6 results about "Angular velocity" patented technology

A damper control device includes a rate sensor that detects a pitching angular velocity of a vehicle body, a vehicle speed sensor, a steering angle sensor and a calculation unit that detect a roll angle and a yaw angular velocity of the vehicle body, a pressure sensor that detects a pressure of a contraction-side chamber in a front-wheel side damper, a pressure sensor that detects a pressure of a contraction-side chamber in a rear-wheel side damper, and a correction unit that corrects the pitching angular velocity. The pressures are controlled on the basis of the corrected pitching angular velocity and the pressures. The vehicle speed sensor, the steering angle sensor and the calculation unit detect the roll angle and the yaw angular velocity on the basis of a traveling speed and a steering angle.

The invention discloses a two-wheel self-balance vehicle's machine learning control method, comprising: s1) obtaining the current state amount of the balance vehicle wherein the state amount includes the inclined angle and the angular velocity; s2) according to the probability for the optimal behavior, the state behavior index in the current state and the current state amount, obtaining the control signal of a driving motor; s3) according to the control signal, controlling the operation of the driving motor so as to make the balance vehicle tend to be balanced; and using a preset evaluation function to evaluate the change in the state amount of the balance vehicle to obtain the compensation evaluation value; s4) according to the compensation evaluation value, updating the state behavior index under the current state; and s5) observing and updating the current state of the balance vehicle and returning to step 1. According to the invention, the method does not require the prior Knowledge of a model, and has the advantages of self-learning and self-adapting. And the method can be applied flexibly.

The directions of optical axes of headlights of a vehicle are adjusted based on a steering angle by switching filters of different response speed characteristics. The filters are provided with hystereses along boundaries neighboring to each other. The filters are switched depending upon the steering angle and a steering angular velocity to vary the response of swivel control. Therefore, the start of swiveling is not quickened, the filter is not frequently switched, quick motion is suppressed and, hence, smooth motion is realized making it possible to execute a swivel control without causing discomfort.

The invention discloses a calibration method and system for a non-orthogonal error of a gyroscope. The method comprises the steps that step S110, each axial non-orthogonal error of the gyroscope on aninitialized cradle head is zero, and each joint angle of each shaft of the cradle head is controlled at an initial zero position; S120, one shaft of the cradle head is controlled to rotate a preset angle in the corresponding axial direction, and the rotation frequency is updated; step 130, a change value of the joint angle of each shaft of the cradle head and each axial angular velocity measuredby the gyroscope are acquired, an axial non-orthogonal error of a rotating shaft is calculated, and each axial angular velocity is calibrated; S140, whether or not preset conditions are met is judged,if not, S120 is returned to be executed; if yes, the shaft is controlled to return to the initial zero position; S150, whether or not the calibration of each shaft is completed is judged, and if not,other shafts are controlled to be subjected to S120-S140, and if yes, ending is conducted. The calibration method and system for the non-orthogonal error of the gyroscope directly calibrate the non-orthogonal error by arranging the gyroscope on the cradle head to avoid the influence of the installation error.

The present invention relates to a method for calibrating a gyrometer (11) equipping a vehicle (1), the method being characterised in that it comprises the steps of:

• • (a) Acquisition
    • by the gyrometer (11), of a measured angular velocity of the vehicle (1), and
    • by means for measuring (20) at least one quantity representative of the angular velocity of the vehicle (1), of measured values of said at least one quantity representative of the angular velocity of the vehicle (1);
  • (b) Determination by data processing means (21) of values of at least one parameter for calibrating the gyrometer (11) minimising a difference between a first estimated angular velocity of the vehicle (1) and a second estimated angular velocity of the vehicle (1),
    • the first estimated angular velocity of the vehicle (1) being a function of the measured angular velocity and parameters for calibrating the gyrometer (11), and
    • the second estimated angular velocity of the vehicle (1) being a function of the measured values of said at least one quantity representative of the angular velocity of the vehicle (1).