Instron开发多毒性测试固定装置

Instron set out to develop a test fixture that applied forces on the race car in multiple axes. Their customer could then measure and evaluate the performance of the car’s suspension and entire handling dynamics.

Instron therefore needed to simulate a highly complex test environment comprising the controller, the test fixture, and the mechanics of the car, which itself had fifteen moving parts for each wheel. The test fixture integrated control systems and sophisticated mechanical components. These included 18 hydraulic actuators, each of which was connected to the car using mechanical linkages with rotating joints. Specialized parts needed to be designed and incorporated into the mechanical design to minimize friction in the joints.

尽管Instron为乘用车和赛车生产了许多完整的车辆测试固定装置，但该项目比以往任何时候都需要更高的系统性能和更高的控制精度。

在先前的项目中，Instron已使用Simulink对控制系统进行建模和机械建金宝app模软件包来建模机械零件。Plummer说，使用单独的环境减慢了设计过程，因为它“需要在每个时间步骤之间在两个求解器之间来回传递信息”。

为了提高效率，Instron使用一个集成的环境来对每个组件进行建模。他们选择了Matlab^®，S金宝appimulink和Simscape多体，以同时模拟控制器和测试固定装置。然后，他们可以使用控制器和测试固定装置的仿真结果来改善每个设计的设计。

Instron工程师开发了MATLAB和SIMULINK的新控制器，并使用Simulink和Simscape Multibote来金宝app对测试固定装置进行建模。以前，他们已经开发了一种液压成分模型，该模型模拟了整个活塞的压力差金宝app异。他们将此模型集成到SIMSCAPE多体执行器块中，该模型使信号从Simulink获取并用作SIMSCAPE多体主体的力。金宝app

They incorporated the MATLAB and Simulink model of the controller into the Simscape Multibody model of the test fixture. They could then refine the Simscape Multibody model to enable them to test the performance of any test fixture or controller design.

为了加速开发，工程师使用了Simulink编码器金宝app™to generate C code from the Simulink part of the control system. This code runs on a high-speed processing platform that is linked to Instron’s standard digital controllers.