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ASOM Examples

On this page we present a selection of examples that demonstrate some of ASOM's most interesting functionalities. Just click on the still next to an example to see a short clip illustrating the corresponding functionality.

You can find more videos (examples and tutorials) on YouTube as well as on our download page.

Kinematic for Pedestrian Protection

Example for a pedestrian-protection-kinematics with a four bar system and an actuator.

The animation includes two parts: Normal opening and closing process and the protection-activation process (in slow-motion).

The use of the Kinematic Synthesis feature in ASOM enables the user to modify any bearing positions without losing the conditions for the desired position of the Hood. 

Pedestrian Protection 2

Another simplified example for a pedestrian protection kinematic, this one based on a different functional principle.

The actuator is activated accordingly, in case of an impending frontal crash with potential pedestrian involvement, and generates as promptly as possible - meaning even before the actual impact happens - an increased safety clearance above the engine block.

With ASOM, corresponding kinematics can be conceptualized, assembled, simulated, analyzed and interactively optimized. 


Piston Two Stroke Engine

Example for the calculation of bearing forces on a cylinder piston of a two-stroke engine, taking into account the inertia and moments of inertia.

Retractable Door Handle

Example of a kinematic for a retractable door handle with kinematic synthesis of two kinematics (via serial connection of two synthesis methods) and the simultaneous consideration of different force and stress cases (with or without tension spring AND with or without breakout force, etc.), taking into account further restrictions such as mounting conditions and collision conditions.

The desired initial, intermediate and end positions are retained even when the technical design is modified.


Spindle Drive

In this example, a complete design for a tailgate with spindle drive is presented. For this purpose, holding forces are taken into account under multiple constraints such as different ground inclinations, an optional snow load, frictions, a clutch, overload cases, safety margins, efficiency factors, etc.

To observe direction-dependent influences, the complete opening process and the complete closing process are evaluated in real time at the same time using compressed time simulation. 

The spindle drive consists of a fully configured spindle and two fully configured springs as additional energy storage elements (general support + popup aid). What is shown here with a one-bar system can be easily transferred to an arc hinge, a four-bar system or a different multi-bar system. 

Toggle Switch

Example illustrating the kinematic analysis and interactive optimization of a toggle switch using the kinematics software ASOM v7.

In this example the operating forces for the toggle switch are analyzed. Different cases are analyzed at the same time in the same project:

  • switching on without friction
  • switching off without friction
  • switching on with friction
  • switching off with friction

The subsequent manual optimization of the operating forces by changing the contour takes into account all four cases at the same time and is still very easily accomplished.


Four-Bar Synthesis 1: Creation

Creation of a four-bar synthesis for the height adjustment of a car seat in ASOM v7. Using a real time synthesis the joints can be placed according to the given requirements.

Four-Bar Synthesis 2: Behavior

An example for the behavior of a four-bar synthesis in ASOM v7. The linkage is based on a practical example demonstrating the compu­tation of the movements and forces while opening and closing a car’s trunk lid. As you can see, all of these factors are changed in real time even while editing the linkage.


Six-Bar Synthesis 1: Creation

Creation of a linkage to fold away and store the retractable hardtop of a convertible in ASOM v7. The six-bar synthesis used in this example is based on a Watt linkage.

Six-Bar Synthesis 2: Adaption

Linkages that have been constructed for a retractable hardtop are used to compare the adaptability of six-bar and four-bar syntheses in ASOM v7. In both cases the highest priority the software has is to preserve the synthesis.


Truss Calculation

An example for the interactive calculation of loads and forces in a truss with the kinematics software ASOM v7.

Canvas-Lifting Mechanism

In this example generated 'on-the-fly', a canvas-lifting mechanism (e.g. for home cinema projection), supported by two gas springs, is animated and the needed lifting force ist calculated.

Finally, the fixed bearings of the two subsystems are modified simultaneously and the resulting changes of the necessary lifting force (here at room temperature: 20°C) over the entire opening process can be observed in real time in the diagram.


Kinetostatic Sensor Field

In this 'on-the-fly' generated example of a four bar system the simultaneous kinetostatic determination and modification of several alternative manual force positions will be shown (as a sensor field) for an operating kinematic solution.

Elliptical Cross Trainer

In this example the kinematics, and partially also the kinetostatics, of a Cross Trainer are analyzed in ASOM v7. To accomplish this, the forces exerted by the person are added to the system and the countering forces (or torques) of the flywheel are used to bring the force system into a kinetostatic equilibrium. At one bearing the determination of the bearing forces is shown, and with the aid of an auxiliary slider the (simplified) power output of the person can be varied interactively.

The kinematics are distributed over three layers and connected at certain contact points.

  1. Left Cross Trainer layer
  2. Person
  3. Right Cross Trainer layer 

Straight Line Mechanisms

Converting rotary into smooth linear motion was one of the biggest kinematic problems inventors faced in the late 17th century. For these videos we have recreated various straight line mechanisms in ASOM v7 that have solved the problem in approximation – or even exactly.

Approximate Solutions

Watch this combination of clips here that show the movement of straight-line mechanisms according to Chebyshev, Watt, Roberts, Hoecken, and Evans, as well as a harbor crane mechanism, a straight crank linkage, a conchoidal and an indicator mechanism.

Or watch the individual clips on YouTube.

Exact Solutions

Watch this combination of clips here that show the movement of straight-line mechanisms according to Roemer-Cartwright, Peaucellier, Hart, Kempe, and Sylvester, as well as a pantograph and a symmetrical crank slider with and without synthesis.

Or watch the individual clips on YouTube.


Optimizer 1: Movement Optimization

Design of a mechanical system with the Optimizer in ASOM v4. We formulate quality criteria based on an intended motion, thus creating a rule set. The goal is to optimize the quality index of that rule set.


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