1439 results about "Stabilization control" patented technology

The invention relates to a power grid on-line decision-stabilizing control system and a control method based on super real-time emulation. According to the power grid on-line decision-stabilizing control system, a data processing module is arranged in a dispatching center, is used for acquiring power grid state information, and transmits power grid operating data to an on-line decision-stabilizing system, the on-line decision-stabilizing system is arranged in the dispatching center and sends a stabilizing controlling decision and overall power grid information to a stabilizing controlling device, the stabilizing controlling device is locally mounted at a transformer substation or a power station, and a data conversion and communication port is connected between the on-line decision-stabilizing system and the stabilizing controlling device and inside the stabilizing controlling device, and is used for data communication between the on-line decision-stabilizing system and the stabilizing controlling device and inside the stabilizing controlling device. A power grid stabilizing decision and control are carried out in real time based on the super real-time emulation, a control decision matched with actual working conditions of a power grid is obtained, a prevention and control decision and an emergency control decision are carried out simultaneously in a system, stable control is carried out on the power grid, and the stability of the power grid is effectively improved.

An unbalance identification and vibration suppression control system for a magnetic suspension rotating machinery comprises an unbalance identification module, an unbalanced force compensation module, a magnetic bearing power amplifier, an electromagnet rotor and a displacement sensor. Based on stable control of a magnetic suspension rotor, the unbalance of a magnetic bearing is identified in an online manner by a novel wave trap based on coordinate transformation, on one hand, the identification amount is used for compensating common-frequency current stiffness force, on the other hand, proper common-frequency current stiffness force is generated according to the identification amount to compensate common-frequency displacement stiffness force, and the influence of the low-pass characteristic of the power amplifier on compensation precision of the common-frequency displacement stiffness force is eliminated by leading a simplified inverse model of the magnetic bearing power amplifier into a feed-forward channel. When the magnetic suspension rotor rotates at a high speed, common-frequency bearing force is greatly reduced, and unbalanced vibration of the magnetic suspension rotor is remarkably suppressed. The unbalance identification and vibration suppression control system is simple, convenient, easy and particularly suitable for an actual high-speed magnetic suspension rotor system.

The invention provides an automobile tire burst safety and stability control method used for manned and unmanned vehicles and based on vehicle braking, driving, steering and suspension systems and belongs to the field of automobile tire burst safety. According to the automobile tire burst safety and stability control method, tire burst judgment using a tire pressure detection mode, a state tire pressure mode and a steering mechanical state mode are established; an automobile tire burst safety and stability control mode, an automobile tire burst safety and stability control mode model, an automobile tire burst safety and stability control mode algorithm, a control structure and a control process are adopted; through tire burst control entering and exiting as well as normal and tire burst control mode conversion, vehicle braking, driving, steering, steering wheel rotation force and suspension balancing control are carried out in a coordinated manner to realize real or unreal tire burst process overlapped tire burst control; and under a condition that a tire burst process state and a tire burst wheel and vehicle motion state are suddenly changed, important technical barriers that thewheel and the vehicle are seriously unstable due to tire burst, the tire burst extreme state is hard to control and so on are broken through to solve the important long-term problem which troubles theautomobile tire burst safety at present.

A magnitude and direction of at least one of a reset current and a second stabilization current (that produces a reset field and a second stabilization field, respectively) is determined that, when applied to an array of magnetic sense elements, minimizes the total required stabilization field and reset field during the operation of the magnetic sensor and the measurement of the external field. Therefore, the low field sensor operates optimally (with the highest sensitivity and the lowest power consumption) around the fixed external field operating point. The fixed external field is created by other components in the sensor device housing (such as speaker magnets) which have a high but static field with respect to the low (earth's) magnetic field that describes orientation information.

The invention relates to a method of taking over and controlling attitude after a space tethered robot captures a flexible target satellite. Taking regard of nondeterminacy of inertia, the coupling effect, external interference and other factors, the method of taking over and controlling attitude after space tethered robot captures flexible target satellite establishes a complex attitude and orbit coupling kinetic equation, designs inner and outer ring terminal sliding mode controllers, and gives consideration on the saturation characteristics of a thruster and a tether so as to stably control the attitude and angular velocity of the complex. The method of taking over and controlling attitude after a space tethered robot captures a flexible target satellite includes the following steps: establishing an attitude kinetic equation of a complex after a space tethered robot captures a target satellite; designing inner and outer ring terminal sliding mode controllers and the corresponding adaptive law; taking the inner ring control law and the outer ring control law as the input of a control system to take over and control the attitude after the flexible target satellite is captured; and proving Lyapunov stability. The method of taking over and controlling attitude after a space tethered robot captures a flexible target satellite can solve the problem that the flexible complex parameters are not determined and the self-supplied thruster of the space tethered robot is saturated.

The invention relates to a soft sensing method for load parameters of a ball mill. The method is that a hardware supporting platform is used to obtain vibration signals, vibration sound signals and current signals of a ball mill cylinder to soft sense ball mill internal parameters (ratio of material to ball, pulp density and filling ratio) characterizing ball mill load. The method comprises the following steps that: the vibration, the vibration sound, the current data and the time-domain filtering of the ball mill cylinder are acquired, time frequency conversion is conducted to the vibration and the vibration sound data, kernel principal component analysis based nonlinear features of the sub band of the vibration and the vibration sound data in frequency domain are extracted, nonlinear features of the time domain current data are extracted, feature selection is conducted to the fused nonlinear feature data and a soft sensing model based on a least squares support vector machine is established. The soft sensing method of the invention has the advantages that the sensitivity is high, the sensed results are accurate, the practical value and the popularization prospect are very good, and the realization of the stability control, the optimization control, the energy saving and the consumption reduction of the grinding production process is facilitated.

Disclosed a high speed magnetic levitation flywheel stability control system, comprises a displacement sensor, a displacement signal interface circuit, a rotary speed detect circuit, a magnetic bearing controller, and a magnetic bearing power amplifying drive circuit. Wherein, the magnetic bearing controller comprises a axial magnetic bearing controller and a radial magnetic bearing controller, while the radial one is formed by decentralized PID control module and a cross feedback control module whose outputs are connected by the feedback method in cross and parallel. Said invention utilizes the cross feedback control formed by forward whirling motion filter and backward whirling motion filter based on the decentralized PID control; it reaches the phase lead compensation to the forward and backward whirling motion by using the difference of their frequency and whirling motion directions, their variation rule of rotary speed, and the signal of rotary speed of flywheel. So the breakdown speed of flywheel is improved while the stable operation of magnetic levitation flywheel in whole rising and falling process is confirmed too.

The invention relates to an active-disturbance-rejection trajectory linearization control method suitable for hypersonic velocity maneuvering flight. The active-disturbance-rejection trajectory linearization control method regards a part different from a nominal model as a general disturbance, establishes a hypersonic aircraft attitude and angular velocity dynamic model with multi-source complex uncertainty and strict feedback form, designs attitude ring and angular velocity ring model auxiliary expansion state observers, adopts a non-linear tracking differentiator to arrange a transition process for a given guidance command and generate a nominal command of an attitude ring, designs an active-disturbance-rejection trajectory linearization attitude ring controller containing a feedforward tracking control law, a feedback stabilization control and a disturbance compensation term, and designs an active-disturbance-rejection trajectory linearization angular velocity ring controller containing a feedforward tracking control law, a feedback stabilization control and a disturbance compensation term. The active-disturbance-rejection trajectory linearization control method achieves high-precision anti-disturbance control under the given conditions of large-margin guidance command and control constraint, and has high adaptability for multi-source disturbance large-scale perturbation in hypersonic velocity long-span maneuvering flight.

The invention belongs to the servo control technique of an airborne optoelectronic pod, particularly relates to a platform stabilizing technique and a high-precision optoelectronic tracking control technique of a two-axis four-frame optoelectronic pod, and provides a servo control method and system of the two-axis four-frame optoelectronic pod. The inner-outer frame linkage platform stabilization control technique is designed firstly to enable the pod to have good platform stability, the platform stabilization control technique can guarantee that an inner direction frame and an inner pitching frame to be perpendicular to each other constantly, geometry restraining coupling of the pot frames is reduced, and the optoelectronic pod is enabled to have good platform stability during zenith pass; on the basis, the inner-outer frame linkage optoelectronic tracking control technique is designed as well, and finally high-precision and high-stability optoelectronic tracking control of the optoelectronic pod is realized. The method and system serving as the key servo control technique applicable to the two-axis four-frame optoelectronic pod has good application prospect and brings high economic benefits and military benefits.

The invention discloses an optimization method for safety and stability control measures of a multi-direct-current power system. The optimization method comprises the steps of determining the grid scale, operation method, direct-current supply power and transmitting and receiving end situations of a target power system; conducting stability analysis to the target power system, and determining whether the safety and stability control measures are required to be taken to the grid or not after a direct-current line is determined to be faulted; if so, selecting a direct-current group for coordination control; determining the promoting power and promoting speed of the direct-current group; recalculating the generation shedding and shedding load of a direct-current fault, wherein standby control measures can be additionally taken to the generation shedding and shedding load after direct-current power is failed to be promoted; and determining the implementation scheme of the safety and stability control measures. After the safety and stability control measures of the multi-direct-current power system are coordinately optimized by adopting the optimization method, the direct-current adjustable capacity of the system can be effectively utilized, the stability of the system after the fault occurs is improved, the number of the safety and stability control measures for generation shedding, shedding load and the like is reduced, and the impacts caused by the direct-current fault to power operation, industrial production and the living of people are reduced.

The invention relates to the new-energy distributed power generation operation control and aims at providing a wind-energy/ solar-energy/ storage/ ocean-current-energy new-energy isolated network stabilization operation integration control system and a method thereof. In the system, an energy storage apparatus and a new energy generator set are merged into an alternative current (ac) bus power grid through grid-connected convertors which are respectively configured in the energy storage apparatus and the new energy generator set. The each generator set and the energy storage apparatus are configured with monitoring apparatuses which is equipped with CAN interfaces and Ethernet network interfaces. The each monitoring apparatus is connected with the grid-connected convertor corresponding to the monitoring apparatus through a CAN bus. Simultaneously, information interaction can be realized through connection of the Ethernet and a central integration control unit. In the invention, a real-time Ethernet field bus technology is used to change new-energy isolated power generation into distributed concentrated scheduled orderly power generation. A stabilization control problem of clearance-type power supply can be partially solved. A computer network control technology, an intelligent scheduling control technology, a real time synchronization communication technology and a modern high-efficient grid-connected converting technology are combined. The system possesses flexible control, good stability, good redundancy and the like.

The invention discloses a robot single-leg assembly control development performance test platform and method. The platform comprises a gantry three-coordinate mechanical arm assembly, a robot leg connection bracket, a Stewart platform, a six-dimensional force sensor, a robot single-leg assembly and a five-dimensional force measurement platform, wherein a servo controller and a displacement sensor are integrated in the Stewart platform; the Stewart platform is invertedly arranged on a base of the robot leg bracket; the five-dimensional force measurement platform is arranged at the center of the ground below the robot single-leg assembly; and the robot leg connection bracket is fixed on a Z-axis-direction mobile supporting frame assembly of the gantry three-coordinate mechanical arm assembly. The test platform is suitable for single-leg movement and quick gait control during bionic gait generation of a four-foot or multi-foot hydraulic driving robot as well as development and research on multiple control strategies for robot load distribution, control force distribution, single-leg force feedback control and 'discrete gait and continuous force control' attitude stabilization control.

The invention relates to a safety and stability control system modeling method in power system dynamic simulation. The method comprises the following steps of: performing hierarchical modeling on the safety and stability control system in a hierarchical decomposition mode; simulating an operation mode, fault information and a control strategy by adopting a ladder logic diagram to obtain a main station model and a sub-station model; and connecting a safety and stability control system model and a primary system model to realize the close-loop dynamic simulation of a large-scale power system which contains the safety and stability control system model. By the method, various different action behaviors and control characteristics of the safety and stability control system in the large-scale power system can be simulated accurately; the defects that conventional simulation software cannot reflect the action behaviors of the safety and stability control system are overcome; postmortem analysis of complex and severe accidents can be performed; and the requirements of the large-scale power system dynamic simulation on the simulation of the safety and stability control system can be met.

The invention relates to a recirculating-ball electric power-assisted steering system with variable transmission ratio for a bus, belonging to the field of steering systems for buses. The system sequentially comprises a steering wheel, a steering column, a torque transducer, a power-assisted motor, a first retarding mechanism connected with the power-assisted motor, a recirculating-ball steering gear, a steering rocker shaft arm, a steering tie rod and a steering system control ECU, wherein a second retarding mechanism and a corner motor driving the second retarding mechanism are arranged between the torque transducer and the recirculating-ball steering gear. The corner motor control integrates the ideal transmission ratio control with the stability control for carrying additional corner control, thereby changing the transmission ratio from a steering wheel corner to a front wheel corner, and increasing the function of the steering wheel in the stability control; meanwhile, steering counter torque complementation control caused by the additional corner is integrated into the power-assisted control of the power-assisted motor, thereby realizing the coordination control and the matching of the corner motor and the power-assisted motor and ensuring that a driver obtains better steering handfeel.

In an electric vehicle having a plurality of MG units each including an AC motor and an inverter, a control apparatus executes system voltage stabilization control to suppress variations in a system voltage by adjusting an input power of a first MG unit or a second MG unit so as to reduce the difference between a target value and detected value of the system voltage. In execution of this control, either one or both of the MG units is selected by a selector by using information on the first MG unit and the second MG unit. The system voltage stabilization control is executed on the selected MG unit. Alternatively, the control apparatus may execute the system voltage stabilization control by selecting a voltage boosting converter.

The invention discloses a rigid spacecraft performer multi-fault diagnosis and fault tolerance control method. According to the method, the kinetic and dynamic model of a rigid spacecraft attitude control system is put forward, a fault model for existing of both the performance failure fault and the deviation fault of a rigid spacecraft is established, and then a fault detection observer adopting the adaptive threshold technology and a fault estimation observer based on the adaptive technology are respectively established so that online real-time detection and estimation of the fault time and the concrete situation of the fault can be realized, and finally a backstepping sliding mode fault tolerance controller is designed according to fault information established by the fault estimation observer. Attitude stabilization control of the rigid spacecraft under the condition of the performer efficiency damage and the deviation fault can be realized, and the influence of external disturbance on the system and the observers can also be considered in the design process. Besides, the fault detection observer and the fault estimation observer can be independently designed so that the engineering application can be more easily implemented.

The invention provides a control method and a control system for stability of an electric four-wheel drive vehicle. The method comprises the following steps: determining the current working condition of the electric four-wheel drive vehicle; detecting operating parameters of the electric four-wheel drive vehicle; and controlling four drive motors of the electric four-wheel drive vehicle according to the current working condition and the operating parameters. According to the control method and the control system for the stability of the electric four-wheel drive vehicle, torque adjustment is respectively performed on the four motors through the current working condition and the operating parameters, and therefore, the stability of the vehicle is effectively improved, and the safety performance of the vehicle is promoted.

A control apparatus for a vehicle's driving device including (A) a non-step speed change portion including (a1) a differential device that distributes an output of an engine to a first electric motor and a transmission member, and (a2) a second electric motor provided in a power transmission path from the transmission member to drive wheels, and (B) an automatic speed change portion constituting a portion of the power transmission path, the control apparatus including a vehicle behavior stabilization controller for stabilizing a behavior of the vehicle when the behavior of the vehicle is unstable; a coupling device which is selectively switchable to (a) a released state thereof in which the coupling device places the non-step speed change portion in a non-step speed change state thereof in which the non-step speed change portion is operable as an electric CVT (continuously variable transmission), and (b) an engaged state thereof in which the coupling device places the non-step speed change portion in a stepwise speed change state thereof in which the non-step speed change portion is not operable as the electric CVT; and a vehicle-stabilization-related switching controller which switches, when the vehicle behavior stabilization controller performs a vehicle behavior stabilization control, the coupling device to the released state thereof.

An image processing apparatus comprises: an input unit configured to input an image signal obtained by photoelectrically converting, by an image sensor, an optical image incident via an optical system including optical image stabilization unit; an acquisition unit configured to acquire optical image stabilization control information obtained by the optical image stabilization unit; and a motion of camera prediction unit configured to predict a motion of camera based on information obtained by eliminating influence of optical image stabilization by the optical image stabilization unit from the image signal input from the input unit based on the optical image stabilization control information.