31 results about "Delay dependent" patented technology

A change point detection circuit (16) extracts a clock signal (S3) from an input data, i.e. a serial data (S1). A variable delay circuit (40) imparts a delay dependent on a delay control signal (S8a)to a reference signal (S4) having a predetermined frequency, and shifts the phase of the reference signal (S4) with reference to an initial delay. An input latch circuit (14) latches internal serial data (S2) using the output signal from the variable delay circuit (40) as a strobe signal (S5). A phase comparator (22) matches the frequencies of the clock signal (S3) and the strobe signal (S5) and generates phase difference data (S9) dependent on the phase difference of two signals. A loop filter (30) integrates the phase difference data (S9) generated by the comparator (22) and outputs the delay control signal (S8a). A phase shift amount acquisition section (50) acquires the amount of phase shift with reference to the initial delay imparted to the reference signal by the variable delay circuit (40) based on the delay control signal (S8a).

The invention belongs to the technical field of power systems and relates to an improved discrimination method of Lyapunov robust stability of a power system containing uncertain delay links, which ischaracterized by solving the Lyapunov functional of a delay system based on the Krasovskii theory, then expressing the derived function of a system trajectory from the functional by a group of linearmatrix inequalities (LMI), reducing the conservation of the criterion by introducing a few necessary loose terms in the process of deducing functional derivatives and then transforming the disturbance terms containing uncertainties by utilizing the Schur complement, thereby obtaining the stability criterion. The method of the invention has the advantages of less conservation and high operation efficiency.

The invention discloses a method for measuring delay of a direct sequence spread spectrum binary phase shift keying modulator. Data despreading and demodulation and delay dependence are taken as cores, the delay measurement of input / output signals with different frequencies and different waveforms of the direct sequence spread spectrum binary phase shift keying modulator is converted into the delay measurement of signals with the same frequency and the same waveform, and is implemented by a created system. Digital signals are divided into two paths by a baseband signal generator (1) through apower divider (2), one path of digital signals pass through a direct sequence spread spectrum binary phase shift keying modulator (3) to be tested and enter a high-speed data acquisition unit (4), and the other path of digital signals are directly output by the power divider (2) to the high-speed data acquisition unit (4). A demodulation module (5) and a dispreading module (6) respectively perform demodulation and despreading processing on the acquired signals, and a delay-dependent module (7) calculates the delay of the two paths of signals. The method ensures that additional delay caused byhardware is not introduced in the measuring process, and can ensure the delay measuring accuracy less than 500ps when the sampling rate is 4GSa / s.

The invention relates to a delay-dependent robust constraint predictive control method for an uncertain system with unknown disturbances. The method comprises the following steps: 1, establishing a state space model with an uncertain time-delay system; 2, transforming a constructed model into an expanded time-delay uncertain state space model; 3, designing a controller based on the above expandedmodel; and 4, solving the controller gain by using linear matrix inequality. The method has the advantages that the controller is designed by using the expanded time-delay uncertain state space modelso as to adjust the system state and output errors independently under the condition that a time lag exists, thereby providing more freedom of adjustment; the controller gain of the system is solved by using a new, less conservative and relatively simple expanded model based on a LMI-form delay-dependent stability condition so as to reduce the controller's conservativeness; the H-infinity performance index is introduced into the controller design to overcome any bounded interference and reduce control cost.

The invention relates to an integrated temperature sensor (1) comprising: means (2000) for generating a pulse train (DATA_IN) at an oscillation frequency, means (3000) for counting the number of pulses during a fixed period of time independent of a temperature to be measured (T) and for generating a plurality of bits (b11, b10, . . . , b0) indicating the number of pulses in the pulse train (DATA_IN), and means (4000) for generating a serial digital signal (DATA_OUT) from said bits (b11, b10, . . . , b0), in which the means (2000) for generating a pulse train (DATA_IN) include a plurality of logic gates (2410, 2420, 2430, 2440, 2450) which can introduce a delay dependent on the temperature to be measured (T), said means (2000) generating a pulse train (DATA_IN) the oscillation frequency of which is dependent on said temperature to be measured (T). The invention also relates to a temperature measurement method and to a transponder for a wireless system.

The invention relates to a flexible spacecraft multi-domain dependent robust fault-tolerant control method based on input time-varying delay, comprising the following steps: first, taking flexible vibration as external disturbance, and establishing a flexible spacecraft state space model containing external disturbance and input delay through deduction by use of a Lagrange method; then, establishing a fault model, integrating the fault model into a flexible spacecraft state model needing fault tolerance, and converting an actuator partial failure fault-tolerant control problem into an uncertain parameter robust control problem according to the fault model; and finally, designing a state feedback passive fault-tolerant controller based on a linear matrix inequality approach by combining delay-dependent Liapunov functional and uncertain parameter robust H-infinity control. The method has the advantages of simple design and easy implementation, is applicable to fault-tolerant control under the condition that a flexible spacecraft has both input delay and actuator partial failure in the field of aerospace, and can keep a system asymptotically stable and suppress external interference.

The invention discloses a control method for developing time delay and derivative dependency thereof through a linear memoryless state feedback control law for uncertain neutral systems with time-varying delay, incentive restraint and norm-bounded parameters to ensure local stabilization of a closed ring system in a predetermined attraction domain in an initial state, provides an LMI optimization method to design state feedback gain to make an estimation value in the attraction domain maximum, solves an attraction domain estimation value with less conservative property based on a Lyapunov-Krasovskii function method, and provides solution conditions and solution strategies for the deigns in an LMI form.

The invention belongs to the technical field of power systems and relates to an improved discrimination method of Lyapunov robust stability of a power system containing uncertain double-delay links, which is characterized by solving the Lyapunov functional of a double-delay system based on the Krasovskii theory, then expressing the derived function of a system trajectory from the functional by a group of linear matrix inequalities (LMI), reducing the conservation of the criterion by introducing a few necessary loose terms in the process of deducing functional derivatives and then transformingthe disturbance terms containing uncertainties by utilizing the Schur complement, thereby obtaining the stability criterion. The method of the invention has the advantages of less conservation and high operation efficiency.

The invention relates to an integrated temperature sensor (1) comprising: means (2000) for generating a pulse train (DATA_IN) at an oscillation frequency, means (3000) for counting the number of pulses during a fixed period of time independent of a temperature to be measured (T) and for generating a plurality of bits (b11, b10, . . . , b0) indicating the number of pulses in the pulse train (DATA_IN), and means (4000) for generating a serial digital signal (DATA_OUT) from said bits (b11, b10, . . . , b0), in which the means (2000) for generating a pulse train (DATA_IN) include a plurality of logic gates (2410, 2420, 2430, 2440, 2450) which can introduce a delay dependent on the temperature to be measured (T), said means (2000) generating a pulse train (DATA_IN) the oscillation frequency of which is dependent on said temperature to be measured (T). The invention also relates to a temperature measurement method and to a transponder for a wireless system.

The invention discloses a delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation. The method comprises the steps that (1) a space-time code set is extracted to acquire a characteristic quantity set; (2) a parallel matrix and characteristic quantity function value vector quantities are calculated; (3) characteristic quantities are pre-estimated according to the characteristic quantity function value vector quantities to acquire a new space-time code set and a noise power estimation value; (4) the parallel matrix is whitened to acquire a solution correlation matrix; (5) the time-delay correlation norm of the solution correlation matrix is calculated; (6) a time-delay correlation matrix of code patterns in the new space-time code set is calculated; (7) time-delay relevance vector quantities are calculated according to parameters in the fifth step and the sixth step; (8) a code pattern corresponding to an element with the minimum value in the time-delay relevance vector quantities is chosen as a judgment code pattern. The delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation overcomes the defect that the complexity of a system in the prior art is high due to the large calculation, widens the identification range of an existing space-time code blind identification method, and can be used for a space-time code pattern used at a blind identification sending end.

A data placement and migration method for mixed deployment scenarios of heterogeneous memory and multi-type applications is composed of an application static analysis method, a data static placement method and a runtime dynamic migration mechanism. The method is applicable to heterogeneous memory systems consisting of high bandwidth memory and double rate memory and mixed deployment scenarios of asingle delay-dependent application and multiple batch applications, from two angles of static data placement tool and dynamic migration runtime system, the application is divided into logical data object sets by using the dependencies between data objects. Based on the different characteristics of the two memories, different data placement strategies are developed for different types of logical data objects, and dynamic monitoring and real-time migration are carried out during the running process of the application, so as to make full use of various memory resources of heterogeneous memory systems and meet the performance requirements of delay-dependent applications and batch applications respectively.

A data distribution management device (10) is provided on a transmission route between a transmission device (C1) that requires a delivery acknowledgement corresponding to data transmitted and a receiving device (C2) in which a transmission delay in a circuit (2) is smaller than a transmission delay in a circuit (3), and comprises a transfer unit that transfers the data from the transmission device (C1) to the receiving device (C2), a returning unit that prepares a delivery acknowledgement corresponding to the data transferred and send the delivery acknowledgement to the transmission device. The data distribution management device (10) also comprises a SG distribution control section (16) that decides whether the data transmitted by the transmission device (C1) is a protocol dependent on transmission delays and that orchestrates the returning unit to prepare a delivery acknowledgement and send the delivery acknowledgement when it is decided that the data is the delay dependent protocol.

A connection verification system that provides substantially non-intrusive connection verification for an optical switch, achieved by correlating the low-frequency contents of the input and switched signals. The results of the correlation process are compared against a connection map to determine whether the switch has operated correctly and to identify, if possible, which mis-connections have taken place. The system includes a selection unit for controllably admitting individual ones of the input signals and individual ones of the switched signals and a verification unit connected to the selection unit, for controlling operation of the selection unit as a function of a connection map and performing relative-delay-dependent signal processing operations on the signals admitted by the selection unit so as to identify connections established through the switching unit and determine their consistency with the connection map. The relative-delay-dependent signal processing operations may be based on correlation or anti-correlation, depending on the operational requirements of the invention.

The invention discloses a delayed power system stability analysis method based on low-order EIGD (Explicitly Infinitesimal Generator Discretization). The method comprises the steps of establishing a delayed power system model for a power system, and linearizing the delayed power system model, that is, expressing the delayed power system model through a delayed differential equation; re-ranking state variables of the delayed power system in the delayed differential equation, and dividing the state variables into delay-independent state variables and delay-dependent state variables; transformingthe delayed differential equation into an ordinary differential equation by use of an infinitesimal generator, thereby equivalently transforming a characteristic equation of the delayed power systeminto an ordinary characteristic equation, and further transforming calculation for characteristic values of the delayed power system into calculation for characteristic values of the infinitesimal generator. According to the delayed power system stability analysis method based on the low-order EIGD, through re-ranking of the state variable of the system, discretization of the delay-independent state variables is removed, the number of dimensions of a discretization matrix is reduced, and therefore, the calculated amount for calculation of key characteristic values of a DCPPS (Delayed Cyber-Physical Power System) is reduced.

The invention relates to a method and an apparatus for controlling the reproduction of audio contents by two loudspeakers. The broadcasting of audio contents by two loudspeakers is controlled by delivering a first audio content to the two loudspeakers and a further processing in which an auxiliary audio content is received. A second audio content is formed by temporally delaying the auxiliary audio content with a delay dependent on the spacing between the loudspeakers and on a distance between a first loudspeaker and a spot located in front of this first loudspeaker. The second audio content is delivered to the first loudspeaker. A third audio content is formed by inverting the auxiliary audio content. The third audio content is then delivered to the second loudspeaker.

The present invention discloses a stability determination method of an uncertain network multiple time delay system. The method comprises: establishing a closed-loop network multiple time delay control system model, mapping the uncertainty of the closed-loop network multiple time delay control system to a convex polyhedron parameter space, and obtaining a convex polyhedron uncertain network multiple time delay control system model; performing determination to obtain the delay-dependent robust stability of the convex polyhedron uncertain network multiple time delay control system through a liberty matrix method on the basis of a construction Lyapunov function, and obtaining the sufficient condition of the delay-dependent robust stability. The stability determination method of an uncertain network multiple time delay system avoids that the same Lyapunov function is used for all the convex polyhedron vertexes in an uncertain space, and reduces the conservative property of the robust stability sufficient condition.

The invention discloses a delayed power system feature value analysis method based on a low-order iterative infinitesimal generator discretization (IIGD) algorithm. A linear mathematical model of a delayed power system is built, and a differential equation of the delayed power system is obtained; state variables of the system are divided into delay-independent items and delay-dependent items according to a differential equation of the delayed power system; an infinitesimal generator is subjected to pseudo-spectral discretization, multiple discrete points are taken in the delay interval, a discrete function space is established, only the delay-dependent part is discretized on the discrete function space on the basis of a recombined mathematical model of the delayed system to generate a low-order infinitesimal generator discretized matrix; delayed power system feature values are obtained by adopting a sparse feature value algorithm; and for the obtained delayed power system feature values, the calculated feature values are verified with a Newton method, and if the convergence condition is met, precise feature values and feature vectors of the delayed power system can be obtained.

The present invention discloses a partial delay dependent disordering controller and an establishment method thereof. The partial delay dependent disordering controller includes a controller on the basis of a new operation mode (NOMs) and a controller on the basis of a non-fragile method. The controller on the basis of the new operation mode (NOMs) has an expression as follows: u(k)=K1-bar(r<k>)x(k)+K2-bar(r<k>)x(k-d), wherein, K1-bar(r<k>) is a controller grain, K2-bar(r<k>) is a system state, and the time delay d>=0. The controller on the basis of the non-fragile method has an expression as follows: u(k)=(K1-bar(r<k>)+DeltaK1-bar(r<k>))x(k)+(K2-bar(r<k>)+DeltaK2-bar(r<k>))x(k-d), wherein, K1-bar(r<k>) is a controller grain, x(k) is a system state, time delay d>=0, and DeltaK1-bar(r<k>) and DeltaK2-bar(r<k>) are controller grain disturbances.

The invention discloses a method for determining the delay-dependent stability of a new energy power system. The method is based on a Wirtinger inequality and a Markov model, and is used for analyzingthe maximum delay-dependent stability margin that the power system can withstand. The method comprises firstly, establishing delay-dependent new energy power system model based on the Markov model, and forming the system model into a discrete Markov jump linear system model; then, constructing a Lyapunov functional for the established model, and in the derivation process of the functional, scaling down the Wirtinger inequality to reduce the conservation of an criterion; finally, representing a resulting criterion by a set of linear matrix inequalities (LMI). The method of the invention improves the safety and stability of the grid operation.

The invention discloses a Wirtinger inequality-based power system delay-dependent robust stability judgment method. According to the method, uncertain parameters existing in the modeling process of apower system are considered. The method is used for analyzing maximum delay stability margin that the power system can withstand. The method specifically includes the following steps that: S1, a multi-delay power system model considering uncertain parameters is established; and S2, whether given delay hi satisfies a stability judgment condition is judged, if the given delay hi satisfies the stability judgment condition, it is judged that the delay power system is asymptotically stable under the delay hi condition. The method of the invention is wide in application range and less conservative.

The invention belongs to the technical field of power systems and relates to an improved discrimination method of Lyapunov robust stability of a power system containing uncertain delay links, which is characterized by solving the Lyapunov functional of a delay system based on the Krasovskii theory, then expressing the derived function of a system trajectory from the functional by a group of linear matrix inequalities (LMI), reducing the conservation of the criterion by introducing a few necessary loose terms in the process of deducing functional derivatives and then transforming the disturbance terms containing uncertainties by utilizing the Schur complement, thereby obtaining the stability criterion. The method of the invention has the advantages of less conservation and high operation efficiency.

The invention relates to a flexible spacecraft multi-domain dependent robust fault-tolerant control method based on input time-varying delay, comprising the following steps: first, taking flexible vibration as external disturbance, and establishing a flexible spacecraft state space model containing external disturbance and input delay through deduction by use of a Lagrange method; then, establishing a fault model, integrating the fault model into a flexible spacecraft state model needing fault tolerance, and converting an actuator partial failure fault-tolerant control problem into an uncertain parameter robust control problem according to the fault model; and finally, designing a state feedback passive fault-tolerant controller based on a linear matrix inequality approach by combining delay-dependent Liapunov functional and uncertain parameter robust H-infinity control. The method has the advantages of simple design and easy implementation, is applicable to fault-tolerant control under the condition that a flexible spacecraft has both input delay and actuator partial failure in the field of aerospace, and can keep a system asymptotically stable and suppress external interference.

The invention discloses a delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation. The method comprises the steps that (1) a space-time code set is extracted to acquire a characteristic quantity set; (2) a parallel matrix and characteristic quantity function value vector quantities are calculated; (3) characteristic quantities are pre-estimated according to the characteristic quantity function value vector quantities to acquire a new space-time code set and a noise power estimation value; (4) the parallel matrix is whitened to acquire a solution correlation matrix; (5) the time-delay correlation norm of the solution correlation matrix is calculated; (6) a time-delay correlation matrix of code patterns in the new space-time code set is calculated; (7) time-delay relevance vector quantities are calculated according to parameters in the fifth step and the sixth step; (8) a code pattern corresponding to an element with the minimum value in the time-delay relevance vector quantities is chosen as a judgment code pattern. The delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation overcomes the defect that the complexity of a system in the prior art is high due to the large calculation, widens the identification range of an existing space-time code blind identification method, and can be used for a space-time code pattern used at a blind identification sending end.

The invention relates to a delay-dependent robust constraint predictive control method for an uncertain system with unknown disturbances. The method comprises the following steps: 1, establishing a state space model with an uncertain time-delay system; 2, transforming a constructed model into an expanded time-delay uncertain state space model; 3, designing a controller based on the above expandedmodel; and 4, solving the controller gain by using linear matrix inequality. The method has the advantages that the controller is designed by using the expanded time-delay uncertain state space modelso as to adjust the system state and output errors independently under the condition that a time lag exists, thereby providing more freedom of adjustment; the controller gain of the system is solved by using a new, less conservative and relatively simple expanded model based on a LMI-form delay-dependent stability condition so as to reduce the controller's conservativeness; the H-infinity performance index is introduced into the controller design to overcome any bounded interference and reduce control cost.

The invention belongs to the technical field of power systems and relates to an improved discrimination method of Lyapunov robust stability of a power system containing uncertain double-delay links, which is characterized by solving the Lyapunov functional of a double-delay system based on the Krasovskii theory, then expressing the derived function of a system trajectory from the functional by a group of linear matrix inequalities (LMI), reducing the conservation of the criterion by introducing a few necessary loose terms in the process of deducing functional derivatives and then transformingthe disturbance terms containing uncertainties by utilizing the Schur complement, thereby obtaining the stability criterion. The method of the invention has the advantages of less conservation and high operation efficiency.

The present invention discloses a partial delay dependent disordering controller and an establishment method thereof. The partial delay dependent disordering controller includes a controller on the basis of a new operation mode (NOMs) and a controller on the basis of a non-fragile method. The controller on the basis of the new operation mode (NOMs) has an expression as follows: u(k)=K1-bar(r<k>)x(k)+K2-bar(r<k>)x(k-d), wherein, K1-bar(r<k>) is a controller grain, K2-bar(r<k>) is a system state, and the time delay d>=0. The controller on the basis of the non-fragile method has an expression as follows: u(k)=(K1-bar(r<k>)+DeltaK1-bar(r<k>))x(k)+(K2-bar(r<k>)+DeltaK2-bar(r<k>))x(k-d), wherein, K1-bar(r<k>) is a controller grain, x(k) is a system state, time delay d>=0, and DeltaK1-bar(r<k>) and DeltaK2-bar(r<k>) are controller grain disturbances.

The invention discloses a l1 small gain theorem and a stability determination method for an Metzler time-varying delay system based on the theorem. The stability determination method comprises the steps that a classical small gain theorem is extended based on a l1 stability concept to construct the l1small gain theorem, and a l1 stability sufficient condition for an M-delta feedback control systemis established; an Metzler dynamic system with time-varying delay is modeled, and a feedback control system composed of a deterministic system M and an uncertain system delta is constructed, a delay-dependent relevant portion of the Metzler time-varying delay system is regarded as a linear uncertainty operator; and based on the constructed l1 small gain theorem, a stability criterion of the Metzler time-varying delay system is established. This theorem can provide a powerful tool for a series of questions of the l1 stability in the field of analytical control, and can be used for the analysisand study of non-negative constrained dynamic systems with time-delay, such as in economics, population systems, biology, and networks.