338results about How to "Simplify the control problem" patented technology

Provided is a method for realizing S curve acceleration and deceleration of a motion control system. (1) The realization condition of S curve acceleration and deceleration is as follows: the basic limiting condition formula of the S curve acceleration and deceleration control process is shown as formula (6): t0=t2-t1=t4-t3=t6-t5, at0=at1=-at4=-at5 and Vt0=Vt2-Vt1=Vt3-Vt4=Vt5-Vt6; and the complete S curve acceleration and deceleration process satisfies formula (7): L/VL>=t0+delta t(1-2)+delta t(3-4)+delta t(5-6), and aM<=aMax. (2) Recursion formulas of S curve acceleration and deceleration are as follows: the initial velocity is set to V0, the current sampling time is k, the corresponding accelerated acceleration is Jk, the acceleration is ak, the velocity of movement is Vk, and the recursion formulas based on the previous time are respectively formula (8): Jk=JM (0<=t<=t0, t5<t<=t6, 0<=k<=nt0, nt5<k<=nt6), Jk=0 (t0<t<=t1, t2<t<=t3, t4<t<=t5, nt0<k<=nt1, nt2<k<=nt3, nt4<k<=nt5) and Jk=-JM (t1<t<=t2, t3<t<=t4, nt1<k<=nt2, nt3<k<=nt4), formula (9): a0=0 and ak=a(k-1)+Jk*delta t, and formula (10): V0=0 and Vk=V(k-1)+ak*delta t.

The invention relates to a three-dimensional elliptical vibration cutting device, belonging to the field of cutting and ultra-precision cutting machining of materials which are difficult to machine. A diamond cutter is guided through flexible hinge mechanisms respectively along an X direction, a Y direction and a Z direction, and further, is driven by three piezoelectric stacks respectively alongthe X direction, the Y direction and the Z direction; the piezoelectric stacks of the X direction and the Z direction are preloaded by preloading screw bolts along respective axial direction; the piezoelectric stack of the Y direction is preloaded through a screw bolt screwing wedge; the preloading processes of the three directions are mutually independent; through regulating and matching the initial phase position and the amplitude of a driving signal for each of the three piezoelectric stacks, the projections of the cutter location point movements of the diamond cutter in an X-Y plane and aY-Z plane are elliptical motions, and the projection of the cutter location point movements of the diamond cutter in an X-Z plane is reciprocating elliptical motion or linear motion. The three-dimensional elliptical vibration cutting device has a novel and simple structure, is easy to implement, and is beneficial to obtaining the best cutting machinability of the diamond cutter.

In a storage system implementing journaling for data backup and restore, users are able to easily determine information regarding amounts journal data generated over specified periods of time. Flexible and automatic adjustment of the journal area is enabled by providing the user with the information on the relationships between the amounts of journal data generated over periods of time. Also dynamic allocation of storage capacity from free space may be applied to the journal volume on an as-needed basis, and may be used to minimize the size of the journal volume when certain journal entries are determined to be no longer needed. Thus, users are able to determine an appropriate size of a journal area in accordance with requirements for predetermined preservation periods for backup data. Thereby, management of the journal area is simplified and the costs to manage the journal area are reduced.

The invention provides an electric vehicle charging station system based on an AC/DC double bus. The electric vehicle charging station system based on the AC/DC double bus adopts a system framework of the AC/DC double bus, connection of the bus with multiple subsystems, modularization in each subsystem and dual data interaction channels, and has the complete function of the electric vehicle charging station system. The electric vehicle charging station system based on the AC/DC double bus takes a bidirectional converter as the core, the AC side of the bidirectional converter is connected with the AC bus, the DC side of the bidirectional converter is connected with the DC bus, and energy flows bi-directionally between the DC and AC buses through the bidirectional converter. The DC bus is connected with an energy storing subsystem, a photovoltaic subsystem, a wind power subsystem and a plurality of DC charger subsystems. The AC bus is connected with an electric supply access subsystem, an active power filter APF access subsystem, a diesel engine generator access subsystem and a plurality of AC charger subsystems. The quantities and the capacities of the AC charger subsystems and the DC charger subsystems can be flexibly selected according to actual needs. The electric vehicle charging station system based on the AC/DC double bus is flexible in configuration and high in power supply reliability, enables the electric vehicle charging station load to combine with new energy power generation, and realizes the sustainable and stable operation of the system.

The invention discloses an intelligent gateway control method and device and intelligent gateway, which includes voice acquisition module, network connection module and execution module; voice acquisition module is used for collecting information by voice control; the network connection module is used to read the speech control information, and upload information to the server where communication connection is controlled by voice, the corresponding control command is obtained by the voice server through parsing the voice control information; the network connection module is also used for receiving the control commands made by voice server; the command executing module is used for the implementation of the corresponding operation according to the control command. Thus, the user data communication among users and intelligent gateway is realized. Therefore, it simplifies the management control and intelligent gateway, finally effectively solves the problem of traditional intelligent gateway where the operation is complicated and hard to manage effectively during network management and intelligent control.

The invention provides a liquid cooling self-excitation type eddy current retarder with a salient pole structure, belonging to the field of automobile braking. The liquid cooling self-excitation type eddy current retarder comprises a retarder rotor (9), a retarder stator (5), a retarder coil (8), a retarder generator and a control module, wherein the retarder rotor (9) is a tooth-shaped rotary plate; the axial half-section of the tooth-shaped rotary plate is a reverse h shape; two bulges at the both sides of a dentate disc are two salient poles of the retarder rotor (9); the retarder rotor (9) is connected with a transmission shaft (13); the inner circle of the retarder stator (5) and the outer circle of the retarder rotor (9) are coaxial; and the retarder coil (8) is an individual coil, is mounted between the two salient poles of the retarder rotor (9), and is fixedly connected with the retarder stator (5). According to the liquid cooling self-excitation type eddy current retarder provided by the invention, the electric energy is saved and the large impact to an automobile storage battery when the retarder is started is avoided by using a self-generating manner; and the coil is sleeved in the middle of a rotor disc by using the individual coil which is wound in a concentrated manner, so that the winding, the installation and the control of the coil can be simplified.

A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage, exciting a winding of the motor with the rectified voltage and freewheeling the winding when current in the winding exceeds a threshold. The winding is freewheeled for a freewheel period, which is updated in response to a zero-crossing in the alternating voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system.

The invention discloses an energy management control method of a photovoltaic energy storage system. The energy management control method comprises a photovoltaic energy storage system configuration method, a concentrated energy storage system control method and a distributed energy storage system control method. Compared with a mixed energy storage structure, the energy management control method adopts a concentrated energy storage and distributed energy storage layered control manner, and global control and partial control can be conveniently and effectively carried out on the photovoltaic energy storage system; a control circuit and a control process are simplified and the control efficiency is improved; by optimizing the concentrated energy storage and distributed energy storage control methods, the photovoltaic utilization rate can be effectively improved and bus voltage is stabilized; and with the adoption of a storage battery grouped control manner, the problems that the data volume is great and an electric charge state of each storage battery is difficult to reasonably determine when single control is adopted are solved. The energy management control method can be widely applied to the distributed photovoltaic energy storage system; and a control manner is simplified, the control efficiency is improved and the photovoltaic utilization rate and the power supply quality are improved, so that the energy management control method has very important application prospects.

The invention relates to a device for aligning the position of plate-shaped parts (12), comprising a continuous conveyor device (13) for conveying plate-shaped parts (12), an optical measuring device that is associated with the continuous conveyor device (13) and that is used to determine the actual position of at least one specific plate-shaped part (12) and that compares the determined actual position to a stored desired position and determines the difference in the position of the actual position in relation to the desired position, a control device (20) that is coupled to the optical measuring device (15) for controlling a positioning unit (19) in such a manner that at least one specific plate-shaped part (12), the difference in position in relation to the desired position being determined, can be received on the receiving area by the positioning unit (19) and can be deposited on a defined depositing area in a precise position corresponding to the desired position, for further transportation on the continuous conveyor device (13).

The invention relates to a mini-type test evaluation device for integral SCR denitration catalyst reaction performance test and an application method thereof, and belongs to the technical field of catalysis. A flow control instrument and a temperature control instrument control the temperature of a reaction gas sample introduction control device and a heating furnace of a preheating-reacting device; all component gases and water vapor passing through the reaction gas sample introduction control device are converged into a gas mixing device; simulated flue gas getting out of the gas mixing device enters a gas preheating pipe of the preheating-reacting device, the simulated glue gas getting out of the gas preheating pipe enters a catalyst filling pipe of the preheating-reacting device and passes through a catalyst bed layer; the gas passing through the inlet of the gas preheating pipe of the preheating-reacting device and the gas passing through the outlet of the catalyst filling pipe are led into a flue gas composition analyzing system through a sampler. The operation temperature of the device is high, and the measured activity of the catalyst is relatively low but closer to the real value; the barrier in the heat transmitting process and the thermal loss in the process are reduced, and energy saving is facilitated; the time for achieving balance of the device is shortened.

The invention provides a large scale production technology for a dental pulp stem cell. The large scale production technology comprises following steps of (1) separating and extracting the dental pulp stem cell; (2) amplifying the dental pulp stem cell through two dimension cultivation; (3) detecting the dental pulp stem cell; (4) cultivating the dental pulp stem cell on a large scale; (5) freeze preserving the dental pulp stem cell; and (6) freeze preserving the dental pulp stem cell for a long term. The invention provides an in vitro large-scale cultivating and amplifying method for a dental pulp stem cell, establishes a long-term, standard and systematized freeze preserving system for a high quality high activity dental pulp stem cell, so that the method can provide a high enough quality stem cell resource for clinic and scientific researches, and has low cost and a wide application prospect.

Provided is a control circuit for realizing S curve acceleration and deceleration of a motion control system. A CPU bus interface circuit writes the accelerated acceleration, the average speed, the initial speed, the termination speed and instruction displacement parameters into corresponding registers in an instruction parameter register and sends out the working state of the circuit in response to an external request; an initialization circuit reads instruction parameters in the instruction parameter register, calculates the total speed change and reasonably plans the speed change of each section; an accelerated acceleration integral circuit and an acceleration integral circuit execute integral operation and writes the integral operation into corresponding registers in an execution register; a drive pulse inter-pulse calculation circuit reads a speed register and calculates the inter-pulse count value of drive pulses; a pulse generating circuit uses the inter-pulse count value to count a reference clock so as to achieve the required drive pulses; a displacement control circuit counts the output drive pulses, calculates the output displacement and writes the output displacement into a displacement register; and a state transfer and control circuit causes the S curve acceleration and deceleration control circuit to act in an orderly and coordinated mode in response to the reference clock.

The invention discloses an alternating current-direct current micro-grid system on the basis of an electricity energy collector. The alternating current-direct current micro-grid system comprises a power distribution network, a power distribution transformer, a distributed power source, distributed energy storage and loads which are sequentially connected with one another. The electricity energy collector is arranged among the loads, the distributed power source, the distributed energy storage and the transformer and is connected with an alternating-current 400V bus on a low-voltage side of the power distribution transformer by a point of common coupling (PCC) of a micro-grid. The alternating current-direct current micro-grid system has the advantages that the flexible all-controllable electricity energy collector is based on power electronic technologies, the micro-grid system on the basis of the power energy collector has electricity energy collector unified management and grid connection functions, direct-current and alternating-current circuits can be constructed in a unified manner, the quality of electric energy can be controlled in a unified manner, plug-and-play access of the distributed power source can be facilitated, and the alternating current-direct current micro-grid system brings convenience for unified coordination management and efficiency improvement.

Music is blanket transmitted (for example, via satellite downlink transmission) to each customer's computer-based user station. Customers preselect from a list of available music in advance using an interactive screen selector, and pay only for music that they choose to have recorded for unlimited playback, for example, by a “CD burner”. An “ID tag” is woven into the recorded music so that any illegal copies therefrom may be traced to the purchase transaction.

The invention provides a scale production process of adipose-derived stem cells. The production process comprises the following steps: (1) separating and extracting adipose-derived stem cells; (2) culturing and amplifying the adipose-derived stem cells; (3) detecting the adipose-derived stem cells; (4) culturing the adipose-derived stem cells on a large scale; (5) refrigerating the adipose-derived stem cells for preserving; (6) preserving the adipose-derived stem cells for a long time in a refrigerating manner. An in-vitro scale culturing and amplifying method for adipose-derived stem cells is provided, and a long-term, standard and systemic refrigeration preserving system is established for high-quality and high-activity adipose-derived stem cells, so that sufficient high-quality adipose-derived stem cell resources are provided for clinical treatment and scientific research. The process is low in cost and wide in application prospect.

A method and apparatus is provided for reporting the impact on services in a network caused by node and network faults or outages. As a method, the operator of a specified network device is provided with notice of the impact of a network fault on one or more services running in association with the specified device. The method includes the steps of discovering one or more devices in the network that are respectively connected to the specified device, to assist in performing an intended task, and then discovering each service that is configured to run on each of the discovered devices, likewise in support of task performance. The method further comprises monitoring the status of respective discovered devices at prespecified intervals, in order to detect the occurrence of a fault in the network. Upon detecting a fault, an alert is generated, to indicate the impact of the detected fault on respective discovered services.

The invention relates to a method for detaching a charge (5) which is stuck to the inner wall of a grinding pipe (1), wherein the drive device (2) of the grinding pipe (1) is controlled by a control device (3) for targeted removal of the charge (5) that is stuck. The grinding pipe (1) is rotated in a targeted manner such that the charge (5) that is stuck is removed from the inner wall of the grinding pipe (1) as a result of multiple modification of the rotational speed of the grinding pipe (1) and, optionally, as a result of abrupt braking of the grinding pipe (1). Generally speaking, the material-dependent maximum angle of rotation F of the grinding pipe is not exceeded in order to avoid the charge that is stuck from falling in an uncontrolled manner. The invention supercedes labour-intensive and protracted methods for detaching such charges (5) since the tasks can be carried out by the same motor of the drive device (2) which is used to drive the grinding pipe (1) during the grinding process.

The invention discloses a cam rope drive robotic fishtail swing device with a shaft replacement door type mechanism. The device comprises the shaft replacement door type mechanism, a door frame A, a door frame B, a disc-shaped cam drive mechanism, springs and pull ropes. The door frame A is installed on one side of the shaft replacement door type mechanism and the door frame B is installed on the other side of the shaft replacement door type mechanism. The springs and the pull ropes are installed on the two sides of a first door. Under the condition that a direct-current motor drives a disc-shaped cam to rotate, the profile of a flange of the disc-shaped cam makes contact with a sliding block B sleeved with the corresponding pull rope, meanwhile, the profile of a base circle of the disc-shaped cam does not make contact with a sliding block A sleeved with the corresponding pull rope, and therefore the first door swings in a reciprocating manner under the effect of a sliding bearing. By the adoption of the device, the variable structure of the disc-shaped cam is combined with the springs and the pull ropes, so that rotary shaft movement of the shaft replacement door type mechanism is achieved. By the adoption of the device, a complex robotic fish fin control problem is converted into a structure and appearance design problem of the disc-shaped cam, so that the complexity of a robotic fish control system is effectively reduced.

The invention relates to a capability adjustable volution compressor refrigerating system with a jet apparatus arranged on a central loop, and belongs to the refrigerating and air-condition field. A central pressure loop is arranged between an exit of a condenser and an entrance of a compressor, the top of the loop is provided with a jet apparatus, the invention uses the jet apparatus to lead and shoot the refrigerating fluid discharged from the compressed central section toward the low pressure side by utilizing the pressure difference between the central pressure loop and the inhaling mouth of the compressor, thereby strengthening the discharging function of the system refrigeration fluid and elevating the unloading ability of the volution compressor. Simultaneously, the combination of the strengthened refrigerating fluid discharging technique and the refrigerating fluid ejecting technique greatly elevates the capability changing ability toward the two directions of big and small of the volution compressor refrigerating system. The technique can be used for the refrigeration/heating pump system in the air-condition refrigeration field containing the volution compressor, can effectively change the efficiency, system capability and capacity of the compressor, and make the system work with high efficiency in a much bigger working condition range, thereby elevate the applicability under the condition of the working condition changing in a bigger range of the system.

The disclosed actuator is applicable to relay, contactor, breaker, solenoid valve and electromagnet etc. Stable state is maintained through excitated actuation by pulse current, magnet, or snap spring, spring catch and spring etc. Thus, bi-directional pulse generating circuit, winding changing switch in prior art, or complicated bistable mechanism and spring of reverberatory force can be omitted, only one switch with unidirectional pulse being input is adopted so as to possess features of energy saving, antivibration, simple structure, easy of miniaturization, unease of wobble and long working travel. The actuator includes base, electromagnet and stable maintaining unit. Two stable places are located at two sides of action spot of largest magnetic attraction. Movable piece at one stable place can be changed to another stable place by pulse magnetic force of electric magnet.

The invention discloses a method for building a signal control model for an urban traffic network crossroad for solving the technical problem that the existing urban traffic network crossroad is complex in signal control. The technical proposal is that the signal control model of the urban traffic network crossroad is built through the relationship between discrete state equations of the crossroad and adjacent crossroads according to requirements of the traffic signal control so that correlation and restrictive relation of the whole urban traffic network model are fully embodied. The model is built according to the requirements of the signal control by using the method of the invention, traffic signal timing is carried out on a single crossroad or unified optimizing timing is carried out on the whole traffic network signal lamps according to optimization indexes so as to dynamically analyze the urban traffic network, thereby simplifying the problem of the urban traffic network crossroad signal control.

The invention discloses an ice storage refrigeration system and a refrigeration method thereof, which relate to the technical field of refrigeration air conditioners. The ice storage refrigeration system comprises a refrigeration unit, a tail end device, an ice making unit, a heat exchange device and an ice storage device, wherein an evaporator of the ice making unit, the ice storage device and acold fluid flow passage in the heat exchange device are connected by a pipeline loop; a hot fluid flow passage in the heat exchange device is connected with the loop of the tail end device via a pipeline; a loop between the condenser of the ice making unit and the evaporator of the refrigeration unit is provided with a pipeline; and the cooling water of the condenser of the ice making unit is supplied after being precooled to 2-20 DEG C by the refrigeration unit. According to the ice storage refrigeration system, the problems that the traditional refrigeration unit can not work under the ice making working condition and a refrigeration unit of double working conditions has big compression ratio, high cost and the like and is complex to control under the ice making working condition are solved, the cost of the refrigeration system can be lowered, and ice making efficiency and operation stability are improved.