The Advanced Continuous Simulation Language, or ACSL (pronounced "axle"), is a computer language designed for modeling and evaluating the performance of continuous systems described by time-dependent, nonlinear differential equations.
ACSL is intended to provide a simple method of representing mathematical models on a digital computer.
Working from an equation description of the problem or a block diagram, the user writes ACSL statements to describe the system under investigation.
An important feature of ACSL is its sorting of the continuous model equations, in contrast to general purpose programming languages such as Fortran where program execution depends critically on statement order.
Typical areas in which ACSL is currently applied include control system design, aerospace simulation, chemical process dynamics, power plant dynamics, plant and animal growth, toxicology models, vehicle handling, microprocessor controllers, and robotics.