8 results about "Phase oscillator" patented technology

The invention discloses a hip joint exoskeleton self-adaptive torque control method based on a series elastic driver. The control method comprises the following steps that a three-level control framework is built; a rotation angular velocity signal provided by an inertial measurement unit is used as an input quantity, and a self-adaptive phase oscillator is introduced into a high-level control assembly to realize accurate real-time estimation of the gait phase of a user; according to the obtained user phase estimation, the middle-layer control assembly converts phase information into auxiliary torque needed by the user, an ideal auxiliary torque curve is obtained, and the auxiliary torque needed by the user at different circulation moments is determined; the bottom-layer control assembly receives an ideal auxiliary torque curve from the middle-layer control assembly and controls a series elastic driver to track the curve by adopting a composite continuous sliding mode strategy; and setting an average tracking error, a standard deviation error and a maximum absolute error to carry out analogue simulation and performance evaluation on the high-layer control assembly, the middle-layer control assembly and the bottom-layer control assembly to form closed-loop control of gait phase estimation and torque tracking.

The application discloses a wideband multi-phase coupled traveling wave oscillator, which realizes the switching of the coupling modes of two traveling wave oscillator units through a first switch unit and a second switch unit, so that two different oscillation frequencies are realized, and the output frequency range of the traditional multi-phase oscillator is greatly improved; in addition, the layout of the two traveling wave oscillator units when coupled has a large overlapping part, and the overall area almost does not increase; and the switch used for mode switching is not located on the transmission path in the design, and the parasitic effect of the switch has little influence on the overall performance of the oscillator, and the switch can be applied to high-frequency design.

The invention belongs to the technical field of radars, and particularly relates to a phased array radar based on a multi-phase oscillator, a positioning method, a system and application. The phased array radar comprises an array antenna, a multi-phase oscillator, a gate and a signal receiver. Wherein the array antenna is composed of a plurality of antenna units; the multi-phase oscillator comprises a plurality of injection nodes with equal phase difference. And the gating device is used for sequentially connecting each antenna unit to one injection node of the multi-phase oscillator according to a preset optimal phase difference. And the signal receiver is connected with the output end of the multi-phase oscillator and is used for demodulating an echo signal output by the multi-phase oscillator. The antenna units and the injection nodes are distributed by adjusting the gating logic of the gating device, and then beam forming is carried out on echo signals so as to change the direction of the azimuth angle of the echo signals. According to the invention, the problems of large circuit overhead, high design difficulty and insufficient noise and sensitivity of the existing phased array radar are solved.

In an example, a circuit includes clock data recovery (CDR) circuitry having an input and an output. The circuit also includes a delay circuit having an input coupled to the output of the CDR circuitry, and having an output. The circuit includes a multi-phase oscillator having an input coupled to the output of the delay circuit, and having an output. The circuit also includes a divider having an input coupled to the output of the multi-phase oscillator, and having an output coupled to the input of the CDR circuitry.

This invention discloses a CPG phase oscillator model with flapping switching function and its application. The model introduces amplitude bias by constructing an amplitude bias equation; by changing the cosine function in the output equation to the form of adding the amplitude bias and sine functions, a sinusoidal signal output is achieved, thus realizing spatial asymmetric flapping; the amplitude bias is changed by introducing a spatial asymmetric flapping coefficient; by designing the amplitude bias equation in two different forms with or without zero amplitude, different outputs of quantitative angle bias signals and periodic rhythm signals can be achieved, thus realizing two different modes of flapping and gliding; by introducing the amplitude bias equation and the improved output equation into the traditional CPG phase oscillator model, the construction of a CPG phase oscillator model with flapping switching function can be completed. The CPG phase oscillator model constructed in this invention is used for the switching and motion control of gliding and flapping modes of a biomimetic flapping-wing robot. It can realize the spatial asymmetric up and down flapping of the flapping wing structure and quantitative angle offset. Moreover, the amplitude offset is individually controllable, and the switching between flapping and gliding modes is fast and smooth. It has the characteristics of simple calculation, convenient control and strong environmental adaptability.

A multiphase oscillator circuit is disclosed. According to an aspect, a multiphase oscillator circuit for a millimeter wave (mmW) transceiver is provided. The multiphase oscillator circuit comprises a plurality of inductive coupling ring oscillators, and each inductive coupling ring oscillator comprises a plurality of single-stage active delay units. An output of each of the plurality of inductively coupled ring oscillators is inductively coupled to an output of another of the plurality of inductively coupled ring oscillators.

A system may include an object having a rotational axis. The system may also include a first mass movably mounted to the object and configured to adjust a moment of inertia of the object by translating relative to the object along an inertial path having a first component that is perpendicular to the rotational axis. The system may additionally include a second mass movably mounted to the object and configured to: apply to the object a first torque in a first direction along the rotational axis while the moment of inertia is adjusted above a threshold value and apply to the object a second torque in a second direction along the rotational axis while the moment of inertia is adjusted below the threshold value, by translating relative to the object along a torque path having a second component that is perpendicular to the rotational axis and the first component.

A wireless device (WD) and method for low power millimeter wave (mmWave) receiving for beam tracking are disclosed. According to one aspect, a secondary WD is configured to receive an amplitude shift keying (ASK) modulated signal from a primary WD using at least three antenna branches of a low power receiver. In each antenna branch, the secondary WD down-converts the ASK modulated signal using a local oscillator signal from a free-running multi-phase oscillator applied in a multi-phase mixer to provide a multi-phase intermediate frequency signal. The secondary WD determines a beam direction of the ASK modulated signal by correlating phase adjusted combinations of the intermediate frequency signals from the antenna branches with a reference sequence and provides the beam direction to the a main receiver of the secondary WD. The beam direction may be used for an initial communication between the second receiver and the primary WD.