A remote control system for centrifuge dewatering units

Abstract

This invention relates to the field of centrifuge technology, and more particularly to a remote control system for a centrifuge dehydration unit, comprising: a data processing module, including a data acquisition unit for acquiring material separation data and centrifuge operating data respectively; a centrifuge control module, including a modeling unit for constructing a centrifuge operation coupling relationship model based on the material centrifugation characteristics and the operating characteristics; a dehydration response determination module, for determining whether the dynamic responsiveness of the centrifugal dehydration process meets the requirements based on the separation effect deviation rate; a gain adjustment module, for determining the normalized gain adaptive adjustment of the centrifuge operating data based on the response time of sudden changes in centrifuge load; and a rate limit adjustment module, for determining the centrifuge rate limit based on the number of oscillations of the differential speed adjustment strategy per unit time. This invention improves the dynamic responsiveness of the centrifugal dehydration process.

Description

Technical Field

[0001] This invention relates to the field of centrifuge technology, and more particularly to a remote control system for centrifuge dehydration units. Background Technology

[0002] In the field of industrial solid-liquid separation, centrifuge dewatering units are widely used in sludge treatment and chemical production processes. Their operating status directly affects separation efficiency and system stability. With the development of continuous production processes and increasingly complex operating conditions, frequent fluctuations in feed concentration and load changes make real-time sensing and dynamic control of centrifuge operating status a crucial technical foundation for ensuring dewatering effects. Remote control of centrifuges typically requires comprehensive consideration of drum speed, differential speed, and feed parameters. Through the collection and analysis of operating data, optimized control can be achieved while meeting separation requirements. Existing remote control methods are mostly based on fixed control parameters or empirical rules, executing control according to preset logic after model establishment. In actual operation, existing control methods struggle to reflect changes in the centrifuge's internal state in a timely manner, easily leading to problems such as response lag, adjustment oscillations, and deviations in separation effects, affecting control accuracy and stability. Therefore, a remote control system for centrifuge dewatering units is urgently needed. This system should construct a control mechanism that can dynamically adjust according to operating conditions, enabling real-time analysis and adaptive adjustment of multi-source operating data, thereby improving the system's dynamic response capability and operational stability.

[0003] Chinese Patent Publication No. CN103464310A discloses an automatic control method and system for a vibrating centrifuge. The method includes the following steps: 1) starting the vibrating centrifuge and acquiring its operating parameters in real time, including the centrifuge's throughput, material moisture content, vibration amplitude, and operating frequency; 2) calculating the optimal excitation frequency value based on the operating parameters obtained in step 1); 3) adjusting the speed of the vibrating motor using a frequency converter and ensuring the centrifuge operates at the optimal excitation frequency value obtained in step 2); 4) repeating steps 1) to 3) until the centrifuge finishes operation.

[0004] Therefore, it can be seen that the automatic control method and system of the vibratory centrifuge have the problem of insufficient dynamic responsiveness in the centrifugal dehydration process due to the large inertia of the mechanical system and the lag in response to changes in operating conditions caused by the use of serial feedback control based on current parameters. Summary of the Invention

[0005] Therefore, the present invention provides a remote control system for centrifuge dewatering units to overcome the problem in the prior art that the mechanical system has large inertia and lags in response to changes in operating conditions due to the use of serial feedback control based on current parameters, resulting in insufficient dynamic responsiveness of the centrifugal dewatering process.

[0006] To achieve the above objectives, the present invention provides a remote control system for a centrifuge dewatering unit, comprising: The data processing module includes an acquisition unit for acquiring material separation data and centrifuge operation data respectively, and a preprocessing unit connected to the acquisition unit for preprocessing the material separation data and the operation data respectively to obtain material centrifugation characteristics and operation characteristics respectively. The centrifugation control module, which is connected to the data processing module, includes a modeling unit for constructing a centrifugation operation coupling relationship model based on the centrifugation characteristics of the material and the operation characteristics; an analysis unit connected to the modeling unit for analyzing the centrifugation process according to the operation data and the centrifugation operation coupling relationship model to obtain a differential speed adjustment strategy; and an execution unit connected to the analysis unit for adjusting the equipment operation of the centrifuge according to the differential speed adjustment strategy. The dehydration response determination module, which is connected to the centrifugation control module, is used to determine whether the dynamic response of the centrifugation dehydration process meets the requirements based on the separation effect deviation rate. A gain adjustment module, which is connected to the data processing module and the dehydration response determination module respectively, is used to determine the normalized gain adaptive adjustment of the operating data of the activated centrifuge based on the response time of the centrifuge load change. A rate limit adjustment module, which is connected to the centrifugation control module and the gain adjustment module respectively, is used to determine the centrifuge rate limit based on the number of oscillations of the differential speed adjustment strategy per unit time.

[0007] Furthermore, the dehydration response determination module determines that the dynamic responsiveness of the centrifugal dehydration process meets the requirements when the separation effect deviation rate is less than or equal to a preset deviation rate. The dehydration response determination module determines that the dynamic responsiveness of the centrifugal dehydration process does not meet the requirements when the deviation rate of the separation effect is greater than the preset deviation rate.

[0008] Furthermore, if the dynamic responsiveness of the gain adjustment module in response to the centrifugal dehydration process does not meet the requirements, it determines whether the timeliness of the response to the sudden change in material concentration meets the requirements based on the response time of the sudden change in centrifuge load.

[0009] Furthermore, the response time of the gain adjustment module to the sudden change in centrifuge load is less than or equal to a preset first response time, indicating that the timeliness of the response to the sudden change in material concentration meets the requirements. The response time of the gain adjustment module to the sudden change in centrifuge load is longer than the preset first response time, and it is determined that the timeliness of the response to the sudden change in material concentration does not meet the requirements.

[0010] Furthermore, the gain adjustment module responds to the centrifuge load change for a duration greater than the preset first response duration and less than or equal to the preset second response duration, thereby activating the normalized gain adaptive adjustment of the centrifuge's operating data. The gain adjustment module responds to the centrifuge load change for a duration longer than the preset second response duration, initially determining that the adjustment stability of the equipment action does not meet the requirements, and further determining whether the adjustment stability of the equipment action meets the requirements based on the number of oscillations of the differential speed adjustment strategy per unit time.

[0011] Furthermore, the adaptive adjustment of the normalized gain of the activated centrifuge operating data includes: The gain adjustment module is used to process the centrifuge load data in the operating data to obtain the instantaneous load change rate; If the gain adjustment module responds to the instantaneous change rate of the load being less than or equal to a preset instantaneous change rate, it increases the normalized gain of the centrifuge's operating data; If the gain adjustment module responds to the instantaneous change rate of the load being greater than the preset instantaneous change rate, it dynamically adjusts the normalized gain of the centrifuge's operating data.

[0012] Furthermore, the increase in the normalized gain of the centrifuge's operating data is determined by the difference between the response time of the centrifuge load change and the preset first response time.

[0013] Furthermore, when the response time of the rate limiting adjustment module to the sudden change in centrifuge load is greater than the preset second response time, the adjustment stability of the equipment action is determined based on the number of oscillations of the differential speed adjustment strategy per unit time.

[0014] Furthermore, if the number of oscillations of the rate limiting adjustment module in response to the differential adjustment strategy per unit time is less than or equal to the preset number of oscillations, it is determined that the adjustment stability of the device action meets the requirements. The rate limit adjustment module responds when the number of oscillations of the differential speed adjustment strategy per unit time is greater than the preset number of oscillations, determines that the adjustment stability of the equipment action does not meet the requirements, and increases the rate limit of the centrifuge.

[0015] Furthermore, the increase in the centrifuge's rate limit is determined by the difference between the number of oscillations of the differential speed adjustment strategy per unit time and the preset number of oscillations.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The system of the present invention, by setting up a centrifugal dehydration module, a data processing module, a control module, a dehydration response judgment module, a gain adjustment module, and a rate limit adjustment module, determines whether the dynamic responsiveness of the centrifugal dehydration process meets the requirements based on the separation effect deviation rate. Since centrifugal operating data such as feed concentration and drum load will dynamically change during the centrifugal dehydration process, if the equipment's response capability to changes in operating conditions is insufficient, the separation effect will continuously deviate from the target state. By judging the dynamic responsiveness of the centrifugal dehydration process, the centrifuge's ability to track the target separation state under dynamic operating conditions can be quantified, thereby characterizing the quality of its dynamic responsiveness. The normalized gain of the centrifuge's operating data is adjusted according to the response time of sudden changes in centrifuge load. Since sudden changes in centrifuge load usually originate from instantaneous changes in feed material concentration, during the data acquisition and processing process... System filtering results in a smaller amplitude of characteristic changes caused by sudden changes in material concentration, leading to an increase in response time. By adjusting the normalized gain of the centrifuge's operating data, the representation amplitude of concentration change characteristics at the signal layer can be strengthened, improving the system's ability to perceive sudden operating conditions and thus shortening the response delay. The centrifuge's rate limit is adjusted based on the number of oscillations of the differential speed regulation strategy per unit time. During the response to a sudden concentration change, if the control parameters of the differential speed regulation strategy are not properly matched or the actuator has dynamic constraints, repeated correction behavior is likely to occur during the adjustment process, resulting in an increase in the number of oscillations of the differential speed output. This leads to instability in the adjustment process and a delay in the effective response. By increasing the centrifuge's rate limit, the dynamic response constraints of the actuator can be relaxed, improving the continuity and monotonicity of differential speed regulation, reducing the number of oscillations, thereby improving the adjustment stability of the equipment's actions and enhancing the dynamic responsiveness of the centrifugal dehydration process.

[0017] Furthermore, the system described in this invention determines whether the dynamic responsiveness of the centrifugal dehydration process meets the requirements by setting a preset deviation rate. Since the centrifuge operating data such as feed concentration and drum load will change dynamically during the centrifugal dehydration process, if the equipment's response capability to changes in operating conditions is insufficient, the separation effect will continuously deviate from the target state. By judging the dynamic responsiveness of the centrifugal dehydration process, the centrifuge's ability to track the target separation state under dynamic operating conditions can be quantified, thereby characterizing the quality of its dynamic responsiveness and further improving the dynamic responsiveness of the centrifugal dehydration process.

[0018] Furthermore, the system of the present invention adjusts the normalization gain of the centrifuge's operating data by setting a preset first response time and a preset second response time. Since sudden changes in centrifuge load usually originate from instantaneous changes in the concentration of the feed material, during the data acquisition and processing, the system filtering results in a smaller amplitude of the characteristic changes caused by sudden changes in material concentration, leading to an increase in response time. By adjusting the normalization gain of the centrifuge's operating data, the representation amplitude of the concentration change characteristics at the signal layer can be strengthened, improving the system's ability to perceive sudden operating conditions, thereby shortening the response delay and further improving the dynamic responsiveness of the centrifugal dehydration process.

[0019] Furthermore, the system of the present invention adjusts the speed limit of the centrifuge by setting a preset number of oscillations. During the response to sudden concentration changes, if the control parameters of the differential speed adjustment strategy are not properly matched or the actuator has dynamic constraints, repeated correction behavior is likely to occur during the adjustment process, which manifests as an increase in the number of oscillations of the differential speed output, resulting in instability in the adjustment process and a delay in the effective response. By increasing the speed limit of the centrifuge, the dynamic response constraints of the actuator can be relaxed, the continuity and monotonicity of the differential speed adjustment can be improved, the number of oscillations can be reduced, thereby improving the adjustment stability of the equipment action and further improving the dynamic responsiveness of the centrifugal dehydration process. Attached Figure Description

[0020] Figure 1 This is an overall structural block diagram of the remote control system for a centrifuge dehydration unit according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating the process by which the remote control system of a centrifuge dehydration unit determines whether the dynamic response of the centrifugation process meets the requirements, according to an embodiment of the present invention. Figure 3 This is a logic flowchart of the process for determining and activating the normalized gain adaptive adjustment of the centrifuge's operating data in a remote control system for a centrifuge dehydration unit according to an embodiment of the present invention. Figure 4 This is a logic flowchart illustrating the process of determining the centrifuge rate limit in a remote control system for a centrifuge dehydration unit according to an embodiment of the present invention. Detailed Implementation

[0021] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] Please see Figure 1 As shown, it is an overall structural block diagram of the remote control system for a centrifuge dehydration unit according to an embodiment of the present invention.

[0024] This invention provides a remote control system for a centrifuge dehydration unit, comprising: The data processing module includes an acquisition unit for acquiring material separation data and centrifuge operation data respectively, and a preprocessing unit connected to the acquisition unit for preprocessing the material separation data and the operation data respectively to obtain material centrifugation characteristics and operation characteristics respectively. The centrifugation control module, which is connected to the data processing module, includes a modeling unit for constructing a centrifugation operation coupling relationship model based on the centrifugation characteristics of the material and the operation characteristics; an analysis unit connected to the modeling unit for analyzing the centrifugation process according to the operation data and the centrifugation operation coupling relationship model to obtain a differential speed adjustment strategy; and an execution unit connected to the analysis unit for adjusting the equipment operation of the centrifuge according to the differential speed adjustment strategy. The dehydration response determination module, which is connected to the centrifugation control module, is used to determine whether the dynamic response of the centrifugation dehydration process meets the requirements based on the separation effect deviation rate. A gain adjustment module, which is connected to the data processing module and the dehydration response determination module respectively, is used to determine the normalized gain adaptive adjustment of the operating data of the activated centrifuge based on the response time of the centrifuge load change. A rate limit adjustment module, which is connected to the centrifugation control module and the gain adjustment module respectively, is used to determine the centrifuge rate limit based on the number of oscillations of the differential speed adjustment strategy per unit time.

[0025] Specifically, the material separation data includes the material moisture content, the turbidity of the separated liquid, and the material separation efficiency.

[0026] Specifically, the centrifuge's operating data includes motor operating data, feed data, and drum load data.

[0027] Specifically, preprocessing includes cleaning, deduplication, noise reduction, normalization, and feature extraction.

[0028] Specifically, the centrifugation characteristics of materials include moisture content deviation, turbidity mutation index of the separated liquid, and material efficiency change rate.

[0029] Specifically, operating characteristics include motor operating power, feed flow rate fluctuation rate, and material quality per unit batch.

[0030] Specifically, the process of constructing a centrifugal operation coupling relationship model based on the centrifugal characteristics and operational characteristics of materials involves analyzing the correlation or coupling degree between the centrifugal characteristics and operational characteristics of materials, and using regression analysis to establish a centrifugal operation coupling relationship model that characterizes the correspondence between operational status and separation effect.

[0031] Specifically, the centrifugal operation coupling relationship model can be a recursive least squares model, a multivariate regression model, or a fuzzy controller, with the preferred embodiment being the recursive least squares model.

[0032] Specifically, the process of analyzing the centrifugation process based on the operating data and the centrifugation operation coupling model to obtain the differential speed adjustment strategy involves inputting the real-time collected centrifuge operating data into the centrifugation operation coupling model, calculating the predicted value of the separation effect under the current operating state and comparing it with the target separation index to obtain the deviation. Based on the deviation and the rate of change characteristics of the operating data, combined with the coupling coefficient in the model that characterizes the relationship between load and separation effect, the differential speed adjustment direction and adjustment range are determined, and the adjustment rate is constrained to generate the differential speed adjustment strategy.

[0033] Specifically, differential adjustment strategies include amplitude adjustment strategies, rate limiting strategies, and adjustment direction strategies.

[0034] Specifically, the equipment operations of a centrifuge include differential speed regulation, main motor speed regulation, and start / stop control.

[0035] Specifically, the process of adjusting the centrifuge's equipment operation according to the differential speed adjustment strategy involves generating a target differential speed command based on the differential speed adjustment strategy, and dynamically adjusting the centrifuge's drive structure under the constraints of the centrifuge's actual speed limit and differential speed limit, thereby achieving continuous control of the differential speed between the drum and the screw.

[0036] Specifically, the normalized gain of centrifuge operating data is a core coefficient used to characterize the proportion of operating data of different dimensions mapped to a uniform scale.

[0037] Specifically, the centrifuge's rate limit is the maximum allowable change in differential speed regulation per unit time.

[0038] In implementation, the system of this invention includes a centrifugal dehydration module, a data processing module, a control module, a dehydration response judgment module, a gain adjustment module, and a rate limit adjustment module. It determines whether the dynamic responsiveness of the centrifugal dehydration process meets requirements based on the separation effect deviation rate. Since centrifugal operating data such as feed concentration and drum load dynamically change during centrifugal dehydration, insufficient responsiveness to changes in operating conditions can cause a continuous deviation in separation effect from the target state. By judging the dynamic responsiveness of the centrifugal dehydration process, the centrifuge's ability to track the target separation state under dynamic operating conditions can be quantified, thus characterizing the quality of its dynamic responsiveness. The normalized gain of the centrifuge's operating data is adjusted based on the response time of sudden load changes. Since sudden load changes in the centrifuge usually originate from instantaneous changes in feed material concentration, system filtering during data acquisition and processing leads to… The characteristic changes caused by sudden changes in material concentration are relatively small, leading to an increase in response time. By adjusting the normalized gain of the centrifuge's operating data, the representation amplitude of concentration change characteristics at the signal layer can be enhanced, improving the system's ability to perceive sudden operating conditions and thus shortening the response delay. The centrifuge's rate limit is adjusted based on the number of oscillations of the differential speed control strategy per unit time. During the response to a sudden concentration change, if the control parameters of the differential speed control strategy are not properly matched or the actuator has dynamic constraints, repeated correction behavior is likely to occur during the adjustment process, resulting in an increase in the number of oscillations of the differential speed output. This leads to instability in the adjustment process and a delay in the effective response. By increasing the centrifuge's rate limit, the dynamic response constraints of the actuator can be relaxed, improving the continuity and monotonicity of differential speed control, reducing the number of oscillations, thereby improving the adjustment stability of the equipment's actions and enhancing the dynamic responsiveness of the centrifugal dehydration process.

[0039] Please continue reading. Figure 2 As shown, it is a logic flowchart of the process by which the remote control system of the centrifuge dehydration unit of the present invention determines whether the dynamic response of the centrifugation dehydration process meets the requirements.

[0040] Specifically, the dehydration response determination module determines that the dynamic responsiveness of the centrifugal dehydration process meets the requirements when the separation effect deviation rate is less than or equal to a preset deviation rate. The dehydration response determination module determines that the dynamic responsiveness of the centrifugal dehydration process does not meet the requirements when the deviation rate of the separation effect is greater than the preset deviation rate.

[0041] Understandably, in remote control systems used for centrifuge dehydration units, the core logic of using a preset deviation rate to characterize the dynamic responsiveness of the centrifugal dehydration process is to transform the dynamic responsiveness of the centrifugal dehydration process into a quantifiable deviation rate range. The preset deviation rate serves as the dividing line between whether the dynamic responsiveness of the centrifugal dehydration process meets the requirements. The preset deviation rate can be set according to actual operating conditions. The setting of the preset deviation rate aims to ensure the dynamic responsiveness and practicality of the centrifugal dehydration process. Optionally, the preset deviation rate is determined through a limited number of tests by evaluating the dehydration effect of different characterization values ​​on the centrifuge. The determined preset deviation rate should satisfy the condition that it is neither too small nor causes excessive interference to the centrifuge's dehydration process. For example, the preset deviation rate is generally selected within the range of [3%, 5%].

[0042] Preferably, the preset deviation rate is 4% in the preferred embodiment.

[0043] Specifically, the separation effect deviation rate is the ratio of the absolute value of the difference between the actual turbidity and the theoretical turbidity of the filtrate after centrifugation to the theoretical turbidity of the filtrate.

[0044] In practice, the system described in this invention determines whether the dynamic responsiveness of the centrifugal dehydration process meets the requirements by setting a preset deviation rate. Since the centrifuge operating data such as feed concentration and drum load will change dynamically during the centrifugal dehydration process, if the equipment's response capability to changes in operating conditions is insufficient, the separation effect will continuously deviate from the target state. By judging the dynamic responsiveness of the centrifugal dehydration process, the centrifuge's ability to track the target separation state under dynamic operating conditions can be quantified, thereby characterizing the quality of its dynamic responsiveness and further improving the dynamic responsiveness of the centrifugal dehydration process.

[0045] Please continue reading. Figure 3 As shown, it is a logic flowchart of the process of determining and activating the normalized gain adaptive adjustment of the centrifuge's operating data for the remote control system of the centrifuge dehydrator unit according to an embodiment of the present invention.

[0046] Specifically, if the dynamic responsiveness of the gain adjustment module to the centrifugal dehydration process does not meet the requirements, the timely response to the sudden change in material concentration is determined based on the response time of the sudden change in centrifuge load.

[0047] Specifically, the response time of the gain adjustment module to the sudden change in centrifuge load is less than or equal to a preset first response time, and the timeliness of the response to the sudden change in material concentration meets the requirements. The response time of the gain adjustment module to the sudden change in centrifuge load is longer than the preset first response time, and it is determined that the timeliness of the response to the sudden change in material concentration does not meet the requirements.

[0048] Specifically, the gain adjustment module responds to the centrifuge load change with a response time longer than the preset first response time and less than or equal to the preset second response time, thereby activating the normalized gain adaptive adjustment of the centrifuge's operating data. The gain adjustment module responds to the centrifuge load change for a duration longer than the preset second response duration, initially determining that the adjustment stability of the equipment action does not meet the requirements, and further determining whether the adjustment stability of the equipment action meets the requirements based on the number of oscillations of the differential speed adjustment strategy per unit time.

[0049] It is understandable that the preset first response time is shorter than the preset second response time, and the three intervals divided by the preset first and second response times correspond to three different scenarios: The first interval is when the response time to a sudden change in centrifuge load is less than or equal to the preset first response time. The corresponding situation is that the timeliness of the response to the sudden change in material concentration meets the requirements. The second interval is the response time of the centrifuge load change that is greater than the preset first response time and less than or equal to the preset second response time. The corresponding situation is: due to the influence of factors such as power generation fluctuation and communication initialization delay during the positioning start-up process, the acquisition of location information fails frequently, causing the power supply path to start and stop repeatedly, reducing the overall start-up stability. The third interval is when the response time of a sudden change in centrifuge load is longer than the preset second response time. The corresponding situation is that during actual operation or start-up and shutdown, the thermal stress vibration of the structural components caused by temperature changes is superimposed on the mechanical vibration signal of normal operation, resulting in a false trigger wake-up signal.

[0050] Understandably, in remote control systems used for centrifuge dewatering units, the timeliness of response to sudden changes in material concentration is characterized by preset first and second response durations. The core logic is to transform start-up stability into a quantifiable response duration range. The preset first response duration serves as the dividing line for determining whether the timeliness of the response to sudden changes in material concentration meets requirements, while the preset second response duration serves as the dividing line for distinguishing the underlying causes of non-compliance in the timeliness of the response to sudden changes in material concentration, providing a quantitative basis for graded adjustment. The preset first and second response durations can be set according to actual operating conditions. The setting of the preset first and second response durations aims to ensure the dynamic responsiveness and practicality of the centrifugal dewatering process. Optionally, the preset first and second response durations are determined through a limited number of experiments by evaluating the dewatering effect of different response durations on the centrifuge. The determined preset first and second response durations should be neither too small nor cause excessive interference to the centrifuge's dewatering process. For example, the preset first response time is generally selected in the range of [2.9s, 3.1s], and the preset second response time is generally selected in the range of [4.9s, 5.1s].

[0051] Preferably, the first response duration is 3 seconds, and the second response duration is 5 seconds.

[0052] Specifically, the response time for a sudden change in centrifuge load is the interval between the moment the centrifuge load changes and the moment the differential speed control strategy is executed.

[0053] Specifically, the adaptive adjustment of the normalized gain of the activated centrifuge operating data includes: The gain adjustment module is used to process the centrifuge load data in the operating data to obtain the instantaneous load change rate; If the gain adjustment module responds to the instantaneous change rate of the load being less than or equal to a preset instantaneous change rate, it increases the normalized gain of the centrifuge's operating data; If the gain adjustment module responds to the instantaneous change rate of the load being greater than the preset instantaneous change rate, it dynamically adjusts the normalized gain of the centrifuge's operating data.

[0054] Specifically, the process of processing the centrifuge load data in the operating data to obtain the instantaneous load change rate involves sequentially performing median filtering, outlier removal, and timestamp verification on the data in the operating data that can reflect the centrifuge load to obtain the load signal, and then calculating the first-order difference of the load signal as the instantaneous load change rate.

[0055] Specifically, the data reflecting the centrifuge load includes the centrifuge main motor current data, drum torque data, and feed flow rate data, with the preferred embodiment being the centrifuge main motor current data.

[0056] Specifically, the preset instantaneous change rate is twice the average load change rate during the steady-state operation of the centrifuge.

[0057] Specifically, the process of dynamically adjusting the normalized gain of the centrifuge's operating data involves increasing the normalized gain of the centrifuge's operating data to twice its original value and setting the maximum allowable adjustment range of the centrifuge's differential speed adjustment command to 3% of the current differential speed. Based on the above adjustment, the normalized gain is maintained for a preset duration. After the maintenance period ends, the normalized gain decreases linearly to the initial value in fixed steps within the callback duration. Optionally, those skilled in the art can increase the normalized gain of the centrifuge's operating data by 2-3 times according to the actual situation. As for the preset duration, those skilled in the art can maintain it for 1-1.5 seconds according to the actual situation.

[0058] Specifically, the normalization gain of centrifuge operating data is common knowledge well known to those skilled in the art, and will not be elaborated here. The normalization gain is generally selected in the range of [0.8, 1.2].

[0059] Preferably, the preferred embodiment of the normalized gain of the centrifuge operating data is 1.

[0060] Specifically, the fixed step size is the ratio of the difference between the increased normalized gain and the initial normalized gain to the number of callback steps.

[0061] Specifically, the number of callback steps is generally selected in the range of [10 steps, 200 steps], and its value is determined based on the ratio of the callback duration to the data sampling period of the control system in the actual situation.

[0062] Specifically, the preset duration is equal to the callback duration, and the value of the hold duration is determined by the noise reduction filtering time constant during the preprocessing. Preferably, the hold duration is twice the noise reduction filtering time constant.

[0063] Specifically, the noise reduction filtering time constant is determined by the filter type.

[0064] Specifically, the increase in the normalized gain of the centrifuge's operating data is determined by the difference between the response time of a sudden change in centrifuge load and a preset first response time.

[0065] Specifically, when the difference between the response time of a sudden change in centrifuge load and the preset first response time is within 10ms, the normalization gain of the centrifuge's operating data increases to 1.1 times the original value. When the difference exceeds 10ms, in addition to increasing to 1.1 times the original value, the normalization gain of the centrifuge's operating data increases by 0.03 for every 5ms exceeding the original value. For example, when the difference between the response time of a sudden change in centrifuge load and the preset first response time is 20ms, the normalization gain of the current centrifuge's operating data is 1, and the increased normalization gain of the centrifuge's operating data is 1×1.1+0.03×2=1.17.

[0066] In practice, the system of the present invention adjusts the normalization gain of the centrifuge's operating data by setting a preset first response time and a preset second response time. Since sudden changes in centrifuge load usually originate from instantaneous changes in the concentration of the feed material, during the data acquisition and processing, the system filtering results in a smaller amplitude of the characteristic changes caused by sudden changes in material concentration, leading to an increase in response time. By adjusting the normalization gain of the centrifuge's operating data, the representation amplitude of the concentration change characteristics at the signal layer can be strengthened, improving the system's ability to perceive sudden operating conditions, thereby shortening the response delay and further improving the dynamic responsiveness of the centrifugal dehydration process.

[0067] Please continue reading. Figure 4 The diagram shown is a logic flowchart of the process for determining the speed limit of a centrifuge in a remote control system for a centrifuge dehydration unit according to an embodiment of the present invention.

[0068] Specifically, when the response time of the rate limiting adjustment module to the sudden change in centrifuge load is longer than the preset second response time, the adjustment stability of the equipment action is determined based on the number of oscillations of the differential speed adjustment strategy per unit time.

[0069] Specifically, if the number of oscillations of the rate limiting adjustment module in response to the differential adjustment strategy per unit time is less than or equal to the preset number of oscillations, it is determined that the adjustment stability of the device action meets the requirements. The rate limit adjustment module responds when the number of oscillations of the differential speed adjustment strategy per unit time is greater than the preset number of oscillations, determines that the adjustment stability of the equipment action does not meet the requirements, and increases the rate limit of the centrifuge.

[0070] It is understandable that the two intervals divided by the preset number of oscillations correspond to two different cases: The first interval is when the number of oscillations of the differential speed adjustment strategy per unit time is less than or equal to the preset number of oscillations. The corresponding situation is: the adjustment stability of the equipment action is determined to meet the requirements. The second interval is when the number of oscillations of the differential speed regulation strategy per unit time is greater than the preset number of oscillations. The corresponding situation is that during actual operation or start-up and shutdown of the equipment, the thermal stress vibration of the structural components caused by temperature changes is superimposed on the mechanical vibration signal of normal operation, resulting in a false trigger wake-up signal.

[0071] Understandably, in remote control systems used for centrifuge dehydration units, the preset oscillation frequency characterizes the stability of equipment operation. The core logic is to transform the stability of equipment operation into a quantifiable range of oscillation frequencies for the differential speed control strategy per unit time. The preset oscillation frequency serves as the dividing line between whether the stability of equipment operation meets requirements. The preset oscillation frequency can be set according to actual operating conditions. The setting of the preset oscillation frequency aims to ensure the dynamic responsiveness and practicality of the centrifugal dehydration process. Optionally, the preset oscillation frequency is determined through a limited number of tests by evaluating the dehydration effect of different fluctuation amplitudes on the centrifuge. The determined preset oscillation frequency should be neither too low nor cause excessive interference to the centrifuge's dehydration process. For example, the preset oscillation frequency is generally selected within the range of [0.5 times / s, 3.5 times / s].

[0072] Preferably, the preferred embodiment of the preset oscillation frequency is 2 times / s.

[0073] Specifically, the number of oscillations of the differential speed control strategy per unit time is the number of times the centrifuge differential speed control strategy undergoes reverse changes per unit time.

[0074] Specifically, the increase in the centrifuge's rate limit is determined by the difference between the number of oscillations of the differential speed adjustment strategy per unit time and the preset number of oscillations.

[0075] Specifically, when the difference between the number of oscillations of the differential speed control strategy per unit time and the preset number of oscillations is within 2 times / s, the centrifuge speed limit is increased to 1.1 times the original value. When the difference between the number of oscillations of the differential speed control strategy per unit time and the preset number of oscillations exceeds 2 times / s, the centrifuge speed limit is increased by 1 rpm / s for every 1 time / s exceeding the original value, in addition to the increase to 1.1 times the original value. For example, when the difference between the number of oscillations of the differential speed control strategy per unit time and the preset number of oscillations is 4 times / s, the current centrifuge speed limit is 10 rpm / s, and the increased centrifuge speed limit is 10 × 1.1 + 1 × 2 = 13 rpm / s.

[0076] In practice, the system of the present invention adjusts the speed limit of the centrifuge by setting a preset number of oscillations. During the response to sudden changes in concentration, if the control parameters of the differential speed adjustment strategy are not properly matched or the actuator has dynamic constraints, repeated correction behavior is likely to occur during the adjustment process, which manifests as an increase in the number of oscillations of the differential speed output, resulting in instability in the adjustment process and a delay in the effective response. By increasing the speed limit of the centrifuge, the dynamic response constraints of the actuator can be relaxed, the continuity and monotonicity of the differential speed adjustment can be improved, the number of oscillations can be reduced, thereby improving the adjustment stability of the equipment action and further improving the dynamic responsiveness of the centrifugal dehydration process.

[0077] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A remote control system for a centrifuge dewatering unit, characterized in that, include: The data processing module includes an acquisition unit for acquiring material separation data and centrifuge operation data respectively, and a preprocessing unit connected to the acquisition unit for preprocessing the material separation data and the operation data respectively to obtain material centrifugation characteristics and operation characteristics respectively. The centrifugation control module, which is connected to the data processing module, includes a modeling unit for constructing a centrifugation operation coupling relationship model based on the centrifugation characteristics of the material and the operation characteristics; an analysis unit connected to the modeling unit for analyzing the centrifugation process according to the operation data and the centrifugation operation coupling relationship model to obtain a differential speed adjustment strategy; and an execution unit connected to the analysis unit for adjusting the equipment operation of the centrifuge according to the differential speed adjustment strategy. The dehydration response determination module, which is connected to the centrifugation control module, is used to determine whether the dynamic response of the centrifugation dehydration process meets the requirements based on the separation effect deviation rate. A gain adjustment module, which is connected to the data processing module and the dehydration response determination module respectively, is used to determine the normalized gain adaptive adjustment of the operating data of the activated centrifuge based on the response time of the centrifuge load change. A rate limit adjustment module, which is connected to the centrifugation control module and the gain adjustment module respectively, is used to determine the centrifuge rate limit based on the number of oscillations of the differential speed adjustment strategy per unit time.

2. The remote control system for a centrifuge dewatering unit according to claim 1, characterized in that, The dehydration response determination module determines that the dynamic responsiveness of the centrifugal dehydration process meets the requirements when the separation effect deviation rate is less than or equal to a preset deviation rate. The dehydration response determination module determines that the dynamic responsiveness of the centrifugal dehydration process does not meet the requirements when the deviation rate of the separation effect is greater than the preset deviation rate.

3. The remote control system for a centrifuge dewatering unit according to claim 2, characterized in that, If the dynamic responsiveness of the gain adjustment module in response to the centrifugal dehydration process does not meet the requirements, the timely response to the sudden change in material concentration is determined based on the response time of the sudden change in centrifuge load.

4. The remote control system for a centrifuge dewatering unit according to claim 3, characterized in that, The response time of the gain adjustment module to the sudden change in centrifuge load is less than or equal to the preset first response time, and the timeliness of the response to the sudden change in material concentration meets the requirements. The response time of the gain adjustment module to the sudden change in centrifuge load is longer than the preset first response time, and it is determined that the timeliness of the response to the sudden change in material concentration does not meet the requirements.

5. The remote control system for a centrifuge dewatering unit according to claim 4, characterized in that, The gain adjustment module responds to the centrifuge load change for a duration that is greater than the preset first response duration and less than or equal to the preset second response duration, thereby activating the normalized gain adaptive adjustment of the centrifuge's operating data. The gain adjustment module responds to the centrifuge load change for a duration longer than the preset second response duration, initially determining that the adjustment stability of the equipment action does not meet the requirements, and then determines whether the adjustment stability of the equipment action meets the requirements based on the number of oscillations of the differential speed adjustment strategy per unit time.

6. The remote control system for a centrifuge dewatering unit according to claim 5, characterized in that, The normalized gain adaptive adjustment of the activated centrifuge operating data includes: The gain adjustment module is used to process the centrifuge load data in the operating data to obtain the instantaneous load change rate; If the gain adjustment module responds to the instantaneous change rate of the load being less than or equal to a preset instantaneous change rate, it increases the normalized gain of the centrifuge's operating data; If the gain adjustment module responds to the instantaneous change rate of the load being greater than the preset instantaneous change rate, it dynamically adjusts the normalized gain of the centrifuge's operating data.

7. The remote control system for a centrifuge dewatering unit according to claim 6, characterized in that, The increase in the normalized gain of the centrifuge's operating data is determined by the difference between the response time of a sudden change in centrifuge load and a preset first response time.

8. The remote control system for a centrifuge dewatering unit according to claim 7, characterized in that, The rate limiting adjustment module determines whether the adjustment stability of the equipment action meets the requirements based on the number of oscillations of the differential speed adjustment strategy per unit time when the response time to the sudden change in centrifuge load is greater than the preset second response time.

9. The remote control system for a centrifuge dewatering unit according to claim 8, characterized in that, The rate limiting adjustment module responds to the differential adjustment strategy within a unit time by an oscillation number less than or equal to a preset oscillation number, and determines that the adjustment stability of the equipment action meets the requirements. The rate limit adjustment module responds when the number of oscillations of the differential speed adjustment strategy per unit time is greater than the preset number of oscillations, determines that the adjustment stability of the equipment action does not meet the requirements, and increases the rate limit of the centrifuge.

10. The remote control system for a centrifuge dewatering unit according to claim 9, characterized in that, The increase in the centrifuge's rate limit is determined by the difference between the number of oscillations of the differential speed adjustment strategy per unit time and the preset number of oscillations.

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