8results about How to "Avoid control error" patented technology

This invention discloses a method for generating sickle bend control strategies based on deep reinforcement learning, comprising: collecting intermediate slab data during the hot roughing and rolling process of strip steel as sample data and performing data preprocessing; establishing and training a sickle bend amount prediction model based on the XGBoost algorithm to build an intelligent agent environment for generating the sickle bend control strategy model; establishing a sickle bend control strategy generation model based on a deep deterministic policy gradient algorithm; training the sickle bend control strategy generation model and saving the model parameters; inputting the intermediate slab data from the hot roughing and rolling process of strip steel into the trained sickle bend control strategy generation model, and outputting the intermediate slab sickle bend adjustment strategy. This invention, through automatic control, can effectively avoid control errors caused by current reliance on human experience, reduce manual intervention, and lower labor intensity. Simultaneously, controlling the straightness of the roughing slab provides a strong guarantee for the stability of finishing rolling production.

The application provides a wing parachute track tracking method for complex environment, and belongs to the technical field of wing parachute track tracking control, and comprises the following steps: a six-degree-of-freedom model of the wing parachute is established to describe the position and posture of the wing parachute in the movement process; a reasonable structure and loss function are selected, and a long short-term memory network (LSTM) for predicting instantaneous speed is trained through a back propagation algorithm; the error between the actual track and the expected track is calculated through a lateral track error method to realize lateral control of the wing parachute; and the predicted instantaneous speed, the expected track and the actual track error are taken as inputs to realize tracking control of the wing parachute through a sliding mode controller. In the case that the measurement information is limited, the instantaneous speed of the wing parachute is predicted through the LSTM, and the track tracking of the wing parachute is realized in combination with the sliding mode control. Compared with the traditional control method, the method provided by the application has higher reaction speed and robustness, and can realize fast and stable track tracking of the wing parachute.

The invention relates to the technical field of valves, and discloses a quick connector with an overflow valve function, which comprises a connector used for connecting an air inlet end and an air outlet end and providing the overflow valve function; the butt joint assembly is arranged on one side of the connector, and sealing and quick detaching are achieved through multi-structure clamping; the control system is arranged in an inner cavity of the connector and used for being connected with the sensor to control the magnetic force of the electromagnet. The cut-off assembly is arranged on one side of the connector and controls the magnetic resistance between the electromagnet and the valve element by being powered on so as to control the medium flow; the cut-off assembly further comprises an assembly block. Through magnetic resistance adjustment between the electromagnet and the valve element, the flow of gas or liquid can be accurately controlled, dynamic adjustment of media in a system is achieved, the common lag and abrasion problems in traditional mechanical valve control are avoided, and adjustment is more flexible and efficient through accurate control of the electromagnet.

The embodiment of the invention discloses a water level detection control method for a heat preservation tank of a water purifier, and relates to the technical field of water purifiers, and the method comprises the following steps: under the triggering of a water supplementing signal and / or a water taking signal, collecting a real-time water level height sequence of the heat preservation tank within a preset time, and fitting the real-time water level height sequence to obtain a real-time water level height sequence; determining an incidence relation model of the water level height and the water level change time; and when the heat preservation tank is in the water supplementing process or the water taking process, the operation parameters of the water pump and / or the heating body are / is controlled according to the incidence relation model. The real-time real flow velocity can be dynamically measured through the incidence relation model of the water level height and the water level change time, and control errors caused by flow velocity fluctuation are avoided; under the dynamic operation working condition, the operation parameters of the execution mechanism are adjusted in real time through the incidence relation model, the technical problem that the water taking amount is inaccurate in the water taking process is solved, the water level rising trend can be monitored in real time according to the model during water supplementing, and water level overflow is effectively prevented.

The invention discloses an unmanned ship with a high-precision connecting structure for ocean observation, and relates to the technical field of ocean environment observation sailboats. The unmanned ship with the high-precision connecting structure for ocean observation comprises an outer ship body, and a groove is formed in the outer ship body; an expandable solar panel structure is arranged on the upper portion of the front side of the outer hull, a hull positioning and moving structure is arranged in a groove of the outer hull, energy is accurately supplied through the expandable solar panel structure by means of double servo motors and the like, and a connecting rod sliding sleeve and a protective supporting plate are kept stable; the expandable connection operation structure flexibly adapts through a fourth servo motor and the like, the buffer linkage and adaptation structure stably operates, the ship body positioning and moving structure accurately controls poses through a fifth servo motor, a sixth servo motor and the like, and bevel gear transmission and a limiting sliding rod improve reliable sailing. The unmanned ship is long in endurance, high in task adaptability and accurate in navigation level control in ocean operation, and powerful support is provided for ocean observation and the like.

The present invention discloses a relay protection circuit based on high-precision zero-crossing detection, comprising a rectifier circuit, a signal generating circuit, a filtering circuit, a shaping circuit and a processor which are electrically connected in sequence, wherein: the rectifier circuit is used to convert alternating current into a positive waveform voltage; the signal generating circuit comprises a first diode, a first capacitor, a ninth resistor, a first transistor and an optical coupler, and the on-off of the optical coupler is realized by controlling the switch of the first transistor; the processor is connected to at least one relay, and is used to receive an output signal and record the number of times the relay is operated, and receives a first output signal when the optical coupler is turned off, and receives a second output signal when the optical coupler is turned on, and determines that it is the zero point of alternating current when the second output signal is detected to change to the first output signal, and controls the relay to be on and off at the zero point of alternating current. The device can realize the accurate on-off of the relay at the zero point of alternating current and can control the actions of multiple relays at the same time, and has a long service life, high precision, small size, low cost, stability and reliability.

This invention discloses a fault control method and system for distribution networks, belonging to the field of fault control technology. The method comprises: acquiring the voltage and current signals of the converter grid connection point based on the distribution network to be controlled, and determining the operating state of the distribution network to be controlled; if it is an asymmetrical fault operating state, then blocking the active and reactive power loops of the distribution network to obtain the positive-sequence voltage component, the negative-sequence voltage component, and the positive and negative-sequence virtual internal potentials of the converter; calculating the positive and negative-sequence virtual impedance coefficients based on the above data; calculating the positive and negative-sequence virtual impedances based on the above data; and inputting the positive and negative-sequence virtual impedances into the distribution network to be controlled and reacquiring the voltage and current signals of the converter grid connection point to redetermine the operating state of the distribution network to be controlled until it is in a normal operating state. The fault control method for distribution networks provided by this invention can achieve stable control of new distribution networks under fault scenarios, ensuring the safe and efficient operation of new distribution networks.

The invention discloses a magnetorheological intelligent variable stiffness bearing, which relates to the technical field of building seismic isolation, and comprises a lower base plate and an upper base plate, a separator ring is installed between the lower base plate and the upper base plate, a high-damping rubber bearing is installed inside the separator ring, a return ring is fixedly connected inside the separator ring, and the return rings are evenly distributed on the circumference of the high-damping rubber bearing, magnetorheological dampers are arranged on adjacent sides of the outer walls of a plurality of return rings, and an evenly distributed self-adjusting mechanism is installed on the inner wall of the separator ring for adjusting the stiffness of the magnetorheological damper, an auxiliary magnetic mechanism is arranged between the lower base plate and the upper base plate, the auxiliary magnetic mechanism is arranged outside the magnetorheological damper, and steering assemblies are respectively installed at both ends of the magnetorheological damper; the self-adjusting mechanism can be automatically adjusted during an earthquake, thereby extending the service life of the magnetorheological damper, and the adaptation assembly can realize precise control of the magnetorheological damper, thereby greatly improving the control effect of the bearing on structural vibration.