332 results about "Proportional control" patented technology

The invention discloses a paver starting vibration system and a control method, and relates to the technical field of road construction machinery, the control method comprises the following steps: starting a starting stage automatic adjustment mode, setting initial operation parameters, and collecting an actual rotation speed in real time; based on the actual rotating speed, establishing a linear proportional control relation for the running speed, and dynamically adjusting the running speed; and the dynamic adjustment process is continuously carried out, and when specific conditions are met, the mode is automatically switched to the normal mode. The intelligent control that the paving speed is restrained by the vibrating rotating speed is achieved, and the technical problems that in the asphalt paving starting stage, due to the fact that the resistance of the vibrating beam is increased, the actual rotating speed is insufficient, and due to the fact that the vibrating rotating speed is not matched with the paving speed, the pavement compactness is poor, and the flatness is low are solved.

The invention discloses efficient heat dissipation cooling equipment adaptive to a new energy automobile power battery. The efficient heat dissipation cooling equipment comprises a battery frame; the liquid cooling plate is fixedly mounted at the bottom of the battery frame; the second cooling system comprises a refrigerant supply pipe, a refrigerant recovery pipe and a side cooling plate, and the refrigerant supply pipe is fixedly mounted on the side wall of the battery frame; a main pipe inlet of the three-way proportional regulating valve A is connected with the cooling liquid supply main pipe, a branch pipe outlet of the three-way proportional regulating valve A is connected with the first connector pipe, and another branch pipe outlet of the three-way proportional regulating valve A is connected with the second refrigerant inlet; a main pipe inlet of the three-way proportional regulating valve B is connected with the cooling liquid return main pipe, a branch pipe outlet of the three-way proportional regulating valve A is connected with the second connector pipe, and another branch pipe outlet of the three-way proportional regulating valve A is connected with the second refrigerant outlet. Compared with the prior art, the invention solves the problem of low heat dissipation and cooling efficiency of the existing new energy automobile power battery which only controls the temperature through the lower side liquid cooling plate.

The invention provides a neutral-point potential control method and system for a three-level converter, and relates to the technical field of intelligent control, positive bus voltage and negative bus voltage are sampled, a voltage deviation value is calculated, an additional control quantity is generated according to the voltage deviation value and a symbol of alternating current, and the additional control quantity is obtained through a symbol function and proportional control processing; performing amplitude limiting processing on the additional control quantity to obtain an amplitude-limited additional control quantity; superposing the amplitude-limited additional control quantity on the positive modulation wave, negating the amplitude-limited additional control quantity, and superposing the negated amplitude-limited additional control quantity on the negative modulation wave to obtain a final positive modulation wave and a final negative modulation wave; comparing the final positive modulation wave and the final negative modulation wave with a carrier wave, and generating a driving signal of the power device; and the on-off of the switching device is controlled according to the driving signal, so that a corresponding level is output to realize neutral-point potential balance. According to the invention, neutral-point voltage low-frequency fluctuation and direct-current offset suppression can be realized at the same time.

The invention discloses a control method of a gas circuit device, a gas circuit control system and a computer readable storage medium, and relates to the field of gas circuit control. The method comprises the steps that the gas flow of the gas circuit device at the current moment is obtained; determining a gas flow difference value according to the gas flow at the current moment and a preset gas flow value; gas pump control parameters are determined according to the gas flow difference value and gain coefficients, the gain coefficients comprise a proportional gain coefficient, an integral gain coefficient and a differential gain coefficient, and the gas pump control parameters comprise a proportional control parameter, an integral control parameter and a differential control parameter; and the output power of the air pump is adjusted according to the air pump control parameters. The gas circuit device aims at solving the problem that an existing gas circuit device is prone to flow disturbance, and consequently the stability of the gas circuit device is poor.

The invention provides a digital twinning virtual-real synchronization method based on time delay compensation and online correction. The method comprises the following steps: constructing a virtual twinning model and an initial LSTM prediction model; the data acquisition module acquires real-time operation data of a physical entity, processes the real-time operation data to obtain real data, and constructs a time sequence input tensor; inputting the time sequence input tensor into an LSTM prediction model to obtain a physical state prediction value; the physical state prediction value is sent to a virtual-real interaction module and an error correction module, and the virtual-real interaction module forcibly drives the virtual twin model to update to a future state and displays the future state on a Unity visual interface; an error correction module calculates a prediction error between real data and a physical state prediction value, and corrects the LSTM prediction model; and the adaptive synchronization control module dynamically updates the global synchronization period of the next round according to the prediction error by using a bounded proportional control algorithm. The method solves the problems that various delays exist in an industrial scene nowadays, and an existing synchronization method cannot give consideration to the real-time performance, the calculation load, the communication overhead and other aspects.

The present application relates to the technical field of multi-axle vehicle chassis control, in particular to a kind of multi-axle distributed drive vehicle steering system fault tolerant control method: based on fault identification and proportional controller real-time calculation each axle angle proportion relationship, and through wheel angle sensor real-time acquisition wheel angle signal, and according to target angle, the active steering torque of steering motor is calculated by PID controller, so that the angle of each wheel reaches target value. Ensure that multi-axle distributed steering vehicle still has the ability of autonomous movement when steering failure occurs, using the technical solution can improve the mobility of multi-axle steering vehicle when several different wheel steering failures occur, and provide additional protection for the vehicle to still have autonomous movement to repair under the condition of no external rescue.

The invention provides a supercritical carbon dioxide pipeline and storage well linkage flow control method and device, and relates to the field of carbon dioxide geological storage, the method comprises the following steps: determining the pressure deviation between the reservoir pressure and the configured target pressure based on the obtained pipeline data, bottom hole pressure data and reservoir pressure data; based on the pressure deviation, the first opening degree of an injection control valve of supercritical carbon dioxide and the second opening degree of an injection control valve of a corresponding water injection opening in the water injection pipeline are determined. The pressure deviation can be accurately calculated by acquiring the pressure data of the pipeline, the well bottom and the reservoir and comprehensively considering the influence of the pipeline parameters on the pressure. Based on the deviation, the opening degrees of the carbon dioxide and water injection control valves are determined through scientific methods such as proportional control and flow and opening degree curves, and cooperative control over the carbon dioxide and the water injection control valves is achieved. According to the method, the problem that the reservoir pressure is too high or too low due to improper injection flow can be effectively avoided, the carbon dioxide leakage risk is reduced, and the sealing efficiency is improved.

The invention relates to a spaceflight electric propulsion integrated pressure closed-loop proportional storage and supply system and a control method thereof. The system comprises a flow channel integration body, wherein a fluid channel used for containing a propellant is formed in the flow channel integration body; the multiple functional components are detachably installed on the flow channel integration body and communicate with the fluid channel, and each functional component comprises a first pressure sensor configured to sense the pressure of the propellant, a second pressure sensor configured to sense the pressure of the propellant, and a third pressure sensor configured to sense the pressure of the propellant; and at least one proportional valve configured to adjust the pressure of the propellant; and the control circuit is configured to drive the proportional valve according to a signal of the first pressure sensor so as to carry out closed-loop proportional control on the pressure of the propellant. Control hardware and software are integrated in the storage and supply system, real plug and play is achieved, different electric propulsion system users do not need to redesign external control circuits and software for adapting to the system, and the universality, the response speed and the integration degree of the system are greatly improved.

According to the temperature control and SPC statistical system for continuous cyclic cap making, temperature detection focuses on a threaded area on the side edge of a bottle cap, and a temperature data-bottle cap-mold cavity number association is established in combination with a groove of a forming device and double proximity switches; an upper die and lower die two-way independent cooling loop is adopted, the on-off proportion of an electromagnetic valve is controlled and adjusted according to the periodic circulation time proportion, and pressure balance is achieved in cooperation with a cold water bypass electromagnetic valve. An SPC statistical method is introduced, temperature fluctuation and mold cavity consistency are monitored through a control chart after data preprocessing, graded early warning is generated, and cooling parameters are dynamically optimized through a waterway optimization closed-loop unit. Accurate temperature control, abnormity traceability and mold cooling dynamic regulation and control of the key area of the bottle cap are achieved, the product percent of pass and production stability are improved, and energy consumption and maintenance cost are reduced.

The invention discloses a defect detection robot and a water guide and drainage pipe visual and ultrasonic fusion defect detection method, and belongs to the technical field of multi-size hydropower station water guide and drainage pipe defect automatic detection / positioning. The defect detection robot comprises a robot chassis, and two pairs of servo driving wheels and a pair of supporting auxiliary wheels are arranged on the robot chassis and combined to form a six-point supporting structure; the two servo driving wheels on the same side are synchronously driven through a servo driving wheel controller so that differential turning of the robot can be achieved, and high-attraction magnetic attraction annular wheels are detachably arranged on the servo driving wheels. And the supporting auxiliary wheel performs motion control through an electric proportional control cylinder. According to the invention, the function of multi-attitude free crawling in a drain pipe with a smaller inner diameter or a larger inner diameter can be realized, the ultrasonic detection efficiency and the visual detection accuracy are improved, the performance information and the depth information of defects are respectively obtained through visual detection and ultrasonic detection, and the performance information and the depth information are fused to realize crack visualization, so that the visual detection accuracy is improved. And subsequent manual maintenance is facilitated.

The utility model provides an etching chamber cooling system and method. The etching chamber cooling system comprises a cooling plate, a chamber temperature measuring device, a proportional control regulating valve and a cooling water valve, the cooling plate is arranged on the outer side wall of the etching chamber, and a cooling water channel is arranged in the cooling plate. The chamber temperature measuring device is used for measuring the side wall temperature of the etching chamber, and the proportional control regulating valve is used for regulating the proportional control regulating valve to a target angle according to the side wall temperature of the etching chamber; the cooling water valve is used for opening or closing the cooling water channel, and cooling water enters the cooling water channel through the proportional control regulating valve at the target angle. The opening target angle of the proportional control regulating valve can be determined according to the side wall temperature, measured by the chamber temperature measuring device, of the etching chamber, the flow of cooling water entering the cooling water channel is controlled through the target angle, then the temperature adjusting effect of the cooling plate on the side wall of the etching chamber is controlled, the temperature of the etching chamber is uniform and stable, and the etching efficiency is improved. That is to say, the temperature of the etching chamber is kept stable by using the cooling plate provided with the cooling water.

This invention relates to the field of air conditioning technology and discloses a low-noise, low-energy-consumption dual-compressor refrigeration system. It replaces a single high-power compressor with two low-power compressors, with the two low-power compressors having a higher capacity than a single high-power compressor. While maintaining the same power requirement, the system reduces its size and weight through a ring-shaped fixed weight-reduction method, further reducing compressor vibration and noise. Based on the actual low cooling / heating demand, the operating power of the two compressors is proportionally controlled to minimize energy consumption. Especially during battery thermal management, the low-power compressor provides power, further avoiding frequent compressor starts and reducing energy consumption during low-power operation, thus providing better energy efficiency for the entire vehicle. The evaporator is arranged on both sides of the condenser. With dual compressors, the air conditioning system is adjusted from a single circuit to two independent circuits, thus avoiding uneven refrigerant distribution and significant perceived temperature differences between the left and right sides.

A mine dump truck wet disc brake hydraulic system, including main control valve, one end of main control valve is connected pressure oil source, the other end is connected front brake system and middle and rear brake system, front brake system includes brake pedal, front axle proportional control valve group, front axle brake valve group and front brake cylinder, middle and rear brake system includes brake pedal, slow running valve, middle and rear axle brake valve, rear axle proportional valve group, relay valve group, rear axle brake cylinder and middle axle brake cylinder, the utility model discloses a mine dump truck wet disc brake hydraulic system can realize manual operation brake and line control remote brake function, reaches unmanned operation's requirement, is used for unmanned vehicle or auxiliary driving, and in order to adapt to the distance of middle and rear axle of three axle vehicle and the distance of main brake valve group is longer, two relay valve groups are added, brake corresponding speed is improved, faster brake response is realized, makes travel more safe.

An arrangement (10) for softening drinking water, comprising (a) a housing with an inlet (16) connected to a drinking water supply and an outlet (18) for softened drinking water; (b) a softening device arranged between the inlet (16) and the outlet (18) for softening the drinking water; (c) a blending valve (54) for mixing softened drinking water and unsoftened raw water; (d) a motor for adjusting the blending valve (54) to a selected mixing ratio of softened drinking water and raw water; (e) a controller (55) for controlling the motor, characterized in that (f) a server (110) is included, on which data on the hardness of the drinking water supplied by waterworks at the respective geographical position of the arrangement are stored, and a data connection (136, 138, 140, 142) of the controller (55) to the server via a network (112). (110) is included;wherein (g) the server (110) is connected via further data connections (136, 138, 140, 142) to further controllers (55) which control co-acting blending valves (54).;

This invention belongs to the field of linear motor current disturbance suppression, specifically relating to a method and system for suppressing switching current disturbances in a segmented power supply long stator linear motor. It aims to solve the problems of long switching times and large current fluctuations in existing linear motors. The invention includes: real-time tracking and acquisition of the mover position 's' of the segmented power supply long stator linear motor, and calculation of an adjustment factor 'δ' based on the current mover position 's'; applying the adjustment factor 'δ' to the proportional controller, integral controller, and feedforward controller of the segmented power supply long stator linear motor to suppress disturbances during thyristor switching, thereby achieving current disturbance suppression during the segmented power supply long stator linear motor switching process. This invention can effectively suppress the cumulative amplification of disturbance errors during the switching process of the segmented power supply long stator linear motor, achieving a rapid decrease in current and a low overshoot with a rapid increase during the switching process.

A trailer backup assist system and method are disclosed that utilize a steer-by-wire architecture and advanced control algorithms to enable intuitive and stable trailer reversing. A hitch angle determination module measures or estimates the angular relationship between a towing vehicle and a trailer. A proportional controller computes a desired hitch angle rate based on the difference between a target and current hitch angle, and a processing unit converts this rate to a front wheel steering angle using a linearized kinematic model. The system includes a trailer length estimator that passively infers trailer geometry during motion, and optionally applies torque feedback to the steering wheel to guide the driver. Sensor fusion from inertial sensors, mechanical linkages, or vision-based systems enables flexible hitch angle estimation. Experimental results demonstrate that the system stabilizes trailer motion with reduced driver input and prevents jackknifing through adaptive control.

The application discloses a method and a control system for improving the weak power grid adaptability of a grid-connected inverter, and belongs to the field of grid-connected inverter control. The method relates to a control system composed of a main control loop of a novel current controller and a point of common coupling voltage feedforward branch. First, reference currents pass through a first proportional controller, a second proportional controller and a delay module respectively, the outputs of the first proportional controller and the delay module are added by a first adder to obtain a first output signal; meanwhile, a sampling point of common coupling voltage passes through a virtual capacitor link and a repetitive prediction link to generate a second output signal. The first output signal and the second output signal are added by an adder, and then divided by an inverter bridge gain coefficient to obtain a modulation wave. The modulation wave passes through a PWM module to generate a driving signal to drive power devices of the inverter, so as to control an in-grid current.

This invention relates to a system and method for extending the service life of a concentration membrane. The system includes a feed tank, a concentrate tank, and at least two circulating membrane units. Concentration membranes are installed in each circulating membrane unit to concentrate the low-concentration feed solution flowing through the unit to obtain a high-concentration concentrate. A proportional control valve is installed on the return pipeline. A first pneumatic control valve is installed on the return pipeline between the feed tank's return port and the proportional control valve. A second pneumatic control valve is installed on the concentrate pipeline. An online refractometer is installed on the discharge pipeline. The online refractometer is interlocked with the control signals of the first and second pneumatic control valves, controlling their respective valve openings. This invention stabilizes the feed concentration by interlocking the feed concentration with the discharge destination, reducing the osmotic pressure of the concentration membrane, extending its service life, and reducing production costs.

The application provides a low-energy operation precision control system and method for a truck, which comprises a tipping bucket variable pump, an oil return filter, a heat dissipation variable pump, a pressure control valve, a tipping bucket multi-way valve, a tipping bucket control valve group, a tipping bucket rodless cavity pressure sensor, a tipping bucket oil cylinder, a tipping bucket rod cavity pressure sensor, a hydraulic oil radiator, a temperature control valve, a radiator group one, a radiator pump outlet pressure sensor, a radiator control valve, a radiator group two, a radiator pump safety valve and an oil tank. The application can realize linear proportional control, energy-saving proportional control and high-efficiency proportional control of tipping bucket action.

Air conditioning system for a vehicle with an idle-stop function, comprising: an indoor / outdoor air ratio control device (21a, 21b, 28) for controlling an introduction ratio between indoor and outdoor air, wherein the indoor / outdoor air ratio control device (21a, 21b, 28) is installed in a vehicle with an idle-stop function of an engine (11) and has an indoor / outdoor air flap (21a) for switching indoor and outdoor air, which is arranged in an air conditioning duct, which introduces outdoor air from outside a vehicle interior via an outdoor air inlet (21i) and indoor air from inside the vehicle interior via an indoor air inlet (21j) and discharges the outdoor and indoor air into the vehicle interior via a nozzle (21k),wherein the indoor / outdoor air flap (21a) is arranged downstream of the indoor and outdoor air inlet and comprises an indoor / outdoor air flap actuator (21b) for actuating the indoor / outdoor air flap (21a); ​​an air flow rate control device (21c, 28) arranged downstream of the indoor / outdoor air ratio control device in the air conditioning duct and which controls an air flow rate of the air to be introduced; a temperature control device (21d, 28) arranged downstream of the air flow rate control device in the air conditioning duct and which controls the temperature of the introduced air in response to activation of the motor; an air conditioning operating section (29) configured for setting the air flow rate, a temperature, and an indoor / outdoor air mode for air conditioning; and an outdoor air temperature sensing device (31) for sensing the outdoor air temperature, characterized in thatthat the air conditioning system has an air conditioning control unit (28), A / C ECU (28), for performing general control of the air conditioning system, wherein the air conditioning control unit (28) is configured, while the vehicle is in an idle-stop state and the outside air mode is set by the air conditioning operating section (29), to adjust the opening degree of the inside / outside air flap (21a) to a first predetermined opening degree (Θ1) by means of the inside / outside air flap actuator (21b), thereby causing the proportion of outside air to be higher than that of inside air when the outside air temperature (Ta) detected by the outside air temperature sensing device (31) is lower than a first predetermined temperature (T1); to adjust the opening degree of the inside / outside air flap (21a) to a second predetermined opening degree (Θ2) to cause the proportion of inside air to be higher than that of outside air,when the outside air temperature (Ta) is greater than or equal to a second preset temperature (T2), and to adjust the opening degree of the inside / outside air flap (21a) according to the outside air temperature (Ta) to a value between the first preset opening degree (Θ1) and the second preset opening degree (Θ2), when the outside air temperature (Ta) is greater than or equal to the first preset temperature (T1) and lower than the second preset temperature (T2), and the air conditioning control (28) is further configured, while the vehicle is in the idle-stop state, for the air flow control device (21c, 28) to set a blower stage of a blower unit (21c) to a preset blower stage (Lo2) when the blower stage is greater than or equal to the preset blower stage (Lo2), and to maintain the blower stage of the blower unit (21c) at the current stage when the The fan speed is lower than the specified speed (Lo2).

The invention discloses a control method, a control device, equipment and a medium of a semiconductor temperature control system, and the control method comprises the steps: firstly, collecting the working temperature of a to-be-detected object through a temperature detection module, and obtaining an error absolute value between the working temperature and a target temperature; when the error absolute value is larger than a preset temperature error threshold value, the output of the first proportional control unit, the output of the integral control unit and the output of the differential control unit are subjected to superposition processing and determined as coarse adjustment output control quantity; and when the error absolute value is smaller than or equal to a preset temperature error threshold value, at least determining the output of the integral control unit corresponding to the first moment as a fine adjustment output control quantity, and finally, according to the coarse adjustment output control quantity or the fine adjustment output control quantity, a semiconductor refrigeration module is driven to carry out temperature regulation and control. By means of the method, after the error absolute value enters the tiny preset temperature error threshold value, the fine adjustment algorithm is switched, and ultrahigh-precision constant temperature keeping is completed through optimized integral control and output amplitude limiting.

The follower-type pilot-operated water-based proportional valve according to the present invention includes: a valve body having a valve body cavity, a valve inlet, a valve outlet, a first inlet channel, a second inlet channel, and a first return channel; a main valve core defining a first control cavity, a second control cavity, and a return cavity with the valve body, the first inlet channel communicating with the first control cavity, and the second inlet channel communicating with the second control cavity, wherein the main valve core includes a blocking section and a driving section, the driving section being located on the side of the blocking section opposite to the valve body cavity in a first direction, and the driving section having a first working surface and a second working surface opposite to each other in the first direction; a pilot valve core slidably disposed in a first inner hole along the first direction; a lever located outside the valve body, the lever being rotatable relative to the valve body; and a driving device capable of driving the pilot valve core to move in the first direction. Therefore, the follower-type pilot-operated water-based proportional valve according to the present invention has the advantages of simple structure and easy proportional control.

The utility model discloses a large ship engine performance experiment oil supply device, which belongs to the technical field of oil supply devices, and comprises a frame, a manual stop valve is arranged on the frame, the outlet end of the manual stop valve is fixedly connected with a filter, and the outlet of the filter is connected with an oil pump. An outlet of the oil pump is connected to the electric proportional control valve through a pipeline, and an outlet of the electric proportional control valve is connected to an inlet of the oil storage tank. An outlet of the oil storage tank is connected with a mass flow meter through a pipeline, an outlet of the mass flow meter is connected with a manual three-way switching valve, one end of the manual three-way switching valve is connected with a pressure stabilizing energy dissipater, and an exhaust port in the bottom of the pressure stabilizing energy dissipater is connected with a conveying pump. An outlet of the conveying pump is connected with an inlet of the first plate heat exchanger. The utility model provides the oil supply device for the performance experiment of the large ship engine, which can adapt to large-flow and high-fall input and can always keep low-pressure constant output.

An active compensation hydraulic system for a crane includes a controller, a hydraulic pump assembly, a high-frequency response valve control assembly, a proportional control valve assembly, a first locking valve assembly, a second locking valve assembly, a control mode switching valve assembly, and an actuator. The high-frequency response valve control assembly includes a one-way solenoid ball valve, a high-frequency response valve, and a first bidirectional solenoid ball valve. The proportional control valve assembly includes a proportional directional valve and a second bidirectional solenoid ball valve. The first locking valve assembly includes a first two-way cartridge valve and a first balancing valve. The second locking valve assembly includes a second two-way cartridge valve, a second balancing valve, a first shuttle valve, and a first hydraulically controlled directional valve. The control mode switching valve assembly includes a first solenoid directional valve and a second solenoid directional valve. This system features a high-precision active compensation control mode and a simple and reliable proportional control mode, which can be switched between each other, resulting in high system safety and reliability.

Techniques and apparatuses are described that implement two-stage thermal throttling. In some examples, two-stage thermal throttling of a mobile device is achieved using a main controller and an auxiliary controller. The auxiliary controller can be a proportional controller that monitors a temperature and a rate of change of the temperature of the mobile device during operations. When a first temperature threshold and a threshold rate of increase of the temperature are exceeded by the mobile device, the auxiliary controller can throttle a metric of the device to slow down the rate of increase of the temperature. After the temperature has exceeded a second temperature threshold, the auxiliary controller can hand off control to the main controller, which can further throttle the metric of the device or one or more additional metrics of the device.

A first blind hole, a second blind hole and a third blind hole are formed in a valve body in the axial direction, a plurality of first through holes are evenly formed in the side wall of the second blind hole, a valve element is installed in the second blind hole in an axial moving mode, and a plurality of second through holes are evenly formed in the side wall of the third blind hole. A first pressure guiding hole, a second pressure guiding hole and a fourth blind hole are sequentially formed in the yoke, the stop iron is fixedly arranged in the yoke through the mounting plate, a second through hole and a fifth blind hole are formed in the stop iron, a magnetic circuit optimization structure is arranged on the outer surface of the stop iron, the armature is arranged in the fifth blind hole, and a film is arranged between the armature and the inner wall of the fifth blind hole. The ejector rod penetrates through the second through hole, the valve seat is assembled in the third blind hole in a sealed mode, and a spring is connected between the side wall of the fourth blind hole and the valve seat. Through the design of a non-magnetic-isolation-ring magnetic circuit and the variable spring, efficient driving, reliable sealing and switch and proportion control integration of the electromagnetic valve are achieved, the structure is compact, and adaptability is high.

1. Name of the designed product: proportional control actuator. 2. Use of the designed product: used as proportional control actuator. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view.

The application discloses a kind of secondary steam temperature process signal differential control method and system, utilize first subtracter to carry out subtraction operation to secondary steam temperature process signal and the second integrator output second integral signal, obtain feedback output signal;Utilize first integrator to integrate feedback output signal, obtain first integral signal;Utilize second integrator to integrate first integral signal, obtain second integral signal;Utilize first addition module to process first integral signal, obtain first superimposed signal;Second superimposed signal is obtained by using second addition module to process second integral signal;Utilize second subtracter to subtract first superimposed signal and second superimposed signal, obtain first subtraction signal, utilize fixed proportion controller to obtain fixed proportion control signal;Utilize third adder to superimpose secondary steam temperature process signal and fixed proportion control signal, obtain fixed proportion fastest tracking differential signal.The embodiment of the application provides a kind of secondary steam temperature process signal differential control method and system, improve the output tracking input differential tracking efficiency of secondary steam temperature process signal.

The utility model provides an on-site mixed emulsion explosive truck control system based on PID (Proportion Integration Differentiation) operation, and belongs to the field of explosive truck control. The problems that an existing on-site mixed loading emulsification vehicle control system is low in control precision and slow in response time for an emulsion matrix, a sensitizer and a catalyst are solved. Comprising a PLC, an analog quantity input module, an analog quantity output module, a matrix pump rotating speed sensor, a sensitizer flow meter and a catalyst flow meter, and signals of the sensitizer flow meter and the catalyst flow meter are input into the analog quantity input module and then calculated through the PLC. A control signal is output through the analog quantity output module, and then the corresponding material conveying pumps are controlled through the three electro-hydraulic proportional control systems. By calling a PID (Proportion Integration Differentiation) control module in a PLC (Programmable Logic Controller), accurate control on an emulsion matrix, a sensitizer and a catalyst is realized; the device is applied to accurate control of material conveying of the on-site mixed loading explosive truck.

The application discloses an electric power steering system and a vehicle, and relates to the technical field of vehicles, which comprises a controller, a three-phase motor, a main phase line breaker, a main drive bridge, a backup phase line breaker and a backup drive bridge; the input end of the main drive bridge is used for being connected with a main power supply; the input end of the main phase line breaker is connected with the output end of the main drive bridge, and the output end of the main phase line breaker is used for being connected with a first partial winding of each phase of the three-phase motor; the input end of the backup drive bridge is used for being connected with a backup power supply; the input end of the backup phase line breaker is used for being connected with the output end of the backup drive bridge, and the output end of the backup phase line breaker is connected with a second partial winding of each phase of the three-phase motor; the access proportion of the first partial winding is greater than or equal to the access proportion of the second partial winding; and the controller is used for controlling the main phase line breaker to be disconnected and the backup phase line breaker to be closed when a main control loop fails. The system can still provide 100% assistance after a single point failure of one sub-EPS.