35results about How to "The control method is easy to implement" patented technology

The invention discloses signal dynamic control technology of a junction intersection of an expressway exit ramp and a local road. The signal dynamic control technology comprises the following steps: data collection: automatically obtaining real-time traffic flow data through video detectors arranged in the exit ramp in an expressway and in a junction intersection area of the exit ramp and the local road, wherein the real-time traffic flow data comprise a vehicle queue length of the exit ramp, and the vehicle queue length, a traffic volume and a vehicle arrival rate of each lane in each drivingdirection of each entrance lane of the junction intersection, and judging the operation condition of the traffic flow of the current junction area at different moments. According to the signal dynamic control technology disclosed by the invention, the signal control of the junction intersection of the expressway exit and the local road is optimized based on video real-time traffic information, sothat the occurrence of the decline of the traffic capacity of the expressway main line caused by the congestion of the junction intersection of the exit ramp and the local road can be prevented moreeffectively, the occurrence of traffic congestion is avoided, the traffic efficiency of the junction area and the expressway is maximized, and the signal dynamic control technology has a wide application range.

The invention discloses a large-scale energy storage direct current high-voltage control system and control method therefor. The large-scale energy storage direct current high-voltage control system comprises a large-scale energy storage battery, a load/charger, a fuse protector, a dual-channel high-voltage direct current circuit breaker, a pre-charging relay, a general positive relay, a general negative relay, a low-voltage power supply, an emergency stop switch, a battery management system, a Hall sensor, a red indicating lamp, a green indicating lamp and a gold resistor. The large-scale energy storage direct current high-voltage control system is more strict in safety control, and through fusion protection and multiple safety protection of the direct current high-voltage circuit breaker, the general positive relay, the general negative relay, the emergency stop switch and the like, safety of the large-scale energy storage system can be ensured; and meanwhile, the control method forthe large-scale energy storage direct current high-voltage control system can be realized easily, and through modular setting, the generated codes can better satisfy logic control without causing faults.

The invention discloses a synchronous control method for an uncertain time-delay chaotic system. The method comprises the following steps that: A: according to a master and slave chaotic system mathematical model, determining a synchronous error system; B: determining a sliding mode surface equation; and C: according to the synchronous error system and the sliding mode surface equation, designingan adaptive sliding mode controller. The control method adopted by the invention is easy in implementation, can have a wide application prospect in the fields, including radars, secure communication,electronic countermeasure and the like, the safety of secure communication is improved, and control efficiency is greatly improved.

The invention discloses a power output control method and a power output control system for a fuel cell power generation array system. According to the present invention, by collecting the output voltages and the inductance current signals of each DC/DC circuit in each fuel cell system, low-frequency ripple control is stabilized to obtain a switch-on time and a switch-off time, such that a switchcontrol signal is generated so as to carry out DC/DC converter control; the control system comprises a data acquisition module, an outer loop voltage control module, a slope calculation module, a switch control module and a modulation and demodulation module; the slope transformation of the inductance current under the switch control is calculated to obtain a duty ratio, and the switch signal is controlled by the modulation and demodulation module so as to carry out DC/DC converter control; the performance of the DC/DC converter is improved by stabilizing the low-frequency ripple control; andthe multi-stack fuel cell uses the parallel topology structure and controls the mean current, such that each stack in the fuel cell array can output the required power.

The invention provides a hydraulic system, a motor sweeper hydraulic system and a motor sweeper with the motor sweeper hydraulic system. The hydraulic system comprises a hydraulic oil tank, a hydraulic pump, an oil conveying pipe, an oil return pipe, at least one oil pipe and a plurality of hydraulic motors. The hydraulic oil tank is provided with a hydraulic oil inlet and a hydraulic oil outlet. The hydraulic pump is provided with a hydraulic pump inlet and a hydraulic pump outlet, and the hydraulic pump inlet is communicated with the hydraulic oil outlet through a pipe. The oil conveying pipe is communicated with the hydraulic pump outlet. The oil return pipe is communicated with the hydraulic oil inlet. The two ends of the oil pipes are communicated with the oil conveying pipe and the oil return pipe respectively. At least two hydraulic motors are connected to one oil pipe in series. Compared with a hydraulic system in the prior art, according to the hydraulic system, the number of branches from the oil conveying pipe to the oil return pipe is lowered, the requirements for the hydraulic oil tank and a gear pump are lowered, and equipment cost is greatly reduced.

The invention discloses a PI (Proportional-Integral) partition control method for an inverter system, which comprises the steps of performing partition division on the working state of the inverter system, judging the current working state of the inverter system when the inverter system is in operation, and selecting a corresponding PI parameter group to perform control on the inverter system according to the current working state of the inverter system. PI control at the DC side and the AC side of the system is carried out in a partition mode according to a predetermined judgment mechanism; asoft start interval, a large load interval, a large load reduction interval and a stable working interval respectively correspond to different PI parameter groups; and each parameter groups include adifferent proportional coefficient Kp, integral coefficient Ki and PWM duty ratio saturation amplitude limit Lim, thereby enabling the system to always maintain the optimal state when being suddenlyswitched in different working conditions such as no load, light load, heavy load and full load, not only have fast response, but also have safe steady-state output.

The invention relates to a urea hydrolysis reactor control method based on the heat feed-forward signals, which comprises the steps of 1) acquiring a transfer function from a hydrolysis rector load to heating steam consumption; 2) generating a path of heating steam consumption signals through the transfer function by a hydrolysis rector load instruction, and converting the heating steam consumption signals into corresponding first heating steam governing valve openness signals; 3) generating second heating steam governing valve openness signals through a governing valve openness control function by a hydrolysis rector pressure deviation signals, and acquiring a deviation value; 4) leading the first heating steam governing valve openness signals into heating steam governing valve openness automatic control logic to act as feed-forward signals, and determining an openness reference value; and 5) weighing the heating steam governing valve openness reference value and the deviation value, outputting the weighed heating steam governing valve openness reference value and the weighed deviation value so as to acquire heating steam governing valve openness signals under variable load conditions. The control system provided by the invention comprises a PLC (programmable logic controller) which is used for receiving the hydrolysis reactor load instruction, a hydrolysis reactor pressure set value and measurement signals.

The invention discloses a TCR type SVC voltage control method used in a transformer substation. The method comprises the following steps: the control objective fixed value as well as the adjusting dead area of 220/500 kV voltage and the limit value as well as the TCR power output upper and lower limit values of 10/35 kV voltage are set respectively; the 220/500 kV voltage and the 10/35 kV voltage are measured and judged; aiming at the different 220/500 kV and 10/35 kV voltages, different TCRs as well as the adjusting order and the adjusting method of a capacitive compensating branch are adopted. The method can effectively integrates the level of the 10/35 kV voltage while controlling the 220/500 kV voltage of the transformer substation, thereby avoiding the frequent switch of the capacitive compensating branch, considering the demands of various complicated working conditions, and having wider applicability; at the same time, a self-regulating factor fuzzy controller is adopted to control the TCR output, and an error weighting coefficient which automatically adjusts according to the error magnitude is introduced to satisfy the demands of different control stages, thereby improving the whole control effect.

The invention discloses a direct-current motor single chip microcomputer driving method and a driving system for implementing the method. The driving system comprises a single chip microcomputer, an LED (light-emitting diode) display module, a key setting module, a PWM (Pulse-Width Modulation) signal generating circuit, an output snubber circuit and a speed collecting module. The control method is based on a single chip microcomputer system, changes the size of an average voltage according to the duty cycle of voltages on an armature of a direct-current motor and fundamentals of PMW speed governing and accordingly controls the rotation speed of the motor and achieves smooth speed regulation of the direct-current motor, and controls changes of speed through the single chip microcomputer. The driving system is simple and reasonable in overall circuit design, skillfully combines a single-chip microcomputer technology, enables various control functions and algorithms to be completed by utilizing software technologies, provides more flexibility for the control of the direct-current motor, achieves higher performance, meanwhile, can save manpower resources and reduce system costs so as to effectively improve working efficiency.

The invention discloses a transcritical carbon dioxide heat pump system control method. The method comprises the steps that A, a transcritical carbon dioxide heat pump system is subjected to static analysis; specifically, the method comprises the following steps that B, the control state conversion of the transcritical carbon dioxide heat pump system is judged, and whether dynamic control needs to be carried out or not is determined by analyzing historical data; and C, collecting and analyzing system parameters to perform dynamic control. According to the water pump, the traditional energy supply efficiency can be improved, and particularly, the CO2 heat pump water heater or the mixing system comprising the water pump is acknowledged to be good in various parameters at present.

The invention discloses a stepping motor control method and a control device implementing the stepping motor control method. The control device comprises a 16-bit single chip microcomputer SPCE061A, a drive chip L298N, a keyboard, a Sunplus single chip microcomputer and a 74LS164 device, wherein the drive chip L298N, the keyboard, the Sunplus single chip microcomputer and the 74LS164 device are connected with the single chip microcomputer SPCE061A. The drive chip L298N and a stepping motor are connected with the single chip microcomputer SPCE061A, and the 74LS164 device is connected with a nixie tube. The stepping motor control method is easy to achieve, simple and convenient to operate and simple in control step. The control device is simple and reasonable in whole circuit design, small in size and convenient to use and control, the problem of miniaturization of the stepping motor is solved, and the accuracy of the stepping motor is improved. In addition, the control device has a displaying function and a voice function, so that an operator can conveniently know a working state of the stepping motor at any time, the working quality is effectively improved, the work efficiency is improved, and large-scale popularization and application are facilitated.