Implementation of multi-disciplinary data interaction in SIMPACK

With the expansion of the complexity and depth of engineering technology applications, as well as the development of interdisciplinary subjects, the data exchange between disciplines and models has attracted more and more attention in the industry. The multi-body dynamics software - SIMPACK has its own unique advantages in solving the data exchange between multiple disciplines and various models. It provides a variety of implementation methods, and the unique code output function is a highlight in realizing flexible data interaction. The current version of SIMPACK provides a variety of data interaction methods including code output, hardware in the loop (HIL), and software in the loop (matlab).

Introduction to hardware data interaction

SIMPACK provides multiple inoculation ports for hardware data interaction, and the implementation mode is generally shown in Figure 1.

Figure 1

The implementation principle is generally to use the multi-body dynamics SIMPACK software to establish a simulation mathematical model, and transmit the simulation data to the hardware through the hardware interface. The hardware processes the data and returns the processed data to SIMPACK, thereby realizing the hardware-in-the-loop real-time simulation function. The SIMPACK8903 version already supports a variety of international mainstream real-time simulation hardware including DSPACE, ETAS, xPC, VxWorks, etc.

Introduction to software data interaction

SIMPACK also provides a variety of ways to interact with software data, among which the interaction method with MATLAB is shown in Figure 2.

Figure 2 Code Export

Software in the loop is usually achieved through the SIMAPACK interface or third-party software to ensure data transmission between models. Among them, third-party software (matlab) is the most commonly used implementation mode.

SIMPACK provides users with a variety of data interaction methods. As can be seen from Figure 2, the SIMAT method can realize two-way data interaction. The following is a specific example of how SIMAT can achieve interaction.

The background of the example is: an inverted pendulum car, which is running without control and the inverted pendulum falls down. When SIMLINK control is adopted, the SIMAT data is transmitted bidirectionally to ensure real-time speed control of the car, and the inverted pendulum on the car can stand upright steadily. The control scheme is shown in Figure 3, and the effect after control is shown in Figure 4.

Figure 3 Inverted pendulum control scheme

Figure 4 Inverted pendulum control effect diagram

With the development of technology, SIMPACK's data interaction method will become more and more perfect and universal, which will promote the development of multidisciplinary and interdisciplinary subjects.