6 results about "Feedforward systems" patented technology

This disclosure describes a feed forward control system for engaging a dissipative energy system for dissipating energy produced by a motor of an electrically-powered machine as a result of deceleration of the machine, for example to decelerate and execute a directional change for the machine. The control system includes a feed forward system that engages based on an input signal to spool up and power-on a dissipative energy system of the machine such that as energy is produced, the energy may be divided between the dissipative system and the charging system of the machine. The feed forward controller operates based on a function of a charging current limit of the battery, inversely proportional to the charging current limit.

The application discloses a kind of digital filter structures for Σ-ΔADC downsampling, adopt full digital method to construct three-order single loop feedforward system, series integrated integral-comb cascaded filter, compensation filter and half-band filter.Integral-comb cascaded filter is composed of multistage integrator series recursion structure, support downsampling multiple programmable, improve parallelism and hardware utilization by moving delay unit position in advance.Compensation filter adopts odd-order integrator multi-branch parallel, reduce resource occupation, significantly improve processing speed;Half-band filter uses retiming technology to adjust coefficient position, reduce critical path delay, improve the highest frequency of system, while reducing the amount of calculation through symmetric structure and multiplexing extraction path, front extraction reduces the demand of operation rate and data loss.The application realizes low power consumption, low hardware consumption and high design flexibility of downsampling filter in Σ-ΔADC digital module.

This disclosure describes a feed forward control system (110) for engaging a dissipative energy system (112) for dissipating energy produced by a motor (102) of an electrically-powered machine (100) as a result of deceleration of the machine (100), for example to decelerate and execute a directional change for the machine (100). The control system (110) includes a feed forward system (314) that engages based on an input signal (310) to spool up and power-on a dissipative energy system (112) of the machine (100) such that as energy is produced, the energy may be divided between the dissipative system (112) and the charging system (104) of the machine (100). The feed forward controller (314) operates based on a function of a charging current limit (108) of the battery (106), inversely proportional to the charging current limit (108).

Provided are a channel coding method and apparatus, and a first user equipment, the method comprising: a first user equipment acquiring K information bits, and setting an initial state of a system convolutional code, a non-system convolutional code, or a feed-forward system convolutional code; the K information bits are encoded using a systematic convolutional code, a non-systematic convolutional code, or a feedforward systematic convolutional code. According to the embodiment of the invention, under the condition that multiple user equipment multiplexes the same time-frequency or space-time-frequency resource for transmission, first user equipment presets that a shift register uses a system convolutional code, a non-system convolutional code or a feed-forward system convolutional code in an initial state; according to conditions such as a channel, the number of activated users and the like, a proper channel code is selected to code K pieces of information and determine whether to truncate the coded tail bit, so that non-orthogonal multiplexing of more users or random access of more users can be supported by using the coding scheme, and the system transmission or random access efficiency is improved.

A system simulating a decisional process in a mammal brain about characteristics of motions related to body gestures of a visually observed body through a simulated visual path is provided. The system includes an interface toward simulated neuronal structures, the interface at least converting luminous information of the observed body to an optic flow data stream conveying information related to the visually observed body and that can be processed in the simulated neuronal structures, the system being a feed-forward system and comprising hierarchically from the visual observation to the decision: the simulated visual path and its interface, a simulated local motion direction detection neuronal structure for the detection of motion directions with receptive fields, a simulated opponent motions detection neuronal structure, a simulated complex patterns detection neuronal structure, and a simulated motion pattern detection neuronal structure.

This invention discloses a feedforward adjustment method, device, and storage medium for calibrating the consistency of host control execution, belonging to the field of mechanical automation control technology. The method includes: acquiring the control input signal and the actuator output signal during the feedforward system control process, and plotting a measured curve; selecting the dead zone endpoint from the measured curve as the calculation starting point and the extreme point of the actuator output signal as the calculation endpoint, and plotting a desired curve; equally dividing the measured curve and the desired curve into several sampling points to obtain the coordinate data of the measured curve and the desired curve, respectively; obtaining the linearity by calculating the average deviation; comparing the linearity with a preset linearity threshold; if the linearity is greater than the preset linearity threshold, then optimizing by adjusting the actuator input signal. This invention can improve the trajectory accuracy of the host robotic arm in complex high-speed conditions and solve problems such as poor accuracy and lag.