7results about How to "Compensation delay" patented technology

The invention discloses a DC bus voltage feedforward control method based on a non-linear interference observer, and relates to the field of converter DC bus voltage control, and the method comprises the steps: inputting and outputting a differential equation of the DC bus capacitor voltage of a photovoltaic grid-connected system based on a photovoltaic grid-connected inverter, and observing the disturbance in the system based on the differential equation. Designing a non-linear interference observer, and generating a current inner ring reference value based on the output of the non-linear interference observer and the improved feedforward controlled voltage ring. The feed-forward function is added on a traditional voltage loop PI control link, the feed-forward function is a first-order differential link, and time delay caused by DC-AC current loop control response and observer convergence speed can be effectively compensated; the DC bus voltage feedforward control method based on the output result of the nonlinear disturbance observer can effectively suppress the impact of various transient working conditions on the DC bus voltage, and the dynamic performance of a DC bus voltage control system is remarkably improved.

The invention discloses a photoelectric platform control system and method based on an extended state observer, and the method comprises the steps: transmitting a feedback signal of a photoelectric platform to a remote computer in a wireless transmission manner, and arranging a controller and the extended state observer on the remote computer, a control signal calculated by the remote computer is wirelessly transmitted to the photoelectric platform, so that the photoelectric platform is wirelessly controlled on the remote computer. According to the method, remote control of the fast reflecting mirror can be realized, a plurality of photoelectric platforms can be controlled by a single remote computer, the cost is saved, and the computing power of the remote computer is fully utilized. And the expansion state observer is used for observing disturbance errors including wireless transmission errors, so that the anti-interference capability of wireless control is improved.

This invention relates to the interdisciplinary field of mechanical engineering and optical inspection, and discloses a method and system for quality sorting of automotive stamping parts combined with optical inspection. The method includes: synchronous imaging by a high-speed linear array camera and a structured light projector via an encoder and photoelectric triggering device; fusing 3D point clouds and 2D images, and using a deep convolutional neural network for defect identification and quality grading; calculating the six-degree-of-freedom pose of the workpiece using an iterative nearest-point algorithm and principal component analysis; calculating the spatiotemporal parameters of sorting based on a predictive instruction generation module, and issuing dynamic control commands to multi-degree-of-freedom pneumatic push rods via a hard real-time communication bus to execute sorting. The system includes a synchronous triggering unit, an imaging unit, a defect identification unit, a pose calculation unit, a predictive instruction generation module, and a dynamic sorting execution unit. This invention achieves millisecond-level accurate identification and adaptive sorting, significantly improving detection accuracy, sorting efficiency, and system robustness.

According to the intelligent sensing caulking sealing structure and the runway pavement health state monitoring method provided by the invention, the prefabricated sensing rubber strip with the modulus gradient transition embedding material is arranged in the runway shoulder caulking, so that tight coupling and cooperative deformation between the sensing optical cable and the caulking glue made of a silicone material are realized; the problems of modulus mismatch, interface stripping, optical cable bounce and the like are effectively solved, and stable and high-fidelity acquisition of vibration signals is ensured; according to the monitoring method, the system identification technology of center line excitation and runway shoulder response is utilized, the surface wave propagation model and the regularization reconstruction algorithm are combined, the runway center line vibration state is inversed in a high-precision mode from runway shoulder signals, propagation attenuation and time delay are compensated, the monitored space coverage capacity and signal restoration precision are remarkably improved, and the monitoring precision is improved. The low-influence, wide-coverage and continuous real-time monitoring of the stock runway is realized, and finally a more reliable and efficient technical scheme is provided for runway surface health state evaluation and operation safety guarantee.

The invention discloses an unmanned underwater vehicle formation transformation and obstacle avoidance control method with time delay. The method comprises the following steps: constructing an information exchange topological relation among multiple unmanned underwater vehicles based on an undirected connected graph; motion models of the multiple unmanned underwater vehicles are established, the motion models comprise a leader kinematics model and a follower kinematics model, and the follower kinematics model is a double-integral dynamic model considering time delay and nonlinear factors; based on a leader-follower framework, distributed control input is designed, so that a follower tracks a virtual target position, and tracking control of the multi-unmanned underwater vehicle formation is realized; an obstacle avoidance offset is calculated in combination with specific conditions, and the obstacle avoidance offset is applied to an obstacle avoidance formula to realize the conversion of a dynamic path; and the leader triggers a signal to the follower within a set time, and realizes the transformation of the formation pattern based on a preset target position. According to the method, time delay compensation, uncertainty suppression, formation flexible transformation and smooth obstacle avoidance can be comprehensively solved.

This invention discloses an on-chip polarization-insensitive detector system. The system splits arbitrary polarized light into two branches for output (TE and TM modes), and these two branches are then output to both ends of the detector; the output power of the two branches is equal. The system includes an edge coupler, a waveguide interlayer coupler, an on-chip PRBS device, a 1-to-2 optical power splitter, and a detector. This invention's polarization-splitting, wave-splitting, and wave-combining method ensures that any input polarization state can be supplied with almost constant and identical optical power to both ends of the detector, mitigating the large-scale carrier shielding effect while maintaining polarization insensitivity. The incident polarization rotation beamsplitter and the wave-combining polarization beamsplitter use a mirror-image configuration to compensate for the time delays of the TE and TM modes, ensuring low polarization-dependent delays throughout the entire link when the polarization state changes.

The utility model discloses an LC band-pass filter. The LC band-pass filter comprises a filter body and a circuit arranged on the filter body, the circuit comprises an all-pass network module, a band-pass filter network module and an attenuation network module, the input end of the band-pass filter is connected with the output end of the all-pass network module, and the output end of the band-pass filter is connected with the input end of the attenuation network module. The input end and the output end of the LC band-pass filter are connected with the all-pass attenuation network module, return loss, in-band fluctuation, group delay fluctuation and phase linearity of the filter can be effectively improved, dependence on component accuracy is reduced, circuit debugging is simple, cost is low, and good application prospects are achieved.