940results about How to "Achieve independent control" patented technology

The invention provides a wheel assembly with integration of independent driving, steering, suspending and braking, which comprises a wheel driver, a suspender, a steering device and a braker, whereinthe driver comprises wheels and a wheel hub electric motor, the suspender comprises an upper cross arm, an equal-speed universal joint, a steering joint, a ball head, a lower oscillation arm and a shock absorber, the steering device comprises a steering electric motor, a telescopic universal joint, a driving bevel gear, a driven bevel gear and an absolute encoder, and the braker comprises a braking disk, a pair of float-type braking caliper and a braking hydraulic system. By using vehicle front wheels or back wheels for steering or four wheels for independent steering, the invention realizes zero-radius original-place steering and translational movement along any direction, the line-control driving, line-control steering and line-control braking of the vehicle, and the independent controlon the driving, the steering and the braking of the wheels, and enables the vehicle to run in a best mode.

The invention relates to a package material horizontal casting shaping device. Wherein, it comprises core metal temperature-control pot, package metal temperature-control pot, core metal liquid irrigate tube, package metal crystallizer, drawing device, temperature tester, heating element and secondary cooler; and the producing method comprises the temperature of package metal is kept by the package metal temperature-control pot, passing through the package metal thermal-insulated chamber, irrigates into the casting mould formed by crystallizer and irrigate tube to be solidified into package metal tube; the core metal is solidified in the solidified package metal tube, with he package metal tube to form composite cast ingot; the cast ingot via second cooler is cooled and drawn by the drawing device, to be cut by cutter at certain length. The invention has simple process and lower cost, while the interface between package metal and core metal has non oxidization and non pollution.

The invention discloses an intelligent illumination control system and a method. The system comprises a control center, at least one intelligent road-lamp road-section controller, at least one intelligent road-lamp terminal controller and a plurality of controlled objects; wherein the control center transmits control signals to the intelligent road-lamp road-section controllers and returns operating status parameters of all controlled devices including the controlled objects, the intelligent road-lamp terminal controllers and the intelligent road-lamp road-section controllers, and controls road lamps in all road sections, or road lamps in one road section/a plurality of road sections, or the controlled objects on one lamp post/a plurality of lamp posts; and each intelligent road-lamp road-section controller receives the control signal of the control center and status signals of the intelligent road-lamp terminal controller (to which the intelligent road-lamp road-section controller belongs) and the controlled objects, and controls the intelligent road-lamp terminal controller (to which the intelligent road-lamp road-section controller belongs) according to the control signal. The invention can realize controlling one point by multiple points: multiple light sources with different functions on the same lamp post can be controlled independently or entirely; and a single light source controls all road sections independently.

The invention discloses a coordinated optimization control method of a multi-stack fuel cell power generation system, The topology of multi-stack fuel cell system is established, and then the efficiency of single-stack fuel cell system is calculated theoretically. By analyzing the relationship between the efficiency of single-stack fuel cell system and output power, the overall efficiency of multi-stack parallel fuel cell power generation system is analyzed, and the overall efficiency and load power constraint relationship of multi-stack fuel cell power generation system are established. In accordance with actual t data, The curve of efficiency versus output power is plotted, and the load power is distributed to each stack reasonably by the adaptive power distribution control method of multi-stack fuel cell system. The whole efficiency of the system is taken as the evaluation index to ensure the stable operation of multi-stack fuel cell system with the optimal efficiency.

The invention discloses a vehicle-mounted charger circuit, which has two working modes, i.e. a high-voltage charging mode and a low-voltage charging mode. When the vehicle-mounted charger circuit works in the high-voltage charging mode, the vehicle-mounted charger circuit respectively charges high-voltage and low-voltage batteries, a PWM (Pulse Width Modulation) controller outputs PWM control signals with frequency which is higher than resonant frequency to control a switching tube, direct-current high-voltage power is output through a first winding on the secondary side of a transformer, a first rectifier circuit and a third capacitor to charge high-voltage batteries and direct-current low-voltage power is output through a second winding on the secondary side of the transformer, a second rectifier circuit, a second inductor and a fourth capacitor to charge low-voltage batteries; when the vehicle-mounted charger circuit works in the low-voltage charging mode, the PWM controller controls the switching tube to be turned off and high-voltage battery energy is output to charge low-voltage batteries through the transformer. The vehicle-mounted charger circuit disclosed by the invention can realize independent voltage control during full-bridge dual-winding output.

The invention discloses a differential power steering system used for driving electric vehicle independently by a steering wheel, which aims at overcoming the existing problems of inertia of the steering system and increasing of loading cost in the prior art. A whole vehicle controller (2) is added to the technical proposal of the invention. The differential power steering system of the invention comprises a processor, a pulse input interface circuit, a CAN communication interface circuit 1, an analog input interface circuit 1 and an analog input interface circuit (2), etc. The pins of DI5, DI6, DI7 and DI8 are connected with the wheel-speed sensor (14) by a wire; the pins of CAN2_H and CAN2_L are connected with a wheel-edge motor controller (4) of a right steering wheel by a wire; the pins of CAN1_H and CAN1_L are connected with the wheel-edge motor controller (3) of a left steering wheel by a wire; a power supply interface is connected with a power supply of 12V to 24V; the pins of AI0 and AI1 are connected with a torque in the torque and rotor angle sensor (9) of the steering wheel and the signal wire of the rotor angel by a wire. The differential power steering system of the invention has potential to be used in the traditional vehicle.

The invention discloses an equalizing charge method and an equalizing charger. The equalizing charge method comprises the following steps: (1) connecting N (N is integer and is more than or equal to 2) single batteries in a battery pack in parallel; (2) independently and quickly charging the N single batteries at the same time; and (3) after the single batteries meet the charge requirement, finishing charging the battery pack. The equalizing charge method of the invention changes the series discharge mode of the single batteries of the battery pack into a parallel mode to independently charge the batteries of the battery pack, thus independently controlling the charge process of the single batteries to ensure equalizing charge for the single batteries. The charger of the invention uses a single chip control center as the core, and simply and precisely realizes independent charge and independent control of the single batteries.

The invention discloses a double-temperature control system for a passenger compartment and a power battery of a fuel cell vehicle. An output end of an electric compressor is connected to a port A ofa four-way reversing valve; a port B, a forecabin heat exchange module, a one-way valve parallel connection section, a refrigerant parallel connection section and a port C of the four-way reversing valve are sequentially connected in series; a port D of the four-way reversing valve, a gas-liquid separator and an input end of the electric compressor are sequentially connected in series; the refrigerant parallel connection section comprises a first refrigerant branch and a second refrigerant branch which are arranged in parallel, a cooling liquid outlet of a battery heat exchanger is connected to a cooling liquid inlet of a power battery system, and a cooling liquid outlet of the power battery system, an expansion water tank, a water pump and a cooling liquid inlet of the battery heat exchanger are sequentially connected in series. On the premise that the system is simplified, independent control over the passenger compartment temperature and the power battery temperature is achieved, abattery pack temperature and the battery cooling inlet temperature are adopted as power battery temperature adjusting parameters, the influence of thermal delay is avoided, and the temperature controlprecision of the power battery is improved.

The invention discloses a point-by-point switching distorted nematic liquid crystal (TN) box and a device containing the TN box. The point-by-point switching TN box comprises a first control layer, a second control layer and a distorted liquid crystal. The first control layer comprises two layers of a first electrode and a second electrode which are insulated with each other and have parallel arrangement directions; the second control layer comprises two layers of a third electrode and a fourth electrode which are insulated with each other and have parallel arrangement directions; and the first electrode and the third electrode have vertical arrangement directions. When the first electrode, the second electrode, the third electrode and the fourth electrode have same external voltage, the distorted liquid crystal has natural torsion of 90 degrees between the first control layer and the second control layer. Through the control of external voltage values of the first electrode, the second electrode, the third electrode and the fourth electrode, the TN box can make incident linear polarizing light directly transmit or make the polarization direction of the light twist for 90 degrees, can increase the display area and improve the opening rate and the display quality.

The invention discloses a control method of an intelligent clothing suspension system. According to the control method, the readable-writable IC card data technology is adopted, and the readable-writable IC card data technology is matched with other software/hardware control technologies to realize automatic control on circulation of clothes hangers of the intelligent clothing suspension system between various steps. The method is characterized in that the IC card information of the clothes hangers and a push rod are classified into different types, the information is collected and written in through a come-into-station read head and a come-out-of-station read head, and the circulation of the clothes hangers between a main track and each workstation is realized according to requirements under the combined action of a controller, a terminal and a data acquisition program. The control method of the intelligent clothing suspension system is high in adaptability and intellectualization degree; the complexity of the system is effectively reduced by virtue of the readable-writable technology; the system is high in safety, and the work of the whole system cannot be affected by the fault of one workstation.

The invention discloses a high-precision friction compensation control method of a double-frame magnetic levitation CMG frame system. A double-frame servo system dynamics model is established at first, the coupling moment of the frame system is subjected to feedforward compensation control, the non-linear friction moment of the frame system is estimated by means of a time delay estimator (TDE), the feedback compensation of the non-linear friction moment is carried out by means of TDC, a two-degree freedom IMC is introduced to realize the independent control of the frame system tracking performance and disturbance suppression capability, and meanwhile, the robustness of the TDC is enhanced. The high-precision friction compensation control method enhances the robustness of the frame system to the non-linear friction moment and is suitable for the high-precision friction compensation control of the double-frame magnetic levitation CMG frame system.

The invention relates to a support vector machine inverse system composite controller based on a bearingless synchronous reluctance motor. Two expandable current hysteresis loop PWM (Pulse-Width Modulation) inverters and a bearingless synchronous reluctance motor to be controlled are used as a whole to form a composite object to be controlled; a support vector machine inverse system controller is constructed according to a mathematical model of the object to be controlled and is connected in series before the composite object to be controlled of the bearingless synchronous reluctance motor so as to realize the decoupling control between the electromagnetic torque and the radial levitation force of the motor as well as the radial levitation force in two vertical directions; on the basis, a rotating speed closed loop linear controller and two rotor position closed loop linear controllers are respectively designed for the rotating speed of the motor and the rotor positions to form a linear closed loop controller; an finally the linear closed loop controller, the support vector machine inverse system controller and two expandable current hysteresis loop PWM inverters commonly form the support vector machine inverse system composite controller for dynamically decoupling control on the bearingless synchronous reluctance motor. The control speed, the control precision and the dynamic and static performances of the system can pass parameters for adjusting the linear closed loop controller.

The invention discloses an equalization control method for the power of a plurality of parallel inverters in an island microgrid. The equalization control method comprises the following steps: constructing an alpha-beta coordinate system in a single-phase control system, and calculating the voltage and the power without need of low-pass filtering in the calculation process; and extracting a phase angle of a filtering capacitor voltage in a local controller of all the inverters, and by using the phase angle as reference, transforming a dq coordinate system back to the alpha-beta coordinate system, wherein electric signals are easily transmitted to the local controller from a centralized controller by low-bandwidth communication. The fundamental component of the voltage of the filtering capacitor participates in adjustment of a first quasi-proportional resonance control for the fundamental voltage; the filtering capacitor voltage containing harmonic voltage participates in adjustment of second quasi-proportional resonance control for the characteristic subharmonic voltage. By application of the equalization control method in an equalization control system for the plurality of parallel inverters in the island microgrid under the complex conditions with non-linear loads, different impedances of feeder lines of all the inverters and inconsistent rated capacities, the inverters also can realize equalization control for the output power, and the loop current among all the inverters is effectively inhibited.

The invention relates to a multi-path voice player, which comprises MCU with at least two independent voice inputs for inputting at least two different voices, and inputs are connected to voice signal selector, while MCU will control the selectors to select two paths of voice input to be used two voice outputs of voice output. And its operation comprises: receiving, processing and outputting, while via switching selectors, the voice at relative mode can be selected and output. The invention has low cost and simple operation.

The invention provides an adjacent five-vector SVPWM (space vector pulse width modulation) method based on five-phase six-line topology, belongs to the field of motor control, and aims to solve the problem that the control performance of the conventional SVPWM method under a five-phase five-line topology structure is poor. The method comprises the following steps of step 1, as 12 power switch pipes in five-phase six-line topology carrying out SVPWM has 64 switch states, calculating voltage space vectors corresponding to the 64 switch states, and obtaining 64 voltage space vectors; step 2, judging the position of a reference voltage space vector, selecting five adjacent non-zero voltage space vectors and two zero vectors as action vectors according to the position of the reference voltage space vector; step 3, calculating the action time of the action vectors; and step 4, outputting a bridge arm switch signal by adopting a symmetric modulation mode according to the action vectors and the action time, thereby realizing SVPWM.

The invention relates to the technical field of vehicle chassis, and discloses a steering and roll device of a vehicle and a roll control method. The steering and roll device of the vehicle is composed of a roll mechanism and a steering mechanism, a certain angle is formed between the left and right steering arms and the left and right knuckles, which are fixedly connected with each other, the twomechanisms share the body and the main shafts of the left and right steering knuckles. The small left steering arm and the large left steering arm rotate relative to the axis of each arm self-adaptively. The small right steering arm and the large right steering arm rotate relative to the axis of each arm, the independent control of the vehicle steering and body roll can be achieved, steering androll, independent roll or independent steering can be achieved during the driving process of the vehicle. The wheelbase of vehicle does not change. The vehicle body rolls when the method is applied tothe steering of the vehicle, so that the vehicle automatically rolls at a certain angle to resist centrifugal force or overturning force when steering or driving on an inclined road, so as to maintain a stable driving attitude.

The invention discloses a construction method for an FNN (fuzzy neural network) inverse controller of an AC (alternating current) electromagnetic levitation spindle based on rough set theory, comprising the steps as follows: taking a second derivative of a composite controlled object expected to output as input of an FNN inverse system based on the rough set theory, determining a basic structure of the FNN inverse system based on the rough set theory, selecting static experimental data, training offline the FNN based on the rough set theory to implement inverse of a composite controlled object model, constructing the FNN inverse system based on the rough set theory, constructing an inverse system of the composite controlled object by adopting an FNN inverse method based on the rough set theory, and coupling an AC electromagnetic levitation spindle system which is a nonlinear, strongly coupled multi-input multi-output system into a pseudo linear system. According to the construction method, independent control among 5 DOF (degree of freedom) offset variables of the AC electromagnetic levitation spindle can be implemented; meanwhile, better control performance and load disturbance resistance capacity can be acquired.

The invention discloses a three-pipe-control total-heat-treating multi-split air conditioning system and an independent temperature and humidity control method. The system comprises an indoor unit, an outdoor unit, a high-pressure air pipe, a low-pressure air pipe, a high-pressure liquid pipe, a second electromagnetic valve and a third electromagnetic valve, wherein a first end of the outdoor unit is connected with one end of the high-pressure air pipe, the other end of the high-pressure air pipe is connected with a first end of the indoor unit and one end of the third electromagnetic valve, and the other end of the third electromagnetic valve is connected with a second end of the indoor unit; a second end of the outdoor unit is connected with one end of the low-pressure air pipe, the other end of the low-pressure air pipe is connected with a third end of the indoor unit and one end of the second electromagnetic valve, and the other end of the second electromagnetic valve is connected with a second end of the indoor unit; and a third end of the outdoor unit is connected with one end of the high-pressure liquid pipe, and the other end of the high-pressure liquid pipe is connected with a fourth end of the indoor unit. With the adoption of the system and the method, mounting and construction costs of long piping can be reduced, and the universality is improved.

The invention provides an air conditioning system which independently controls temperature and humidity and a refrigeration /dehumidifying method. A cooling media circulation system, a water circulation system and an air supply system of an air duct machine are assembled to realize independent control of the temperature and the humidity, thus greatly improving comfort of a user and realizing energy saving.

The invention discloses an intelligent street lamp control system. The intelligent street lamp control system includes street lamp control terminals, street lamp monitoring sub-stations and a street lamp management center; the street lamp control terminals acquire the voltage, current and power information of street lamp nodes and upload the data to the street lamp monitoring sub-stations; the street lamp control terminals receive commands issued from the street lamp monitoring sub-stations and execute operation so as to realize switching control and brightness adjustment of street lamps; the street lamp control terminals analyze and process received data packets, and send and receive data through radio frequency transmission modules; and the street lamp monitoring sub-stations maintain the node information of all street lamp control terminals on roads where the street lamp monitoring sub-stations are located, and transmit corresponding data to the street lamp management center. According to the intelligent street lamp control system of the invention, a GPRS public wireless communication technology and short-distance wireless communication technology-combined scheme is adopted, and the advantages of the GPRS public wireless communication technology and the short-distance wireless communication technology can be combined, and therefore, the problem of high cost can be solved, the complexity of the system is reduced, and the intelligent street lamp control system is practical, is convenient to manage, assist in saving energy and can realize intelligent control.