based on the second formula, dynamically adjusting the integral gain parameter of the electric stove according to the heat capacity of the pot; The second formula is specifically: ; in, ; represents the adjusted integral gain parameter, Indicates the preset integral gain reference value, and They represent the preset minimum heat capacity value and the preset maximum heat capacity value respectively. and Respectively and The corresponding preset minimum integral gain value and the preset maximum integral gain value.

[0015] In a possible implementation manner, when the PID parameters further include a differential gain parameter, the second processing unit is further configured to execute: Based on the third formula, dynamically adjusting the differential gain parameter of the electric stove according to the heat capacity of the pot and the heat capacity change rate; The third formula is specifically: ; in, ; represents the adjusted differential gain parameter, Indicates the preset differential gain reference value; is the first preset function that is negatively correlated with the heat capacity of the cooker, The value of decreases as the heat capacity of the pot increases; is a second preset function that is positively correlated with the rate of change of the heat capacity of the cooker, The value of increases with the increase of the heat capacity change rate of the cookware.

[0016] In a possible implementation manner, the third processing unit is specifically configured to execute: Based on the fourth formula, according to the adjusted proportional gain parameter, integral gain parameter, differential gain parameter and the current temperature error of the electric stove, the power adjustment value of the electric stove is determined; The fourth formula is specifically: ; in, Indicates the current time The power adjustment value, , as well as Respectively represent the current time The adjusted proportional gain parameters, integral gain parameters and differential gain parameters, Indicates the current time The corresponding current temperature error, represents any time in the integration interval [0,t].

[0017] In a possible implementation manner, the first processing unit is specifically configured to execute: Based on the fifth formula, the heat capacity of the pot at the current moment is determined according to the nonlinear relationship between the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; the fifth formula is specifically: ; in, Indicates the heat capacity of the pot at the current moment, represents the integral interval [ , ] at any time within Indicates that the electric stove is The actual power input at the moment, Indicates the pot temperature The actual temperature change rate at the moment, Indicates the preset sliding window time length; The change rate of the heat capacity of the cookware at the current moment relative to the heat capacity at the previous moment is determined based on the sixth formula; the sixth formula is specifically: ; in, represents the rate of change of heat capacity, Indicates the heat capacity of the pot at the last moment, Indicates the time interval between the previous moment and the current moment.

[0018] In a possible implementation manner, the fifth processing unit is specifically configured to execute: Based on the seventh formula, the target power input is determined according to the historical power input and the current calculated power input; the seventh formula is specifically: ; in, ; in, represents the target power input, represents the historical power input, Indicates the current computing power input; represents the dynamic adjustment smoothing factor, Indicates the preset maximum adjustment value. Indicates preset adjustment parameters.

[0019] In a third aspect, the present invention provides an electronic device comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement the electric stove power control method based on PID adaptive control as described in any one of the above.

[0020] In a fourth aspect, the present invention provides a computer-readable storage medium, which stores at least one instruction, at least one program, a code set or an instruction set. The at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by a processor to implement the electric stove power control method based on PID adaptive control as described in any one of the above.

[0021] In practical applications, the electric stove power control method based on PID adaptive control provided by an embodiment of the present invention is as follows: first, the heat capacity and the heat capacity change rate of the cooker are dynamically estimated according to the actual temperature change of the cooker obtained in real time during the actual cooking process and the actual power input of the electric stove; secondly, the PID parameters of the electric stove are dynamically adjusted according to the determined heat capacity and heat capacity change rate of the cooker based on the adaptive PID control algorithm; thirdly, the difference between the preset target temperature and the actual temperature of the cooker at the current moment is taken as the current temperature error, and the power adjustment value of the electric stove is determined according to the current temperature error and the adjusted PID parameters; thereafter, the current calculated power input is determined according to the historical power input and the power adjustment value of the electric stove at the previous moment; finally, the historical power input and the current calculated power input are smoothed by the power smoothing mechanism to obtain the target power input. The present invention dynamically estimates the heat capacity and heat capacity change rate of the cooker on the electric stove according to the actual temperature change of the cooker set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove. The present invention adopts an adaptive PID control algorithm to dynamically adjust the PID parameters of the electric stove according to the calculated heat capacity and heat capacity change rate of the cooker, so as to realize accurate control of the power input to the electric stove by different power supply equipment; the present invention adopts a power smoothing mechanism to reduce the fluctuation of power input and make the power input more stable; therefore, the present invention can be applicable to various power supply modes such as mains, batteries and new energy vehicle batteries, so as to improve the stability and efficiency of the electric stove in different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A flowchart of a method for controlling electric stove power based on PID adaptive control provided by an embodiment of the present invention; Figure 2 A structural block diagram of an electric stove power control system based on PID adaptive control provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "multiple" means two or more. In addition, the use of "based on" or "according to" means openness and inclusiveness, because the process, steps, calculations or other actions "based on" or "according to" one or more of the conditions or values ​​may be based on additional conditions or values ​​beyond the described values ​​in practice.

[0025] In order to solve the problem that the existing electric stove power control solution does not fully consider the multi-power adaptability of the electric stove and the power dynamic control requirements, an embodiment of the present invention provides an electric stove power control method and system based on PID adaptive control.

[0026] like Figure 1 As shown, in the first aspect, an embodiment of the present invention provides an electric stove power control method based on PID adaptive control, the method comprising: Step 101: determine the heat capacity of the pot at the current moment and the rate of change of the heat capacity relative to the previous moment according to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove.

[0027] Among them, the actual temperature of the pot can be monitored in real time through a temperature sensor; the actual power input of the electric stove refers to the power input into the electric stove by power supply methods such as AC power, batteries and new energy vehicle batteries, which can be monitored in real time through a power meter.

[0028] The heat capacity of the cooker can be determined by the ratio of the total heat input within a preset time period to the average heat capacity of the cooker within the preset time period, wherein the total heat input within the preset time period can be obtained by integrating the actual power input obtained within the preset time period, and the average heat capacity within the preset time period can be obtained by integrating the actual temperature change rate within the preset time period.

[0029] The heat capacity change rate is used to reflect the dynamic change speed of the heat capacity of the cookware, and is determined by the ratio between the change value of the heat capacity of the cookware and the change time.

[0030] Step 102: Based on the adaptive PID control algorithm, dynamically adjust the PID parameters of the electric stove according to the heat capacity of the cooker and the heat capacity change rate.

[0031] Among them, the adaptive PID control algorithm is a control algorithm that can automatically adjust the parameters of the PID controller to cope with dynamic changes in the system and changes in environmental conditions. PID controllers are widely used in industrial control systems to optimize system performance by adjusting control parameters. The PID controller achieves precise control by using three parts: proportional (P), integral (I), and differential (D). Among them, the proportional (P) is fine-tuned according to the current error, the integral (I) is adjusted according to the accumulated error, and the differential (D) is adjusted according to the error change trend.

[0032] In the embodiment of the present invention, the proportion (P), integral (I), and differential (D) are respectively obtained by proportional gain. , integral gain and differential gain Three parameter controls to meet the control requirements of different cooking stages. Proportional gain is achieved according to the heat capacity of the pot , integral gain Dynamic control; realize differential gain according to the heat capacity and heat capacity change rate of the pot Dynamic control.

[0033] Specifically, in the low heat capacity stage of the electric stove, that is, the rapid heating stage of the electric stove, a larger proportional gain is used. To quickly respond to changes in pot temperature; in the high heat capacity stage of the electric stove, that is, the heat preservation stage of the electric stove, a smaller proportional gain is used To avoid temperature overshoot.

[0034] In the low heat capacity stage of the electric stove, reduce the integral gain To weaken the integral effect and avoid integral saturation; in the high heat capacity stage of the electric stove, enhance the integral gain To eliminate steady-state errors.

[0035] In the low heat capacity stage of the electric stove and when the heat capacity change rate is large, increase the differential gain appropriately. To suppress overshoot; in the high heat capacity stage of the electric stove and when the heat capacity change rate is small, appropriately reduce the differential gain To reduce the impact of noise. Among them, the larger the heat capacity change rate, the faster the electric stove heats up, and the smaller the heat capacity change rate, the more stable the temperature of the electric stove.

[0036] Step 103: determining a power adjustment value of the electric stove according to the adjusted PID parameters and the current temperature error of the electric stove.

[0037] The current temperature error is the difference between the preset target temperature and the actual temperature of the cookware at the current moment.

[0038] Specifically, based on the adaptive PID control algorithm, the proportional gain is dynamically adjusted , integral gain , differential gain And the current temperature error, the power adjustment value of the electric stove can be calculated.

[0039] Step 104 : determining the current calculated power input according to the acquired historical power input of the electric stove at the last moment and the power adjustment value.

[0040] Specifically, the sum of the historical power input of the electric stove at the last moment and the calculated power adjustment value is used as the current calculated power input.

[0041] Step 105: Based on the power smoothing mechanism, determine the target power input according to the historical power input and the current calculated power input.

[0042] Among them, the power smoothing mechanism refers to a control strategy that uses a series of technologies or management means to reduce power fluctuations in the power system and ensure a stable and reliable energy supply.

[0043] In this embodiment, a power smoothing mechanism is introduced to avoid sudden changes in power input caused by switching of cooking stages or external interference, thereby preventing the stability of the cooking process of the electric stove from being affected.

[0044] Specifically, the smoothed target power input is calculated by weighted summing the historical power input and the current calculated power input.

[0045] In practical applications, the electric stove power control method based on PID adaptive control provided by an embodiment of the present invention is as follows: first, the heat capacity and the heat capacity change rate of the cooker are dynamically estimated according to the actual temperature change of the cooker obtained in real time during the actual cooking process and the actual power input of the electric stove; secondly, the PID parameters of the electric stove are dynamically adjusted according to the determined heat capacity and heat capacity change rate of the cooker based on the adaptive PID control algorithm; thirdly, the difference between the preset target temperature and the actual temperature of the cooker at the current moment is taken as the current temperature error, and the power adjustment value of the electric stove is determined according to the current temperature error and the adjusted PID parameters; thereafter, the current calculated power input is determined according to the historical power input and the power adjustment value of the electric stove at the previous moment; finally, the historical power input and the current calculated power input are smoothed by the power smoothing mechanism to obtain the target power input.

[0046] The present invention dynamically estimates the heat capacity and heat capacity change rate of the cooker on the electric stove according to the actual temperature change of the cooker set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove. The present invention adopts an adaptive PID control algorithm to dynamically adjust the PID parameters of the electric stove according to the calculated heat capacity and heat capacity change rate of the cooker, so as to realize accurate control of the power input to the electric stove by different power supply equipment; the present invention adopts a power smoothing mechanism to reduce the fluctuation of power input and make the power input more stable; therefore, the present invention can be applicable to various power supply modes such as mains, batteries and new energy vehicle batteries, so as to improve the stability and efficiency of the electric stove in different application scenarios.

[0047] Furthermore, when the PID parameters include proportional gain parameters, based on the adaptive PID control algorithm, the PID parameters of the electric stove are dynamically adjusted according to the heat capacity of the pot and the heat capacity change rate, specifically including: Based on the first formula, the proportional gain parameter of the electric stove is dynamically adjusted according to the heat capacity of the pot; The first formula is: ; in, ; Represents the adjusted proportional gain parameter; Indicates the preset proportional gain reference value, that is, the initialization proportional gain without considering the dynamic change of the heat capacity of the pot; Indicates the preset maximum proportional gain; Indicates the heat capacity of the cooker at the current moment.

[0048] Indicates the preset middle value of heat capacity, which is the dividing point between low heat capacity and high heat capacity.

[0049] Indicates the preset steepness parameter of the control curve, which determines sensitivity.

[0050] Furthermore, when the PID parameters also include integral gain parameters, based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the second formula, the integral gain parameter of the electric stove is dynamically adjusted according to the heat capacity of the pot; The second formula is: ; in, ; Represents the adjusted integral gain parameter; Indicates the preset integral gain reference value, that is, the initial integral gain when the dynamic change of the heat capacity of the pot is not taken into account.

[0051] and They represent the preset minimum value of heat capacity and the preset maximum value of heat capacity, respectively, and are used to define the range of heat capacity of the cookware; and Respectively and The corresponding preset minimum integral gain value and the preset maximum integral gain value.

[0052] Through this linear function, Keep a low value in the low heat capacity stage to prevent excessive integral accumulation, and gradually increase it in the high heat capacity stage to improve steady-state accuracy.

[0053] Furthermore, when the PID parameters also include differential gain parameters, based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the third formula, the differential gain parameter of the electric stove is dynamically adjusted according to the heat capacity of the pot and the heat capacity change rate; The third formula is: ; in, ; represents the adjusted differential gain parameter, Indicates the preset differential gain reference value.

[0054] is the first preset function that is negatively correlated with the heat capacity of the cooker, The value of decreases as the heat capacity of the pot increases; is a second preset function that is positively correlated with the rate of change of the heat capacity of the cooker, The value of increases with the increase of the heat capacity change rate of the cookware.

[0055] Further, the power adjustment value of the electric stove is determined according to the adjusted PID parameters and the current temperature error of the electric stove as follows: Based on the fourth formula, the power adjustment value of the electric stove is determined according to the adjusted proportional gain parameter, integral gain parameter, differential gain parameter and the current temperature error of the electric stove; The fourth formula is specifically: ; in, Indicates the current time The power adjustment value, , as well as Respectively represent the current time The adjusted proportional gain parameters, integral gain parameters and differential gain parameters, Indicates the current time The corresponding current temperature error, represents any time in the integration interval [0,t].

[0056] Furthermore, in the actual cooking process, the evaporation of liquid in the pot or the addition of ingredients will cause the heat capacity of the pot to change dynamically. In order to dynamically estimate the heat capacity of the pot, the present invention establishes a dynamic model of the change of the heat capacity of the pot over time through the nonlinear relationship between the actual temperature change of the pot and the actual power input of the electric stove.

[0057] According to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove, the heat capacity of the pot at the current moment and the heat capacity change rate relative to the previous moment are determined, specifically including: Based on the fifth formula, the heat capacity of the pot at the current moment is determined according to the nonlinear relationship between the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove.

[0058] The fifth formula is specifically: ; in, Indicates the heat capacity of the pot at the current moment, The base time point for calculating the heat capacity of the cooker.

[0059] Denote the integration interval for the integration variable [ , ] at any time within .

[0060] Indicates that the electric stove is The actual power input at the moment, Indicates the pot temperature The actual temperature change rate at the moment; Indicates the preset sliding window time length, which is used to smooth noise and dynamically capture the changes in the heat capacity of the pot.

[0061] The change rate of the heat capacity of the cookware at the current moment relative to the heat capacity at the previous moment is determined based on the sixth formula; the sixth formula is specifically: ; in, represents the rate of change of heat capacity, Indicates the heat capacity of the pot at the last moment, Indicates the time interval between the previous moment and the current moment.

[0062] Furthermore, based on the power smoothing mechanism, the target power input is determined according to the historical power input and the current calculated power input, specifically: Based on the seventh formula, the target power input is determined according to the historical power input and the current calculated power input; the seventh formula is specifically: ; in, ; in, represents the target power input, represents the historical power input, Indicates the current computing power input; represents the dynamic adjustment smoothing factor, Indicates the preset maximum adjustment value.

[0063] In other words, dynamically adjust the smoothing factor The design principle is that when the heat capacity changes rapidly, Small, allowing power input to change quickly; when the heat capacity changes slowly, Larger, making the power change more gradual.

[0064] Indicates the preset adjustment parameter, which is a preset constant. When the heat capacity change rate is large, reduce , on the contrary, it increases .

[0065] The electric stove power control method based on PID adaptive control of the present invention can automatically switch the power input control strategy based on the changes in the heat capacity and heat capacity change rate of the cooker at different stages of the cooking process. Specifically, in the cooker preheating stage, high power is controlled for rapid heating; when the cooker approaches a preset target temperature, the power is appropriately reduced to achieve precise temperature control; in the cooker heat preservation stage, low power is used to maintain the temperature.

[0066] The electric stove power control method based on PID adaptive control of the present invention adopts an adaptive PID control algorithm to dynamically adjust the power input of the electric stove and realize accurate start-up control of the power of the electric stove.

[0067] The electric stove power control method based on PID adaptive control of the present invention can smooth the power output through a smoothing factor, and can also set overcurrent, undervoltage and temperature protection mechanisms to ensure the safe and stable operation of the electric stove.

[0068] The electric stove power control method based on PID adaptive control of the present invention establishes a dynamic model of the change of the heat capacity of the cooker over time through the nonlinear relationship between the actual temperature change of the cooker and the actual power input of the electric stove, thereby realizing dynamic estimation of the heat capacity of the cooker and the rate of change of the heat capacity, and then according to the heat capacity of the cooker and the rate of change of the heat capacity, realizes adaptive dynamic adjustment of the power input of the electric stove based on the adaptive PID control algorithm, thereby ensuring the efficient and stable operation of the electric stove.

[0069] like Figure 2 As shown, in the second aspect, an embodiment of the present invention provides an electric stove power control system based on PID adaptive control, the system comprising: The first processing unit 201 is used to determine the heat capacity of the pot at a current moment and the heat capacity change rate relative to the previous moment according to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; The second processing unit 202 is used to dynamically adjust the PID parameters of the electric stove according to the heat capacity and heat capacity change rate of the pot based on an adaptive PID control algorithm; The third processing unit 203 is used to determine the power adjustment value of the electric stove according to the adjusted PID parameters and the current temperature error of the electric stove; the current temperature error is the difference between the preset target temperature and the actual temperature of the cooker at the current moment; The fourth processing unit 204 is used to determine the current calculated power input according to the acquired historical power input and power adjustment value of the electric stove at the previous moment; The fifth processing unit 205 is configured to determine a target power input according to the historical power input and the currently calculated power input based on a power smoothing mechanism.

[0070] Further, when the PID parameters include proportional gain parameters, the second processing unit 202 is configured to execute: Based on the first formula, the proportional gain parameter of the electric stove is dynamically adjusted according to the heat capacity of the pot; The first formula is: ; in, ; represents the adjusted proportional gain parameter, Indicates the preset proportional gain reference value, Indicates the preset maximum proportional gain, Indicates the preset intermediate value of heat capacity, Represents the preset steepness parameter of the control curve, Indicates the heat capacity of the cooker at the current moment.

[0071] Further, when the PID parameters also include an integral gain parameter, the second processing unit 202 is further configured to execute: Based on the second formula, the integral gain parameter of the electric stove is dynamically adjusted according to the heat capacity of the pot; The second formula is: ; in, ; represents the adjusted integral gain parameter, Indicates the preset integral gain reference value, and They represent the preset minimum heat capacity value and the preset maximum heat capacity value respectively. and Respectively and The corresponding preset minimum integral gain value and the preset maximum integral gain value.

[0072] Further, when the PID parameters also include a differential gain parameter, the second processing unit 202 is further configured to execute: Based on the third formula, the differential gain parameter of the electric stove is dynamically adjusted according to the heat capacity of the pot and the heat capacity change rate; The third formula is: ; in, ; represents the adjusted differential gain parameter, Indicates the preset differential gain reference value; is the first preset function that is negatively correlated with the heat capacity of the cooker, The value of decreases as the heat capacity of the pot increases; is a second preset function that is positively correlated with the rate of change of the heat capacity of the cooker, The value of increases with the increase of the heat capacity change rate of the cookware.

[0073] Further, the third processing unit 203 is specifically configured to execute: Based on the fourth formula, the power adjustment value of the electric stove is determined according to the adjusted proportional gain parameter, integral gain parameter, differential gain parameter and the current temperature error of the electric stove; The fourth formula is specifically: ; in, Indicates the current time The power adjustment value, , as well as Respectively represent the current time The adjusted proportional gain parameters, integral gain parameters and differential gain parameters, Indicates the current time The corresponding current temperature error, represents any time in the integration interval [0,t].

[0074] Furthermore, the first processing unit 201 is specifically configured to execute: Based on the fifth formula, the heat capacity of the pot at the current moment is determined according to the nonlinear relationship between the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; the fifth formula is specifically: ; in, Indicates the heat capacity of the pot at the current moment, represents the integral interval [ , ] at any time within Indicates that the electric stove is The actual power input at the moment, Indicates the pot temperature The actual temperature change rate at the moment, Indicates the preset sliding window time length; The change rate of the heat capacity of the cookware at the current moment relative to the heat capacity at the previous moment is determined based on the sixth formula; the sixth formula is specifically: ; in, represents the rate of change of heat capacity, Indicates the heat capacity of the pot at the last moment, Indicates the time interval between the previous moment and the current moment.

[0075] Further, the fifth processing unit 205 is specifically configured to execute: Based on the seventh formula, the target power input is determined according to the historical power input and the current calculated power input; the seventh formula is specifically: ; in, ; in, represents the target power input, represents the historical power input, Indicates the current computing power input; represents the dynamic adjustment smoothing factor, Indicates the preset maximum adjustment value. Indicates preset adjustment parameters.

[0076] The electric stove power control system based on PID adaptive control provided in an embodiment of the present invention is used to execute the above-mentioned electric stove power control method based on PID adaptive control, and thus can achieve the same effect as the above-mentioned electric stove power control method based on PID adaptive control.

[0077] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0078] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, at least one program, a code set or an instruction set is loaded and executed by the processor to implement the electric stove power control method based on PID adaptive control in an embodiment of the present invention.

[0079] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, in which at least one instruction, at least one program, a code set or an instruction set is stored, and at least one instruction, at least one program, a code set or an instruction set is loaded and executed by a processor to implement the electric stove power control method based on PID adaptive control in an embodiment of the present invention.

[0080] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode. The computer-readable storage medium can be any available medium that can be accessed by the computer or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0081] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for controlling electric stove power based on PID adaptive control, characterized in that: include: Determine the heat capacity of the pot at the current moment and the rate of change of the heat capacity relative to the previous moment according to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; Based on an adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate; Determining the power adjustment value of the electric stove according to the adjusted PID parameters and the current temperature error of the electric stove; the current temperature error is the difference between the preset target temperature and the actual temperature of the cooker at the current moment; Determine the current calculated power input according to the acquired historical power input of the electric stove at the last moment and the power adjustment value; Based on a power smoothing mechanism, a target power input is determined according to the historical power input and the currently calculated power input.

2. The electric stove power control method based on PID adaptive control according to claim 1, characterized in that: The PID parameters include proportional gain parameters; based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the first formula, dynamically adjusting the proportional gain parameter of the electric stove according to the heat capacity of the pot; The first formula is specifically: ； in, ; represents the adjusted proportional gain parameter, Indicates the preset proportional gain reference value, Indicates the preset maximum proportional gain, Indicates the preset intermediate value of heat capacity, Represents the preset steepness parameter of the control curve, Indicates the heat capacity of the cooker at the current moment.

3. The electric stove power control method based on PID adaptive control according to claim 2, characterized in that: The PID parameters also include integral gain parameters; based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the second formula, dynamically adjusting the integral gain parameter of the electric stove according to the heat capacity of the pot; The second formula is specifically: ； in, ; represents the adjusted integral gain parameter, Indicates the preset integral gain reference value, and They represent the preset minimum heat capacity value and the preset maximum heat capacity value respectively. and Respectively and The corresponding preset minimum integral gain value and the preset maximum integral gain value.

4. The electric stove power control method based on PID adaptive control according to claim 3 is characterized in that: The PID parameters also include differential gain parameters; based on the adaptive PID control algorithm, dynamically adjusting the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate specifically includes: Based on the third formula, dynamically adjusting the differential gain parameter of the electric stove according to the heat capacity of the pot and the heat capacity change rate; The third formula is specifically: ； in, ; represents the adjusted differential gain parameter, Indicates the preset differential gain reference value; is the first preset function that is negatively correlated with the heat capacity of the cooker, The value of decreases as the heat capacity of the pot increases; is a second preset function that is positively correlated with the rate of change of the heat capacity of the cooker, The value of increases with the increase of the heat capacity change rate of the cookware.

5. The electric stove power control method based on PID adaptive control according to claim 4, characterized in that: The power adjustment value of the electric stove is determined according to the adjusted PID parameters and the current temperature error of the electric stove as follows: Based on the fourth formula, according to the adjusted proportional gain parameter, integral gain parameter, differential gain parameter and the current temperature error of the electric stove, the power adjustment value of the electric stove is determined; The fourth formula is specifically: ； in, Indicates the current time The power adjustment value, , as well as Respectively represent the current time The adjusted proportional gain parameters, integral gain parameters and differential gain parameters, Indicates the current time The corresponding current temperature error, represents any time in the integration interval [0,t].

6. The electric stove power control method based on PID adaptive control according to claim 1, characterized in that: According to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove, the heat capacity of the pot at the current moment and the heat capacity change rate relative to the previous moment are determined, specifically including: Based on the fifth formula, the heat capacity of the pot at the current moment is determined according to the nonlinear relationship between the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; the fifth formula is specifically: ； in, Indicates the heat capacity of the pot at the current moment, represents the integral interval [ , ] at any time within Indicates that the electric stove is The actual power input at the moment, Indicates the pot temperature The actual temperature change rate at the moment, Indicates the preset sliding window time length; The change rate of the heat capacity of the cookware at the current moment relative to the heat capacity at the previous moment is determined based on the sixth formula; the sixth formula is specifically: ； in, represents the rate of change of heat capacity, Indicates the heat capacity of the pot at the last moment, Indicates the time interval between the previous moment and the current moment.

7. The electric stove power control method based on PID adaptive control according to claim 1, characterized in that: Based on the power smoothing mechanism, the target power input is determined according to the historical power input and the current calculated power input, specifically: Based on the seventh formula, the target power input is determined according to the historical power input and the current calculated power input; the seventh formula is specifically: ； in, ; in, represents the target power input, represents the historical power input, Indicates the current computing power input; represents the dynamic adjustment smoothing factor, Indicates the preset maximum adjustment value. Indicates preset adjustment parameters.

8. An electric stove power control system based on PID adaptive control, characterized in that: include: The first processing unit is used to determine the heat capacity of the pot at a current moment and the rate of change of the heat capacity relative to a previous moment according to the actual temperature change of the pot set on the electric stove obtained in real time during the cooking process and the actual power input of the electric stove; A second processing unit is used to dynamically adjust the PID parameters of the electric stove according to the heat capacity of the pot and the heat capacity change rate based on an adaptive PID control algorithm; a third processing unit, configured to determine a power adjustment value of the electric stove according to the adjusted PID parameter and a current temperature error of the electric stove; the current temperature error being a difference between a preset target temperature and an actual temperature of the cooker at a current moment; a fourth processing unit, configured to determine a current calculated power input according to the acquired historical power input of the electric stove at the last moment and the power adjustment value; The fifth processing unit is configured to determine a target power input according to the historical power input and the currently calculated power input based on a power smoothing mechanism.

9. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement the electric stove power control method based on PID adaptive control as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: The storage medium stores at least one instruction, at least one program, a code set or an instruction set, and the at least one instruction, the at least one program, the code set or the instruction set are loaded and executed by the processor to implement the electric stove power control method based on PID adaptive control as described in any one of claims 1-7.

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