32results about How to "Improve dynamic tracking performance" patented technology

The invention relates to a PWM (Pulse Width Modulation) control circuit belonging to a power electronic control circuit and solving the problems of modulation error and error increase with the rise of a reference signal existing in the PWM control circuit. The PWM control circuit comprises a first reset integral module, a second reset integral module, an analog inverter, a first digital inverter and a second digital inverter, wherein either the first reset integral module or the second reset integral module comprises a first integrator, a second integrator, a retainer, a first comparator, a second comparator and an R-S (Reset-Set) trigger. The invention has the advantages of simple circuit, convenient implementation and convenient integration, combines PWM and control and improves the quality of an output waveform. In an impulse meaning, no error is accumulated between an output signal and a control reference signal among various switching cycles, and the output signal impulse and thecontrol reference signal impulse are identical in each switching cycle. The invention can keep stable switching output when a switching input signal fluctuates in a large range, greatly improves the control accuracy and the dynamic tracking capability and can be used for the PWM wave generation and the system control of various switching power supply converters.

The invention discloses a DMA real-time modeling method for a city water supply pipe network. The method comprises following steps: firstly, constructing a DMA pipe network model and performing inlet boundary processing; secondly, connecting the pipe network model with a GIS, a revenue system and an SCADA system; then, pre-processing data in an online mode; and finally, simulating in a real-time manner. The DMA real-time modeling method for the city water supply pipe network has following beneficial effects: a DMA real-time model can be set up completely; the model can fully mirror dynamic features of the water supply pipe network so that uncertainty of the model is reduced and simulation precision and dynamic tracking performance can be greatly improved; at the same time, the city water supply pipe network real-time model can be gradually set up with the method as a base and used for tracking abnormity and positioning.

The invention provides a closed loop control method of a fiber optic gyroscope system and a device thereof. The closed loop control method and the device thereof belong to the technical field of the fiber optic gyroscope. The method comprises that an inputted signal passes through a detector, an anterior discharge filter circuit, an A / D converter and a data signal processor sequentially and then an outputted signal is acquired; the data signal processor also adopts the outputted signal as a feedback signal and the feedback signal passes through a D / A converter, a driver and a Y waveguide modulator to counteract the inputted signal Sagnac phase of the fiber optic gyroscope to form the closed loop control. The method comprises that the maximum likelihood estimation method is adopted to obtain the inputted signal followed by the fiber optic gyroscope system; the data signal processor is work out with the servo-tracking problem of the digital system of the optimal control theory. The specific practical implementation way of the invention also provides a data signal processor device. The method and the device have the advantages that the method and the device can improve the dynamic sensitivity of the fiber optic gyroscope system and the dynamic tracking ability of the system.