4 results about "Transmission cycle" patented technology

A method (100) for characterizing a sliding friction condition in an electrically assisted steering system (20) having a rack (22), a gear train (26) arranged at one end of a steering shaft (25) in meshing engagement with the rack (22), a steering motor (43), and a drive mechanism (129) electrically assisting a steering input to the steering system (20) via the steering motor (43), the method comprising: Connecting (S102) a torsion bar (54) and an inertia disc (52) to the steering shaft (25); Transmitting (S104) a periodic steering control signal from a controller (50) to a rotary actuator (42) while the steering motor (43) and the drive mechanism (129) assist the steering input, thereby causing rotation of the steering shaft (25) via the torsion bar (54) and the inertia disk (52) over a calibrated range of steering angles; Measuring (S106) a displacement of the rack (22) from a center position via a linear actuator (49, 149); Applying (S106) an axial force to the rack (22) that is proportional to the measured displacement in a direction that opposes the movement of the rack (22) while the periodic steering control signal is being transmitted; and Measuring (S108) a steering torque output value along the steering shaft (25) via a torque transducer (44) while the periodic steering control signal is being transmitted and the axial force is being applied; and Executing (S112) a control action with respect to the steering system (20) by the controller (50) when a difference between a maximum value of the measured steering torque and a minimum value of the measured steering torque, which occurs after the maximum value of the steering torque, at the start and at each reversal of the direction of the periodic steering control signal, exceeds a calibrated threshold value of approximately 0.3 Nm, which indicates the sliding friction condition.

A vehicle-mounted apparatus includes: a transmission processing unit configured to perform a transmission process for transmitting, to another vehicle-mounted apparatus, first time synchronization information and second time synchronization information that includes a transmission time at which the first time synchronization information is transmitted, at a predetermined transmission cycle; and a correction unit configured to perform a correction process for correcting the transmission time to be included in the second time synchronization information in a current transmission process, based on a time difference between a current time at the vehicle-mounted apparatus and a previous transmission time, the previous transmission time being the transmission time in the previous transmission process, to a corrected transmission time obtained by adding, to the previous transmission time, the transmission cycle and a value obtained by splitting the time difference.

This application discloses a remote control method, system, vehicle, device, and medium for vehicles. The remote control method includes: receiving remote control commands from a remote service platform via an onboard TBOX and storing the remote control commands in a preset command buffer; sending the remote control commands to the corresponding in-vehicle controller when the next message transmission cycle is reached; if the next message transmission cycle has not been reached and a new command is received, updating the command buffer with the new command, and sending the commands in the command buffer to the corresponding in-vehicle controller when the next message transmission cycle is reached. By storing remote control commands in a buffer, multiple control commands can be continuously issued without waiting for controller feedback. Simultaneously, updating the command buffer with new commands avoids command duplication or conflict within the buffer, thereby reducing communication redundancy and improving remote control efficiency.

An onboard apparatus is an onboard apparatus that performs processing for updating a program of an onboard ECU that is mounted in a vehicle, and includes: a control unit that controls transmission of a frame of an update program to the onboard ECU, and a storage unit that stores a history of a bus load on a bus for transmitting the frame of the update program to the onboard ECU, and the control unit derives, based on the history, a transmission cycle for transmitting the frame of the update program to the onboard ECU, before the frame of the update program is transmitted, and transmits the frame of the update program to the onboard ECU based on the derived transmission cycle.