Abstract: The present invention relates to a method and apparatus for precise control of a position of a servo motor based on space-time two-dimensional optimization. The method includes the following steps: targeting either one of an angle or a displacement of the motor as a target value; obtaining a set value and a feedback value of the target value; based on the set value and the feedback value of the target value, performing processing by a control algorithm integrating a time dimension and a space dimension to obtain an output of the target value at a time t in a k dimension; and performing corresponding control on the motor based on the output of the target value at the time t in the k dimension.

Abstract: The present invention relates to a method and apparatus for precise control of a position of a servo motor based on space-time two-dimensional optimization. The method includes the following steps: targeting either one of an angle or a displacement of the motor as a target value; obtaining a set value and a feedback value of the target value; based on the set value and the feedback value of the target value, performing processing by a control algorithm integrating a time dimension and a space dimension to obtain an output of the target value at a time t in a k dimension; and performing corresponding control on the motor based on the output of the target value at the time t in the k dimension.

Abstract: The present invention discloses a cloud and edge integrated method and system for identifying parameters of a servo motor. The method comprises the following steps: acquiring parameters of the servo motor; transmitting the parameters of the servo motor to a cloud identification engine and an edge identification engine; performing data processing and identification analysis, by the cloud identification engine, the parameters of the servo motor to obtain an internal resistance of the motor Rs, and sending an identification result to the edge identification engine through a network; identifying, by the edge identification engine, the cloud identification result and the parameters of the servo motor to obtain identification results of d-q axes inductances and a flux linkage. The system comprises a servo motor parameter acquisition unit, a sending unit, a cloud identification engine, and an edge identification engine.

Abstract: Disclosed is a crop yield prediction method and device. The method includes: transmitting an image acquisition instruction to a preset aircraft terminal to acquire a ground image; transmitting a driving instruction at the same time, wherein a distance between a first rail vehicle and a second rail vehicle is inversely proportional to the driving time, a plurality of light channels are embedded between a first rail and a second rail, and a light transmittance of the light channels is able to be affected by the external environment to change; transmitting a light emitting instruction and recording initial data when multiple beams of light are emitted; transmitting a light receiving instruction and recording final data when the multiple beams of light are received; and inputting the ground image, the initial data and the final data into a crop yield prediction model for processing.

Abstract: The present application relates to the field of plant protection unmanned aerial vehicles, and discloses an obstacle-avoiding spraying method and device for a plant protection unmanned aerial vehicle, a computer device and a storage medium. Through special designs, the plant protection unmanned aerial vehicle is capable of avoiding obstacles for spraying operation, and the efficiency of the spraying operations is improved on the premise of preventing from blockage of the obstacles. It should be noted that the obstacle-avoiding spraying method for the plant protection unmanned aerial vehicle of the present application needs to be implemented jointly by three unmanned aerial vehicles, but the special part is that it is unnecessary for unmanned aerial vehicle terminals corresponding to the three unmanned aerial vehicles to communicate and interact with each other, such that the method has a wider application range and is easier to implement.

Abstract: A dust-proof and heat-control device for hydraulic cylinder is provided, including: a fixing sleeve, an annular fan mechanism, a sealing end cap and a dust cover; wherein the fixing sleeve is sleeved on a cylinder barrel of the hydraulic cylinder, the annular fan mechanism is sleeved on the fixing sleeve, the sealing end cap is disposed on an end of the cylinder barrel, a piston rod of the hydraulic cylinder passes through the sealing end cap and the dust cover, the dust cover is fixed on the piston rod, the annular fan mechanism, the dust cover and the hydraulic cylinder enclose an inner space, a side wall of the dust cover is provided with an opening communicating with the inner space, and a filter screen is mounted at the opening. The device and method can achieve good dust proof and heat control effect on axially reciprocating telescopic hydraulic cylinder.