178 results about "Inverse control" patented technology

An irradiation apparatus for irradiating by scanning a target volume according to a predetermined dose profile with a scanning beam of charged particles forming an irradiation spot on said target volume, said apparatus comprising:a beam generating device,a reference generator for computing, from said predetermined dose profile, through a dynamic inverse control strategy, the time evolution of commanded variables, these variables being the beam current I(t), the spot position settings x(t),y(t) and the scanning speed settings vx(t), vy(t),a monitor device having means for detecting at each time (t), the actual spot position as a measured position defined by the values xm(t),ym(t) on the target volume,characterised in that said irradiation apparatus further comprises means for determining the differences ex(t), ey(t) between the measured values xm(t), ym(t) and the spot position settings x(t) and y(t), and means for applying a correction to the scanning speed settings vx(t) and vy(t) depending on said differences ex(t), ey(t). The present invention is also related to a monitor for determining beam position in real-time.

The invention discloses a hierarchical dynamic inverse control method for a flight vehicle based on a sliding mode interference observer. The hierarchical dynamic inverse control method comprises the steps of: 1, by considering multi-source interference suffered by the flight vehicle, building a multi-source interference system model based on an flight vehicle longitudinal dynamics model; 2, designing a sliding mode interference observer and estimating multi-source interference based on the multi-source interference system model built in the first step; the third step, constructing a hierarchical dynamic inverse composite controller based on the sliding mode interference observer in the second step, thus enabling speed and height of the flight vehicle to highly follow a reference instruction while compensating multi-source interference. The hierarchical dynamic inverse control method for the flight vehicle based on the sliding mode interference observer has the advantages of strong anti-interference capability, fast tracking speed, high control precision and the like, thus being applicable to tracking and controlling height and speed of the flight vehicle.

The utility model discloses a vibration control apparatus based on self adaptive inverse control and the corresponding vibration control method which increases the control speed of the controller and realizes multi-point vibration control and waveform reproduction. The vibration control apparatus comprises a display and control unit, a calculation processing unit, a data acquisition unit, a vibration signal generating unit and a control object connected with the output signal of the vibration signal generating unit, wherein the calculation processing unit takes the DSP processor as the kernel and is in bidirectional signal connection with a field programmable gate array FPGA. The output of the control object is connected with the input of the data acquisition unit. The calculation processing unit comprises two self-adaptive filters for establishing and modifying the vibration signal respectively. The positive model P(Z) and the inverse model C(Z) of the control object are constructed off-line by utilizing the AP-NLMDF-CD algorithm through the two self-adaptive filters and then are modified on-line with the minimum iterative error as the evaluation criterion to make the output of the control object to approach to the referenced time domain input signal continuously.

This invention discloses a method for synchronizing clocks in a packet exchange network including: the NE of a sending end sends data messages at a rate in terms of the necessary transmitted clocks and the NE of the receiving end receives data messages in terms of the rate to resume the local clock based on the frequency for receiving said data messages. This invention discloses a device for realizing clock synchronization in a packet exchange network composed of an operation module, an inverse control module and a frequency generation module connected orderly, in which, the operation module is connected with the FIFO used in sending and receiving and storing the packet exchange network data messages, besides, the device can be composed of a clock resuming module, a phase discriminating module and a frequency generating module.

The invention relates to a self-adaptive inverse control method of a piezoelectric driver. The method includes the following steps: establishing a non-linear mathematic model of output displacements and input voltages of a piezoelectric driver off-line according to a hysteretic non-linear relationship of the piezoelectric driver; according to the established non-linear mathematic model, calculating an inverse model of the piezoelectric driver and taking the inverse model as an initial inverse controller to drive the piezoelectric driver; calculating actual output displacements and input voltages of the piezoelectric driver when the piezoelectric driver is running on-line; identifying model parameters on-line through a self-adaptive algorithm, and obtaining a model during on-line running of the driver and calculating the inverse model of the driver; and according to the calculated parameters of the inverse model, replacing original parameters in a controller of the piezoelectric driver and updating the parameters on-line. The influence of parameter uncertainty of the model, unknown interference and other reasons is effectively overcome. Compared with a pure inverse model, the inverse model of the invention has the advantages that the control precision is greatly increased, and the inverse model is suitable for piezoelectric drivers with different models and different specifications.

The invention provides a compensation circuit of a liquid crystal display panel, comprising a plurality of source scanning lines, a plurality of grid scanning lines, a plurality of inverse grid scanning lines, a plurality of pixel units and a plurality of compensation units. Each of the source scanning lines is used for outputting a data voltage, each of the grid scanning lines is used for outputting a control signal, and each of the inverse grid scanning lines is used for outputting an inverse control signal; a pixel unit of the plurality of pixel units is discharged to a corresponding gray scale voltage according to the corresponding control signal and the corresponding data voltage, and a corresponding compensation unit is used for supplying a compensation voltage to compensate the voltage of the corresponding the gray scale according to the inverse control signal.

The invention provides a power transformer noise control method based on an inverse control technology. The power transformer noise control method based on the inverse control technology comprises the steps that noise signals generated by a noise source of a power transformer are collected through a primary sensor and are regarded as reference signals of a control system; error signals generated through the superposition of noise reduction signals and the noise signals are collected through an error sensor; the control system establishes a secondary sound channel model for a secondary sound channel through an adaptive modeler according to the error signals, simulates the process that the noise reduction signals generated by a secondary noise reduction source are transmitted in space and obtains sound signals of a simulation secondary sound source; the control system carries out inverse modeling on the secondary sound channel through the adaptive modeler according to the error signals, and the secondary sound channel is connected with the secondary sound channel model in series in the control system; the sound signals equal to the reference signals in amplitude are obtained through calculation, and inverting processing is carried out on the sound signals to obtain control signals controlling the secondary noise reduction source; the noise reduction signals are output according to the control signals. The power transformer noise control method based on the inverse control technology can effectively control low-frequency noise of power transformers.

A display apparatus includes a display panel, a data driving part, and a timing control part. The display panel includes gate lines extending in a first direction, data lines extending in a second direction crossing the first direction, and first and second pixel groups. The first and second pixel groups are disposed at opposing sides of a data line and are alternately connected to the data line. The data driving part includes channels connected to the data lines. The channels output a data signal to the data lines, the data signal has a first polarity or a second polarity, and the second polarity has an inversed phase to the first polarity. The timing control part outputs a data inverse control signal and first and second polarity control signal, which control the polarity of the data signal based on the data inverse control signal.