33 results about "Continuous time system" patented technology

This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., low-frequency glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of the amplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device, to provide a stable, low-noise output signal.

The invention provides a high-precision controller of an ultra-low speed control moment gyro frame servo system. Firstly, the discrete-time system state-space equation is obtained according to the continuous-time system state-space equation of the ultra-low-speed frame servo system, and then the precise estimation of the instantaneous velocity and "lumped disturbance" is realized by designing a double sampling rate expansion state observer, and finally in the velocity loop A compound sliding mode control algorithm based on sliding mode control and disturbance compensation is designed to suppress the "lumped disturbance". The high-precision controller of the ultra-low-speed control torque gyro frame servo system proposed by the present invention not only designs a double sampling rate expansion state observer to solve the estimation performance deterioration of the existing estimation method under the influence of factors such as changes in the model parameters of the ultra-low-speed frame servo system In order to solve the problem, a compound sliding mode control algorithm is also designed to enhance the disturbance suppression ability of the system; starting from two aspects of sensor detection and disturbance suppression, the angular rate control accuracy of the ultra-low speed frame servo system is comprehensively improved.

The invention relates to a volume kalman filter-based radial magnetic bearing displacement detection method and system. The radial magnetic bearing displacement detection method comprises the steps of obtaining radial displacement output signals and rotating speed signals of a rotor in an x direction and a y direction according to a continuous time system and discretizing the continuous time system to achieve extraction of displacement information of the rotor by a volume kalman filter algorithm. According to the volume kalman filter-based radial magnetic bearing displacement detection method and system, linear processing of a radial magnetic bearing which is a nonlinear model essentially is avoided; operation of a displacement-free sensor is achieved; the detection system has very high interference rejection capability; the radial magnetic bearing displacement can be accurately detected; and the radial magnetic bearing displacement can also be detected when the exact nature of the system is unknown.

The invention discloses a data-driven adaptive optimization control method and medium for a random disturbance system. The method includes a problem description part, a design part of a data-driven optimal state observer, and a different-strategy data-driven ADP control part of a random disturbance system; for The above three parts, the present invention has been described in detail. The invention implements different-strategy data-driven ADP control of a random disturbance system by designing a data-driven optimal state observer. For the first time, the data-driven ADP method is used for the system whose state is completely unpredictable; the model-free LQG control is extended to the continuous time system; the non-matching noise outside the control signal channel is considered in the ADP design, and the independent state and control signal are not dependent Noise: A new type of different strategy data-driven ADP control method and medium for random disturbance systems is proposed, which avoids the burden of repeatedly reading and updating control signals, and significantly reduces the amount of calculation.

The invention discloses a continuous time system parallel simulation and error compensation method, which belongs to the technical field of complex system simulation. The present invention first establishes the Jacobian matrix of the continuous time system, then converts the Jacobian matrix into a hypergraph form expression, uses the hypergraph segmentation strategy to divide the hypergraph into multiple parts with as low coupling degree as possible, and then The result of hypergraph partitioning is mapped to the continuous time system to realize the division of the continuous time system into multiple sub-continuous time systems with low coupling between the sub-continuous time systems. Finally, each sub-continuous-time system is distributed on different processors for parallel simulation, and each sub-continuous-time system adopts a dynamically selected interpolation method to interpolate the input value to compensate the error during the simulation process. The invention has the advantages of good universality of the error compensation strategy, can shorten the time-consuming solution of the continuous time system, and can reduce the load of a single computer, and is suitable for the simulation of the continuous time system in the engineering field.

This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of theamplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device, to provide a stable, low-noise output signal.

The invention provides a method for transforming a continuous-time filter to a discrete-time filter. The method includes: sampling input quantity and output quantity of a controlled system, and utilizing an identification algorithm for obtaining a continuous-time model of the system; constructing the continuous-time filter according to the continuous-time model; adopting a partial differential equation method to compute a coefficient matrix of the discrete-time filter according to coefficients in a continuous-time filter equation and adopted time of a discrete system; and constructing a discrete-time filter structure. The discrete-time filter is obtained by performing discrete transformation to the designed continuous-time filter. Compared with an existing discrete-time filter design method, the method has the advantages that discretization processes of a controlled object and filter designing processes based on the discrete system are decreased, and by utilizing advantages of a filter design theory based on a continuous-time system, the filter excellent in performances can be designed, system design and development time can be saved, and the method is particularly suitable for practical engineering application of digital control systems.