3results about How to "Great performance" patented technology

The application relates to a complex curved surface shock wave body counter-design method based on a three-dimensional curved flow surface method, and relates to a hypersonic wave body. The complex curved surface shock wave body is provided with a complex curved surface shock wave body lower surface compression profile, a complex curved surface shock wave body upper surface profile and a complex curved surface shock wave body leading edge profile; the complex curved surface shock wave body lower surface profile and the complex curved surface shock wave body upper surface are connected by the complex curved surface shock wave body leading edge profile. A complex curved surface three-dimensional outflow shock wave is specified, and a wave body capture profile is designed; the complex curved surface shock wave is dispersed into a series of initial flow surfaces; shock wave angles, shock wave curvatures and wave rear parameters are solved; a complex shock wave curved surface wave rear flow field is solved, and a compression profile is determined; a wave body upper surface geometric shape is constructed according to design requirements; and the upper and lower surfaces are connected to form a complete complex curved surface shock wave body geometric shape. The method has higher calculation efficiency and higher precision, and provides a wider performance improvement space for aircraft design through free shock wave selection.

The utility model provides a DTU wireless data transmission terminal which is used for solving the technical problem that an existing industrial controller cannot achieve a wireless remote transmission function. The gas detector comprises a shell, a circuit board is arranged in the shell, a main control chip, an acquisition communication module and a 4G communication module are arranged on the circuit board, the main control chip is respectively connected with the acquisition communication module and the 4G communication module, the acquisition communication module is connected with a controller, the controller is connected with a plurality of gas detectors, and the gas detectors are connected with the 4G communication module. The 4G communication module is connected with the cloud platform and the mobile terminal through the base station, and the cloud platform is connected with the upper computer through a network. The utility model has the characteristics of stable performance, small volume, high cost performance and low cost, and is beneficial to the integration of user equipment and a system; the controller is powerful in function and strong in adaptability, can provide uploading schemes for various controllers, is strong in expandability, and can replace the small communication board according to requirements.

The invention provides a self-adaptive voltage stabilization method of a special electronic load for a fuel cell, and belongs to the field of fuel cells. The method comprises the following steps: S1, setting a required voltage instruction Uref; s2, the voltage loop works, the output voltage U0 detected in real time is compared with the output voltage Uref, the difference value delta U is worked out, a control current signal is output after PID adjustment, and an input instruction value I * of the current loop is obtained; s3, the current loop works, the output current I0 detected in real time is compared with I *, the difference value delta I is calculated, a current control signal is output after PID adjustment, and the input instruction value # imgabs0 of the inductive current loop is obtained; S4, the inductive current loop works, the detected inductive current IL is compared with # imgabs1 #, the difference value delta IL is calculated, a PWM duty ratio signal is output after PID adjustment, and the PWM duty ratio signal is output after PID adjustment. And the conduction time of the load equipment power tube is controlled. The voltage of the fuel cell reactor is stabilized in real time by using the load equipment control loop, a current instruction does not need to be input manually, the voltage stabilization efficiency is improved, the personnel safety is guaranteed, and the method has the advantages of being environmentally friendly, high in timeliness and high in applicability.