40results about How to "Simplify Control Design" patented technology

The invention discloses a power management architecture and a boost converter applied to the power management architecture, including a boost converter, the input terminals of the boost converter are respectively connected to the pins V that provide low-voltage power for digital circuits IN And the digital circuit connection in the SoC system-on-a-chip; the output of the boost converter is connected to the power supply of the low-dropout linear regulator LDO, and the output of the low-dropout linear regulator LDO provides high-voltage power for analog and radio frequency circuits. The boost converter of the invention has high efficiency, low ripple, wide input and output range, and the power management structure improves the overall power supply efficiency, and is suitable for SoC power supply solutions under advanced technology.

The invention provides a half-bridge modular multi-level single-phase inverter and a modulation method, comprising: a capacitor bridge arm and a modular multi-level bridge arm; the modular multi-level bridge arm includes: two ports sub-module; the capacitor bridge arm and the modular multilevel bridge arm each include a DC positive terminal, a DC negative terminal and an AC terminal; the DC positive terminal of the capacitor bridge arm and the modular multilevel terminal The DC positive terminal of the bridge arm is connected to the positive terminal of the DC power supply; the DC negative terminal of the capacitor bridge arm is connected to the DC negative terminal of the modular multi-level bridge arm and is connected to the negative terminal of the DC power supply The AC terminal of the bridge arm of the capacitor and the AC terminal of the modular multi-level bridge arm together constitute the AC output port of the single-phase inverter. The novel nearest-level approximation modulation strategy proposed by the present invention for the topology can realize accurate topology output and maintain the effective operation of the system.

The invention discloses a voltage source inverter control method for decoupling electric current in a virtual synchronous coordinate system. The method comprises the step of conducting error PI adjustment and decoupling compensation calculation on dq axis current outputted by an inverter in a virtual synchronous rotating coordinate system, so that an AC output voltage command can be directly generated. The control method disclosed by the invention can eliminate a phase-locked loop link aiming at detecting the phase and the frequency of the rotating vector of grid voltage, and has obvious self-adaptability to frequency deviation; and furthermore, the control method can also be used for supplement and extension of a vector control method based on grid voltage orientation under the condition of deviation of voltage phase and frequency detection. According to the voltage source inverter control method, a grid voltage phase-locked loop is eliminated, the control design of a voltage source inverter is simplified, and the system computing burden and the realization complexity are reduced.

The invention discloses a wearable fingertip force feedback device, comprising: Velcro, finger cots, strings, torsion springs, torsion spring shafts, sliders, guide rails, transition plates, motors, couplings, lead screws, Nut, first lead screw bracket, base, first finger ring, second finger ring and second lead screw bracket. The invention can output the feedback force to the fingertips of the human body to enhance the force-tactile perception in the human-computer interaction.

The present invention proposes an improved active disturbance rejection control method and system for a wireless power transmission system. In order to reduce the observation pressure of the linear expansion state observer for complex disturbances, the present invention is based on the known partial model information b of the controlled system. 1 , first adopt a second-order LESO to the partial disturbance R of the wireless power transfer system 0 Observation estimation is performed, and then the linear expansion state observer observes and estimates other disturbances ω(t) of the system, and compensates the observed total disturbance F(t) in the linear state error feedback control law. The method proposed by the invention has low model dependence, and enables the wireless power transmission system to realize stable output, easy parameter setting and strong robustness under the condition of external disturbance and internal parameter perturbation.

The invention relates to a memory controller and a related control method. The memory controller comprises an address decoder and a protocol controller, wherein the address decoder is used for performing a decoding operation on a received signal to generate a plurality of instruction signals, and the instruction signals include an instruction signal which accesses a plurality of blocks in a memory; and the protocol controller is used for re-deciding an executive sequence of a plurality of the instruction signals according to enabled blocks and data pages in the memory at present to use a plurality of the instruction signals to access the memory.

The invention discloses a dimensionality reduction method for multi-dimensional frequency-domain impedance of a converter, which includes: taking the grid-connected point as the system division point, respectively establishing the positive and negative sequence impedance models of the converter and the AC grid; The positive and negative sequence impedance models of converters are multi-dimensional impedance models, and there is coupling, analyze the coupling characteristics of the multi-dimensional impedance model, and establish the control system of the multi-dimensional impedance model, including: positive sequence path, negative sequence path and the coupling between the two The closed-loop analysis of the control system established above is carried out to obtain the equivalent positive and negative sequence impedance models of the converter under the positive sequence independent external disturbance and the negative sequence independent external disturbance, and the equivalent positive and negative sequence impedance models of the AC grid. Negative sequence impedance model. The dimensionality reduction method of the multi-dimensional frequency-domain impedance of the converter of the present invention can simplify stability evaluation and model verification without affecting accuracy.

The invention discloses a full-automatic electric heater for a water tank. The full-automatic electric heater comprises U-shaped electrical heating components, a controller, a protection cover, a radiating protection sleeve, a flanged connecting piece and a first temperature measuring device. The controller is mounted in the protection cover. An opening is formed in one end of the protection cover. One end of the radiating protection sleeve is connected with the opening, and the other end of the radiating protection sleeve is connected with the flanged connecting piece. The port of each U-shaped electrical heating component is connected with the flanged connecting piece. The first temperature measuring device is mounted in parallel with the U-shaped electrical heating components, and is at a certain height. The U-shaped electrical heating components and the first temperature measuring device are electrically connected with the controller. The full-automatic electric heater has the advantages of being convenient to disassemble and assemble, long in service life and compact in space.

The invention provides a bilinear control model analysis method for a distributed wind power system. The invention provides a solution to the bilinear control problem of a distributed wind power system based on wavelet transform. This method avoids the tediousness and difficulty of directly solving the analytical solution of the bilinear distributed parameter system described by the partial differential equation, and simplifies the process of control design of the bilinear distributed parameter system. The algorithm is simple, the amount of calculation is small, and the control effect is good. It proposes a new solution for the control of bilinear distributed parameter systems.