The present invention belongs to the technical fields of novel structure design and lattice material design, and refers to structures, lattice materials, and lattice cylindrical shells with simultaneous stretch- and compression-expanding property. First, use the local tension-compression asymmetry in the tension modulus and compression modulus generated by the contact nonlinearity of the tension springs to construct a type of 2D structures and lattice materials with stretch- and compression-expanding property. Then by assembling the 2D structures in different directions, 3D structures and lattice materials can be constructed. Meanwhile, a lattice cylindrical shell can also be constructed by using the 2D stretch- and compression-expanding structures as the unit cell. The structures and lattice materials presented in this invention can be used as a specific functional material and has a promising application in the fields of energy absorption, vibration reduction, medical treatment, wave propagation, intelligent components, and so on.

The present invention belongs to the technical fields of novel structure design and lattice material design, and refers to structures, lattice materials, and lattice cylindrical shells with simultaneous stretch- and compression-expanding property. First, use the local tension-compression asymmetry in the tension modulus and compression modulus generated by the contact nonlinearity of the tension springs to construct a type of 2D structures and lattice materials with stretch- and compression-expanding property. Then by assembling the 2D structures in different directions, 3D structures and lattice materials can be constructed. Meanwhile, a lattice cylindrical shell can also be constructed by using the 2D stretch- and compression-expanding structures as the unit cell. The structures and lattice materials presented in this invention can be used as a specific functional material and has a promising application in the fields of energy absorption, vibration reduction, medical treatment, wave propagation, intelligent components, and so on.

An ACM-ECU executes a first switching control for switching from a phase fixed control to a phase variable control, or a second switching control for switching from the phase variable control to the phase fixed control, simultaneously with detecting or after having detected switching of a gear position by a gear position detecting function. A current waveform map is used at a time of execution of the phase variable control, and a correction map is used at a time of execution of the phase fixed control.

An ACM-ECU executes a first switching control for switching from a phase fixed control to a phase variable control, or a second switching control for switching from the phase variable control to the phase fixed control, simultaneously with detecting or after having detected switching of a gear position by a gear position detecting function. A current waveform map is used at a time of execution of the phase variable control, and a correction map is used at a time of execution of the phase fixed control.