3 results about "Saturation nonlinearity" patented technology

This invention discloses a design method and system for an event-triggered controller based on a Markov model, belonging to the field of controller design technology. The method includes the following steps: establishing a hidden Markov model, including system state, control input, output, external disturbances, and time-varying state delay; designing event triggering conditions based on the hidden Markov model to dynamically trigger state information transmission; designing an asynchronous controller to generate control input based on the state information transmitted under the asynchronous event triggering conditions and handling actuator saturation nonlinearity; and analyzing the stochastic stability and H0 of the closed-loop system using Lyapunov functions and linear matrix inequalities. ∞ Performance; a matrix augmentation method is used to separate the product of the controller gain matrix and the Lyapunov variables, obtaining a result that simultaneously ensures the stochastic stability of the system and satisfies H ∞ The performance metrics are consistent with the gain matrix of all asynchronous and event-triggered controllers. The event-triggered controller designed in this invention can guarantee H... ∞ While ensuring anti-interference capabilities, the number of communication triggers is minimized to achieve on-demand control.

The application discloses a kind of electromagnetic pump flow control methods based on double duty ratio and current feedback compensation, it is related to flow control field, the electromagnetic pump flow control method based on double duty ratio and current feedback compensation includes: step S1, generates double duty ratio pulse width modulation signal, wherein first level PWM signal defines electromagnetic pump's macroscopic on-off timing to adjust the number of times of work per unit time, the beneficial effects of the present application are: the present application generates double duty ratio PWM signal, to first level coarse adjustment unit time work frequency and according to interval distribution on half wave, inhibit the low-frequency flow pulsation of traditional zero-crossing power regulation;By real-time acquisition coil current and closed-loop correction second level PWM duty cycle, effectively compensate the flow drift caused by coil temperature rise and voltage fluctuation;By querying nonlinear correction lookup table to obtain the optimized combination of first and second duty cycles, overcome the low-duty-cycle driving dead zone and high-duty-cycle magnetic circuit saturation nonlinearity.

This specification discloses a method and apparatus for vehicle control. Based on the acquired vehicle structural parameters, vehicle motion parameters, lateral and longitudinal control saturation functions, and a standard robust controller model, the state-space equations of the vehicle's closed-loop system are constructed. Then, based on the state-space equations of the closed-loop system, the corresponding closed-loop transfer function is determined. Next, based on the performance indices of the closed-loop system's state-space equations and the closed-loop transfer function, convex optimization inequalities are constructed and solved to obtain solutions. Finally, based on the solutions to the convex optimization inequalities, an optimal robust controller model is constructed, and the vehicle's lateral and longitudinal control is performed based on this model. Thus, by considering the vehicle's hardware performance during the calculation process, calculation results that meet the vehicle's performance limits are obtained, solving the saturation nonlinearity problem related to the vehicle's steering wheel angle and acceleration / deceleration.