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32 results about "Right half-plane" patented technology
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In complex variables, the right half plane is the set {z∈ℂ : Re(z)>0} of all points in the complex plane whose real part is positive,
Apparatus and method for estimating a facial pose and a face recognition system using the method
An apparatus for estimating a facial pose. The apparatus includes a pre-processing module that provides feature points of a subject's face of a received image, and a pose-estimation module that computes sizes of a left half plane and a right half plane of the face from the provided feature points, and a lateral rotation angle of the face from the computed sizes.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and apparatus for modifying right half-plane zero in a cascaded DC-DC buck-boost converter
A method to generate a substantially DC output having a voltage level different than a DC input, constituted of receiving a feedback signal representing at least one of the voltage level and the current level of the generated substantially DC output; relatively emphasizing the high frequency portion of the feedback signal; controlling the buck function of a cascaded buck-boost converter with a first switching signal having a first duty cycle, the first duty cycle being a first function of the received feedback signal responsive to said relatively emphasized high frequency portion; and controlling the boost function with a second switching signal having a second duty cycle, the second duty cycle being a second function of the received feedback signal, wherein the first switching signal and the second switching signal are continuously enabled to facilitate a continuous conduction mode.
Owner:MICROSEMI CORP
Method and apparatus for modifying right half-plane zero in a cascaded dc-dc buck-boost converter
A method to generate a substantially DC output having a voltage level different than a DC input, constituted of receiving a feedback signal representing at least one of the voltage level and the current level of the generated substantially DC output; relatively emphasizing the high frequency portion of the feedback signal; controlling the buck function of a cascaded buck-boost converter with a first switching signal having a first duty cycle, the first duty cycle being a first function of the received feedback signal responsive to said relatively emphasized high frequency portion; and controlling the boost function with a second switching signal having a second duty cycle, the second duty cycle being a second function of the received feedback signal, wherein the first switching signal and the second switching signal are continuously enabled to facilitate a continuous conduction mode.
Owner:MICROSEMI CORP
System and method for feedback control
A system and method for controlling a plant having a minimum phase transfer function P(s) and given an input signal u, the plant having an output y and a plant frequency range comprising a transfer function J(s) comprising the product of a high gain filter J1(s) having a gain k1 sufficient thatJ(ω)>[1+1ɛ]when |ω|≦ω1 and |1+J(ω)|>1 / M for all ω wherein ω1 is selected to obtain a desired time response, and a low pass filter J2(s) selected such that |1+J(ω)|>1 / M for all ω and J(s) is strictly proper, wherein ε<1 and M>1 and ε and M are selected to meet a desired sensitivity requirement. An error signal e is calculated comprising the difference between the system input signal u and the plant output signal y, and the error signal modified according to the transfer function C(s)=P−1(s)J1(s)J2(s) and inputting the error signal into the plant. The system and method can be extended to unstable invertible plants. A global sensitivity bound M≧1 could also be achieved for plants including right half planes zeros. The system and method are shown applied to a read-write head positioning actuator of a hard disk drive, but can be applied equally to other systems such as electrical systems, mechanical systems, industrial processes, military applications, flight control, power generation, computer servo systems, phase lock loops and the like.
Owner:POLYVALOR S E C
LDO circuit using bidirectional asymmetry buffer structure to improve performance
InactiveCN101281410AImprove stabilityImprove transient response performanceElectric variable regulationFrequency compensationRight half-plane
A LDO circuit using two-way asymmetry buffer mechanism to improve performance. The two-way asymmetry buffer mechanism is adopted, at the same time, a feedback circuit with signal back function and a forward passage with signal direct function are adopted; the feedback circuit is used for realizing a frequency compensation of the LDO circuit and improving temporal response performance; the forward circuit is used for counteracting a right half-plane zero point generated by a grid leak parasitic capacitance of a LDO transfer component so as to improve the stability of the system and gain bandwidth of an expanded unit. This circuit has advantages of simple structure, low energy consumption, and effectively removing the right half-plane zero point.
Owner:BEIJING MXTRONICS CORP +2
Boost converter model-based negative regulation voltage suppression condition analysis method
ActiveCN106446326AImprove steady state performanceCAD circuit designSpecial data processing applicationsExperimental validationCapacitance
The invention relates to a Boost converter model-based negative regulation voltage suppression condition analysis method. The method comprises the following steps of 1: building a Boost converter research model; 2: determining key parameters involved by negative regulation voltage leap by analyzing a mechanism of generating a negative regulation voltage in a CCM-CISM mode; 3: building a negative regulation voltage mathematic model, and analyzing influence of inductance and capacitance on the negative regulation voltage; 4: determining inductance and capacitance selection conditions of suppressing the negative regulation voltage; and 5: performing simulation and test verification. For the problems of an instable system, negative regulation of an output voltage, reduced system response speed and the like caused by right half plane zero in a Boost converter mathematic model, a converter parameter design principle of suppressing the negative regulation voltage is provided, an analysis method for solving the problem is given, and a used modeling form is of important significance for a reference provided for analyzing the problem.
Owner:XIAN UNIV OF SCI & TECH +1
Direct-current slow-charging pile suitable for large scale parking lot and robust controller designing method
ActiveCN106972570AImprove reliabilityReduce design capacityCharge equalisation circuitCharging stationsTransformerEngineering
The invention discloses a direct-current slow-charging pile suitable for large scale parking lot and a robust controller designing method. A three-phase industrial frequency transformer is installed on an alternating current wire inlet side in a parking lot power distribution room to carry out overall electrical isolation. An active power filter (APF) is parallelly connected to the wire outlet side of the three-phase industrial frequency transformer. Multiple direct-current slow-charging pile modules are parallelly connected to the wire outlet side of the three-phase industrial frequency transformer. Each direct-current slow-charging pile module comprises a three-phase uncontrolled rectification bridge of a preceding-stage filtering-free capacitor and a rear-stage Superbuck charging port converter. The direct-current slow-charging pile is advantaged by high reliability and efficiency, simple in structure and control and quite low in cost. The input voltage is six frequency doubling direct-current filtering waves, so the zero point of the right half plane of the charging port converter is continuously changed along with the working voltage. The output side comprises quite big low-frequency ripple (LFR) components.
Owner:NANTONG UNIVERSITY
Main circuit structure eliminating right half plane zeros of boost DC-DC (Direct Current - Direct Current) converter and method for determining parameters thereof
InactiveCN103401416AImprove homeostasisImprove dynamic performanceDc-dc conversionElectric variable regulationCapacitanceDc dc converter
The invention discloses a main circuit structure eliminating right half plane zeros of a boost DC-DC (Direct Current - Direct Current) converter and a method for determining parameters thereof. The main circuit structure eliminating the right half plane zeros of the boost DC-DC converter comprises a main circuit structure of the boost DC-DC converter comprising a diode capacitor network; and two ends of a middle voltage stabilizing capacitor on the main circuit structure of the boost DC-DC converter are connected in parallel with an RC (Resistor Capacitor) damping circuit respectively. By the adoption of the main circuit structure eliminating the right half plane zeros of the boost DC-DC converter and the method for determining the parameters thereof, the zeros of a right half plane in a boost DC-DC converter system comprising the diode capacitor network are eliminated via a mode that the two ends of the middle voltage stabilizing capacitor are connected in parallel with the RC damping circuit respectively; therefore, a system controlled to the minimum phase of output voltage is obtained; the controller design of the boost DC-DC converter based on the diode capacitor network is effectively simplified; the steady and dynamic performances of the output voltage of the system are improved; and meanwhile, the dynamic response of the output voltage is sped up, and unstable potential hazards which may exist in the system are eliminated.
Owner:XI AN JIAOTONG UNIV
Vehicle surrounding viewing system
InactiveUS6472995B2Detection of traffic movementColor television detailsRight half-planeOptoelectronics
Owner:AUTONETWORKS TECH LTD +2
Decoupling internal die controller, control system, and control method of multivariable time-lag non-minimum-phase non-square system
ActiveCN105549385AEasy dynamic decouplingOvercoming the limitations of inversionProgramme controlAdaptive controlAutomatic controlTime lag
The embodiment of the invention, which relates to the automatic control field of the process industry, provides a decoupling internal die controller, control system, and control method of a multivariable time-lag non-minimum-phase non-square system. The decoupling internal die controller comprises a dynamic decoupling compensation module, a generalized dynamic inversion module, a low-pass filter module, and an all-pass compensation module. To be specific, the dynamic decoupling compensation module is used for eliminating coupling based on the integrated design of an object model correlation matrix to realize dynamic decoupling; the generalized dynamic inversion module is used for calculating an input value according to a given value of a generalized controlled object, so that an output value of a controlled variable reaches the given value; the low-pass filter module is used for enhancing robustness of the system; and the all-pass compensation module is used for eliminating an adverse effect of a non-minimum phase part, being a zero pint of a right half plane (RHP) of the generalized controlled object, wherein the generalized dynamic inversion module can be realized based on the all-pass compensation design. According to the invention, the control equipment, system, and method are simple and feasible; the non-implemented factor of dynamic decoupling can be eliminated; the difficulty of inversion of the dynamic decoupling design controller process of the controlled object can be substantially reduced; the complete and dynamic decoupling can be realized; and the control precision and robustness of the system can be improved.
Owner:BEIJING UNIV OF CHEM TECH
Stability determination method for DC micro-grid in master-slave control mode
ActiveCN106877309ASimple calculationImprove scalabilityEnergy industryDc source parallel operationConstant powerRight half-plane
The invention relates to the stability analysis technology in the DC micro-grid technologies, and aims to provide a stability determination method for a DC micro-grid in the master-slave control mode. The method comprises the following steps: using the unit connection method to carry on the Thevenin / Norton equivalent to the power modules of each power supply and each constant power load so as to obtain the corresponding impedance / admittance, and obtaining the impedance matrix of the main power supply, the admittance matrixes of the slave power source and the constant power load; according to the known resistive load size of each node, obtaining the resistive load admittance matrix, and obtaining the system node admittance matrix according to the inter-node cable parameter; placing each matrix into the stability criterion and calculating its pole; if all the poles are on the left half plane, determining that the system is stable; and if there is a pole on the right half plane, determining the system is unstable. The method is compatible with the inter-node impedance of the system, and has no specific requirement for the system structure, and has a wide application range. The calculation is simplified in the system-level stability analysis and the stability of the complex DC micro-grid can be effectively analyzed.
Owner:ZHEJIANG ZHONGXIN POWER ENG CONSTR CO LTD +1
Device and method for increasing low voltage drop voltage-stabilizer compensation
This invention provides a low voltage-drop regulator including an error amplifier, a dynamic offset circuit, a drive circuit, a feed back circuit and a compensation circuit, in which, said low voltage-drop regulator also includes a zero generator, which can regulate the compensation condenser relatively to provide high efficient compesation when the load is rather big since the new structure of zero generator is added to provide an internal zero to the system so as to avoid the appearance of conjugate poles on the right half plane.
Owner:O2MICRO CHINA
Compensation Scheme to Improve the Stability of the Operational Amplifiers
ActiveUS20140253057A1Amplification control detailsElectric variable regulationAudio power amplifierRight half-plane
A right-half plane (RHP) zero (RHZ) compensation scheme to improve the stability of the operational amplifier. A resistance RZ is implemented by a transistor. This transistor tracks process variations of the transistor drive by the op-amp to achieve better stability without requiring a bandwidth reduction. As a current source is not available to bias this transistor, a local bias circuit is used to provide this.
Owner:SANDISK TECH LLC
Two-phase staggered magnetic integration boost converter without right half plane zero-point
ActiveCN105262336AFast dynamic responseImprove power densityDc-dc conversionElectric variable regulationRight half-planeMagnetic integration
The invention provides a two-phase staggered magnetic integration boost converter. Inductances La and Lb, and inductances Lc and Ld form two phase respectively; the drive signals of switch tubes S1 and S2 mutually stagger with each other by 180 DEG; the inductances La, Lb, Lc and Ld share the same magnetic core; and La is coupled with Lb and Lc in the opposite direction, and is coupled with Ld in the forward direction. The invention also provides a condition for removing a right half plane zero point through a converter. When the parameter design is reasonable, the converter can satisfy the minimum phase system within the wide duty ratio working range, and can greatly improve the dynamic response speed of the converter. Except for the above advantages, the output filtering inductances are integrated in the same magnetic core and the power density of the converter can be greatly improved.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
State machine controller-based Boost DC-DC converter load estimation method
InactiveCN110086343AImprove robustnessDc-dc conversionElectric variable regulationDc dc converterEstimation methods
The invention provides a state machine controller-based Boost DC-DC converter load estimation method. The method comprises steps: 1, a differential equation is established under a different circuit structure according to a control variable selected by a Boost converter, and a phase plane relative to the control variable is established; and a second-order sliding mode control-based finite state machine controller is established for the Boost converter, and in a condition without output overshoot, second-order sliding mode control-based finite state machine controller convergence conditions areacquired; 2, according to the workflow of the state machine and the working characteristics of the Boost circuit, the estimation formula and the estimation program workflow of a load when a left halfplane of the phase plane works is derived and obtained; and 3, according to the workflow of the state machine and the working characteristics of the Boost circuit, the estimation formula and the estimation program workflow of the load when a right half plane of the phase plane works is derived and obtained.
Owner:CHONGQING UNIV
Forward-flyback dual-path balanced load switching power supply circuit
PendingCN108494263AReduce the number of turnsSmall withstand current stressDc-dc conversionElectric variable regulationLow noiseLoop design
The invention discloses a forward-flyback dual-path balanced load switching power supply circuit, which comprises: an input end, a first transformer T1, a second transformer T2 and a dual-path outputend, wherein the first transformer T1 and the second transformer T2 convert a direct current input from the input end into an alternating current and output the alternating current to the dual-path output end, a primary winding of the first transformer T1 is connected with the input end, the primary winding of the first transformer T1 is connected in series with a primary winding of the second transformer T2, and a secondary winding of the first transformer T1 and a secondary winding of the second transformer T2 are connected in parallel and each connected with the dual-path output end. Through designing the forward transformer and the flyback transformer, the forward-flyback dual-path balanced load switching power supply circuit has the advantages of low noise, high efficiency, small ripple, high power density, easy loop design and no right half plane zero point when operating in a continuous mode, since the two transformers transfer energy to the secondary stage simultaneously, the number of turns of the transformers is small, the transformers are easy to wind, the wire diameter of the secondary stage is reduced by half, the current stress on a power switching tube is small and the like.
Owner:SHENZHEN ZHENHUA MICROELECTRONICS
Generalized stability criterion and application method for power electronic system
InactiveCN109738707ARealize analysisRealize judgmentResistance/reactance/impedenceElectronic systemsRight half-plane
The invention discloses a generalized stability criterion and application method for a power electronic system. When a condition that the number of poles of a system open loop transfer function in a right half plane of an S plane is equal to the number of turns of Nyquist curve anticlockwise surrounding points (-1, j0) of the open loop transfer function is satisfied, a closed-loop system is stable. According to the generalized stability criterion for the power electronic system provided by the invention, the generalized stability criterion is applied to a non-minimum phase system, a criterionapplication range is improved, and accuracy is improved.
Owner:张欣
Design method of amplifying circuit and amplifying circuit
The invention discloses a design method of an amplifying circuit and the amplifying circuit. The design method comprises the steps that an amplifying device is selected according to a technical instruction; according to the selected amplifying device, a power supply circuit used for supplying power to the amplifying device is designed; an input circuit is designed, so that a signal source and theamplifying device are matched in input impedance; an output circuit is designed, so that a load and the amplifying device are matched in output impedance; and a debugging circuit is designed, so thatthe amplifying circuit meets a pole constraint condition, wherein the pole constraint condition comprises that at least one pole of the amplifying circuit in a complex plane moves from an initial position to a right half plane, a virtual axis or a position nearby the virtual axis at least along with increase of input signal power and is finally stabilized at the virtual axis, the right half planeor a left half plane. Compared with the prior art, the gain of the amplifying circuit is increased.
Owner:杨娇丽
Cuboid sodium-sodium-water integrated steam generator
ActiveCN109737365AReduce the impactAvoid influenceStationary tubular conduit assembliesSteam generation using hot heat carriersRight half-planeHeat transfer efficiency
The invention relates to the technical field of nuclear power plant steam generators and particularly disk a cuboid sodium-sodium-water integrated steam generator. A barrel in the steam generator is of a cuboid shell structure. The upper end of the barrel is provided with an upper tube plate. A plurality of sodium-water heat transfer tubes are arranged in the barrel. The two ends of the sodium-water heat transfer tubes are arranged on a left half plane and a right half plane of the upper tube plate correspondingly. The upper end of the barrel is provided with an upper sealing head. The upper sealing head and the upper tube plate are divided into two independent spaces, namely, a steam chamber and a water supply chamber, through a vertical partition board, and the steam chamber and the water supply chamber communicate with two ports of each sodium-water heat transfer tube. The sodium-water heat transfer tubes are arranged in the barrel. The outer sidewall of the barrel is provided withan encircling plate. One ports of the sodium-water heat transfer tubes on the sidewall of the barrel are enclosed to form primary sodium inlets. The encircling plate encloses the other ports of the sodium-water heat transfer tubes to form primary sodium outlets. The steam generator provided by the invention improves the heat transfer efficiency. The number of sodium circulation processes is reduced to one. The resistance in the technological process is obviously reduced.
Owner:中核龙原科技有限公司 +1
Control method of switching converter with right half plane zero point
ActiveCN109546858AMing design ideasHigh feasibilityDc-dc conversionElectric variable regulationTransient stateSystems analysis
The invention relates to the field of control methods for switching converters, and specifically relates to a control method of a switching converter with a right half plane zero point. The inventionprovides a method for restraining negative regulation voltage aimed at problems of poor transient performance of a switching converter with a right half plane zero point, negative regulation of outputvoltage, and inapplicability of a conventional frequency domain method. A theoretical support that the right half plane zero point can be neglected under certain conditions is given. Steps of a frequency domain method of the switching converter with the right half plane zero is provided, and a Boost converter is used as an example to perform syste / m analysis. The control method has clear design ideas and high feasibility. The method has important significance and practical value for design of a switching converter system with a right half plane zero point.
Owner:SHAANXI SCI TECH UNIV
Vehicle surrounding viewing system
InactiveUS20010035904A1Detection of traffic movementColor television detailsRight half-planeOptoelectronics
In the vehicle surrounding viewing system 1A, the light shielding member 27, that is coated on the areas other than the effective area of the surface of the prism 4 provided in the case 3, can transmit only the ray of light 18L, that enters into the transmit window 2L of the case 3, then passes through the prism side surface 8L, and then internally reflects at the prism side surface 8R, and subsequently is focused by the focusing lens 9 to be guided to the left half plane 10L of the image pick-up plane of the image pick-up element 10, and also the ray of light 18R, that enters into the transmit window 2R of the case 3, then passes through the prism side surface 8R, and then internally reflects at the prism side surface 8L, and subsequently is focused by the focusing lens 9 to be guided to the right half plane 10R of the image pick-up plane of the image pick-up element 10.
Owner:AUTONETWORKS TECH LTD +2
Compensation scheme to improve the stability of the operational amplifiers
A right-half plane (RHP) zero (RHZ) compensation scheme to improve the stability of the operational amplifier. A resistance RZ is implemented by a transistor. This transistor tracks process variations of the transistor drive by the op-amp to achieve better stability without requiring a bandwidth reduction. As a current source is not available to bias this transistor, a local bias circuit is used to provide this.
Owner:SANDISK TECH LLC
Stability determination method for DC distributed system in peer-to-peer control mode
The invention relates to the stability analysis technology of the DC distributed system and aims to provide a stability determination method for a DC distributed system in a peer-to-peer control mode.The method comprises steps that Thevenin / Norton equivalent is carried out for a power source or a load through utilizing a unit connection method, an impedance matrix or an admittance matrix is constructed according to impedance or admittance of the power source, the load or a system mode; each matrix is inputted to stability criteria to acquire characteristic values of a system, if the characteristic values of the system are all on a left half plane, the system is stable; if characteristic values of a right half plane are contained in the characteristic values of the system, the system isunstable. The method is advantaged in that the stability criteria has no specific requirements for the system structure, the method is suitable for radiation type systems and annular systems, and theapplication scope is wide; the method can be used for effectively analyzing stability of complex DC distributed systems including multi-sagging control type power sources, current control type power sources, constant current loads, constant power loads and system inter-node impedance, and impedance regulation measures are carried out to guarantee stability of the systems.
Owner:ZHEJIANG UNIV
Dual-band detector based on indium selenide and gallium nitride and its preparation method
ActiveCN107331718BReduce power consumptionImprove detection efficiencyFinal product manufactureSemiconductor devicesIndiumRight half-plane
The invention discloses a bi-band detector based on indium selenide and gallium nitride and a preparation method thereof, and mainly solves the problem that simultaneous same-position detection in the prior art is impossible. The bi-band detector comprises a substrate (1), a UV absorption layer (2), an insulating layer (3), an infrared absorption layer (22) and two ohmic electrodes (4, 5), wherein the UV absorption layer is positioned on the substrate, the insulating layer is positioned on the left half plane of the UV absorption layer, a step surface is formed on the right half plane of the UV absorption layer, the left half portion of the infrared absorption layer is positioned on the insulating layer, the right half portion of the infrared absorption layer is positioned on the step surface of the UV absorption layer, the left half portion has a smaller area than the insulating layer, the right half portion has a smaller area than the step surface, a first ohmic electrode is positioned on the infrared absorption layer and has an area greater than the infrared absorption layer and smaller than the insulating layer, and the second ohmic electrode is positioned on the step surface of the UV absorption layer. The bi-band detector allows simultaneous UV and infrared bi-band detection, and improves the performance and detection efficiency of a detection system.
Owner:XIDIAN UNIV
A two-phase interleaved magnetically integrated boost converter without right-half-plane zero point
ActiveCN105262336BFast dynamic responseImprove power densityDc-dc conversionElectric variable regulationRight half-planeMagnetic integration
The invention provides a two-phase staggered magnetic integration boost converter. Inductances La and Lb, and inductances Lc and Ld form two phase respectively; the drive signals of switch tubes S1 and S2 mutually stagger with each other by 180 DEG; the inductances La, Lb, Lc and Ld share the same magnetic core; and La is coupled with Lb and Lc in the opposite direction, and is coupled with Ld in the forward direction. The invention also provides a condition for removing a right half plane zero point through a converter. When the parameter design is reasonable, the converter can satisfy the minimum phase system within the wide duty ratio working range, and can greatly improve the dynamic response speed of the converter. Except for the above advantages, the output filtering inductances are integrated in the same magnetic core and the power density of the converter can be greatly improved.
Owner:HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
Transconductance amplifier
ActiveCN105915188AIncrease the dominant pole frequencyIncrease the capacitance of the compensation capacitor to reduce the dominant pole frequencyDifferential amplifiersAmplifier modifications to extend bandwidthTransistor arrayCapacitance
The present invention provides a transconductance amplifier comprising an input circuit, a gain circuit and an output circuit which are successively connected. The gain circuit comprises a MOS transistor array composed of a plurality of MOS transistors, grids of the corresponding MOS transistors between every two adjacent columns of the MOS transistor array are connected, the MOS transistors in each column of the MOS transistors are successively connected, and compensation capacitors are arranged between asymmetrical connection points of the MOS transistors in the output column of the MOS transistor array and an output terminal of the output circuit. According to the transconductance amplifier, compared with a traditional frequency compensation technology, dominant pole frequency of the transconductance amplifier can be reduced through increasing capacitance values of the compensation capacitors, right half plane zero frequency of the transconductance amplifier can also be prevented from being reduced, so that a distance between the dominant pole frequency and the right half plane zero frequency of the transconductance amplifier can be increased, the influence of frequency compensation on frequency characteristics of the transconductance amplifier can be reduced, unity-gain bandwidth of the transconductance amplifier can be improved, and the problem that the transconductance amplifier is possibly unstable can be solved.
Owner:NO 24 RES INST OF CETC
Adaptive hysteresis-loop sliding mode control method for dual-tube buck-boost converter
ActiveCN106130344BEasy to adjustImprove dynamic performanceDc-dc conversionElectric variable regulationHysteresisDouble tube
The invention discloses an adaptive hysteresis sliding-mode control method for a double-tube Buck-Boost converter. Aiming at the characteristic that the double-tube Buck-Boost converter has a right-half-plane zero point, a hysteresis current controller is adopted and the controlled quantity switching frequency is not over-high due to addition of hysteresis; aiming at the characteristic that the converter is relatively wide in input range, an adaptive feedforward is introduced, the hysteresis width is changed according to a change of input voltage and the switching frequency changes within a relatively small range when the input voltage changes; and aiming at the characteristic that the steady state switching frequency is affected by a load change, an adaptive feedback is introduced, a sliding coefficient is adjusted according to the load change and the switching frequency remains unchanged in the load change. Design and implementation of the controller are relatively simple; the response speed is relatively high; and the controller has relatively high stability and robustness, and can be applied to the occasions of a wide-range change of input voltage and a relatively large load change.
Owner:威海天力电源科技有限公司 +1
transconductance amplifier
ActiveCN105915188BIncrease the dominant pole frequencyIncrease the capacitance of the compensation capacitor to reduce the dominant pole frequencyDifferential amplifiersAmplifier modifications to extend bandwidthTransistor arrayCapacitance
Owner:NO 24 RES INST OF CETC
Decoupled internal model controller, control system and control method for multivariable time-delay non-minimum-phase non-square systems
ActiveCN105549385BEasy dynamic decouplingOvercoming the limitations of inversionProgramme controlAdaptive controlAutomatic controlLow-pass filter
The embodiment of the invention, which relates to the automatic control field of the process industry, provides a decoupling internal die controller, control system, and control method of a multivariable time-lag non-minimum-phase non-square system. The decoupling internal die controller comprises a dynamic decoupling compensation module, a generalized dynamic inversion module, a low-pass filter module, and an all-pass compensation module. To be specific, the dynamic decoupling compensation module is used for eliminating coupling based on the integrated design of an object model correlation matrix to realize dynamic decoupling; the generalized dynamic inversion module is used for calculating an input value according to a given value of a generalized controlled object, so that an output value of a controlled variable reaches the given value; the low-pass filter module is used for enhancing robustness of the system; and the all-pass compensation module is used for eliminating an adverse effect of a non-minimum phase part, being a zero pint of a right half plane (RHP) of the generalized controlled object, wherein the generalized dynamic inversion module can be realized based on the all-pass compensation design. According to the invention, the control equipment, system, and method are simple and feasible; the non-implemented factor of dynamic decoupling can be eliminated; the difficulty of inversion of the dynamic decoupling design controller process of the controlled object can be substantially reduced; the complete and dynamic decoupling can be realized; and the control precision and robustness of the system can be improved.
Owner:BEIJING UNIV OF CHEM TECH
A Main Circuit Structure and Its Parameter Determination Method for Eliminating Right Half Plane Zero Point of High Boost DC-DC Converter
InactiveCN103401416BImprove homeostasisImprove dynamic performanceDc-dc conversionElectric variable regulationCapacitanceDc dc converter
The invention discloses a main circuit structure eliminating right half plane zeros of a boost DC-DC (Direct Current - Direct Current) converter and a method for determining parameters thereof. The main circuit structure eliminating the right half plane zeros of the boost DC-DC converter comprises a main circuit structure of the boost DC-DC converter comprising a diode capacitor network; and two ends of a middle voltage stabilizing capacitor on the main circuit structure of the boost DC-DC converter are connected in parallel with an RC (Resistor Capacitor) damping circuit respectively. By the adoption of the main circuit structure eliminating the right half plane zeros of the boost DC-DC converter and the method for determining the parameters thereof, the zeros of a right half plane in a boost DC-DC converter system comprising the diode capacitor network are eliminated via a mode that the two ends of the middle voltage stabilizing capacitor are connected in parallel with the RC damping circuit respectively; therefore, a system controlled to the minimum phase of output voltage is obtained; the controller design of the boost DC-DC converter based on the diode capacitor network is effectively simplified; the steady and dynamic performances of the output voltage of the system are improved; and meanwhile, the dynamic response of the output voltage is sped up, and unstable potential hazards which may exist in the system are eliminated.
Owner:XI AN JIAOTONG UNIV
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