7 results about "Deceleration time" patented technology

A method (2) for operating an automated driving function of a vehicle (3) comprises the steps of: detecting (21) an object (4) in front of the vehicle; and in response to the detection (21) of the object (4), generating (22) control signals to cause the vehicle (3) to decelerate. The control signals are generated such that, in an initial deceleration phase (P1) ending after a predetermined deceleration time or distance, a first deceleration limit is observed, and in a subsequent follow-up deceleration phase (P2) a second deceleration limit, which is less restrictive than the first, is observed.The subsequent delay phase (P2) is only initiated if, throughout the entire initial delay phase (P1), one and the same detected object (4) has caused the vehicle (3) to decelerate, and if no physically implausible jump in the distance of the object (4) to the vehicle (3) or in other determined movement data of the object (4) has been detected during the initial delay phase.

To provide a printer and a control method capable of quickly printing even when producing high-quality printed matter. [Solution] The printer includes a thermal head, a platen roller, a motor, and a CPU. The thermal head prints on a medium. The platen roller transports the medium toward the thermal head. The motor drives the platen roller by rotating. The CPU switches the motor control mode between a first mode and a second mode. The acceleration / deceleration time in the second mode is longer than the acceleration / deceleration time in the first mode. The amount of jerk change in the second mode is smaller than the amount of jerk change in the first mode.

The invention discloses a motor smooth linear acceleration and deceleration system and a control method, which are applied to the fields of robots, industrial automation, machine tool processing, transportation, metering detection, aerospace, energy production, industrial manufacturing and elevators. The problems that an existing S-shaped acceleration and deceleration algorithm cannot respond quickly, overshoot oscillation exists in a linear control algorithm, and obvious grading echelon acceleration and deceleration are not smooth due to existing fixed grading grade acceleration and deceleration are solved. Fixed-period linear smooth acceleration and deceleration parameters are obtained through scanning period optimization calculation, a driver receives precise control pulse signals of a control system in each scanning period, the driver drives a motor, the control system precisely collects motor encoder information and the motor through an encoder, and according to set target speed data and target acceleration and deceleration time data, the acceleration and deceleration parameters of the motor are calculated according to the set target speed data and target acceleration and deceleration time data. Scanning cycles are collected, reliable scanning cycles are optimized, ideal graded acceleration and deceleration parameters based on reliable scanning cycle data are judged, and speed control of each scanning cycle is accurately achieved.

The invention provides a deceleration time determination method and device, electronic equipment and a program product. The method for adjusting the deceleration time comprises the following steps: determining a processing period; brake energy generated in the current processing period is determined; and determining the speed reduction time of the motor based on the braking energy generated in the current processing period and the current rated power of the braking resistor.

This invention discloses a multi-directional arrival detection method, system, and storage medium for a conveyor line. It involves arranging a first object detection sensor and a second object detection sensor diagonally in the transverse and longitudinal transport intersection areas of a pallet conveyor line. The method sets the position information of virtual deceleration detection points and virtual arrival detection points in each direction, as well as the conveyor line's operating parameters. It records the start and end time difference when one of the object detection sensors is blocked by the pallet. Combined with real-time readings of the actual conveyor line speed, it calculates the pallet's dimensions in the operating direction and synchronizes the actual conveyor line speed. It monitors in real-time the timing of the two sensors being triggered by the pallet; the first trigger is the deceleration point, and the second trigger is the arrival point. The distances from the two points to the corresponding virtual detection points are read according to the pallet direction. Combined with the conveyor line's rated high-speed and rated low-speed speeds, it calculates deceleration and arrival parameters. A deceleration command is sent upon reaching the deceleration time, and a stop command is sent upon reaching the arrival time. By using virtual detection points instead of physical sensors for positioning, the hardware cost of the sensors is reduced.

A nonlinear error control method for a five-axis machine tool, relating to the field of precision machining technology, is disclosed. The method involves setting a nonlinear error threshold; deriving forward and inverse kinematics based on the machine tool structure; acquiring tool position information at the beginning and end of the toolpath, calculating the corresponding movement of each axis, setting the starting point, deceleration times, and desired feed rate; calculating the fine interpolation points between the two axes; calculating the nonlinear error; if the error is not specified, then setting the feed rate and recalculating; if the error is not specified, then updating the speed between the two axes, setting the feed rate, and resetting the feed rate. This process is repeated until the end of the operation. For five-axis machine tools with RTCP functionality, by setting an error threshold, adjusting the machining speed between tool positions, and controlling the number and distance between interpolation points, the nonlinear error can be effectively controlled while ensuring machining efficiency.

The invention provides a motor acceleration and deceleration control method, device and equipment and a storage medium, and the method comprises the steps: generating an acceleration and deceleration curve according to the starting frequency, target frequency and acceleration and deceleration time of a motor, dividing the curve into a plurality of stages according to the speed change rate of the curve, and obtaining the starting and ending positions of each stage; according to the speed change rate of each stage, pulse parameters in each stage are extracted, and an extraction point set of each stage is obtained; constructing an index data structure according to the starting and ending positions of each stage and the extraction point set; and searching two adjacent extraction points through the index data structure according to the current pulse count, performing interpolation calculation on the frequency values of the two extraction points to obtain the output frequency of the current pulse, and generating a PWM pulse signal according to the output frequency to drive a motor. According to the method, by means of staged self-adaptive extraction and interpolation calculation, acceleration and deceleration smoothness is guaranteed, meanwhile, storage space occupation is greatly reduced, and real-time calculation complexity is reduced.