4results about How to "Flexible simulation" patented technology

The invention provides a test method and system of a vehicle AEB system, and belongs to the technical field of vehicle test. The method comprises the steps of generating a virtual test scene; collecting simulation video data in the virtual test scene; setting the scene recognition precision of the virtual vehicle, and simulating the message information of the virtual vehicle in the virtual test scene; simulation data including the simulation video data and the message information are sent to an AEB system of the tested vehicle, and a control signal, namely the braking deceleration, of the virtual vehicle is output; converting the brake deceleration into a brake pedal signal; inputting the brake pedal signal into a dynamical model of the test vehicle, and outputting motion information of the test vehicle; updating message information of the virtual vehicle in the virtual test scene according to the motion information; and comparing the updated message information with the standard message information in the braking state, and outputting a test result of the AEB system. The AEB system test accuracy is improved, the test period is shortened, and the test cost is reduced.

The invention discloses a floating transportation towing physical model test system for yaw and deviation correction simulation, which comprises a tug power simulation system, the tug power simulation system comprises a floating transportation towing platform and a jet flow loading facility, and the main body structure of the floating transportation towing platform is composed of a fixed guide rail, a movable trailer and a power supply guide rail. The movable trailer is erected on the fixed guide rail and is driven by a motor, height-adjustable horizontal slideways are erected on cross beams on the front side and the rear side of the movable trailer, hooks with pulleys are arranged on the horizontal slideways, the hooks are connected with the floating transportation component model through traction cables, and the jet flow loading facility is carried on the movable trailer. A mechanical arm, a high-pressure plunger pump and a jet nozzle are arranged, and the jet nozzle and a water supply pipeline are connected to the tail end of the mechanical arm. The invention further discloses a test method adopting the test system. The device has the function of flexibly simulating the transverse loading of the tug, and can realize the complete similar simulation of the component response in the floating yaw process and the deviation correction process.

The invention belongs to the technical field of petroleum engineering well cementation, and particularly relates to a well cementation interface pressure monitoring device and method. The first short section is connected with the inner sleeve; the second short section is connected with the outer sleeve; a cement sheath is poured between the inner sleeve and the outer sleeve; the first short section is used for monitoring the pressure of an interface between the inner sleeve and the cement sheath; the second short section is used for monitoring the second interface pressure between the outer sleeve and the cement sheath; a first monitoring module is installed on the inner wall of the first short section. A second monitoring module is installed on the outer wall of the second short section. The first monitoring module makes contact with one interface of the cement sheath. The second monitoring module is in contact with the second interface of the cement sheath; a data correction module is mounted at the wellhead; the data correction module is in signal connection with the first monitoring module and the second monitoring module. The first monitoring module makes contact with the first interface of the cement sheath, the second monitoring module makes contact with the second interface of the cement sheath, the pressure of the first interface and the pressure of the second interface are monitored in real time, and the real bonding strength of the underground interface is judged.

The application discloses a general geometric random channel modeling method for indoor optical wireless communication, and belongs to the field of wireless communication channel modeling. The method comprises the following steps: setting scene layout and frequency band related parameters; generating object reflection cluster birth-death process matrix and random numbers for controlling blocking effect and propagation component classification; initializing scattering clusters and scattering bodies in the clusters; updating and calculating model parameters changing with space and time; calculating light source radiation intensity, object reflection and particle scattering power distribution, and equivalent reflection coefficient; calculating sub-channel impulse response, judging whether the propagation component exists or not, and generating final channel impulse response. The general indoor optical wireless communication geometric random channel modeling method can depict common characteristics of optical wireless frequency bands and unique characteristics of infrared light, visible light and ultraviolet light frequency bands. Through setting corresponding parameters, the established model can support different frequency bands and can be flexibly used for simulation and performance evaluation of a 6G indoor optical wireless communication system.