摘要:
An electric vehicle includes a vehicle body, a front wheel supported on the vehicle body for steering motion in accordance with motion of the vehicle body, a pair of rear wheels supported on the vehicle body for steering motion, a steering unit configured to regulate a steer angle of each of the rear wheels, a motor unit configured to independently apply a wheel torque to each of the rear wheels, and a control unit. The control unit is configured to control the total of the wheel torques in accordance with an associated setpoint, and to control the steer angles and the difference between the wheel torques so that the attitude and the yaw rate vary in accordance with associated setpoints.
摘要:
A controller (8) controlling a drive force distributed to each wheel (1-4) of a vehicle sets dynamic drive force target values (Fxf**, Fx3**, Fx4**) to the wheels, and determines a variation amount target ratio related to variation amounts (ΔM, ΔFx, ΔFy) of a vehicle yaw moment (M), a vehicle front/aft force (Fx), and a vehicle lateral force (Fy) such that a vehicle behavior generated by the dynamic drive force target values does not vary. The controller (8) determines sets of the drive forces (Fxf(j, k), Fx3(j, k), Fx4(j, k)) realizing the variation amount target ratio, selects drive force command values from these sets such that each drive force command value is within a drive force limiting range, and controls a drive force regulating mechanism (20, 12, 13, 15,16) according to the selected drive force command values.
摘要:
A drive force distribution system for a four wheel independent drive vehicle is configured to suppress changes in longitudinal and lateral accelerations and change in yaw moment about the center of gravity of the vehicle that occur when the brake/drive force of one wheel changes or is changed deliberately. The drive force distribution system is configured such that when the brake forces and the drive forces determined by the brake/drive force determining section based on the motion requirements of the vehicle are to be changed, the drive force revising section revises the brake/drive forces of the left front wheel, the right front wheel, the left rear wheel, and the right rear wheel by amounts, respectively, based on the sensitivities of the tire lateral forces of each of the wheels estimated by the tire lateral force sensitivity estimating section so as to satisfy the motion requirements of the vehicle.
摘要:
A drive force distribution system for a four wheel independent drive vehicle is configured to suppress changes in longitudinal and lateral accelerations and change in yaw moment about the center of gravity of the vehicle that occur when the brake/drive force of one wheel changes or is changed deliberately. The drive force distribution system is configured such that when the brake forces and the drive forces determined by the brake/drive force determining section based on the motion requirements of the vehicle are to be changed, the drive force revising section revises the brake/drive forces of the left front wheel, the right front wheel, the left rear wheel, and the right rear wheel by amounts, respectively, based on the sensitivities of the tire lateral forces of each of the wheels estimated by the tire lateral force sensitivity estimating section so as to satisfy the motion requirements of the vehicle.
摘要:
An electric vehicle includes a vehicle body, a front wheel supported on the vehicle body for steering motion in accordance with motion of the vehicle body, a pair of rear wheels supported on the vehicle body for steering motion, a steering unit configured to regulate a steer angle of each of the rear wheels, a motor unit configured to independently apply a wheel torque to each of the rear wheels, and a control unit. The control unit is configured to control the total of the wheel torques in accordance with an associated setpoint, and to control the steer angles and the difference between the wheel torques so that the attitude and the yaw rate vary in accordance with associated setpoints.
摘要:
A method and apparatus for rapidly causing a slip of a driving wheel to converge regardless of the change in vehicle conditions when the driving wheel is in a slip state. When a slip occurs on a driving wheel, a second driving force command value is calculated from a driving force control value controlled by driving force control means and an angular acceleration. The second driving force command value is calculated so that torque capable of being transmitted to a road surface by the driving wheel takes the maximum value. Therefore, even if the friction coefficient of road surface or the wheel load changes, the driving torque of driving wheel can be commanded properly, so that the slip can be converged rapidly. The occurrence of slip at the time of re-acceleration after slip convergence can be avoided.
摘要:
A method and apparatus for rapidly causing a slip of a driving wheel to converge regardless of the change in vehicle conditions when the driving wheel is in a slip state. When a slip occurs on a driving wheel, a second driving force command value is calculated from a driving force control value controlled by driving force control means and an angular acceleration. The second driving force command value is calculated so that torque capable of being transmitted to a road surface by the driving wheel takes the maximum value. Therefore, even if the friction coefficient of road surface or the wheel load changes, the driving torque of driving wheel can be commanded properly, so that the slip can be converged rapidly. The occurrence of slip at the time of re-acceleration after slip convergence can be avoided.
摘要:
An end burning type gas generator includes a hollow cylindrical combustor, a propellant that is densely charged in the combustor concentrically and in a plurality of layers without leaving a large void in an internal cross section and that has the same sectional area in each of the layers, and an interstructure separating the plurality of layers from each other and connecting only at a turning portion at an axial end. The propellant end burns sequentially, progressing via the turning portion, beginning with an outermost layer or an innermost layer. The turning portion includes an end outer plate continuously surrounding ends of inner propellant and outer propellant, and a burning rate increasing member provided along the inner surface of the end outer plate to increase the burning rate of the propellant. The end outer plate is shaped such that the burning area at the turning portion remains substantially constant.
摘要:
A method of forming a solder ball includes the steps of forming an electrode pad on a substrate, forming an insulating layer having a first opening at a position of the electrode pad, filling the first opening with solder paste that include solder and first resin, and applying a heating process to the solder paste so as to form a solder ball on the electrode pad and to form a cured resin member of the first resin across a border between the electrode pad and the substrate.
摘要:
A pulse rocket motor has a hollow cylinder-like first grain situated in a rear section of a pressure vessel; a first igniter for igniting the first grain; a hollow cylinder-like second grain situated in a front section of the pressure vessel; a second igniter for igniting the second grain; and a dividing sheet member that covers the second grain within the pressure vessel. The dividing sheet member includes a dividing sheet expanding at least along the inner circumferential surface of the second grain and holders formed integrally with the dividing sheet at both ends of the dividing sheet by cure adhesion and attached to the pressure vessel. The dividing sheet includes a brittle portion that expands along the inner circumferential surface of the second grain through a rear end face of the second grain and is more brittle than other portions.