10 results about "Design control" patented technology

This invention discloses an adaptive robust brake-by-wire method and system, relating to the field of vehicle brake-by-wire technology. The method comprises the following steps: S1, establishing a multi-coupled dynamic mathematical model of the brake-by-wire system and determining the system state variables and control inputs; S2, online observation and approximation of the system's hydraulic coupling disturbances, mechanical friction disturbances, and external road surface disturbances; S3, designing a hierarchical adaptive robust control based on backstepping sliding mode control technology and combined with observations from a multi-disturbance observer; S4, adjusting the gain coefficient of the sliding mode control online; S5, verifying the asymptotic stability of the entire control system; and S6, converting the designed control law into an electrical signal and inputting it to the actuator of the brake-by-wire system. This invention achieves precise, rapid, and stable control of braking pressure under complex operating conditions, improving the robustness and adaptability of the brake-by-wire system.

This invention discloses an autonomous and controllable kernel-shared collaborative design method, relating to the field of collaborative design control technology. The method includes reading nodes and task packages, constructing effective collaborative edges and calculating a consistency weight matrix, extracting the number of tasks to define a design state vector, completing a first-order state update through deviation identification and quantization step size control, calculating propagation weights and received aggregation quantities based on activation markers, updating shared change tracking quantities, identifying continuously deviating nodes, correcting the state vector through second-order coordination, constructing a quality prediction quantity and performing intervention, and using the corrected state and tracking quantity as the initial values ​​for the next cycle to form a complete iterative closed loop. This invention achieves stable convergence and efficient propagation of the decentralized collaborative design state by constructing an effective collaborative edge set and combining directional quantization synchronization and a shared change tracking mechanism.

This invention relates to the field of standard reference material development and evaluation technology, and discloses a method for controlling and evaluating the homogeneity of standard reference materials used in interlaboratory precision assessment. This method effectively guides the design, control, and evaluation of the homogeneity uncertainty of standard reference materials used in interlaboratory precision assessment, promotes the quality improvement and upgrading of standard reference material development, and provides a scientific basis for users to select suitable standard reference materials for interlaboratory precision assessment. This invention uses the inherent precision of the measurement method as a quantitative basis to construct a complete technical system of "forward design control at the development end - reverse application evaluation at the user end." By distinguishing between the actual use scenarios of a single minimum packaging unit and multiple minimum packaging units, it establishes a quantitative constraint relationship between the homogeneity uncertainty of the standard reference material and the uncertainty of the measurement method, upgrading the homogeneity development of standard reference materials from empirical judgment to quantitative science, while providing users with a quantitative basis for selection and evaluation.

The embodiment of the application provides a resource perception-based self-triggered hierarchical pinning pulse synchronization control method and system, and relates to the technical field of automation control. The method first establishes a complex dynamic network model of a target system, and generates hierarchical network structures of a leader layer and an interactive following layer based on an invariable pinning mechanism. Then, control inputs are designed according to the complex dynamic network model and the hierarchical network structures, and then the pinning pulse synchronization control is performed on the target system according to the control inputs. For the leader layer, self-triggered driven pulse pinning control is designed, a constrained node set containing multiple nodes is determined in advance, the proportion of effective control nodes is improved, the required pulse frequency is reduced while the synchronization performance is ensured; for the interactive following layer, self-triggered control is designed, the controlled nodes determine the control application time according to the local state, global error information and centralized scheduling are not required, and the occupation amount of communication and calculation resources is reduced.

A Rijke tube thermoacoustic instability system active control method based on data-driven review cost self-adaption, comprising: based on the Rijke tube thermoacoustic instability model, assuming the form of the thermoacoustic instability system; using recursive least squares online identification to capture the dynamic characteristics of the thermoacoustic system in real time; the captured Rijke tube thermoacoustic instability dynamic characteristics are used to design an adaptive controller to update the adaptive control coefficient; according to the obtained control coefficient, a controller is designed and the Rijke tube acoustic signal is controlled. The control algorithm of the present application carries out feedback control through data, has simple structure, fast calculation speed, does not need to pre-train model, realizes identification control integration. Due to the introduction of online identification, it has strong robustness to data and parameter uncertainty. The method can improve the control precision and flexibility, enhance the response speed and adaptability of the system, so as to realize the efficient control of the thermoacoustic instability phenomenon.

This application provides a method and apparatus for designing control laws for a thermally managed combined power unit, belonging to the field of aerospace electromechanical systems. The method includes: establishing mathematical models for the core components of the thermally managed combined power unit; constructing an initial steady-state simulation model by combining flow rate, pressure, and energy conservation relationships; revising the initial steady-state simulation model to obtain a faithful steady-state simulation model; building a transient simulation model based on the faithful steady-state simulation model, incorporating mode switching logic, fuel supply strategy, control target selection rules, and system safety boundaries, and designing a basic control law; employing a particle swarm optimization algorithm, using the fuel control PID parameters of the transient simulation model as the optimization object, and using mode switching time, system overshoot, and power turbine exhaust temperature as optimization indicators to optimize the control parameters of the transient simulation model; updating the optimized parameters to the transient simulation model to obtain a transient simulation model of the thermally managed combined power unit.

The application discloses a belt conveyor roller parameterized design control system, which comprises a parameterized window input module, a two-dimensional drawing generation module, a three-dimensional model generation module, a finite element simulation checking module and an outsourced part standard part database module. The system can realize the functions of belt conveyor roller design calculation, strength checking, two-dimensional / three-dimensional parameterized modeling, finite element analysis, three-dimensional drawing and finite element analysis result output, and has great significance in realizing the storage, processing, management and sharing of engineering data of the structure, accelerating the design speed, shortening the product production cycle, reducing the design and production cost, improving the product reliability and dynamic simulation simulation.

The application discloses a centering tracking control method and device based on FTESO and PNTSMC; the method comprises the following steps: a dynamic model of a centering platform is established, vertical displacement, pitch angle and roll angle of the centering platform are taken as generalized coordinates, and external disturbance and unmodeled dynamics are modeled as lumped disturbance; based on a finite time extended state observer, velocity states of the generalized coordinates and the lumped disturbance are estimated in real time; based on a pre-defined time nonsingular terminal sliding mode control strategy, a control law is designed; the control law controls driving force of a hydraulic cylinder based on disturbance estimation value provided by the finite time extended state observer, so that the centering platform can track an expected trajectory within a preset time. The application can realize fast, accurate and robust tracking of a pose of the centering platform, and allows a user to preset a convergence time, thereby significantly improving performance and reliability of an automatic centering process.

The application belongs to the technical field of robot control, and particularly relates to a robot trajectory control method fusing delay performance and finite time command filter, comprising: establishing a dynamic model of the robot; introducing a preset performance boundary with a delay function to constrain a position tracking error; in the control law design, combining a backstepping method with a second-order finite time command filter to obtain a virtual control signal and a derivative thereof; processing the filter error by constructing a dynamic compensation signal at a position layer, and directly feeding forward the derivative signal of the filter when designing a control torque at a speed layer, so that the differential error at the speed layer is eliminated; meanwhile, an external time-varying disturbance is estimated on line by using a RBF neural network; and finally, the actual finite time stability of a closed loop system is proved based on Lyapunov theory. The application can realize high-precision trajectory tracking of the robot, and effectively overcome the influence of command filter compensation coupling and external disturbance on the system.

The application discloses a kind of desulfurization oxidation wind automatic control method and system, comprising the following steps: the original flue gas flow is divided into multiple load intervals, the SO2 concentration of absorption tower entrance is divided into multiple sulfur fraction intervals, with original flue gas flow and entrance SO2 concentration as control variable, the reasonable demand range of oxidation air volume is determined by theoretical calculation and operation data, and the corresponding ladder corresponding relationship table is generated;Real-time acquisition of the original flue gas flow and absorption tower entrance SO2 concentration of desulfurization system;According to the current acquisition parameter matching to corresponding ladder interval.The application, maximization uses existing coal-fired power plant desulfurization system condition, in not additional increase system or equipment case, by design control logic, realize the automatic control of variable frequency desulfurization oxidation wind, simultaneously by establishing unit load and flue gas sulfur fraction joint control model, realize the ladder type automatic regulation of oxidation fan air volume, to reach the purpose of energy saving, stable operation.