Combustion chamber nozzle regulation linkage control system

Abstract

The present application belongs to the technical field of industrial automatic linkage control, and relates to a combustion chamber nozzle regulation linkage control system, comprising: a state acquisition module, used for acquiring a controlled regulation unit displacement parameter and a physical interference carrier state parameter; a polarity phase discrimination module, used for real-time calculation of a first-order time derivative of the displacement parameter and determination of a polarity switching identifier; a matrix storage module, used for storing forward and reverse interference sub-matrices with heterogeneous weights; a compensation operation module, used for calling a sub-matrix and determining an asymmetric compensation amount when the polarity switching identifier jumps; a boundary constraint module, used for amplitude limiting processing of a compensation amount change rate; and a linkage control module, used for issuing a synchronous regulation instruction. The present application identifies asymmetric blocking characteristics of a physical response end, eliminates commutation transient compensation mismatch, and suppresses system cross oscillation in a multivariable strong coupling environment.

Description

Technical Field

[0001] This invention belongs to the field of industrial automatic linkage control technology, and in particular relates to a combustion chamber nozzle adjustment linkage control system. Background Technology

[0002] Current multi-media collaborative injection systems typically employ multiple nozzles arranged in parallel as terminal actuators to meet the rapid adjustment of the global load. In essence, such systems are typical multivariable strongly coupled nonlinear control systems. The conventional approach for general control or regulation systems is to configure each nozzle with an independent PID control loop and apply a static decoupling matrix to suppress pressure fluctuations in the common header caused by the action of a single actuator. However, in industrial applications where high dynamic response accuracy is required, the hydrodynamic coupling effect between parallel nozzles imposes a fundamental constraint on linear control methods. When any nozzle adjusts its opening, the pressure field inside the common header undergoes transient distortion, which in turn interferes with the flow stability of the remaining nozzles. To mitigate such interference, the industry typically attempts to increase the control gain or shorten the sampling period, but this approach easily induces mutual coupling oscillations between control loops.

[0003] From a fundamental physical mechanism perspective, the nozzle valve core exhibits significant asymmetric response characteristics during its reciprocating motion. This phenomenon is a common control challenge in industrial automation control caused by the physical dead zone of the actuator and the nonlinearity of friction. The mechanical static friction and fluid resistance faced by the valve core when overcoming fluid back pressure to open are fundamentally different from the dynamic boundary conditions when closing in accordance with back pressure. This physical asymmetric hysteresis characteristic limits the existing control systems in handling multivariable interference. To improve control accuracy, the industry has attempted to compensate for system defects through algorithm optimization, for example, publication number CN1134. Chinese invention patent application 31816A discloses a control method for a symmetrical and unequal negative superimposed proportional valve-controlled asymmetric cylinder system. It eliminates steady-state errors caused by the asymmetry of valve superposition through zero-point online compensation. However, under the operating conditions of multi-node parallel connection of combustion chamber nozzles and strong fluid coupling, the control logic is limited to the steady-state correction of individual actuator components. It lacks the ability to perceive dynamic flow field distortion induced by transient changes in action polarity under multivariable conditions. The existing technology fails to identify the sudden change in physical damping at the moment of actuator reversal. During the frequent opening and closing transient process of the nozzle group, the system is prone to cross oscillation due to the phase misalignment between the decoupling weight and the physical reality.

[0004] Therefore, how to construct a control logic that can identify the motion polarity of the actuator and counteract asymmetric hydrodynamic hindrance in real time, so as to suppress the systemic cross oscillation under the condition of frequent reversal of multiple actuator nodes, has become the technical problem to be solved by this invention. Summary of the Invention

[0005] This invention aims to solve the problem of high-frequency cross oscillations in the system caused by the mismatch between control commands and physical responses due to the asymmetry of physical damping during positive and negative strokes of multiple execution nodes.

[0006] In this technical solution, a combustion chamber nozzle control system includes: The state acquisition module is used to acquire the displacement parameters of multiple controlled adjustment units and the reference state parameters within the shared physical interference carrier. The polarity phase detection module is used to calculate the first-order time derivative of the displacement parameter in real time, and map each controlled adjustment unit to a positive or negative operating characteristic point according to the positive or negative polarity of the first-order time derivative, so as to determine the polarity switching identifier. The matrix storage module is used to store forward and reverse interference sub-matrices with heterogeneous element weights for the same controlled adjustment unit. The forward and reverse interference sub-matrices correspond to the asymmetric coupling characteristics of fluid dynamics in the forward and reverse strokes, respectively. The compensation calculation module is used to make a logical hard switch call between the forward interference submatrix and the reverse interference submatrix when the polarity switching flag jumps, and to issue an asymmetric compensation amount based on the switched submatrix and the real-time state variables. The boundary constraint module is used to limit the rate of change of the asymmetric compensation quantity according to the saturation function and output the constrained compensation signal. The linkage control module is used to receive externally input reference load commands and, based on the reference load commands, reference state parameters, and constrained compensation signals, issue synchronous control commands to drive the coordinated action of each controlled regulating unit.

[0007] Preferably, the polarity phase detection module extracts the nonlinear residual generated by the mechanical dead zone of the controlled adjustment unit, and converts the nonlinear residual into a high-frequency jitter excitation signal and injects it into the input of the compensation calculation module. The controlled oscillation at the logic level is used to offset the static friction resistance of the controlled adjustment unit. The compensation calculation module combines the interference prediction sequence generated by the state observer with the polarity switching identifier to construct a multi-dimensional collaborative dynamic compensation network.

[0008] Preferably, the boundary constraint module is set with a safety threshold for the rate of change of the asymmetric compensation quantity, and triggers the smooth degradation of the control law when the rate of change exceeds the safety threshold, thereby maintaining the bottom-line safety of the control system by forcibly truncating the high-frequency compensation signal component.

[0009] Preferably, the matrix storage module updates the element weights of the forward and reverse interference sub-matrices online according to the mechanical wear state of the controlled adjustment unit to compensate for attribute drift during long-cycle operation.

[0010] Preferably, the status acquisition module includes a pressure sensing unit and a displacement sensing unit; the pressure sensing unit is located at the output end of the shared physical interference carrier and is used to monitor the global parameter distortion signal caused by the action of the controlled adjustment unit, and to use the global parameter distortion signal as the feedback input of the linkage control module.

[0011] Preferably, the compensation calculation module adopts feedforward compensation logic, constructs feedforward gain based on the first-order differential term of the displacement parameter, and adjusts the amplitude and slope of the asymmetric compensation amount in real time through the discrete gain scheduling algorithm within the action polarity range indicated by the polarity switching flag.

[0012] Preferably, the element weight difference between the forward and reverse interference submatrixes within the matrix storage module is determined by the physical resistance torque deviation value of the controlled adjustment unit in the forward and reverse strokes. The physical resistance torque deviation value is used to characterize the mechanical asymmetry of the controlled adjustment unit in different action directions.

[0013] Preferably, the control system also includes a status monitoring module, which is used to analyze the historical action sequence of the controlled adjustment unit and establish a coupled interference baseline in conjunction with the interference prediction sequence, so as to preemptively offset the fluid dynamic fluctuations within the shared physical interference carrier.

[0014] Preferably, when the linkage control module detects a jump in the polarity switching indicator, it synchronously triggers a logical switch of the weights inside the matrix storage module. This topology switch of the data stream offsets the mechanical friction deviation of the controlled adjustment unit, reducing the dynamic tracking error between the reference state parameters and the reference load command.

[0015] Compared with the prior art, the combustion chamber nozzle control system of the present invention has the following advantages: Firstly, in the linkage control of combustion chamber nozzle regulation, by introducing a polarity discrimination mechanism for the direction of the execution displacement in the dynamic decoupling link, the control system has the ability to identify the asymmetry of the physical blockage of the actuator, transforming the complex mechanical response characteristics into discrete logic control parameters. This reflects the efficient digital modeling of the functional components of the control system. This asymmetric matrix dynamic switching logic based on polarity state, in principle, cancels the compensation mismatch caused by the transient interval of node reversal. Since the control quantity can be adjusted synchronously with the change of action direction, it avoids the cross oscillation of the control loop caused by nonlinear mechanical dead zone, ensuring the tight closure of the adjustment command and physical response under complex working conditions.

[0016] Secondly, the disturbance prediction sequence generated by the state observer is combined with the real-time action polarity phase detection results to construct a multi-dimensional collaborative dynamic compensation network. The state observer pre-constructs the coupling disturbance baseline by analyzing the historical action sequence. With the weight mapping of the asymmetric submatrix, the step response time of the system when facing sudden load fluctuations is shortened. This deep coupling of multiple mechanisms not only effectively suppresses the hydrodynamic interference between parallel nozzles, but also improves the steady-state convergence accuracy of the multivariable control system.

[0017] Third, by setting stability boundary saturation constraints outside the core decoupling algorithm, the system exhibits high engineering robustness when facing non-ideal operating conditions such as sensor aging or feedback signal drift. When the rate of change of the compensation signal exceeds the safety threshold, the saturation function triggers the smooth degradation of the control law. By forcibly truncating the high-frequency compensation quantity, the system maintains the bottom-line safety of operation. This protection logic works in conjunction with the adaptive weight correction mechanism, enabling the control system to update the interference matrix weights online according to the mechanical wear state during long-term operation, thereby extending the effective maintenance cycle of the system. Attached Figure Description

[0018] Figure 1 This invention relates to an overall architecture diagram of the combustion chamber nozzle control and linkage system; Figure 2 This invention relates to a flowchart of the controlled adjustment unit polarity phase detection and asymmetric compensation control. Detailed Implementation

[0019] The technical solutions in the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] It should be noted that all directional and positional terms used in this invention, such as: up, down, left, right, front, back, vertical, horizontal, inner, outer, top, bottom, transverse, longitudinal, center, etc., are only used to explain the relative positional relationship and connection between components in a specific state (as shown in the accompanying drawings). They are only for the convenience of describing this invention and do not require that this invention be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. In addition, the descriptions of "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms installation, connection, and linking should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0022] In the description of this specification, references to the terms "an embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] Example 1: This example relates to a combustion chamber nozzle control and linkage system, including: The state acquisition module is used to acquire the displacement parameters of multiple controlled adjustment units and the reference state parameters within the shared physical interference carrier. The polarity phase detection module is used to calculate the first-order time derivative of the displacement parameter in real time, and map each controlled adjustment unit to a positive or negative operating characteristic point according to the positive or negative polarity of the first-order time derivative, so as to determine the polarity switching identifier. The matrix storage module is used to store forward and reverse interference sub-matrices with heterogeneous element weights for the same controlled adjustment unit. The forward and reverse interference sub-matrices correspond to the asymmetric coupling characteristics of fluid dynamics in the forward and reverse strokes, respectively. The compensation calculation module is used to make a logical hard switch call between the forward interference submatrix and the reverse interference submatrix when the polarity switching flag jumps, and to issue an asymmetric compensation amount based on the switched submatrix and the real-time state variables. The boundary constraint module is used to limit the rate of change of the asymmetric compensation quantity according to the saturation function and output the constrained compensation signal. The linkage control module is used to receive externally input reference load commands and, based on the reference load commands, reference state parameters, and constrained compensation signals, issue synchronous control commands to drive the coordinated action of each controlled regulating unit.

[0024] The polarity phase detection module described in this embodiment extracts the nonlinear residual generated by the mechanical dead zone of the controlled adjustment unit, and converts the nonlinear residual into a high-frequency jitter excitation signal before injecting it into the input of the compensation calculation module. The controlled oscillation at the logic level is used to offset the static friction resistance of the controlled adjustment unit. The compensation calculation module combines the interference prediction sequence generated by the state observer with the polarity switching identifier to construct a multi-dimensional collaborative dynamic compensation network.

[0025] The boundary constraint module described in this embodiment is equipped with a safety threshold for the rate of change of the asymmetric compensation quantity. When the rate of change exceeds the safety threshold, the smooth degradation of the control law is triggered. The system maintains the bottom-line safety of operation by forcibly truncating the high-frequency compensation signal component.

[0026] The matrix storage module described in this embodiment updates the element weights of the forward and reverse interference sub-matrices online according to the mechanical wear state of the controlled adjustment unit, in order to compensate for attribute drift during long-cycle operation.

[0027] The state acquisition module described in this embodiment includes a pressure sensing unit and a displacement sensing unit; the pressure sensing unit is located at the output end of the shared physical interference carrier and is used to monitor the global parameter distortion signal caused by the action of the controlled adjustment unit, and uses the global parameter distortion signal as the feedback input of the linkage control module.

[0028] The compensation calculation module described in this embodiment adopts feedforward compensation logic, constructs feedforward gain based on the first-order differential term of displacement parameter, and adjusts the amplitude and slope of asymmetric compensation in real time through discrete gain scheduling algorithm within the action polarity range indicated by polarity switching flag.

[0029] The element weight difference between the forward and reverse interference submatrixes inside the matrix storage module described in this embodiment is determined by the physical resistance torque deviation value of the controlled adjustment unit in the forward and reverse strokes. The physical resistance torque deviation value is used to characterize the mechanical asymmetry of the controlled adjustment unit in different action directions.

[0030] The control system described in this embodiment also includes a status monitoring module, which is used to analyze the historical action sequence of the controlled adjustment unit and establish a coupled interference baseline in conjunction with the interference prediction sequence, so as to preemptively offset the fluid dynamic fluctuations within the shared physical interference carrier.

[0031] When the linkage control module described in this embodiment detects a jump in the polarity switching indicator, it synchronously triggers a logical switch of the weights inside the matrix storage module. This topology switch of the data stream offsets the mechanical friction deviation of the controlled adjustment unit, reducing the dynamic tracking error between the reference state parameters and the reference load command.

[0032] Example 2: In this example, in an environment with a shared fluid header and multiple controlled regulating units distributed in parallel, the actuators face different resistance characteristics when overcoming fluid back pressure to open and when adapting to back pressure to close. A single nozzle displacement jump induces asymmetric distortion of the pressure field within the common header, causing signal oscillations in other nozzles operating in parallel. Traditional control methods using static decoupling matrices output compensation signals with phase deviations during the actuator's commutation transient interval, leading to high-frequency cross oscillations in the fluid regulating loop. The system provided by this invention operates as follows: the state acquisition module collects reference state parameters within the common header. and the real-time displacement parameter sequence of each controlled adjustment unit The polarity phase detection module calculates the first-order time derivative of the displacement parameter of each controlled adjustment unit. Based on the polarity of the first-order time derivative, the corresponding controlled adjustment unit is mapped to a positive or negative operating feature point, determining the polarity switching identifier. The dynamic decoupling operation unit detects this polarity switching identifier and switches between calling the positive or negative interferometric submatrix in the matrix storage module. The interference feature weights in the positive interferometric submatrix... The values ​​of the corresponding elements in the inverse interference submatrix are not equal to those in the inverse interference submatrix, so as to quantitatively characterize the directional resistance deviation of the fluid actuator during the opening and closing strokes.

[0033] The compensation calculation module is based on the displacement change rate. Interference feature weights with the call Determine the asymmetric compensation amount and the feedforward compensation signal. The calculation satisfies the following formula: ,in, For feedforward compensation signal, For feedforward gain, For the target reference physical quantity, These are the actual collected baseline state parameters. For the first The node is the first The coupling interference coefficients of each node, For the first The rate of change of displacement of each controlled adjustment unit.

[0034] The boundary constraint module applies the saturation function to the feedforward compensation signal. The rate of change is limited, and a constrained compensation signal is output. The linkage control module receives the reference load command and aggregates the reference state parameters and the constrained compensation signal. It then issues synchronous control commands to each controlled regulation unit. During this aggregation process, a first-order linear extended state observer network running in the background is deployed simultaneously to support feedforward compensation. The observer uses the synchronous control command of the previous cycle as the forward extrapolation variable and the actual collected reference state parameters as the backward observation error correction term. It solves the extended state space equations simultaneously in each control cycle. The computing module integrates the nonlinear fluid interference distortion and the unmodeled exogenous load disturbance in the system into a lumped disturbance term. It uses the output deviation multiplied by the calibrated observation gain to perform real-time numerical approximation. The approximated state quantity is then transformed into a disturbance prediction sequence with phase lead characteristics through discrete difference extrapolation. This scheme uses a polarity determination mechanism to offset the asymmetric hindrance of the physical dimension, eliminates the interference propagation caused by nonlinear fluid damping and control matrix mismatch, and enables the system to maintain convergent stability under the condition of frequent commutation of parallel nozzles, thus shortening the step response time.

[0035] Example 3: This example combines Figures 1 to 2 The following describes a combustion chamber nozzle control and linkage system: Figure 1 As shown, a combustion chamber nozzle control linkage control system includes multiple functional modules and data transmission paths. The displacement parameters of the controlled adjustment unit and the reference state parameters of the shared physical interference carrier are input to a state acquisition module. This module acquires the displacement parameters of the controlled unit and the reference state parameters, and outputs the acquired displacement parameters to a polarity phase detection module. Simultaneously, the reference state parameters are transmitted to the linkage control module via a dotted path. After receiving the displacement parameters, the polarity phase detection module calculates the polarity of the first-order time derivative and determines the polarity switching identifier, which is then transmitted to the compensation calculation module. A matrix storage module stores asymmetric forward and reverse interference. The submatrix is ​​provided to the compensation calculation module, which then hard-switches the submatrix based on the input polarity switching identifier logic to issue the asymmetric compensation amount. This asymmetric compensation amount is then output to the boundary constraint module. The boundary constraint module limits the amplitude based on the rate of change of the saturation function and outputs the constrained compensation signal to the linkage control module. The linkage control module receives the externally input reference load command and performs aggregation processing internally. The aggregation processing includes the reference load command, reference state parameters, and constrained compensation signal, thereby generating a synchronization control command. Finally, the synchronization control command is output to drive the controlled regulation unit to coordinate its actions.

[0036] like Figure 2As shown, the specific polarity phase detection and asymmetric compensation control process, in the real-time evaluation stage of nozzle movement trend, the system first determines whether the absolute value of the first-order time derivative of the displacement parameter exceeds the zero-drift suppression threshold. If the result is negative, the zero-drift suppression strategy is executed and the current polarity identifier is maintained. If the result is positive, the system proceeds to the next level to determine whether the algebraic value of the first-order time derivative has changed from positive to negative. When the movement direction indicator is the open stroke, the system maps it to a positive running feature point and triggers the positive interference submatrix call. When the movement direction indicator is the closed stroke, ... The system maps it to a reverse running feature point and triggers the inverse interference submatrix call. After the corresponding interference submatrix call is completed, the process converges to the node that judges whether the rate of change of the asymmetric compensation quantity exceeds the safety threshold. If the judgment result is yes, the control law smoothing degradation is triggered and the high-frequency compensation signal is forcibly cut off. Then, the synchronous control command is issued through the auxiliary path indicated by the dotted line to achieve asymmetric jamming hedging. If the judgment result is no, that is, in the normal amplitude limiting state, the synchronous control command is directly issued along the main path to achieve asymmetric jamming hedging.

[0037] Example 4: In this example, a high-pressure fuel dynamic test platform simulating a multivariable coupled environment is used. The platform includes a shared fuel header and four controlled adjustment units distributed in parallel. The state acquisition module uses a pressure sensor with a sampling frequency of 10kHz to acquire the reference state parameters within the shared fuel header. And use displacement sensors to obtain the displacement parameters of each controlled adjustment unit. To simulate the actual industrial environment, Gaussian white noise with a signal-to-noise ratio of 25dB and power frequency interference harmonics with a frequency of 50Hz are superimposed in the acquisition circuit.

[0038] Set sampling period At that time, based on the trade-off between the operating frequency of the controlled adjustment unit and the processing cycle of the processor, when the maximum operating frequency of the controlled adjustment unit is 200Hz, in order to meet the signal reconstruction accuracy and reduce the bus load, the sampling cycle is reduced. The sampling frequency is set to 1ms, at which the polarity phase detector module calculates the displacement parameters. First time derivative By identifying the first time derivative The sign change is used to determine the polarity switching indicator of the controlled adjustment unit. When the polarity switching indicator changes in the sample of this invention, the compensation calculation module will call the interference feature weight. The value was switched from 0.85 to 1.12 to match the asymmetric coupling characteristics of fluid dynamics during the shutdown process. Compared with the control group using a static unique matrix, which generated a pressure pulsation with an amplitude of 0.45 MPa accompanied by 80 ms high-frequency oscillation during the commutation transient, the pressure pulsation amplitude of the sample group in this invention was 0.08 MPa. Furthermore, due to the boundary constraint module limiting the rate of change of the asymmetric compensation, the baseline state parameters... The waveform recovered to the steady-state accuracy range within 15.6ms.

[0039] Verify global reference feedforward gain When the numerical range is within the range of 0.5 to 2.0, the observation points are selected. The data shows that within this range, the rise time of the system's step response decreases with the increase of gain. When the gain increases to the out-of-range control point of 2.5, the trigger frequency of the saturation function increases from 5 times per second to 42 times per second. Due to the frequent entry of the constrained compensation signal into the saturation region, the pressure of the shared fuel header generates divergent jitter with an amplitude of 0.32 MPa, proving that the parameter range is a stable range that takes into account both the adjustment speed and the physical boundary constraints. The system uses the polarity switching identifier determined by the polarity phase detection module to guide the matrix switching process, thereby achieving the offset compensation for the asymmetric coupling characteristics of fluid dynamics in the forward and reverse strokes of the controlled adjustment unit. This weighted scheduling mode driven by logical polarity corrects the resistance deviation of the controlled adjustment unit in different stroke directions and improves the cooperative stability of the parallel system under load switching conditions.

[0040] Example 5: In this example, under a control environment where displacement response lag occurs due to static friction torque in the controlled adjustment unit and mechanical transmission backlash, the system receives displacement parameters in time-series form through a state acquisition module. The polarity phase detection module uses the finite difference method to process the acquired displacement data stream. Specifically, it determines the first-order backward difference based on the displacement value at the current sampling moment and the historical value from the previous sampling period, and calculates the first-order time derivative that reflects the real-time action trend of the controlled adjustment unit. To suppress logical misjudgments caused by the noise floor of the displacement sensor, the polarity phase detection module presets a zero-drift suppression threshold. When the first time derivative The absolute value exceeds the zero drift suppression threshold. Furthermore, when its algebraic value jumps from a positive value to a negative value, the system determines that the physical nozzle has entered the closing stroke from the opening stroke and generates a polarity switching flag to guide the subsequent matrix scheduling process.

[0041] For interferometric feature weights The determination method employs a calibration procedure based on step response identification, maintaining all controlled adjustment units except the target unit in a zero-position silent state, and only adjusting the first unit... Each controlled adjustment unit applies a step displacement command with a preset step size, simultaneously acquiring the pressure transient waveform within the shared physical interference carrier using a pressure sensor with a sampling frequency of 10kHz. By extracting features from the rise time and peak overshoot of the pressure waveform in both the opening and closing directions, the resistance deviation coefficient in the asymmetric stroke is calculated and stored in the matrix storage module to establish the weights of each element in the forward and reverse interference sub-matrices. During the aforementioned feature transformation calculation, the system's internal matrix processor extracts the pressure rise time value corresponding to the closing stroke as a numerator parameter, and uses the rise time value corresponding to the opening stroke as a numerator parameter. As the denominator parameter, the division of the two establishes the time asymmetry ratio. The processor performs a linear product mapping of this asymmetry ratio and the natural logarithm of the waveform peak overshoot to generate a dimensionless and unique drag deviation coefficient. Finally, the weight allocation program uses the factory-calibrated mean of the equivalent damping matrix as the reference base, and positively superimposes or negatively subtracts the drag deviation coefficient on the corresponding element values ​​according to the current working stroke, thereby differentiating and deriving the positive and negative interference sub-matrices that present asymmetric assignment results. This procedure converts the physical damping characteristics into a schedulable gain matrix within the control domain, thereby providing operator support for the compensation calculation module to issue asymmetric compensation quantities.

[0042] Based on Coulomb's friction theory and the fluid continuity equation, mechanical wear of the physical valve core causes a change in the static friction boundary, resulting in a long-term, slowly varying drift in the system's flow resistance coefficient. The matrix storage module's built-in element weight online calibration procedure corrects this attribute drift. When the externally input reference load command remains constant and the duration of the constant state exceeds the steady-state evaluation time window, the state acquisition module records the absolute value of the static pressure deviation between the target reference physical quantity within the shared physical interference carrier and the actually acquired reference state parameters. When the absolute value of the static pressure deviation continuously exceeds the wear identification pressure threshold, the matrix storage module extracts historical data within the current polarity range and calculates the proportional attenuation coefficient. Specifically, the proportional attenuation coefficient is obtained by dividing the time integral value of the actual displacement parameter by the time integral value of the feedforward compensation signal. The steady-state evaluation time window... The physical hysteresis constant characterizes the fluid network as it transitions from transient to dynamic equilibrium. The wear identification pressure threshold calibrates the maximum allowable steady-state error boundary of the system. The proportional decay coefficient belongs to the dimensionless positive real number domain. The matrix storage module multiplies the called interference feature weights by the proportional decay coefficient and outputs updated weights that cover the corresponding values ​​in the original physical storage address. For alternative implementation scenarios where edge computing nodes have limited computing power, the matrix storage module bypasses the integral value comparison step. Based on the algebraic sign of the difference between the target reference physical quantity and the actual collected reference state parameters, it accumulates or subtracts a fixed compensation step size to generate updated weights on the basis of the original interference feature weights. The calibration procedure transforms the unmeasurable mechanical wear quantity into a definite gain baseline correction multiplier, maintaining the static tracking closed-loop accuracy of the multivariable strongly coupled system during long-term operation.

[0043] To eliminate the dead zone caused by the nonlinear characteristics within the controlled control unit, the polarity phase detector module employs a high-pass filter with a cutoff frequency set to five times the system's main response bandwidth, based on displacement parameters. High-frequency components are extracted from the data. These high-frequency components are defined as nonlinear residuals containing the characteristics of mechanical clearance and static friction jumps. In this mechanism, static friction is not extracted as a static, stagnant DC component, but rather characterized by capturing the dynamic characteristics of the instantaneous change in friction state. At the instant the controlled adjustment unit crosses the mechanical dead zone or undergoes the transition from static friction to sliding friction, the physical valve core inevitably generates stick-slip motion at the surface level. This stick-slip impact excites a broadband transient acceleration distortion on the continuous displacement feedback signal. The actual physical function of the high-pass filter is to filter out the overall smooth operating baseline and accurately intercept the high-frequency step disturbance excited by the sudden collapse of static friction. This allows the distortion energy at the moment of the sudden change to be separated as a characteristic residual characterizing the system's frictional resistance strength. The compensation calculation module receives the nonlinear residual and converts it into a high-frequency jitter excitation signal by combining it with a pulse sequence of a preset frequency. The amplitude of the signal is constrained by the action of the controlled adjustment unit. Within 3% of the threshold, the signal is injected as a superimposed component into the synchronous control command issued by the linkage control module. During the conversion of the nonlinear residual into a high-frequency jitter excitation signal, the compensation calculation module is internally configured with pulse width modulation logic. The system extracts the transient absolute value of the nonlinear residual and inputs it as a scaling factor into a multiplier. This multiplication is performed in real-time with a pre-stored high-frequency square wave pulse sequence with a constant amplitude and a 50% duty cycle. Through this multiplication modulation, the amplitude fluctuation of the residual is dynamically mapped to the change in the envelope of the pulse sequence, thereby generating an excitation source with both residual envelope characteristics and high-frequency carrier characteristics at the logical level. This source is then output to the subsequent control loop. A physical mechanism of high-frequency jitter disrupting the static friction state of the contact surface is employed, allowing the controlled adjustment unit to overcome the friction dead zone when receiving small-amplitude control commands. Combined with the polarity-driven asymmetric matrix switching method, the baseline state parameters of the shared physical interference carrier under variable load conditions are maintained. Stablize.

[0044] Example 6: In this example, during the process of determining the operating parameters of the controlled regulating unit before it is put into production, the system completes the data recording process through a pressure source and a displacement feedback device. Under the condition that the fuel supply pressure is maintained at 4MPa and the medium temperature is maintained at 60℃, the controlled regulating unit generates lifting and lowering cycles in steps of 5% displacement throughout the entire stroke range, and simultaneously obtains the pressure change gradient under different stroke directions through sensors. Based on the pressure change gradient The interference characteristic weights of each node are calculated based on its corresponding displacement interval. The determined numerical sequence is then entered into the matrix storage module as an offline lookup table called by the compensation operation module.

[0045] When the controlled regulating units exhibit inconsistent operating characteristics due to manufacturing deviations, the linkage control module triggers the field parameter calibration process during the system's initial power-on phase. The linkage control module sequentially sends triangular wave signals with an amplitude of 10% of the rated displacement to each controlled regulating unit, and uses the polarity phase detector module to obtain the displacement parameters. Midnight With reference state parameters peak time According to displacement parameters With reference state parameters The timing relationship calculation reflects the characteristic deviation term of physical time delay. And based on this characteristic deviation term The trigger logic point of the polarity switching indicator has been corrected to align the matrix switching action with the physical transients of the controlled adjustment unit being turned on or off on the time axis.

[0046] Example 7: In this example, in the scenario where the stability boundary is determined before the controlled regulation unit is put into operation, the system uses the boundary constraint module to determine the amplitude limit threshold of the saturation function by quantifying the energy dissipation rate, and the state acquisition module collects the residual signals under different load commands. The polarity phase detection module establishes an energy functional mapping based on the first and second time derivatives of the residual signal, and determines the Lyapunov function value that makes the state trajectory converge to the equilibrium domain. The linkage control module adds a feedforward compensation signal. The disturbance amplitude is controlled until the system enters a critical oscillation state. The maximum pressure fluctuation slope at this point is recorded and defined as the slope limit reference of the saturation function. ,in, For residual signals, For the target reference physical quantity, These are the actual collected baseline state parameters. The value of the Lyapunov function. For feedforward compensation signal, It serves as the slope limit reference.

[0047] When the system is in a condition where ambient temperature fluctuations cause mechanical transmission backlash to drift, the compensation calculation module determines the injection frequency of the high-frequency jitter excitation signal through a frequency sweep procedure. The linkage control module sends a sinusoidal perturbation sequence with a frequency range of 5 to 10 times the system control bandwidth to the controlled adjustment unit, and the displacement parameter is monitored by the status acquisition module. The tracking characteristics of the perturbation sequence are analyzed, and the phase difference between the output displacement and the input perturbation is calculated. The frequency point where the phase difference changes abruptly and the displacement response amplitude reaches 30% of its maximum value is selected as the jitter carrier frequency. This ensures that the high-frequency flutter energy is concentrated in the frequency domain range that disrupts the static friction torque, allowing the controlled adjustment unit's operating characteristics to recover to a quasi-linear response state within a small command range. For the first Displacement parameters of each controlled adjustment unit This refers to the jittered carrier frequency.

[0048] In a clustered controlled regulation environment containing multiple parallel physical nozzles, the linkage control module achieves coordinated action by establishing a mapping relationship between command vectors and actuator physical addresses. Specifically, after receiving a reference load command and aggregating constrained compensation signals, the module initiates a concurrent task with a globally synchronized clock in its internal processing unit. The aggregated command messages are then distributed in parallel according to a preset physical node sequence, ensuring that the synchronous control commands sent to each controlled regulation unit reach the corresponding control interface synchronously within a sub-millisecond time window. This effectively mitigates the superposition effect of asymmetric pressure field disturbances induced by command time differences at the signal level. To anchor the boundary constraint module to the physical action limits, the system continuously monitors the pressure response peak value of the shared fluid header at the controlled regulation unit's limit commutation rate using pressure sensors during the initialization calibration process. A monotonic mapping relationship is established between this peak value and the action voltage increment of the controlled regulation unit, thereby determining the Lyapunov function value. The voltage threshold sequence is discretized and stored in the boundary constraint module, and the calculated feedforward compensation signal is then processed. When the corresponding driving component reaches the boundary of the voltage threshold sequence, the saturation function limiter forcibly performs a cutoff operation to maintain the amplitude of the synchronous control command within the safe current range that will not cause physical damage to the controlled regulation unit.

[0049] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit of this application and the scope of protection of this invention, and all of these forms are within the protection scope of this application.

Claims

1. A combustion chamber nozzle control and linkage system, characterized in that, include: The state acquisition module is used to acquire the displacement parameters of multiple controlled adjustment units and the reference state parameters within the shared physical interference carrier. The polarity phase detection module is used to calculate the first-order time derivative of the displacement parameter in real time, and map each controlled adjustment unit to a positive or negative operating characteristic point according to the positive or negative polarity of the first-order time derivative, so as to determine the polarity switching identifier. The matrix storage module is used to store forward and reverse interference sub-matrices with heterogeneous element weights for the same controlled adjustment unit. The forward and reverse interference sub-matrices correspond to the asymmetric coupling characteristics of fluid dynamics in the forward and reverse strokes, respectively. The compensation calculation module is used to make a logical hard switch call between the forward interference submatrix and the reverse interference submatrix when the polarity switching flag jumps, and to issue an asymmetric compensation amount based on the switched submatrix and the real-time state variables. The boundary constraint module is used to limit the rate of change of the asymmetric compensation quantity according to the saturation function and output the constrained compensation signal. The linkage control module is used to receive externally input reference load commands and, based on the reference load commands, reference state parameters, and constrained compensation signals, issue synchronous control commands to drive the coordinated action of each controlled regulating unit.

2. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The polarity phase detection module extracts the nonlinear residual generated by the mechanical dead zone of the controlled regulating unit, and converts the nonlinear residual into a high-frequency jitter excitation signal before injecting it into the input of the compensation calculation module. The controlled oscillation at the logic level is used to offset the static friction resistance of the controlled regulating unit. The compensation calculation module combines the interference prediction sequence generated by the state observer with the polarity switching identifier to construct a multi-dimensional collaborative dynamic compensation network.

3. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The boundary constraint module sets a safety threshold for the rate of change of the asymmetric compensation quantity, and triggers the smooth degradation of the control law when the rate of change exceeds the safety threshold. It maintains the bottom-line safety of the control system by forcibly truncating the high-frequency compensation signal component.

4. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The matrix storage module updates the element weights of the forward and reverse interference sub-matrices online based on the mechanical wear state of the controlled adjustment unit to compensate for attribute drift during long-cycle operation.

5. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The status acquisition module includes a pressure sensing unit and a displacement sensing unit. The pressure sensing unit is located at the output end of the shared physical interference carrier and is used to monitor the global parameter distortion signal caused by the action of the controlled adjustment unit, and to use the global parameter distortion signal as the feedback input of the linkage control module.

6. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The compensation calculation module adopts feedforward compensation logic, constructs feedforward gain based on the first-order differential term of displacement parameter, and adjusts the amplitude and slope of asymmetric compensation in real time through discrete gain scheduling algorithm within the action polarity range indicated by polarity switching flag.

7. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The difference in element weights between the forward and reverse interference submatrices within the matrix storage module is determined by the deviation of the physical resistance torque of the controlled adjustment unit in the forward and reverse strokes. The deviation of the physical resistance torque is used to characterize the mechanical asymmetry of the controlled adjustment unit in different directions of motion.

8. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, The control system also includes a status monitoring module, which analyzes the historical action sequence of the controlled adjustment unit and establishes a coupled interference baseline in conjunction with the interference prediction sequence, so as to preemptively offset the fluid dynamic fluctuations within the shared physical interference carrier.

9. The combustion chamber nozzle control and linkage system according to claim 1, characterized in that, When the linkage control module detects a jump in the polarity switching indicator, it synchronously triggers a logical switch of the weights inside the matrix storage module. This topology switch of the data stream offsets the mechanical friction deviation of the controlled adjustment unit, reducing the dynamic tracking error between the reference state parameters and the reference load command.

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