4results about How to "Precise and reliable control" patented technology

The present application belongs to the technical field of ocean wave power generation, and particularly relates to a quick detachable and mounted OWC pneumatic structure, which comprises a bottom-opened rectangular air chamber, the side wall of the air chamber is provided with an embedded sliding groove matched with the wharf track, the top is provided with a valve structure, the valve structure realizes three working modes of complete closure, bidirectional conduction and only downward conduction through the cooperative action of the fixed valve piece, the moving valve piece stator and the moving valve piece flap, the air chamber can realize self-adaptive adjustment of the tidal level and quick disassembly preparation through controlling the valve mode and matching the sliding groove sliding along the track combined with the locking mechanism. The present application solves the problems of inconvenient disassembly and inability to adapt to the change of tidal level of the existing mounted OWC device, has the advantages of flexible deployment, convenient maintenance and stable energy efficiency, and is suitable for the green transformation of the existing port.

The application discloses an audio playing system, method, driving device and storage medium, and relates to the technical field of audio playing systems. The audio playing system comprises an audio playing platform, which comprises a receiving module, an arbitration module and a first sending module. The receiving module is used for receiving a focus request. The arbitration module is used for performing focus arbitration processing in response to the focus request and obtaining a focus arbitration result. The first sending module is used for sending the focus arbitration result to at least a sound source object corresponding to the focus request, so that the sound source object sends audio data to a shared sound card according to the focus arbitration result. The second sending module is used for sending the focus arbitration result to a control module, so that the control module controls the shared sound card to play the audio data according to the focus arbitration result. The application provides a dedicated audio playing platform to perform focus arbitration, which can effectively coordinate the sound emission sequence in the audio playing system, control the shared sound card to play the audio data, avoid simultaneous sound emission, and improve driving safety.

This application discloses an electronically controlled aging test unit, an aging test cabinet, and an electronically controlled aging test system, relating to the field of electronically controlled equipment testing technology. The electronically controlled aging test unit includes a power interface for receiving DC power; an analog handheld controller signal output circuit connected to a programmable controller to generate multiple analog control signals; a motor drive board connected to the power interface to receive power; the motor drive board is also connected to the analog handheld controller signal output circuit to receive control signals; and an energy recovery circuit connected to the motor drive board to recover energy. By integrating the energy recovery circuit, the electrical signals output by the motor drive board are reused, reducing overall energy consumption and energy waste, thus achieving high resource utilization.

The invention relates to a full-speed-domain efficient control method suitable for an electro-magnetic motor, and the method comprises the steps: collecting the current actual power of the electro-magnetic motor, judging the working state of the electro-magnetic motor and a current operation region in combination with a preset speed domain judgment condition, and calculating a corresponding weighting coefficient; and according to the operation area judgment result of the electro-magnetic motor, the optimal dq-axis current and excitation current under the base speed condition, the switching area condition and the high speed condition are correspondingly determined by utilizing an off-line torque-current distribution table, a pre-established current model and a pre-established voltage model in combination with a weighting coefficient and an air gap flux linkage control module, and the optimal dq-axis current and excitation current under the base speed condition, the switching area condition and the high speed condition are obtained. A current given non-impact switching mode is adopted, the optimal dq-axis current and excitation current under the base speed condition, the switching area condition or the high-speed condition are selected to be output according to the actual operation condition of the electro-magnetic motor to serve as control current reference values, and control over the electro-magnetic motor is achieved. Compared with the prior art, full-speed-domain efficient control over the electro-magnetic motor can be achieved.