296 results about "Control engineering" patented technology

The invention relates to a modular multilevel converter (MMC)-based transformer-free four-quadrant high-voltage variable frequency power supply topological structure. A rectifier module and an inverter module have a modular multilevel structure and are formed by a plurality of subunits connected in series. The input side of the topological rectifier module is directly connected with a network-side high voltage through a charging circuit; the rectifier module converts a high-voltage alternating current (AC) voltage into a direct current (DC) voltage and inputs the DC voltage into the inverter module, and the inverter module converts the DC voltage into the AC voltage; and various states of a power system are simulated, and the topological structure has a four-quadrant type and can feed energy back. The topological structure has the advantages of removing the high-voltage transformer at the power input end, lowering cost, reducing volume and weight of a high-voltage variable frequency power supply, reducing consumption of components, and improving work efficiency, has a simple unit structure, and is convenient to wire and easy to disassemble and assemble.

A display control apparatus enables a user to perform a touch operation more simply and easily on a screen including a first item permitting a setting change without screen transition and a second item permitting a setting change after transition of the screen to a different display screen. On a display screen with a plurality of items including the first item and the second item, when a touch-down operation is detected in an area of the first item while the first item is selected, the display control apparatus invalidates a move operation for selecting other items. On the other hand, when a touch-down operation is detected in an area of the second item while the second item is selected, the display control apparatus validates a move operation for selecting other items.

The invention discloses an intelligent laundry rack system and a control method and equipment thereof and belongs to the technical field of intelligent laundry racks. The system comprises a laundry rack body, a monitoring device, external intelligent equipment and a master control MCU, wherein the monitoring device is used for monitoring the ambient environment of the laundry rack body and formingmonitoring data; the external intelligent equipment is used for processing the monitoring data according to a preset algorithm to generate corresponding action instructions; the master control MCU isused for receiving the monitoring data transmitted by the monitoring device, receiving the action instructions transmitted by the external intelligent equipment and controlling the work of functionaldevices according to the action instructions. The intelligent laundry rack system has the advantages that the parameter data of the use environment of the laundry rack body are collected through various sensors to form the monitoring data, the action instructions are generated through the preset algorithm, automatic control of the various functions of the laundry rack system is achieved, the intelligent level and practicality of the intelligent laundry rack system are increased, energy loss is reduced, and convenience is brought to people's life.

A method of controlling lane change of an autonomous vehicle is provided. The method includes determining a type of a command for lane change by an autonomous driving logic of an electronic control unit (ECU) in response to the command for lane change being generated. When the command for lane change is not a specific command for lane change, attributes of each of at least one region included in a change target region is determined using information regarding the change target region. The attributes of each of the at least one region are corrected using information regarding a lane in which the autonomous vehicle is driven and a lane change region is determined from the at least one region based on the corrected attributes of each of the at least one region.

The embodiment of the application provides an aircraft guidance control simulation test method and device. The method comprises the steps: respectively building subsystem models of all controlled objects corresponding to a preset guidance control system model of an aircraft based on historical simulation engineering data of the aircraft; establishing a guidance control simulation system of the aircraft in a virtual simulation environment according to the guidance control system model of the aircraft and each subsystem model; performing simulation verification on the operation state of the guidance control simulation system so as to debug operation parameters of the guidance control simulation system according to a simulation verification result; and accessing preset hardware equipment intothe guidance control simulation system to carry out a semi-physical simulation test for the aircraft. According to the application, the integrated simulation test between the guidance control systemand the controlled subsystem of the aircraft can be effectively realized, and the accuracy and reliability of the aircraft guidance control simulation test can be improved by providing an open and extensible virtual integrated simulation and test environment.

The invention discloses a processing positioning device for a front support of a forklift safety frame. The processing positioning device for the front support of the forklift safety frame comprises a base supporting frame, a row of parallel rollers, a sliding rod, a size board and multiple sliding positioning seats, wherein the rollers are arranged on the top end of the base supporting frame; the sliding rod is fixedly arranged on the top end of the base supporting frame and further located on one end of the one-row rollers; the size board is fixedly arranged on the top end of the base supporting frame and further located between the sliding rod and the rollers; and the sliding positioning seats are sheathed on the sliding rod. With the adoption of the processing positioning device for the front support of the forklift safety frame, during the processing process of the front support of the forklift safety frame, a front support workpiece is directly put on the rollers; next, as long as the sliding positioning seat is fixedly arranged at a corresponding size according to a drawing size before the processing and the front support work piece is positioned by the sliding positioning seat, the mass production can be performed; and in such a way, the working efficiency of processing is improved, the labor intensity is lightened, the procedure of marking-out for a specified size or installing multiple positioning templates is omitted and the correctness and the precision of positioning processing are improved.

The invention relates to an urban rail transit operation control operation and maintenance cooperation system and method. The system comprises an intelligent operation and maintenance subsystem and anintelligent operation and control subsystem, the intelligent operation and maintenance subsystem and the intelligent operation and control subsystem respectively comprise a cooperative linkage enginemodule, and the intelligent operation and maintenance subsystem synchronizes a fault handling plan to the intelligent operation and control subsystem through the cooperative linkage engine module. Compared with the prior art, the method has the advantages of scientific and reasonable scheduling decision, high efficiency, high intelligent degree and the like.

The invention relates to a fuel cell power system monitoring technology. The invention particularly relates to a fuel cell power system platform upper computer monitoring method based on a CAN bus. Anupper computer is connected to a fuel cell controller, a DC/DC and a CAN network of an adjustable load through a CAN bus. A parallel processing multi-thread structure is adopted to receive messagesof the DC/DC, the adjustable load and the fuel cell controller, and display real-time data and curves and stores data of parameters and states of the DC/DC, the adjustable load and a fuel cell engine.The messages are sent to the fuel cell controller and the adjustable load by operating function buttons on an interface of the upper computer and setting control target values of related components,and then manual control, automatic control and forced manual control are conducted on the fuel cell power system platform. According to the method, state monitoring and energy control strategy debugging of the fuel cell power system platform are facilitated, the anti-interference capability is high, and the control performance is stable.

The invention discloses a finished car control model simulation method which can be used for reducing the establishment time of a simulation environment, improving the efficiency and simulating input signals including digital quantity, simulation quantity, a PMW signal and a CAN (controller area network) bus signal. The method comprises the following steps of (1) inputting the analog quantity, the digital quantity and the PWM input signal needed by a finished car control model through a signal builder, a MAT file or an Excel file of the Matlab (matrix laboratory); (2) storing and observing the analog quantity, the digital quantity and the PWM signal in a feedback signal through a scope, display or a MAT file; (3) exchanging an input/output signal of the CAN bus of the finished car control model with the Matlab via CANoe through a vector CANoe tool box.

The invention relates to a full-electric scissor type aerial work platform. The platform comprises a lifting unit, a walking unit, a steering unit and a control unit, wherein the lifting unit comprises a lifting adjusting assembly; the walking unit comprises an electric driving part; the steering unit comprises an electric steering control component; and the control unit comprises a whole machine controller, a lifting unit sensor used for collecting height and speed information of a working platform and a steering unit sensor used for collecting steering angle information of the working platform, and the lifting unit sensor, the steering unit sensor, an electric lifting control component, the electric steering control component and an electric driving component are all connected to a whole machine controller. The whole machine is fully electrically driven, no hydraulic system is involved, the problems that an existing scissor type aerial work platform electro-hydraulic driving system is low in electric energy utilization rate, has the risk of hydraulic oil leakage and is high in maintenance cost are solved, and the purposes of reducing the battery installed capacity of the whole machine and reducing the manufacturing and maintenance cost of the whole machine are achieved through the efficient electric energy utilization rate of a motor.

The invention belongs to the technical field of traffic safety, and particularly relates to an automatic emergency brake control method. However, a current automatic brake control technology cannot give consideration to both early warning time and a safety distance. The invention provides the automatic emergency brake control method. The method comprises the steps of formulating an automatic emergency brake control strategy, wherein the automatic emergency brake control strategy includes an automatic emergency brake control algorithm, a hierarchical control system and a braking force distribution sub-strategy; judging collision danger according to front target motion information and own vehicle motion information, and giving early warning and braking operations; adopting a collision time algorithm in an early warning period, and adopting a safe distance algorithm in a to-be-braked period; sequentially transmitting control signals to a first-layer controller and a second-layer controller so that a control effect and expectation are kept consistent as much as possible; and generating a braking force through the braking force distribution sub-strategy so that automatic braking is achieved. And the safety is ensured, and meanwhile, over-urgent braking is avoided.

The embodiment of the invention provides a biogas fermentation gas supply engineering control system, comprising a master control sub-system, a programmable logic controller (PLC) control sub-system, a local control sub-system and a controlled sub-system, wherein the PLC control sub-system is respectively connected with the master control sub-system and the local control sub-system; the controlled sub-system is connected with the local control sub-system; the controlled sub-system comprises a material collecting unit, a degritting blending unit, a biogas generating unit, an air storage unit, a mud-water separating unit and a biogas power generation unit; the master control sub-system is used for automatically controlling the controlled sub-system through the PLC control sub-system; and the local control sub-system is used for switching the controlled sub-system between a local manual control state and a remote control state. By adopting the system, the instantaneity, the stability and the reliability of a biogas fermentation gas supply system are significantly improved; information management is facilitated; the operating cost is reduced; the working efficiency is improved; an accident is prevented; and the biogas fermentation gas supply engineering control system has high practical application value.

The invention discloses a pneumatic fruit picking robot and a control method. The picking robot comprises a picking vehicle, a rotating mechanism, a picking mechanical arm and a control system, wherein the picking mechanical arm adopts a multi-pneumatic-muscle combined driving mode, the picking mechanical arm is formed by connecting an upper arm, a front arm and a tail end clamping hand in series, the arms are connected through rotating pairs to form three joints, an angle sensor is installed at each joint and used for measuring the rotation angle of the joint, and the multiple pneumatic muscles drive all the joints to rotate in the vertical plane in a symmetrical antagonism type arrangement mode. A master camera on the picking vehicle and a slave camera on the tail end clamping hand form a visual system of the robot to guide the picking work of the robot. The control system is used for processing image information and sensor information and controlling the robot. The picking robot has the advantages of being simple in structure, light in weight, good in flexibility and high in efficiency, and manual labor can be well replaced.

An adaptive balancing mechanism of dual-head cement troweling machine includes a water tank, a screw support base, an adjusting screw, a sensor and controller, a counterweight, a stepper motor, an underframe, a guide rail, a guide rail support plate, limit plates, and a transmission member. The controller collects the weight change information of the water in the water tank in real time according to the operation process. Adjust the position of the counterweight in real time by the stepper motor and the adjusting screw to make the two trowel heads in adaptive dynamic balance to the ground pressure.

Setting of parameters that determine filter characteristics is facilitated. Machine learning of optimizing the coefficients of a filter provided in a motor control device that controls rotation of a motor for a machine tool, a robot, or an industrial machine is performed on the basis of measurement information of an external measuring instrument provided outside the motor control device and a control command input to the motor control device.

The invention belongs to the field of underwater robot control, particularly relates to a bionic robotic fish roll stability control method, system and device based on a reaction wheel, and aims to solve the problem that the posture of a bionic robotic fish is unstable during roll motion in the prior art. The method comprises the steps of arranging the reaction wheel in parallel along the centralaxis of an existing bionic robotic fish, calculating and obtaining a reaction wheel control signal based on obtained roll angle, roll angle speed and tail joint angular speed of the bionic robotic fish, and controlling the reaction wheel to rotate according to the reaction wheel control signal so as to generate a reaction torque for controlling the roll angle of the bionic robotic fish. Accordingto the invention, motion disturbance and environmental disturbance can be reduced to the greatest extent, and the roll stability of the bionic robotic fish is greatly improved. Meanwhile, according tothe principle of the method, not only can the rolling posture of the bionic robotic fish be stably controlled, but also the pitching posture, the yawing posture and other postures of the bionic robotic fish can be controlled, and the practicability is high.

The invention provides a power switch circuit system comprising an intelligent power module which comprises an upper bridge arm driving chip, a lower bridge arm driving chip and a power switch devicecomposed of a plurality of insulated gate bipolar transistors (IGBTs) located on a plurality of bridge arms, wherein the IGBT on each bridge arm comprises an upper bridge arm IGBT connected with the upper bridge arm driving chip, and a lower bridge arm IGBT connected with the lower bridge arm driving chip; a protection circuit externally connected to the output end of the upper bridge arm drivingchip and the output end of the lower bridge arm driving chip in the intelligent power module, wherein the protection circuit comprises a voltage stabilization protection circuit used for stabilizing the voltage of the output ends within a set voltage range; and/or a current stabilization protection circuit used for bypassing the displacement current of the output end to a ground wire. According tothe invention, the voltage stabilization protection circuit and/or the current stabilization protection circuit can be connected in the IPM module, the grid oscillation and parasitic conduction are reduced, and the utilization rate and reliability of the device are improved.